diff --git a/extensions/vp9/src/main/java/com/google/android/exoplayer/ext/vp9/LibvpxVideoTrackRenderer.java b/extensions/vp9/src/main/java/com/google/android/exoplayer/ext/vp9/LibvpxVideoTrackRenderer.java
index af900643d6..e50d81c144 100644
--- a/extensions/vp9/src/main/java/com/google/android/exoplayer/ext/vp9/LibvpxVideoTrackRenderer.java
+++ b/extensions/vp9/src/main/java/com/google/android/exoplayer/ext/vp9/LibvpxVideoTrackRenderer.java
@@ -355,7 +355,7 @@ public final class LibvpxVideoTrackRenderer extends SampleSourceTrackRenderer {
 
   @Override
   protected boolean isReady() {
-    return format != null && sourceIsReady;
+    return format != null && (sourceIsReady || outputBuffer != null);
   }
 
   @Override