Add an Extractor to parse subtitles before SampleQueue

The end-to-end test output for the overlapping SRT and SSA subtitles
is currently incorrect. They will be fixed in a future change that
updates `TextRenderer` to support this overlap.

The 'extra' samples visible in the extractor test output files are
'empty cue list' samples produced by `SsaParser`. They will go away
when this implementation is updated to remove this behaviour and rely
on `CuesWithTiming.durationUs` instead (the 'empty list' behaviour is
not required by the `SubtitleParser` interface).

PiperOrigin-RevId: 549264593

libraries/exoplayer/src/test/java/androidx/media3/exoplayer/e2etest/MkvPlaybackTest.java

@@ -22,7 +22,9 @@ import androidx.media3.common.C;
 import androidx.media3.common.MediaItem;
 import androidx.media3.common.Player;
 import androidx.media3.exoplayer.ExoPlayer;
+import androidx.media3.exoplayer.source.DefaultMediaSourceFactory;
 import androidx.media3.exoplayer.trackselection.DefaultTrackSelector;
+import androidx.media3.extractor.DefaultExtractorsFactory;
 import androidx.media3.test.utils.CapturingRenderersFactory;
 import androidx.media3.test.utils.DumpFileAsserts;
 import androidx.media3.test.utils.FakeClock;
@@ -66,21 +68,27 @@ public final class MkvPlaybackTest {
     Context applicationContext = ApplicationProvider.getApplicationContext();
     CapturingRenderersFactory capturingRenderersFactory =
         new CapturingRenderersFactory(applicationContext);
+    // TODO: b/289916598 - Remove this when transcoding is the default.
+    DefaultExtractorsFactory extractorsFactory =
+        new DefaultExtractorsFactory().setTextTrackTranscodingEnabled(true);
+    DefaultMediaSourceFactory mediaSourceFactory =
+        new DefaultMediaSourceFactory(applicationContext, extractorsFactory);
     ExoPlayer player =
-        new ExoPlayer.Builder(applicationContext, capturingRenderersFactory)
+        new ExoPlayer.Builder(applicationContext, capturingRenderersFactory, mediaSourceFactory)
             .setClock(new FakeClock(/* isAutoAdvancing= */ true))
             .build();
-    // TODO(internal b/174661563): Remove the for-loop below to enable the text renderer when
+    // TODO: b/181312195 - Remove this when WebVTT is supported by DefaultSubtitleParserFactory.
-    //  subtitle output is not flaky.
+    if (inputFile.contains("_vtt_")) {
-    for (int textRendererIndex = 0;
+      for (int textRendererIndex = 0;
-        textRendererIndex < player.getRendererCount();
+          textRendererIndex < player.getRendererCount();
-        textRendererIndex++) {
+          textRendererIndex++) {
-      if (player.getRendererType(textRendererIndex) == C.TRACK_TYPE_TEXT) {
+        if (player.getRendererType(textRendererIndex) == C.TRACK_TYPE_TEXT) {
-        player.setTrackSelectionParameters(
+          player.setTrackSelectionParameters(
-            new DefaultTrackSelector.ParametersBuilder(applicationContext)
+              new DefaultTrackSelector.ParametersBuilder(applicationContext)
-                .setRendererDisabled(textRendererIndex, /* disabled= */ true)
+                  .setRendererDisabled(textRendererIndex, /* disabled= */ true)
-                .build());
+                  .build());
-        break;
+          break;
+        }
       }
     }
     Surface surface = new Surface(new SurfaceTexture(/* texName= */ 1));

libraries/extractor/src/main/java/androidx/media3/extractor/DefaultExtractorsFactory.java

@@ -23,6 +23,7 @@ import androidx.annotation.GuardedBy;
 import androidx.annotation.Nullable;
 import androidx.media3.common.FileTypes;
 import androidx.media3.common.Format;
+import androidx.media3.common.MimeTypes;
 import androidx.media3.common.PlaybackException;
 import androidx.media3.common.Player;
 import androidx.media3.common.util.TimestampAdjuster;
@@ -37,6 +38,9 @@ import androidx.media3.extractor.mp3.Mp3Extractor;
 import androidx.media3.extractor.mp4.FragmentedMp4Extractor;
 import androidx.media3.extractor.mp4.Mp4Extractor;
 import androidx.media3.extractor.ogg.OggExtractor;
+import androidx.media3.extractor.text.DefaultSubtitleParserFactory;
+import androidx.media3.extractor.text.SubtitleParser;
+import androidx.media3.extractor.text.SubtitleTranscodingExtractor;
 import androidx.media3.extractor.ts.Ac3Extractor;
 import androidx.media3.extractor.ts.Ac4Extractor;
 import androidx.media3.extractor.ts.AdtsExtractor;
@@ -133,10 +137,13 @@ public final class DefaultExtractorsFactory implements ExtractorsFactory {
   // TODO (b/261183220): Initialize tsSubtitleFormats in constructor once shrinking bug is fixed.
   @Nullable private ImmutableList<Format> tsSubtitleFormats;
   private int tsTimestampSearchBytes;
+  private boolean textTrackTranscodingEnabled;
+  private SubtitleParser.Factory subtitleParserFactory;
 
   public DefaultExtractorsFactory() {
     tsMode = TsExtractor.MODE_SINGLE_PMT;
     tsTimestampSearchBytes = TsExtractor.DEFAULT_TIMESTAMP_SEARCH_BYTES;
+    subtitleParserFactory = new DefaultSubtitleParserFactory();
   }
 
   /**
@@ -336,6 +343,40 @@ public final class DefaultExtractorsFactory implements ExtractorsFactory {
     return this;
   }
 
+  /**
+   * Enables transcoding of text track samples to {@link MimeTypes#TEXT_EXOPLAYER_CUES} before the
+   * data is emitted to {@link TrackOutput}.
+   *
+   * <p>Transcoding is disabled by default.
+   *
+   * @param textTrackTranscodingEnabled Whether to enable transcoding.
+   * @return The factory, for convenience.
+   */
+  // TODO: b/289916598 - Flip this to default to enabled and deprecate it.
+  @CanIgnoreReturnValue
+  public synchronized DefaultExtractorsFactory setTextTrackTranscodingEnabled(
+      boolean textTrackTranscodingEnabled) {
+    this.textTrackTranscodingEnabled = textTrackTranscodingEnabled;
+    return this;
+  }
+
+  /**
+   * Sets a {@link SubtitleParser.Factory} to use when transcoding text tracks.
+   *
+   * <p>This is only used if {@link #setTextTrackTranscodingEnabled(boolean)} is enabled.
+   *
+   * <p>The default value is {@link DefaultSubtitleParserFactory}.
+   *
+   * @param subtitleParserFactory The factory for {@link SubtitleParser} instances.
+   * @return The factory, for convenience.
+   */
+  @CanIgnoreReturnValue
+  public synchronized DefaultExtractorsFactory setSubtitleParserFactory(
+      SubtitleParser.Factory subtitleParserFactory) {
+    this.subtitleParserFactory = subtitleParserFactory;
+    return this;
+  }
+
   @Override
   public synchronized Extractor[] createExtractors() {
     return createExtractors(Uri.EMPTY, new HashMap<>());
@@ -364,8 +405,14 @@ public final class DefaultExtractorsFactory implements ExtractorsFactory {
         addExtractorsForFileType(fileType, extractors);
       }
     }
-
+    Extractor[] result = new Extractor[extractors.size()];
-    return extractors.toArray(new Extractor[extractors.size()]);
+    for (int i = 0; i < extractors.size(); i++) {
+      result[i] =
+          textTrackTranscodingEnabled
+              ? new SubtitleTranscodingExtractor(extractors.get(i), subtitleParserFactory)
+              : extractors.get(i);
+    }
+    return result;
   }
 
   private void addExtractorsForFileType(@FileTypes.Type int fileType, List<Extractor> extractors) {

libraries/extractor/src/main/java/androidx/media3/extractor/text/SubtitleTranscodingExtractor.java

@@ -0,0 +1,96 @@
+/*
+ * Copyright 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package androidx.media3.extractor.text;
+
+import androidx.media3.common.C;
+import androidx.media3.common.Format;
+import androidx.media3.common.MimeTypes;
+import androidx.media3.common.util.UnstableApi;
+import androidx.media3.extractor.Extractor;
+import androidx.media3.extractor.ExtractorInput;
+import androidx.media3.extractor.ExtractorOutput;
+import androidx.media3.extractor.PositionHolder;
+import androidx.media3.extractor.TrackOutput;
+import java.io.IOException;
+import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
+
+/**
+ * A wrapping {@link Extractor} that transcodes {@linkplain C#TRACK_TYPE_TEXT text samples} from
+ * supported subtitle formats to {@link MimeTypes#TEXT_EXOPLAYER_CUES}.
+ *
+ * <p>Samples emitted by the delegate {@link Extractor} to {@linkplain C#TRACK_TYPE_TEXT text
+ * tracks} with a supported subtitle format are transcoded and the resulting {@link
+ * MimeTypes#TEXT_EXOPLAYER_CUES} samples are emitted to the underlying {@link TrackOutput}.
+ *
+ * <p>Samples emitted by the delegate {@link Extractor} to non-text tracks (or text tracks with an
+ * unsupported format) are passed through to the underlying {@link TrackOutput} without
+ * modification.
+ *
+ * <p>Support for subtitle formats is determined by {@link
+ * SubtitleParser.Factory#supportsFormat(Format)} on the {@link SubtitleParser.Factory} passed to
+ * the constructor of this class.
+ */
+@UnstableApi
+public class SubtitleTranscodingExtractor implements Extractor {
+
+  private final Extractor delegate;
+  private final SubtitleParser.Factory subtitleParserFactory;
+
+  private @MonotonicNonNull SubtitleTranscodingExtractorOutput transcodingExtractorOutput;
+
+  public SubtitleTranscodingExtractor(
+      Extractor delegate, SubtitleParser.Factory subtitleParserFactory) {
+    this.delegate = delegate;
+    this.subtitleParserFactory = subtitleParserFactory;
+  }
+
+  @Override
+  public boolean sniff(ExtractorInput input) throws IOException {
+    return delegate.sniff(input);
+  }
+
+  @Override
+  public void init(ExtractorOutput output) {
+    transcodingExtractorOutput =
+        new SubtitleTranscodingExtractorOutput(output, subtitleParserFactory);
+    delegate.init(transcodingExtractorOutput);
+  }
+
+  @Override
+  public @ReadResult int read(ExtractorInput input, PositionHolder seekPosition)
+      throws IOException {
+    return delegate.read(input, seekPosition);
+  }
+
+  @Override
+  public void seek(long position, long timeUs) {
+    if (transcodingExtractorOutput != null) {
+      transcodingExtractorOutput.resetSubtitleParsers();
+    }
+    delegate.seek(position, timeUs);
+  }
+
+  @Override
+  public void release() {
+    delegate.release();
+  }
+
+  @Override
+  public Extractor getUnderlyingImplementation() {
+    return delegate;
+  }
+}

libraries/extractor/src/main/java/androidx/media3/extractor/text/SubtitleTranscodingExtractorOutput.java

@@ -0,0 +1,71 @@
+/*
+ * Copyright 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package androidx.media3.extractor.text;
+
+import android.util.SparseArray;
+import androidx.media3.common.C;
+import androidx.media3.extractor.ExtractorOutput;
+import androidx.media3.extractor.SeekMap;
+import androidx.media3.extractor.TrackOutput;
+
+/** A wrapping {@link ExtractorOutput} for use by {@link SubtitleTranscodingExtractor}. */
+/* package */ class SubtitleTranscodingExtractorOutput implements ExtractorOutput {
+
+  private final ExtractorOutput delegate;
+  private final SubtitleParser.Factory subtitleParserFactory;
+  private final SparseArray<SubtitleTranscodingTrackOutput> textTrackOutputs;
+
+  public SubtitleTranscodingExtractorOutput(
+      ExtractorOutput delegate, SubtitleParser.Factory subtitleParserFactory) {
+    this.delegate = delegate;
+    this.subtitleParserFactory = subtitleParserFactory;
+    textTrackOutputs = new SparseArray<>();
+  }
+
+  public void resetSubtitleParsers() {
+    for (int i = 0; i < textTrackOutputs.size(); i++) {
+      textTrackOutputs.valueAt(i).resetSubtitleParser();
+    }
+  }
+
+  // ExtractorOutput implementation
+
+  @Override
+  public TrackOutput track(int id, @C.TrackType int type) {
+    if (type != C.TRACK_TYPE_TEXT) {
+      return delegate.track(id, type);
+    }
+    SubtitleTranscodingTrackOutput existingTrackOutput = textTrackOutputs.get(id);
+    if (existingTrackOutput != null) {
+      return existingTrackOutput;
+    }
+    SubtitleTranscodingTrackOutput trackOutput =
+        new SubtitleTranscodingTrackOutput(delegate.track(id, type), subtitleParserFactory);
+    textTrackOutputs.put(id, trackOutput);
+    return trackOutput;
+  }
+
+  @Override
+  public void endTracks() {
+    delegate.endTracks();
+  }
+
+  @Override
+  public void seekMap(SeekMap seekMap) {
+    delegate.seekMap(seekMap);
+  }
+}

libraries/extractor/src/main/java/androidx/media3/extractor/text/SubtitleTranscodingTrackOutput.java

@@ -0,0 +1,202 @@
+/*
+ * Copyright 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package androidx.media3.extractor.text;
+
+import static androidx.media3.common.util.Assertions.checkArgument;
+import static androidx.media3.common.util.Assertions.checkNotNull;
+import static androidx.media3.common.util.Assertions.checkState;
+import static androidx.media3.common.util.Assertions.checkStateNotNull;
+import static java.lang.Math.max;
+
+import androidx.annotation.Nullable;
+import androidx.media3.common.C;
+import androidx.media3.common.DataReader;
+import androidx.media3.common.Format;
+import androidx.media3.common.MimeTypes;
+import androidx.media3.common.util.ParsableByteArray;
+import androidx.media3.common.util.Util;
+import androidx.media3.extractor.TrackOutput;
+import java.io.EOFException;
+import java.io.IOException;
+import java.util.List;
+import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
+
+/**
+ * A wrapping {@link TrackOutput} which transcodes from a source subtitle format like {@link
+ * MimeTypes#APPLICATION_SUBRIP} to ExoPlayer's internal binary cue representation ({@link
+ * MimeTypes#TEXT_EXOPLAYER_CUES}).
+ */
+/* package */ class SubtitleTranscodingTrackOutput implements TrackOutput {
+
+  private final TrackOutput delegate;
+  private final SubtitleParser.Factory subtitleParserFactory;
+  private final CueEncoder cueEncoder;
+  private final ParsableByteArray parsableScratch;
+
+  private int sampleDataStart;
+  private int sampleDataEnd;
+  private byte[] sampleData;
+  @Nullable private SubtitleParser currentSubtitleParser;
+  private @MonotonicNonNull Format currentFormat;
+
+  public SubtitleTranscodingTrackOutput(
+      TrackOutput delegate, SubtitleParser.Factory subtitleParserFactory) {
+    this.delegate = delegate;
+    this.subtitleParserFactory = subtitleParserFactory;
+    this.cueEncoder = new CueEncoder();
+    this.sampleDataStart = 0;
+    this.sampleDataEnd = 0;
+    this.sampleData = Util.EMPTY_BYTE_ARRAY;
+    this.parsableScratch = new ParsableByteArray();
+  }
+
+  public void resetSubtitleParser() {
+    if (currentSubtitleParser != null) {
+      currentSubtitleParser.reset();
+    }
+  }
+
+  // TrackOutput implementation
+
+  @Override
+  public void format(Format format) {
+    checkNotNull(format.sampleMimeType);
+    checkArgument(MimeTypes.getTrackType(format.sampleMimeType) == C.TRACK_TYPE_TEXT);
+    if (!format.equals(currentFormat)) {
+      currentFormat = format;
+      currentSubtitleParser =
+          subtitleParserFactory.supportsFormat(format)
+              ? subtitleParserFactory.create(format)
+              : null;
+    }
+    if (currentSubtitleParser == null) {
+      delegate.format(format);
+    } else {
+      delegate.format(
+          format
+              .buildUpon()
+              .setSampleMimeType(MimeTypes.TEXT_EXOPLAYER_CUES)
+              .setCodecs(format.sampleMimeType)
+              // Reset this value to the default. All non-default timestamp adjustments are done
+              // below in sampleMetadata() and there are no 'subsamples' after transcoding.
+              .setSubsampleOffsetUs(Format.OFFSET_SAMPLE_RELATIVE)
+              .build());
+    }
+  }
+
+  @Override
+  public int sampleData(
+      DataReader input, int length, boolean allowEndOfInput, @SampleDataPart int sampleDataPart)
+      throws IOException {
+    if (currentSubtitleParser == null) {
+      return delegate.sampleData(input, length, allowEndOfInput, sampleDataPart);
+    }
+    ensureSampleDataCapacity(length);
+    int bytesRead = input.read(sampleData, /* offset= */ sampleDataEnd, length);
+    if (bytesRead == C.RESULT_END_OF_INPUT) {
+      if (allowEndOfInput) {
+        return C.RESULT_END_OF_INPUT;
+      } else {
+        throw new EOFException();
+      }
+    } else {
+      sampleDataEnd += bytesRead;
+      return bytesRead;
+    }
+  }
+
+  @Override
+  public void sampleData(ParsableByteArray data, int length, @SampleDataPart int sampleDataPart) {
+    if (currentSubtitleParser == null) {
+      delegate.sampleData(data, length, sampleDataPart);
+      return;
+    }
+    ensureSampleDataCapacity(length);
+    data.readBytes(sampleData, /* offset= */ sampleDataEnd, length);
+    sampleDataEnd += length;
+  }
+
+  @Override
+  public void sampleMetadata(
+      long timeUs,
+      @C.BufferFlags int flags,
+      int size,
+      int offset,
+      @Nullable CryptoData cryptoData) {
+    if (currentSubtitleParser == null) {
+      delegate.sampleMetadata(timeUs, flags, size, offset, cryptoData);
+      return;
+    }
+    checkStateNotNull(currentFormat); // format() must be called before sampleMetadata()
+    checkArgument(cryptoData == null, "DRM on subtitles is not supported");
+
+    int sampleStart = sampleDataEnd - offset - size;
+    @Nullable
+    List<CuesWithTiming> cuesWithTimingList =
+        currentSubtitleParser.parse(sampleData, /* offset= */ sampleStart, /* length= */ size);
+    sampleDataStart = sampleStart + size;
+    if (cuesWithTimingList != null) {
+      for (int i = 0; i < cuesWithTimingList.size(); i++) {
+        CuesWithTiming cuesWithTiming = cuesWithTimingList.get(i);
+        byte[] cuesWithDurationBytes =
+            cueEncoder.encode(cuesWithTiming.cues, cuesWithTiming.durationUs);
+
+        parsableScratch.reset(cuesWithDurationBytes);
+        delegate.sampleData(parsableScratch, cuesWithDurationBytes.length);
+        // Clear FLAG_DECODE_ONLY if it is set.
+        flags &= ~C.BUFFER_FLAG_DECODE_ONLY;
+        long outputSampleTimeUs;
+        if (cuesWithTiming.startTimeUs == C.TIME_UNSET) {
+          checkState(currentFormat.subsampleOffsetUs == Format.OFFSET_SAMPLE_RELATIVE);
+          outputSampleTimeUs = timeUs;
+        } else if (currentFormat.subsampleOffsetUs == Format.OFFSET_SAMPLE_RELATIVE) {
+          outputSampleTimeUs = timeUs + cuesWithTiming.startTimeUs;
+        } else {
+          outputSampleTimeUs = cuesWithTiming.startTimeUs + currentFormat.subsampleOffsetUs;
+        }
+        delegate.sampleMetadata(
+            outputSampleTimeUs,
+            flags,
+            cuesWithDurationBytes.length,
+            /* offset= */ 0,
+            /* cryptoData= */ null);
+      }
+    }
+  }
+
+  /**
+   * Ensures that {@link #sampleData} has at least {@code newSampleSize} bytes available at the end
+   * (after {@link #sampleDataEnd}).
+   *
+   * <p>If there is not sufficient space, the target size is either twice the currently-used size,
+   * or just large enough to handle {@code newSampleSize} bytes if twice is not large enough. If
+   * {@link #sampleData} is already large enough to hold the new target size, we avoid allocating a
+   * new array and just copy bytes to the beginning of the existing array.
+   */
+  private void ensureSampleDataCapacity(int newSampleSize) {
+    if (sampleData.length - sampleDataEnd >= newSampleSize) {
+      return;
+    }
+    int existingSampleDataLength = sampleDataEnd - sampleDataStart;
+    int targetLength = max(existingSampleDataLength * 2, sampleDataEnd + newSampleSize);
+    byte[] newSampleData = targetLength <= sampleData.length ? sampleData : new byte[targetLength];
+    System.arraycopy(sampleData, sampleDataStart, newSampleData, 0, existingSampleDataLength);
+    sampleDataStart = 0;
+    sampleDataEnd = existingSampleDataLength;
+    sampleData = newSampleData;
+  }
+}

libraries/extractor/src/test/java/androidx/media3/extractor/DefaultExtractorsFactoryTest.java

@@ -15,6 +15,7 @@
  */
 package androidx.media3.extractor;
 
+import static androidx.media3.common.util.Assertions.checkState;
 import static com.google.common.truth.Truth.assertThat;
 
 import android.net.Uri;
@@ -29,6 +30,7 @@ import androidx.media3.extractor.mp3.Mp3Extractor;
 import androidx.media3.extractor.mp4.FragmentedMp4Extractor;
 import androidx.media3.extractor.mp4.Mp4Extractor;
 import androidx.media3.extractor.ogg.OggExtractor;
+import androidx.media3.extractor.text.SubtitleTranscodingExtractor;
 import androidx.media3.extractor.ts.Ac3Extractor;
 import androidx.media3.extractor.ts.Ac4Extractor;
 import androidx.media3.extractor.ts.AdtsExtractor;
@@ -54,7 +56,7 @@ public final class DefaultExtractorsFactoryTest {
 
     Extractor[] extractors = defaultExtractorsFactory.createExtractors();
 
-    List<Class<? extends Extractor>> extractorClasses = getExtractorClasses(extractors);
+    List<Class<? extends Extractor>> extractorClasses = getUnderlyingExtractorClasses(extractors);
     assertThat(extractorClasses.subList(0, 3))
         .containsExactly(FlvExtractor.class, FlacExtractor.class, WavExtractor.class)
         .inOrder();
@@ -85,7 +87,7 @@ public final class DefaultExtractorsFactoryTest {
 
     Extractor[] extractors = defaultExtractorsFactory.createExtractors(uri, responseHeaders);
 
-    List<Class<? extends Extractor>> extractorClasses = getExtractorClasses(extractors);
+    List<Class<? extends Extractor>> extractorClasses = getUnderlyingExtractorClasses(extractors);
     assertThat(extractorClasses.subList(0, 2))
         .containsExactly(Mp4Extractor.class, FragmentedMp4Extractor.class);
     assertThat(extractorClasses.get(2)).isEqualTo(Mp3Extractor.class);
@@ -100,7 +102,7 @@ public final class DefaultExtractorsFactoryTest {
 
     Extractor[] extractors = defaultExtractorsFactory.createExtractors(uri, responseHeaders);
 
-    List<Class<? extends Extractor>> extractorClasses = getExtractorClasses(extractors);
+    List<Class<? extends Extractor>> extractorClasses = getUnderlyingExtractorClasses(extractors);
     assertThat(extractorClasses.subList(3, extractors.length))
         .containsExactly(
             FlvExtractor.class,
@@ -119,10 +121,60 @@ public final class DefaultExtractorsFactoryTest {
         .inOrder();
   }
 
-  private static List<Class<? extends Extractor>> getExtractorClasses(Extractor[] extractors) {
+  @Test
+  public void subtitleTranscoding_notEnabledByDefault() {
+    DefaultExtractorsFactory defaultExtractorsFactory = new DefaultExtractorsFactory();
+
+    Extractor[] extractors = defaultExtractorsFactory.createExtractors();
+
+    for (Extractor extractor : extractors) {
+      assertThat(extractor.getClass()).isNotEqualTo(SubtitleTranscodingExtractor.class);
+    }
+  }
+
+  @Test
+  public void subtitleTranscoding_ifEnabled_wrapsExtractorsThatSupportMuxedSubtitles() {
+    DefaultExtractorsFactory defaultExtractorsFactory =
+        new DefaultExtractorsFactory().setTextTrackTranscodingEnabled(true);
+
+    Extractor[] extractors = defaultExtractorsFactory.createExtractors();
+
+    Extractor aviExtractor = null;
+    Extractor matroskaExtractor = null;
+    Extractor mp4Extractor = null;
+    Extractor fragmentedMp4Extractor = null;
+    Extractor tsExtractor = null;
+
+    for (Extractor extractor : extractors) {
+      if (extractor.getUnderlyingImplementation() instanceof AviExtractor) {
+        checkState(aviExtractor == null);
+        aviExtractor = extractor;
+      } else if (extractor.getUnderlyingImplementation() instanceof MatroskaExtractor) {
+        checkState(matroskaExtractor == null);
+        matroskaExtractor = extractor;
+      } else if (extractor.getUnderlyingImplementation() instanceof Mp4Extractor) {
+        checkState(mp4Extractor == null);
+        mp4Extractor = extractor;
+      } else if (extractor.getUnderlyingImplementation() instanceof FragmentedMp4Extractor) {
+        checkState(fragmentedMp4Extractor == null);
+        fragmentedMp4Extractor = extractor;
+      } else if (extractor.getUnderlyingImplementation() instanceof TsExtractor) {
+        checkState(tsExtractor == null);
+        tsExtractor = extractor;
+      }
+    }
+    assertThat(aviExtractor).isInstanceOf(SubtitleTranscodingExtractor.class);
+    assertThat(matroskaExtractor).isInstanceOf(SubtitleTranscodingExtractor.class);
+    assertThat(mp4Extractor).isInstanceOf(SubtitleTranscodingExtractor.class);
+    assertThat(fragmentedMp4Extractor).isInstanceOf(SubtitleTranscodingExtractor.class);
+    assertThat(tsExtractor).isInstanceOf(SubtitleTranscodingExtractor.class);
+  }
+
+  private static List<Class<? extends Extractor>> getUnderlyingExtractorClasses(
+      Extractor[] extractors) {
     List<Class<? extends Extractor>> extractorClasses = new ArrayList<>();
     for (Extractor extractor : extractors) {
-      extractorClasses.add(extractor.getClass());
+      extractorClasses.add(extractor.getUnderlyingImplementation().getClass());
     }
     return extractorClasses;
   }

libraries/extractor/src/test/java/androidx/media3/extractor/text/SubtitleTranscodingExtractorParameterizedTest.java

@@ -0,0 +1,91 @@
+/*
+ * Copyright 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package androidx.media3.extractor.text;
+
+import androidx.media3.extractor.Extractor;
+import androidx.media3.extractor.mkv.MatroskaExtractor;
+import androidx.media3.test.utils.ExtractorAsserts;
+import com.google.common.collect.ImmutableList;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.ParameterizedRobolectricTestRunner;
+
+/**
+ * Parameterized tests for {@link SubtitleTranscodingExtractor}.
+ *
+ * <p>Non-parameterized tests are in {@link SubtitleTranscodingExtractorTest}.
+ */
+@RunWith(ParameterizedRobolectricTestRunner.class)
+public class SubtitleTranscodingExtractorParameterizedTest {
+
+  @ParameterizedRobolectricTestRunner.Parameters(name = "{0}")
+  public static ImmutableList<ExtractorAsserts.SimulationConfig> params() {
+    return ExtractorAsserts.configs();
+  }
+
+  @ParameterizedRobolectricTestRunner.Parameter
+  public ExtractorAsserts.SimulationConfig simulationConfig;
+
+  @Test
+  public void sampleWithSrtInMkv() throws Exception {
+    ExtractorAsserts.assertBehavior(
+        () -> createWrappedMatroskaExtractor(),
+        "media/mkv/sample_with_srt.mkv",
+        new ExtractorAsserts.AssertionConfig.Builder()
+            .setDumpFilesPrefix("extractordumps/subtitle_transcoding/srt_in_mkv")
+            .build(),
+        simulationConfig);
+  }
+
+  @Test
+  public void sampleWithOverlappingSrtInMkv() throws Exception {
+    ExtractorAsserts.assertBehavior(
+        () -> createWrappedMatroskaExtractor(),
+        "media/mkv/sample_with_overlapping_srt.mkv",
+        new ExtractorAsserts.AssertionConfig.Builder()
+            .setDumpFilesPrefix("extractordumps/subtitle_transcoding/overlapping_srt_in_mkv")
+            .build(),
+        simulationConfig);
+  }
+
+  @Test
+  public void sampleWithSsaInMkv() throws Exception {
+    ExtractorAsserts.assertBehavior(
+        () -> createWrappedMatroskaExtractor(),
+        "media/mkv/sample_with_ssa_subtitles.mkv",
+        new ExtractorAsserts.AssertionConfig.Builder()
+            .setDumpFilesPrefix("extractordumps/subtitle_transcoding/ssa_in_mkv")
+            .build(),
+        simulationConfig);
+  }
+
+  @Test
+  public void sampleWithOverlappingSsaInMkv() throws Exception {
+    ExtractorAsserts.assertBehavior(
+        () -> createWrappedMatroskaExtractor(),
+        "media/mkv/sample_with_overlapping_ssa_subtitles.mkv",
+        new ExtractorAsserts.AssertionConfig.Builder()
+            .setDumpFilesPrefix("extractordumps/subtitle_transcoding/overlapping_ssa_in_mkv")
+            .build(),
+        simulationConfig);
+  }
+
+  private static Extractor createWrappedMatroskaExtractor() {
+    return new SubtitleTranscodingExtractor(
+        new MatroskaExtractor(), new DefaultSubtitleParserFactory());
+  }
+}

libraries/extractor/src/test/java/androidx/media3/extractor/text/SubtitleTranscodingExtractorTest.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package androidx.media3.extractor.text;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import androidx.media3.extractor.Extractor;
+import androidx.media3.extractor.mkv.MatroskaExtractor;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+/**
+ * Non-parameterized tests for {@link SubtitleTranscodingExtractor}.
+ *
+ * <p>Parameterized tests are in {@link SubtitleTranscodingExtractorParameterizedTest}.
+ */
+@RunWith(AndroidJUnit4.class)
+public class SubtitleTranscodingExtractorTest {
+
+  @Test
+  public void underlyingImplementationReturnsDelegate() {
+    Extractor matroskaExtractor = new MatroskaExtractor();
+    Extractor subtitleTranscodingExtractor =
+        new SubtitleTranscodingExtractor(matroskaExtractor, new DefaultSubtitleParserFactory());
+
+    assertThat(subtitleTranscodingExtractor.getUnderlyingImplementation())
+        .isSameInstanceAs(matroskaExtractor);
+  }
+}

libraries/test_data/src/test/assets/extractordumps/subtitle_transcoding/overlapping_srt_in_mkv.0.dump

@@ -0,0 +1,290 @@
+seekMap:
+  isSeekable = true
+  duration = 1072000
+  getPosition(0) = [[timeUs=67000, position=5679]]
+  getPosition(1) = [[timeUs=67000, position=5679]]
+  getPosition(536000) = [[timeUs=200000, position=5679]]
+  getPosition(1072000) = [[timeUs=200000, position=5679]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 67000
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 134000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 100000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 267000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 200000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 167000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 234000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 400000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 334000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 300000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 367000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 500000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 467000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 434000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 634000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 567000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 534000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 600000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 767000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 700000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 667000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 734000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 900000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 834000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 800000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 867000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 1034000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 967000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 934000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 1000000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = 1
+    language = und
+  sample 0:
+    time = 129000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 163829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 198659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 233489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 268319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 303149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 337979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 372809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 408000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 442829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 477659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 512489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 547319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 582149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 616979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 651809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 687000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 721829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 756659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 791489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 826319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 861149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 895979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 930809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 965000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 999829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 1034659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1069489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1104319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 3017
+  sample count = 3
+  format 0:
+    id = 3
+    sampleMimeType = text/x-exoplayer-cues
+    codecs = application/x-subrip
+    selectionFlags = 1
+    language = und
+  sample 0:
+    time = 100000
+    flags = 1
+    data = length 1002, hash 83D96DE7
+  sample 1:
+    time = 150000
+    flags = 1
+    data = length 1007, hash BFF2DCF4
+  sample 2:
+    time = 200000
+    flags = 1
+    data = length 1008, hash 2B5F6191
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/subtitle_transcoding/overlapping_srt_in_mkv.1.dump

@@ -0,0 +1,290 @@
+seekMap:
+  isSeekable = true
+  duration = 1072000
+  getPosition(0) = [[timeUs=67000, position=5679]]
+  getPosition(1) = [[timeUs=67000, position=5679]]
+  getPosition(536000) = [[timeUs=200000, position=5679]]
+  getPosition(1072000) = [[timeUs=200000, position=5679]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 67000
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 134000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 100000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 267000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 200000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 167000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 234000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 400000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 334000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 300000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 367000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 500000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 467000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 434000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 634000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 567000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 534000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 600000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 767000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 700000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 667000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 734000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 900000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 834000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 800000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 867000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 1034000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 967000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 934000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 1000000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = 1
+    language = und
+  sample 0:
+    time = 129000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 163829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 198659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 233489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 268319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 303149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 337979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 372809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 408000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 442829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 477659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 512489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 547319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 582149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 616979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 651809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 687000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 721829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 756659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 791489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 826319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 861149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 895979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 930809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 965000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 999829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 1034659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1069489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1104319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 3017
+  sample count = 3
+  format 0:
+    id = 3
+    sampleMimeType = text/x-exoplayer-cues
+    codecs = application/x-subrip
+    selectionFlags = 1
+    language = und
+  sample 0:
+    time = 100000
+    flags = 1
+    data = length 1002, hash 83D96DE7
+  sample 1:
+    time = 150000
+    flags = 1
+    data = length 1007, hash BFF2DCF4
+  sample 2:
+    time = 200000
+    flags = 1
+    data = length 1008, hash 2B5F6191
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/subtitle_transcoding/overlapping_srt_in_mkv.2.dump

@@ -0,0 +1,290 @@
+seekMap:
+  isSeekable = true
+  duration = 1072000
+  getPosition(0) = [[timeUs=67000, position=5679]]
+  getPosition(1) = [[timeUs=67000, position=5679]]
+  getPosition(536000) = [[timeUs=200000, position=5679]]
+  getPosition(1072000) = [[timeUs=200000, position=5679]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 67000
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 134000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 100000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 267000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 200000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 167000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 234000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 400000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 334000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 300000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 367000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 500000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 467000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 434000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 634000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 567000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 534000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 600000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 767000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 700000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 667000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 734000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 900000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 834000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 800000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 867000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 1034000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 967000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 934000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 1000000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = 1
+    language = und
+  sample 0:
+    time = 129000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 163829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 198659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 233489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 268319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 303149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 337979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 372809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 408000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 442829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 477659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 512489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 547319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 582149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 616979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 651809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 687000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 721829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 756659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 791489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 826319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 861149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 895979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 930809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 965000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 999829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 1034659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1069489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1104319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 3017
+  sample count = 3
+  format 0:
+    id = 3
+    sampleMimeType = text/x-exoplayer-cues
+    codecs = application/x-subrip
+    selectionFlags = 1
+    language = und
+  sample 0:
+    time = 100000
+    flags = 1
+    data = length 1002, hash 83D96DE7
+  sample 1:
+    time = 150000
+    flags = 1
+    data = length 1007, hash BFF2DCF4
+  sample 2:
+    time = 200000
+    flags = 1
+    data = length 1008, hash 2B5F6191
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/subtitle_transcoding/overlapping_srt_in_mkv.3.dump

@@ -0,0 +1,290 @@
+seekMap:
+  isSeekable = true
+  duration = 1072000
+  getPosition(0) = [[timeUs=67000, position=5679]]
+  getPosition(1) = [[timeUs=67000, position=5679]]
+  getPosition(536000) = [[timeUs=200000, position=5679]]
+  getPosition(1072000) = [[timeUs=200000, position=5679]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 67000
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 134000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 100000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 267000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 200000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 167000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 234000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 400000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 334000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 300000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 367000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 500000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 467000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 434000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 634000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 567000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 534000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 600000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 767000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 700000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 667000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 734000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 900000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 834000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 800000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 867000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 1034000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 967000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 934000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 1000000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = 1
+    language = und
+  sample 0:
+    time = 129000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 163829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 198659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 233489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 268319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 303149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 337979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 372809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 408000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 442829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 477659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 512489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 547319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 582149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 616979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 651809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 687000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 721829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 756659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 791489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 826319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 861149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 895979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 930809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 965000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 999829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 1034659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1069489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1104319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 3017
+  sample count = 3
+  format 0:
+    id = 3
+    sampleMimeType = text/x-exoplayer-cues
+    codecs = application/x-subrip
+    selectionFlags = 1
+    language = und
+  sample 0:
+    time = 100000
+    flags = 1
+    data = length 1002, hash 83D96DE7
+  sample 1:
+    time = 150000
+    flags = 1
+    data = length 1007, hash BFF2DCF4
+  sample 2:
+    time = 200000
+    flags = 1
+    data = length 1008, hash 2B5F6191
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/subtitle_transcoding/overlapping_srt_in_mkv.unknown_length.dump

@@ -0,0 +1,290 @@
+seekMap:
+  isSeekable = true
+  duration = 1072000
+  getPosition(0) = [[timeUs=67000, position=5679]]
+  getPosition(1) = [[timeUs=67000, position=5679]]
+  getPosition(536000) = [[timeUs=200000, position=5679]]
+  getPosition(1072000) = [[timeUs=200000, position=5679]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 67000
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 134000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 100000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 267000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 200000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 167000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 234000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 400000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 334000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 300000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 367000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 500000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 467000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 434000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 634000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 567000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 534000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 600000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 767000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 700000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 667000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 734000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 900000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 834000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 800000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 867000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 1034000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 967000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 934000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 1000000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = 1
+    language = und
+  sample 0:
+    time = 129000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 163829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 198659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 233489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 268319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 303149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 337979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 372809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 408000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 442829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 477659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 512489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 547319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 582149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 616979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 651809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 687000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 721829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 756659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 791489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 826319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 861149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 895979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 930809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 965000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 999829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 1034659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1069489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1104319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 3017
+  sample count = 3
+  format 0:
+    id = 3
+    sampleMimeType = text/x-exoplayer-cues
+    codecs = application/x-subrip
+    selectionFlags = 1
+    language = und
+  sample 0:
+    time = 100000
+    flags = 1
+    data = length 1002, hash 83D96DE7
+  sample 1:
+    time = 150000
+    flags = 1
+    data = length 1007, hash BFF2DCF4
+  sample 2:
+    time = 200000
+    flags = 1
+    data = length 1008, hash 2B5F6191
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/subtitle_transcoding/overlapping_ssa_in_mkv.0.dump

@@ -0,0 +1,305 @@
+seekMap:
+  isSeekable = true
+  duration = 1072000
+  getPosition(0) = [[timeUs=67000, position=5775]]
+  getPosition(1) = [[timeUs=67000, position=5775]]
+  getPosition(536000) = [[timeUs=200000, position=5775]]
+  getPosition(1072000) = [[timeUs=200000, position=5775]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 67000
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 134000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 100000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 267000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 200000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 167000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 234000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 400000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 334000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 300000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 367000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 500000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 467000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 434000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 634000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 567000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 534000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 600000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 767000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 700000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 667000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 734000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 900000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 834000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 800000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 867000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 1034000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 967000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 934000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 1000000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = 1
+    language = und
+  sample 0:
+    time = 129000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 163829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 198659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 233489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 268319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 303149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 337979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 372809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 408000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 442829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 477659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 512489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 547319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 582149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 616979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 651809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 687000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 721829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 756659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 791489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 826319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 861149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 895979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 930809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 965000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 999829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 1034659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1069489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1104319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 3746
+  sample count = 6
+  format 0:
+    id = 3
+    sampleMimeType = text/x-exoplayer-cues
+    codecs = text/x-ssa
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 90, hash A5E21974
+      data = length 93, hash 48D1F6B7
+  sample 0:
+    time = 100000
+    flags = 1
+    data = length 997, hash A1198858
+  sample 1:
+    time = 330000
+    flags = 1
+    data = length 248, hash FD751B3
+  sample 2:
+    time = 150000
+    flags = 1
+    data = length 1002, hash E686A781
+  sample 3:
+    time = 550000
+    flags = 1
+    data = length 248, hash FD751B3
+  sample 4:
+    time = 200000
+    flags = 1
+    data = length 1003, hash 27A316D2
+  sample 5:
+    time = 450000
+    flags = 1
+    data = length 248, hash FD751B3
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/subtitle_transcoding/overlapping_ssa_in_mkv.1.dump

@@ -0,0 +1,305 @@
+seekMap:
+  isSeekable = true
+  duration = 1072000
+  getPosition(0) = [[timeUs=67000, position=5775]]
+  getPosition(1) = [[timeUs=67000, position=5775]]
+  getPosition(536000) = [[timeUs=200000, position=5775]]
+  getPosition(1072000) = [[timeUs=200000, position=5775]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 67000
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 134000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 100000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 267000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 200000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 167000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 234000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 400000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 334000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 300000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 367000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 500000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 467000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 434000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 634000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 567000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 534000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 600000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 767000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 700000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 667000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 734000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 900000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 834000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 800000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 867000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 1034000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 967000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 934000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 1000000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = 1
+    language = und
+  sample 0:
+    time = 129000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 163829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 198659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 233489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 268319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 303149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 337979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 372809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 408000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 442829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 477659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 512489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 547319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 582149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 616979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 651809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 687000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 721829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 756659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 791489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 826319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 861149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 895979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 930809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 965000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 999829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 1034659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1069489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1104319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 3746
+  sample count = 6
+  format 0:
+    id = 3
+    sampleMimeType = text/x-exoplayer-cues
+    codecs = text/x-ssa
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 90, hash A5E21974
+      data = length 93, hash 48D1F6B7
+  sample 0:
+    time = 100000
+    flags = 1
+    data = length 997, hash A1198858
+  sample 1:
+    time = 330000
+    flags = 1
+    data = length 248, hash FD751B3
+  sample 2:
+    time = 150000
+    flags = 1
+    data = length 1002, hash E686A781
+  sample 3:
+    time = 550000
+    flags = 1
+    data = length 248, hash FD751B3
+  sample 4:
+    time = 200000
+    flags = 1
+    data = length 1003, hash 27A316D2
+  sample 5:
+    time = 450000
+    flags = 1
+    data = length 248, hash FD751B3
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/subtitle_transcoding/overlapping_ssa_in_mkv.2.dump

@@ -0,0 +1,305 @@
+seekMap:
+  isSeekable = true
+  duration = 1072000
+  getPosition(0) = [[timeUs=67000, position=5775]]
+  getPosition(1) = [[timeUs=67000, position=5775]]
+  getPosition(536000) = [[timeUs=200000, position=5775]]
+  getPosition(1072000) = [[timeUs=200000, position=5775]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 67000
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 134000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 100000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 267000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 200000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 167000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 234000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 400000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 334000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 300000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 367000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 500000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 467000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 434000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 634000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 567000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 534000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 600000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 767000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 700000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 667000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 734000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 900000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 834000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 800000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 867000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 1034000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 967000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 934000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 1000000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = 1
+    language = und
+  sample 0:
+    time = 129000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 163829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 198659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 233489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 268319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 303149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 337979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 372809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 408000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 442829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 477659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 512489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 547319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 582149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 616979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 651809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 687000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 721829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 756659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 791489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 826319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 861149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 895979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 930809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 965000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 999829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 1034659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1069489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1104319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 3746
+  sample count = 6
+  format 0:
+    id = 3
+    sampleMimeType = text/x-exoplayer-cues
+    codecs = text/x-ssa
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 90, hash A5E21974
+      data = length 93, hash 48D1F6B7
+  sample 0:
+    time = 100000
+    flags = 1
+    data = length 997, hash A1198858
+  sample 1:
+    time = 330000
+    flags = 1
+    data = length 248, hash FD751B3
+  sample 2:
+    time = 150000
+    flags = 1
+    data = length 1002, hash E686A781
+  sample 3:
+    time = 550000
+    flags = 1
+    data = length 248, hash FD751B3
+  sample 4:
+    time = 200000
+    flags = 1
+    data = length 1003, hash 27A316D2
+  sample 5:
+    time = 450000
+    flags = 1
+    data = length 248, hash FD751B3
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/subtitle_transcoding/overlapping_ssa_in_mkv.3.dump

@@ -0,0 +1,305 @@
+seekMap:
+  isSeekable = true
+  duration = 1072000
+  getPosition(0) = [[timeUs=67000, position=5775]]
+  getPosition(1) = [[timeUs=67000, position=5775]]
+  getPosition(536000) = [[timeUs=200000, position=5775]]
+  getPosition(1072000) = [[timeUs=200000, position=5775]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 67000
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 134000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 100000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 267000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 200000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 167000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 234000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 400000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 334000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 300000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 367000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 500000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 467000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 434000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 634000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 567000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 534000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 600000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 767000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 700000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 667000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 734000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 900000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 834000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 800000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 867000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 1034000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 967000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 934000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 1000000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = 1
+    language = und
+  sample 0:
+    time = 129000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 163829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 198659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 233489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 268319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 303149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 337979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 372809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 408000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 442829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 477659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 512489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 547319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 582149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 616979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 651809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 687000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 721829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 756659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 791489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 826319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 861149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 895979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 930809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 965000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 999829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 1034659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1069489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1104319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 3746
+  sample count = 6
+  format 0:
+    id = 3
+    sampleMimeType = text/x-exoplayer-cues
+    codecs = text/x-ssa
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 90, hash A5E21974
+      data = length 93, hash 48D1F6B7
+  sample 0:
+    time = 100000
+    flags = 1
+    data = length 997, hash A1198858
+  sample 1:
+    time = 330000
+    flags = 1
+    data = length 248, hash FD751B3
+  sample 2:
+    time = 150000
+    flags = 1
+    data = length 1002, hash E686A781
+  sample 3:
+    time = 550000
+    flags = 1
+    data = length 248, hash FD751B3
+  sample 4:
+    time = 200000
+    flags = 1
+    data = length 1003, hash 27A316D2
+  sample 5:
+    time = 450000
+    flags = 1
+    data = length 248, hash FD751B3
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/subtitle_transcoding/overlapping_ssa_in_mkv.unknown_length.dump

@@ -0,0 +1,305 @@
+seekMap:
+  isSeekable = true
+  duration = 1072000
+  getPosition(0) = [[timeUs=67000, position=5775]]
+  getPosition(1) = [[timeUs=67000, position=5775]]
+  getPosition(536000) = [[timeUs=200000, position=5775]]
+  getPosition(1072000) = [[timeUs=200000, position=5775]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 67000
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 134000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 100000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 267000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 200000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 167000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 234000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 400000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 334000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 300000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 367000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 500000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 467000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 434000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 634000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 567000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 534000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 600000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 767000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 700000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 667000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 734000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 900000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 834000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 800000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 867000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 1034000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 967000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 934000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 1000000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = 1
+    language = und
+  sample 0:
+    time = 129000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 163829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 198659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 233489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 268319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 303149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 337979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 372809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 408000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 442829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 477659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 512489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 547319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 582149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 616979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 651809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 687000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 721829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 756659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 791489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 826319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 861149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 895979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 930809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 965000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 999829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 1034659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1069489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1104319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 3746
+  sample count = 6
+  format 0:
+    id = 3
+    sampleMimeType = text/x-exoplayer-cues
+    codecs = text/x-ssa
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 90, hash A5E21974
+      data = length 93, hash 48D1F6B7
+  sample 0:
+    time = 100000
+    flags = 1
+    data = length 997, hash A1198858
+  sample 1:
+    time = 330000
+    flags = 1
+    data = length 248, hash FD751B3
+  sample 2:
+    time = 150000
+    flags = 1
+    data = length 1002, hash E686A781
+  sample 3:
+    time = 550000
+    flags = 1
+    data = length 248, hash FD751B3
+  sample 4:
+    time = 200000
+    flags = 1
+    data = length 1003, hash 27A316D2
+  sample 5:
+    time = 450000
+    flags = 1
+    data = length 248, hash FD751B3
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/subtitle_transcoding/srt_in_mkv.0.dump

@@ -0,0 +1,283 @@
+seekMap:
+  isSeekable = true
+  duration = 1234000
+  getPosition(0) = [[timeUs=0, position=1163]]
+  getPosition(1) = [[timeUs=0, position=1163]]
+  getPosition(617000) = [[timeUs=0, position=1163]]
+  getPosition(1234000) = [[timeUs=0, position=1163]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 67000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 33000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 200000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 133000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 100000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 167000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 333000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 267000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 233000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 300000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 433000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 400000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 367000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 567000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 500000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 467000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 533000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 700000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 633000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 600000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 667000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 833000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 767000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 733000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 800000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 967000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 900000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 867000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 933000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = 1
+    language = und
+  sample 0:
+    time = 62000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 97000
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 131000
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 166000
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 201000
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 236000
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 270000
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 306000
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 341000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 376000
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 410000
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 445000
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 480000
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 514000
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 550000
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 585000
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 620000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 654000
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 690000
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 724000
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 759000
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 793000
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 829000
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 864000
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 898000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 932000
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 968000
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1002000
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1037000
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 993
+  sample count = 1
+  format 0:
+    id = 3
+    sampleMimeType = text/x-exoplayer-cues
+    codecs = application/x-subrip
+    selectionFlags = 1
+    language = en
+    label = Subs Label
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 993, hash E926FD1E
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/subtitle_transcoding/srt_in_mkv.1.dump

@@ -0,0 +1,283 @@
+seekMap:
+  isSeekable = true
+  duration = 1234000
+  getPosition(0) = [[timeUs=0, position=1163]]
+  getPosition(1) = [[timeUs=0, position=1163]]
+  getPosition(617000) = [[timeUs=0, position=1163]]
+  getPosition(1234000) = [[timeUs=0, position=1163]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 67000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 33000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 200000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 133000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 100000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 167000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 333000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 267000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 233000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 300000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 433000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 400000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 367000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 567000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 500000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 467000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 533000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 700000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 633000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 600000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 667000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 833000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 767000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 733000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 800000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 967000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 900000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 867000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 933000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = 1
+    language = und
+  sample 0:
+    time = 62000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 97000
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 131000
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 166000
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 201000
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 236000
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 270000
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 306000
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 341000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 376000
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 410000
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 445000
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 480000
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 514000
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 550000
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 585000
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 620000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 654000
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 690000
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 724000
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 759000
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 793000
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 829000
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 864000
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 898000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 932000
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 968000
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1002000
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1037000
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 993
+  sample count = 1
+  format 0:
+    id = 3
+    sampleMimeType = text/x-exoplayer-cues
+    codecs = application/x-subrip
+    selectionFlags = 1
+    language = en
+    label = Subs Label
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 993, hash E926FD1E
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/subtitle_transcoding/srt_in_mkv.2.dump

@@ -0,0 +1,283 @@
+seekMap:
+  isSeekable = true
+  duration = 1234000
+  getPosition(0) = [[timeUs=0, position=1163]]
+  getPosition(1) = [[timeUs=0, position=1163]]
+  getPosition(617000) = [[timeUs=0, position=1163]]
+  getPosition(1234000) = [[timeUs=0, position=1163]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 67000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 33000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 200000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 133000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 100000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 167000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 333000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 267000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 233000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 300000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 433000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 400000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 367000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 567000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 500000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 467000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 533000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 700000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 633000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 600000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 667000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 833000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 767000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 733000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 800000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 967000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 900000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 867000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 933000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = 1
+    language = und
+  sample 0:
+    time = 62000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 97000
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 131000
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 166000
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 201000
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 236000
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 270000
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 306000
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 341000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 376000
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 410000
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 445000
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 480000
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 514000
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 550000
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 585000
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 620000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 654000
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 690000
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 724000
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 759000
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 793000
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 829000
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 864000
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 898000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 932000
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 968000
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1002000
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1037000
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 993
+  sample count = 1
+  format 0:
+    id = 3
+    sampleMimeType = text/x-exoplayer-cues
+    codecs = application/x-subrip
+    selectionFlags = 1
+    language = en
+    label = Subs Label
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 993, hash E926FD1E
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/subtitle_transcoding/srt_in_mkv.3.dump

@@ -0,0 +1,283 @@
+seekMap:
+  isSeekable = true
+  duration = 1234000
+  getPosition(0) = [[timeUs=0, position=1163]]
+  getPosition(1) = [[timeUs=0, position=1163]]
+  getPosition(617000) = [[timeUs=0, position=1163]]
+  getPosition(1234000) = [[timeUs=0, position=1163]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 67000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 33000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 200000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 133000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 100000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 167000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 333000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 267000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 233000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 300000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 433000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 400000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 367000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 567000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 500000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 467000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 533000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 700000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 633000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 600000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 667000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 833000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 767000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 733000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 800000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 967000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 900000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 867000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 933000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = 1
+    language = und
+  sample 0:
+    time = 62000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 97000
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 131000
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 166000
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 201000
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 236000
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 270000
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 306000
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 341000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 376000
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 410000
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 445000
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 480000
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 514000
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 550000
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 585000
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 620000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 654000
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 690000
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 724000
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 759000
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 793000
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 829000
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 864000
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 898000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 932000
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 968000
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1002000
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1037000
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 993
+  sample count = 1
+  format 0:
+    id = 3
+    sampleMimeType = text/x-exoplayer-cues
+    codecs = application/x-subrip
+    selectionFlags = 1
+    language = en
+    label = Subs Label
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 993, hash E926FD1E
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/subtitle_transcoding/srt_in_mkv.unknown_length.dump

@@ -0,0 +1,283 @@
+seekMap:
+  isSeekable = true
+  duration = 1234000
+  getPosition(0) = [[timeUs=0, position=1163]]
+  getPosition(1) = [[timeUs=0, position=1163]]
+  getPosition(617000) = [[timeUs=0, position=1163]]
+  getPosition(1234000) = [[timeUs=0, position=1163]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 67000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 33000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 200000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 133000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 100000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 167000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 333000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 267000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 233000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 300000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 433000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 400000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 367000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 567000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 500000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 467000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 533000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 700000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 633000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 600000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 667000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 833000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 767000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 733000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 800000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 967000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 900000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 867000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 933000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = 1
+    language = und
+  sample 0:
+    time = 62000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 97000
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 131000
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 166000
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 201000
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 236000
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 270000
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 306000
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 341000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 376000
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 410000
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 445000
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 480000
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 514000
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 550000
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 585000
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 620000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 654000
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 690000
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 724000
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 759000
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 793000
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 829000
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 864000
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 898000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 932000
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 968000
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1002000
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1037000
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 993
+  sample count = 1
+  format 0:
+    id = 3
+    sampleMimeType = text/x-exoplayer-cues
+    codecs = application/x-subrip
+    selectionFlags = 1
+    language = en
+    label = Subs Label
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 993, hash E926FD1E
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/subtitle_transcoding/ssa_in_mkv.0.dump

@@ -0,0 +1,289 @@
+seekMap:
+  isSeekable = true
+  duration = 1139000
+  getPosition(0) = [[timeUs=0, position=6106]]
+  getPosition(1) = [[timeUs=0, position=6106], [timeUs=67000, position=6106]]
+  getPosition(569500) = [[timeUs=67000, position=6106]]
+  getPosition(1139000) = [[timeUs=67000, position=6106]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 67000
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 134000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 100000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 267000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 200000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 167000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 234000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 400000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 334000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 300000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 367000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 500000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 467000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 434000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 634000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 567000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 534000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 600000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 767000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 700000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 667000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 734000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 900000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 834000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 800000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 867000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 1034000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 967000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 934000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 1000000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = 1
+    language = und
+  sample 0:
+    time = 129000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 163829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 198659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 233489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 268319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 303149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 337979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 372809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 408000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 442829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 477659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 512489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 547319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 582149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 616979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 651809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 687000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 721829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 756659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 791489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 826319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 861149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 895979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 930809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 965000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 999829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 1034659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1069489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1104319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 1528
+  sample count = 2
+  format 0:
+    id = 3
+    sampleMimeType = text/x-exoplayer-cues
+    codecs = text/x-ssa
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 90, hash A5E21974
+      data = length 470, hash 40E7D996
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 1280, hash EEF152A1
+  sample 1:
+    time = 500000
+    flags = 1
+    data = length 248, hash FD751B3
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/subtitle_transcoding/ssa_in_mkv.1.dump

@@ -0,0 +1,289 @@
+seekMap:
+  isSeekable = true
+  duration = 1139000
+  getPosition(0) = [[timeUs=0, position=6106]]
+  getPosition(1) = [[timeUs=0, position=6106], [timeUs=67000, position=6106]]
+  getPosition(569500) = [[timeUs=67000, position=6106]]
+  getPosition(1139000) = [[timeUs=67000, position=6106]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 67000
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 134000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 100000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 267000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 200000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 167000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 234000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 400000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 334000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 300000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 367000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 500000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 467000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 434000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 634000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 567000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 534000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 600000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 767000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 700000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 667000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 734000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 900000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 834000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 800000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 867000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 1034000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 967000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 934000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 1000000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = 1
+    language = und
+  sample 0:
+    time = 129000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 163829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 198659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 233489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 268319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 303149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 337979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 372809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 408000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 442829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 477659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 512489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 547319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 582149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 616979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 651809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 687000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 721829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 756659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 791489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 826319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 861149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 895979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 930809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 965000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 999829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 1034659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1069489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1104319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 1528
+  sample count = 2
+  format 0:
+    id = 3
+    sampleMimeType = text/x-exoplayer-cues
+    codecs = text/x-ssa
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 90, hash A5E21974
+      data = length 470, hash 40E7D996
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 1280, hash EEF152A1
+  sample 1:
+    time = 500000
+    flags = 1
+    data = length 248, hash FD751B3
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/subtitle_transcoding/ssa_in_mkv.2.dump

@@ -0,0 +1,289 @@
+seekMap:
+  isSeekable = true
+  duration = 1139000
+  getPosition(0) = [[timeUs=0, position=6106]]
+  getPosition(1) = [[timeUs=0, position=6106], [timeUs=67000, position=6106]]
+  getPosition(569500) = [[timeUs=67000, position=6106]]
+  getPosition(1139000) = [[timeUs=67000, position=6106]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 67000
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 134000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 100000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 267000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 200000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 167000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 234000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 400000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 334000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 300000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 367000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 500000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 467000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 434000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 634000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 567000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 534000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 600000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 767000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 700000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 667000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 734000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 900000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 834000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 800000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 867000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 1034000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 967000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 934000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 1000000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = 1
+    language = und
+  sample 0:
+    time = 129000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 163829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 198659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 233489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 268319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 303149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 337979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 372809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 408000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 442829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 477659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 512489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 547319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 582149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 616979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 651809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 687000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 721829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 756659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 791489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 826319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 861149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 895979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 930809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 965000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 999829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 1034659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1069489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1104319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 1528
+  sample count = 2
+  format 0:
+    id = 3
+    sampleMimeType = text/x-exoplayer-cues
+    codecs = text/x-ssa
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 90, hash A5E21974
+      data = length 470, hash 40E7D996
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 1280, hash EEF152A1
+  sample 1:
+    time = 500000
+    flags = 1
+    data = length 248, hash FD751B3
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/subtitle_transcoding/ssa_in_mkv.3.dump

@@ -0,0 +1,289 @@
+seekMap:
+  isSeekable = true
+  duration = 1139000
+  getPosition(0) = [[timeUs=0, position=6106]]
+  getPosition(1) = [[timeUs=0, position=6106], [timeUs=67000, position=6106]]
+  getPosition(569500) = [[timeUs=67000, position=6106]]
+  getPosition(1139000) = [[timeUs=67000, position=6106]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 67000
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 134000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 100000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 267000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 200000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 167000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 234000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 400000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 334000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 300000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 367000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 500000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 467000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 434000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 634000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 567000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 534000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 600000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 767000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 700000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 667000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 734000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 900000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 834000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 800000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 867000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 1034000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 967000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 934000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 1000000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = 1
+    language = und
+  sample 0:
+    time = 129000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 163829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 198659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 233489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 268319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 303149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 337979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 372809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 408000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 442829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 477659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 512489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 547319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 582149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 616979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 651809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 687000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 721829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 756659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 791489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 826319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 861149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 895979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 930809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 965000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 999829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 1034659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1069489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1104319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 1528
+  sample count = 2
+  format 0:
+    id = 3
+    sampleMimeType = text/x-exoplayer-cues
+    codecs = text/x-ssa
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 90, hash A5E21974
+      data = length 470, hash 40E7D996
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 1280, hash EEF152A1
+  sample 1:
+    time = 500000
+    flags = 1
+    data = length 248, hash FD751B3
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/subtitle_transcoding/ssa_in_mkv.unknown_length.dump

@@ -0,0 +1,289 @@
+seekMap:
+  isSeekable = true
+  duration = 1139000
+  getPosition(0) = [[timeUs=0, position=6106]]
+  getPosition(1) = [[timeUs=0, position=6106], [timeUs=67000, position=6106]]
+  getPosition(569500) = [[timeUs=67000, position=6106]]
+  getPosition(1139000) = [[timeUs=67000, position=6106]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 67000
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 134000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 100000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 267000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 200000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 167000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 234000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 400000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 334000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 300000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 367000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 500000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 467000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 434000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 634000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 567000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 534000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 600000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 767000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 700000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 667000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 734000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 900000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 834000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 800000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 867000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 1034000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 967000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 934000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 1000000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = 1
+    language = und
+  sample 0:
+    time = 129000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 163829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 198659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 233489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 268319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 303149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 337979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 372809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 408000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 442829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 477659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 512489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 547319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 582149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 616979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 651809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 687000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 721829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 756659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 791489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 826319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 861149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 895979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 930809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 965000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 999829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 1034659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1069489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1104319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 1528
+  sample count = 2
+  format 0:
+    id = 3
+    sampleMimeType = text/x-exoplayer-cues
+    codecs = text/x-ssa
+    selectionFlags = 1
+    language = und
+    initializationData:
+      data = length 90, hash A5E21974
+      data = length 470, hash 40E7D996
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 1280, hash EEF152A1
+  sample 1:
+    time = 500000
+    flags = 1
+    data = length 248, hash FD751B3
+tracksEnded = true

libraries/test_data/src/test/assets/playbackdumps/mkv/sample_with_null_terminated_srt.mkv.dump

@@ -522,3 +522,11 @@ AudioSink:
   buffer #28:
     time = 1000001037000
     data = 1
+TextOutput:
+  Subtitle[0]:
+    presentationTimeUs = 0
+    Cues = []
+  Subtitle[1]:
+    presentationTimeUs = 0
+    Cue[0]:
+      text = This is the first

libraries/test_data/src/test/assets/playbackdumps/mkv/sample_with_null_terminated_ssa_subtitles.mkv.dump

@@ -522,3 +522,20 @@ AudioSink:
   buffer #28:
     time = 1000001104319
     data = 1
+TextOutput:
+  Subtitle[0]:
+    presentationTimeUs = 0
+    Cues = []
+  Subtitle[1]:
+    presentationTimeUs = 0
+    Cue[0]:
+      text = This is the first
+      textAlignment = ALIGN_CENTER
+      line = 0.95
+      lineType = 0
+      lineAnchor = 2
+      position = 0.5
+      positionAnchor = 1
+  Subtitle[2]:
+    presentationTimeUs = 500000
+    Cues = []

libraries/test_data/src/test/assets/playbackdumps/mkv/sample_with_overlapping_srt.mkv.dump

@@ -522,3 +522,22 @@ AudioSink:
   buffer #28:
     time = 1000001104319
     data = 1
+TextOutput:
+  Subtitle[0]:
+    presentationTimeUs = 0
+    Cues = []
+  Subtitle[1]:
+    presentationTimeUs = 100000
+    Cue[0]:
+      text = First subtitle - end overlaps second
+  Subtitle[2]:
+    presentationTimeUs = 150000
+    Cue[0]:
+      text = Third subtitle - fully encompasses second
+  Subtitle[3]:
+    presentationTimeUs = 200000
+    Cue[0]:
+      text = Second subtitle - beginning overlaps first
+  Subtitle[4]:
+    presentationTimeUs = 450000
+    Cues = []

libraries/test_data/src/test/assets/playbackdumps/mkv/sample_with_overlapping_ssa_subtitles.mkv.dump

@@ -522,3 +522,29 @@ AudioSink:
   buffer #28:
     time = 1000001104319
     data = 1
+TextOutput:
+  Subtitle[0]:
+    presentationTimeUs = 0
+    Cues = []
+  Subtitle[1]:
+    presentationTimeUs = 100000
+    Cue[0]:
+      text = First subtitle - end overlaps second
+      lineType = 0
+  Subtitle[2]:
+    presentationTimeUs = 330000
+    Cues = []
+  Subtitle[3]:
+    presentationTimeUs = 150000
+    Cue[0]:
+      text = Third subtitle - fully encompasses second
+      lineType = 0
+  Subtitle[4]:
+    presentationTimeUs = 550000
+    Cues = []
+  Subtitle[5]:
+    presentationTimeUs = 450000
+    Cues = []
+  Subtitle[6]:
+    presentationTimeUs = 450000
+    Cues = []

libraries/test_data/src/test/assets/playbackdumps/mkv/sample_with_srt.mkv.dump

@@ -522,3 +522,11 @@ AudioSink:
   buffer #28:
     time = 1000001037000
     data = 1
+TextOutput:
+  Subtitle[0]:
+    presentationTimeUs = 0
+    Cues = []
+  Subtitle[1]:
+    presentationTimeUs = 0
+    Cue[0]:
+      text = This is the first subtitle.

libraries/test_data/src/test/assets/playbackdumps/mkv/sample_with_ssa_subtitles.mkv.dump

@@ -522,3 +522,20 @@ AudioSink:
   buffer #28:
     time = 1000001104319
     data = 1
+TextOutput:
+  Subtitle[0]:
+    presentationTimeUs = 0
+    Cues = []
+  Subtitle[1]:
+    presentationTimeUs = 0
+    Cue[0]:
+      text = This is the first subtitle.
+      textAlignment = ALIGN_CENTER
+      line = 0.95
+      lineType = 0
+      lineAnchor = 2
+      position = 0.5
+      positionAnchor = 1
+  Subtitle[2]:
+    presentationTimeUs = 500000
+    Cues = []