diff --git a/libraries/muxer/src/main/java/androidx/media3/muxer/Mp4Muxer.java b/libraries/muxer/src/main/java/androidx/media3/muxer/Mp4Muxer.java
index a3fe966ce7..cedcf15108 100644
--- a/libraries/muxer/src/main/java/androidx/media3/muxer/Mp4Muxer.java
+++ b/libraries/muxer/src/main/java/androidx/media3/muxer/Mp4Muxer.java
@@ -39,7 +39,6 @@ import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
 import java.nio.ByteBuffer;
-import java.nio.channels.FileChannel;
 
 /**
  * A muxer for creating an MP4 container file.
@@ -181,7 +180,6 @@ public final class Mp4Muxer implements Muxer {
   private static final String TAG = "Mp4Muxer";
 
   private final FileOutputStream fileOutputStream;
-  private final FileChannel fileChannel;
   private final MetadataCollector metadataCollector;
   private final Mp4Writer mp4Writer;
 
@@ -192,13 +190,12 @@ public final class Mp4Muxer implements Muxer {
       boolean sampleCopyEnabled,
       boolean attemptStreamableOutputEnabled) {
     this.fileOutputStream = fileOutputStream;
-    this.fileChannel = fileOutputStream.getChannel();
     metadataCollector = new MetadataCollector();
     Mp4MoovStructure moovStructure =
         new Mp4MoovStructure(metadataCollector, lastFrameDurationBehavior);
     mp4Writer =
         new Mp4Writer(
-            fileChannel,
+            fileOutputStream.getChannel(),
             moovStructure,
             annexBToAvccConverter,
             sampleCopyEnabled,
@@ -302,15 +299,6 @@ public final class Mp4Muxer implements Muxer {
     } catch (IOException e) {
       exception = new MuxerException("Failed to finish writing samples", e);
     }
-    try {
-      fileChannel.close();
-    } catch (IOException e) {
-      if (exception == null) {
-        exception = new MuxerException("Failed to close output channel", e);
-      } else {
-        Log.e(TAG, "Failed to close output channel", e);
-      }
-    }
     try {
       fileOutputStream.close();
     } catch (IOException e) {