Add an option to force a silent audio track.

PiperOrigin-RevId: 492154544

Add an option to force a silent audio track.
PiperOrigin-RevId: 492154544
32bed828 · samrobinson · Ian Baker · 90d4fdcf · 32bed828 · 32bed828
Commit 32bed828 authored Dec 01, 2022 by samrobinson Committed by Ian Baker Dec 12, 2022
Showing with 744 additions and 5 deletions
library/transformer/src/main/java/com/google/android/exoplayer2/transformer/AudioTranscodingSamplePipeline.java
library/transformer/src/main/java/com/google/android/exoplayer2/transformer/SilentAudioGenerator.java
library/transformer/src/main/java/com/google/android/exoplayer2/transformer/Transformer.java
library/transformer/src/main/java/com/google/android/exoplayer2/transformer/TransformerInternal.java
library/transformer/src/test/java/com/google/android/exoplayer2/transformer/SilentAudioGeneratorTest.java
library/transformer/src/test/java/com/google/android/exoplayer2/transformer/TransformerEndToEndTest.java
testdata/src/test/assets/transformerdumps/mp4/sample.mp4.silentaudio.dump
--- a/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/AudioTranscodingSamplePipeline.java
+++ b/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/AudioTranscodingSamplePipeline.java
@@ -41,6 +41,7 @@ import org.checkerframework.dataflow.qual.Pure;
  private static final int DEFAULT_ENCODER_BITRATE = 128 * 1024;
+  @Nullable private final SilentAudioGenerator silentAudioGenerator;
  private final DecoderInputBuffer inputBuffer;
  private final AudioProcessingPipeline audioProcessingPipeline;
  private final Codec encoder;
@@ -52,12 +53,14 @@ import org.checkerframework.dataflow.qual.Pure;
  private long nextEncoderInputBufferTimeUs;
  private long encoderBufferDurationRemainder;
+  // TODO(b/260618558): Move silent audio generation upstream of this component.
  public AudioTranscodingSamplePipeline(
      Format inputFormat,
      long streamStartPositionUs,
      long streamOffsetUs,
      TransformationRequest transformationRequest,
      ImmutableList<AudioProcessor> audioProcessors,
+      long forceSilentAudioDurationUs,
      Codec.EncoderFactory encoderFactory,
      MuxerWrapper muxerWrapper,
      Listener listener,
@@ -71,6 +74,16 @@ import org.checkerframework.dataflow.qual.Pure;
        muxerWrapper,
        listener);
+    if (forceSilentAudioDurationUs != C.TIME_UNSET) {
+      silentAudioGenerator =
+          new SilentAudioGenerator(
+              forceSilentAudioDurationUs,
+              inputFormat.sampleRate,
+              Util.getPcmFrameSize(C.ENCODING_PCM_16BIT, inputFormat.channelCount));
+    } else {
+      silentAudioGenerator = null;
+    }
    inputBuffer = new DecoderInputBuffer(BUFFER_REPLACEMENT_MODE_DISABLED);
    encoderInputBuffer = new DecoderInputBuffer(BUFFER_REPLACEMENT_MODE_DISABLED);
    encoderOutputBuffer = new DecoderInputBuffer(BUFFER_REPLACEMENT_MODE_DISABLED);
@@ -160,11 +173,17 @@ import org.checkerframework.dataflow.qual.Pure;
  @Override
  protected boolean processDataUpToMuxer() throws TransformationException {
-    if (audioProcessingPipeline.isOperational()) {
+    if (!audioProcessingPipeline.isOperational()) {
-      return feedEncoderFromProcessingPipeline() || feedProcessingPipelineFromInput();
+      return silentAudioGenerator == null ? feedEncoderFromInput() : feedEncoderFromSilence();
-    } else {
-      return feedEncoderFromInput();
    }
+    if (feedEncoderFromProcessingPipeline()) {
+      return true;
+    }
+    return silentAudioGenerator == null
+        ? feedProcessingPipelineFromInput()
+        : feedProcessingPipelineFromSilence();
  }
  @Override
@@ -269,6 +288,45 @@ import org.checkerframework.dataflow.qual.Pure;
  }
  /**
+   * Attempts to pass silent audio to the encoder.
+   *
+   * @return Whether it may be possible to feed more data immediately by calling this method again.
+   */
+  private boolean feedEncoderFromSilence() throws TransformationException {
+    checkNotNull(silentAudioGenerator);
+    if (!encoder.maybeDequeueInputBuffer(encoderInputBuffer)) {
+      return false;
+    }
+    if (silentAudioGenerator.isEnded()) {
+      queueEndOfStreamToEncoder();
+      return false;
+    }
+    ByteBuffer silence = silentAudioGenerator.getBuffer();
+    feedEncoder(silence);
+    return true;
+  }
+  /**
+   * Attempts to feed silent audio to the {@link AudioProcessingPipeline}.
+   *
+   * @return Whether it may be possible to feed more data immediately by calling this method again.
+   */
+  private boolean feedProcessingPipelineFromSilence() {
+    checkNotNull(silentAudioGenerator);
+    if (silentAudioGenerator.isEnded()) {
+      audioProcessingPipeline.queueEndOfStream();
+      return false;
+    }
+    checkState(!audioProcessingPipeline.isEnded());
+    ByteBuffer silence = silentAudioGenerator.getBuffer();
+    audioProcessingPipeline.queueInput(silence);
+    return !silence.hasRemaining();
+  }
+  /**
   * Feeds as much data as possible between the current position and limit of the specified {@link
   * ByteBuffer} to the encoder, and advances its position by the number of bytes fed.
   */

--- a/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/SilentAudioGenerator.java
+++ b/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/SilentAudioGenerator.java
+/*
+ * Copyright 2022 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
+ *
+ *      http://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 com.google.android.exoplayer2.transformer;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+/* package */ final class SilentAudioGenerator {
+  private static final int DEFAULT_BUFFER_SIZE = 4096;
+  private final ByteBuffer internalBuffer;
+  private long remainingBytesToOutput;
+  public SilentAudioGenerator(long totalDurationUs, long sampleRate, int frameSize) {
+    remainingBytesToOutput = (sampleRate * frameSize * totalDurationUs) / 1_000_000L;
+    internalBuffer = ByteBuffer.allocate(DEFAULT_BUFFER_SIZE).order(ByteOrder.nativeOrder());
+    internalBuffer.flip();
+  }
+  public ByteBuffer getBuffer() {
+    if (!internalBuffer.hasRemaining()) {
+      // "next" buffer.
+      internalBuffer.clear();
+      if (remainingBytesToOutput < internalBuffer.capacity()) {
+        internalBuffer.limit((int) remainingBytesToOutput);
+      }
+      // Only reduce remaining bytes when we "generate" a new one.
+      remainingBytesToOutput -= internalBuffer.remaining();
+    }
+    return internalBuffer;
+  }
+  public boolean isEnded() {
+    return !internalBuffer.hasRemaining() && remainingBytesToOutput == 0;
+  }
+}
--- a/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/Transformer.java
+++ b/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/Transformer.java
@@ -30,6 +30,7 @@ import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.ExoPlayerLibraryInfo;
 import com.google.android.exoplayer2.MediaItem;
 import com.google.android.exoplayer2.audio.AudioProcessor;
+import com.google.android.exoplayer2.audio.SonicAudioProcessor;
 import com.google.android.exoplayer2.effect.GlEffect;
 import com.google.android.exoplayer2.effect.GlEffectsFrameProcessor;
 import com.google.android.exoplayer2.effect.GlMatrixTransformation;
@@ -86,6 +87,7 @@ public final class Transformer {
    private ImmutableList<Effect> videoEffects;
    private boolean removeAudio;
    private boolean removeVideo;
+    private boolean forceSilentAudio;
    private ListenerSet<Transformer.Listener> listeners;
    private MediaSource.@MonotonicNonNull Factory mediaSourceFactory;
    private Codec.DecoderFactory decoderFactory;
@@ -124,6 +126,7 @@ public final class Transformer {
      this.videoEffects = transformer.videoEffects;
      this.removeAudio = transformer.removeAudio;
      this.removeVideo = transformer.removeVideo;
+      this.forceSilentAudio = transformer.forceSilentAudio;
      this.listeners = transformer.listeners;
      this.mediaSourceFactory = transformer.mediaSourceFactory;
      this.decoderFactory = transformer.decoderFactory;
@@ -415,6 +418,33 @@ public final class Transformer {
    }
    /**
+     * Sets whether to force silent audio for the output file, ignoring any existing audio.
+     *
+     * <p>This method is experimental and may be removed or changed without warning.
+     *
+     * <p>Audio properties/format:
+     *
+     * <ul>
+     *   <li>Duration will match duration of the input media.
+     *   <li>Sample mime type will match {@link TransformationRequest#audioMimeType}, or {@link
+     *       MimeTypes#AUDIO_AAC} if {@code null}.
+     *   <li>Sample rate will be 44100hz. This can be modified by passing a {@link
+     *       SonicAudioProcessor} to {@link #setAudioProcessors(List)}, using {@link
+     *       SonicAudioProcessor#setOutputSampleRateHz(int)}.
+     *   <li>Channel count will be 2. This can be modified by implementing a custom {@link
+     *       AudioProcessor} and passing it to {@link #setAudioProcessors(List)}.
+     * </ul>
+     *
+     * @param forceSilentAudio Whether to output silent audio for the output file.
+     * @return This builder.
+     */
+    @CanIgnoreReturnValue
+    public Builder experimentalSetForceSilentAudio(boolean forceSilentAudio) {
+      this.forceSilentAudio = forceSilentAudio;
+      return this;
+    }
+    /**
     * Builds a {@link Transformer} instance.
     *
     * @throws IllegalStateException If both audio and video have been removed (otherwise the output
@@ -443,6 +473,7 @@ public final class Transformer {
          videoEffects,
          removeAudio,
          removeVideo,
+          forceSilentAudio,
          listeners,
          mediaSourceFactory,
          decoderFactory,
@@ -555,6 +586,7 @@ public final class Transformer {
  private final ImmutableList<Effect> videoEffects;
  private final boolean removeAudio;
  private final boolean removeVideo;
+  private final boolean forceSilentAudio;
  private final ListenerSet<Transformer.Listener> listeners;
  private final MediaSource.Factory mediaSourceFactory;
  private final FrameProcessor.Factory frameProcessorFactory;
@@ -572,7 +604,8 @@ public final class Transformer {
      ImmutableList<Effect> videoEffects,
      boolean removeAudio,
      boolean removeVideo,
-      ListenerSet<Transformer.Listener> listeners,
+      boolean forceSilentAudio,
+      ListenerSet<Listener> listeners,
      MediaSource.Factory mediaSourceFactory,
      Codec.DecoderFactory decoderFactory,
      Codec.EncoderFactory encoderFactory,
@@ -581,6 +614,10 @@ public final class Transformer {
      Looper looper,
      DebugViewProvider debugViewProvider,
      Clock clock) {
+    if (forceSilentAudio) {
+      removeAudio = true;
+    }
+    checkState(!removeVideo || !forceSilentAudio, "Silent only audio track needs a video track.");
    checkState(!removeAudio || !removeVideo, "Audio and video cannot both be removed.");
    this.context = context;
    this.transformationRequest = transformationRequest;
@@ -588,6 +625,7 @@ public final class Transformer {
    this.videoEffects = videoEffects;
    this.removeAudio = removeAudio;
    this.removeVideo = removeVideo;
+    this.forceSilentAudio = forceSilentAudio;
    this.listeners = listeners;
    this.mediaSourceFactory = mediaSourceFactory;
    this.decoderFactory = decoderFactory;
@@ -726,6 +764,7 @@ public final class Transformer {
            videoEffects,
            removeAudio,
            removeVideo,
+            forceSilentAudio,
            mediaSourceFactory,
            decoderFactory,
            encoderFactory,

--- a/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/TransformerInternal.java
+++ b/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/TransformerInternal.java
@@ -97,6 +97,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
  private final TransformationRequest transformationRequest;
  private final ImmutableList<AudioProcessor> audioProcessors;
  private final ImmutableList<Effect> videoEffects;
+  private final boolean forceSilentAudio;
  private final Codec.DecoderFactory decoderFactory;
  private final Codec.EncoderFactory encoderFactory;
  private final FrameProcessor.Factory frameProcessorFactory;
@@ -114,6 +115,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
  @Nullable private DecoderInputBuffer pendingInputBuffer;
  private boolean isDrainingPipelines;
+  private int silentSamplePipelineIndex;
  private @Transformer.ProgressState int progressState;
  private long progressPositionMs;
  private long durationUs;
@@ -131,6 +133,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
      ImmutableList<Effect> videoEffects,
      boolean removeAudio,
      boolean removeVideo,
+      boolean forceSilentAudio,
      MediaSource.Factory mediaSourceFactory,
      Codec.DecoderFactory decoderFactory,
      Codec.EncoderFactory encoderFactory,
@@ -145,6 +148,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
    this.transformationRequest = transformationRequest;
    this.audioProcessors = audioProcessors;
    this.videoEffects = videoEffects;
+    this.forceSilentAudio = forceSilentAudio;
    this.decoderFactory = decoderFactory;
    this.encoderFactory = encoderFactory;
    this.frameProcessorFactory = frameProcessorFactory;
@@ -168,6 +172,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
            componentListener,
            clock);
    samplePipelines = new ArrayList<>();
+    silentSamplePipelineIndex = C.INDEX_UNSET;
    dequeueBufferConditionVariable = new ConditionVariable();
    muxerWrapper =
        new MuxerWrapper(
@@ -258,6 +263,10 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
    while (samplePipeline.processData()) {}
    pendingInputBuffer = samplePipeline.dequeueInputBuffer();
    dequeueBufferConditionVariable.open();
+    if (forceSilentAudio) {
+      while (samplePipelines.get(silentSamplePipelineIndex).processData()) {}
+    }
  }
  private void queueInputInternal(int samplePipelineIndex) throws TransformationException {
@@ -391,6 +400,11 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
      trackRegistered = true;
      muxerWrapper.registerTrack();
      fallbackListener.registerTrack();
+      if (forceSilentAudio) {
+        muxerWrapper.registerTrack();
+        fallbackListener.registerTrack();
+      }
    }
    @Override
@@ -410,6 +424,23 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
      int samplePipelineIndex = tracksAddedCount;
      tracksAddedCount++;
+      if (forceSilentAudio) {
+        Format silentAudioFormat =
+            new Format.Builder()
+                .setSampleMimeType(MimeTypes.AUDIO_AAC)
+                .setSampleRate(44100)
+                .setChannelCount(2)
+                .build();
+        SamplePipeline audioSamplePipeline =
+            getSamplePipeline(silentAudioFormat, streamStartPositionUs, streamOffsetUs);
+        internalHandler
+            .obtainMessage(MSG_REGISTER_SAMPLE_PIPELINE, audioSamplePipeline)
+            .sendToTarget();
+        silentSamplePipelineIndex = tracksAddedCount;
+        tracksAddedCount++;
+      }
      return new SamplePipelineInput(samplePipelineIndex, samplePipeline.expectsDecodedData());
    }
@@ -459,6 +490,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
            streamOffsetUs,
            transformationRequest,
            audioProcessors,
+            forceSilentAudio ? durationUs : C.TIME_UNSET,
            encoderFactory,
            muxerWrapper,
            /* listener= */ this,
@@ -509,6 +541,10 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
      if (!audioProcessors.isEmpty()) {
        return true;
      }
+      if (forceSilentAudio) {
+        return true;
+      }
      return false;
    }

--- a/library/transformer/src/test/java/com/google/android/exoplayer2/transformer/SilentAudioGeneratorTest.java
+++ b/library/transformer/src/test/java/com/google/android/exoplayer2/transformer/SilentAudioGeneratorTest.java
+/*
+ * Copyright 2022 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
+ *
+ *      http://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 com.google.android.exoplayer2.transformer;
+import static com.google.common.truth.Truth.assertThat;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import java.nio.ByteBuffer;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+/** Unit tests for {@link SilentAudioGenerator}. */
+@RunWith(AndroidJUnit4.class)
+public class SilentAudioGeneratorTest {
+  @Test
+  public void numberOfBytesProduced_isCorrect() {
+    SilentAudioGenerator generator =
+        new SilentAudioGenerator(
+            /* totalDurationUs= */ 3_000_000, /* sampleRate= */ 88_200, /* frameSize= */ 12);
+    int bytesOutput = 0;
+    while (!generator.isEnded()) {
+      ByteBuffer output = generator.getBuffer();
+      bytesOutput += output.remaining();
+      // "Consume" buffer.
+      output.position(output.limit());
+    }
+    // 88_200 * 12 * 3s = 3175200
+    assertThat(bytesOutput).isEqualTo(3_175_200);
+  }
+  @Test
+  public void lastBufferProduced_isCorrectSize() {
+    SilentAudioGenerator generator =
+        new SilentAudioGenerator(
+            /* totalDurationUs= */ 1_000_000, /* sampleRate= */ 44_100, /* frameSize= */ 4);
+    int currentBufferSize = 0;
+    while (!generator.isEnded()) {
+      ByteBuffer output = generator.getBuffer();
+      currentBufferSize = output.remaining();
+      // "Consume" buffer.
+      output.position(output.limit());
+    }
+    // Last buffer is smaller and only outputs the 'leftover' bytes.
+    // (44_100 * 4) % 4096 = 272
+    assertThat(currentBufferSize).isEqualTo(272);
+  }
+  @Test
+  public void totalBytesLowerThanDefaultBufferSize_smallBufferProduced() {
+    SilentAudioGenerator generator =
+        new SilentAudioGenerator(
+            /* totalDurationUs= */ 5_000, /* sampleRate= */ 48_000, /* frameSize= */ 4);
+    // 5_000 * 48_000 * 4 / 1_000_000 = 960
+    assertThat(generator.getBuffer().remaining()).isEqualTo(960);
+  }
+}
--- a/library/transformer/src/test/java/com/google/android/exoplayer2/transformer/TransformerEndToEndTest.java
+++ b/library/transformer/src/test/java/com/google/android/exoplayer2/transformer/TransformerEndToEndTest.java
@@ -266,6 +266,21 @@ public final class TransformerEndToEndTest {
  }
  @Test
+  public void startTransformation_silentAudio_completesSuccessfully() throws Exception {
+    Transformer transformer =
+        createTransformerBuilder(/* enableFallback= */ false)
+            .experimentalSetForceSilentAudio(true)
+            .build();
+    MediaItem mediaItem = MediaItem.fromUri(ASSET_URI_PREFIX + FILE_AUDIO_VIDEO);
+    transformer.startTransformation(mediaItem, outputPath);
+    TransformerTestRunner.runUntilCompleted(transformer);
+    DumpFileAsserts.assertOutput(
+        context, testMuxer, getDumpFileName(FILE_AUDIO_VIDEO + ".silentaudio"));
+  }
+  @Test
  public void startTransformation_withMultipleListeners_callsEachOnCompletion() throws Exception {
    Transformer.Listener mockListener1 = mock(Transformer.Listener.class);
    Transformer.Listener mockListener2 = mock(Transformer.Listener.class);

--- a/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.silentaudio.dump
+++ b/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.silentaudio.dump
+format 0:
+  id = 1
+  sampleMimeType = video/avc
+  codecs = avc1.64001F
+  maxInputSize = 36722
+  width = 1080
+  height = 720
+  frameRate = 29.970028
+  initializationData:
+    data = length 29, hash 4746B5D9
+    data = length 10, hash 7A0D0F2B
+format 1:
+  sampleMimeType = audio/mp4a-latm
+  channelCount = 2
+  sampleRate = 44100
+  pcmEncoding = 2
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
+  presentationTimeUs = 0
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
+  presentationTimeUs = 23220
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
+  presentationTimeUs = 46440
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
+  presentationTimeUs = 69660
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
+  presentationTimeUs = 92880
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
+  presentationTimeUs = 116100
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
+  presentationTimeUs = 139320
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
+  presentationTimeUs = 162540
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
+  presentationTimeUs = 185760
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
+  presentationTimeUs = 208980
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
+  presentationTimeUs = 232200
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
+  presentationTimeUs = 255420
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
+  presentationTimeUs = 278640
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
+  presentationTimeUs = 301860
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
+  presentationTimeUs = 325080
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
+  presentationTimeUs = 348300
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
+  presentationTimeUs = 371520
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
+  presentationTimeUs = 394740
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
+  presentationTimeUs = 417960
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
+  presentationTimeUs = 441180
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
+  presentationTimeUs = 464400
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
+  presentationTimeUs = 487620
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
+  presentationTimeUs = 510840
+sample:
+  trackIndex = 0
+  dataHashCode = -770308242
+  size = 36692
+  isKeyFrame = true
+  presentationTimeUs = 0
+sample:
+  trackIndex = 0
+  dataHashCode = -732087136
+  size = 5312
+  isKeyFrame = false
+  presentationTimeUs = 66733
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
+  presentationTimeUs = 534059
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
+  presentationTimeUs = 557279
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
+  presentationTimeUs = 580499
+sample:
+  trackIndex = 0
+  dataHashCode = 468156717
+  size = 599
+  isKeyFrame = false
+  presentationTimeUs = 33366
+sample:
+  trackIndex = 0
+  dataHashCode = 1150349584
+  size = 7735
+  isKeyFrame = false
+  presentationTimeUs = 200200
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
+  presentationTimeUs = 603719
+sample:
+  trackIndex = 1
+  dataHashCode = 1742602241
+  size = 4096
+  isKeyFrame = true
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