Add support for passing creation time via InAppMuxer

PiperOrigin-RevId: 538175466 (cherry picked from commit 6dc8e060c958a2f36dd8d7d1b2f67585082a2a22)

Add support for passing creation time via InAppMuxer
PiperOrigin-RevId: 538175466 (cherry picked from commit 6dc8e060c958a2f36dd8d7d1b2f67585082a2a22)
bbd7bd8d · sheenachhabra · Tofunmi Adigun-Hameed · df80690e · bbd7bd8d · bbd7bd8d
Commit bbd7bd8d authored Jun 06, 2023 by sheenachhabra Committed by Tofunmi Adigun-Hameed Jun 06, 2023
Showing with 324 additions and 73 deletions
library/container/src/main/java/com/google/android/exoplayer2/container/CreationTime.java
library/core/src/test/java/com/google/android/exoplayer2/MetadataRetrieverTest.java
library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/AtomParsers.java
library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/Mp4Extractor.java
library/muxer/src/androidTest/java/com/google/android/exoplayer2/muxer/Mp4MuxerEndToEndTest.java
library/muxer/src/main/java/com/google/android/exoplayer2/muxer/Boxes.java
library/muxer/src/main/java/com/google/android/exoplayer2/muxer/Mp4Muxer.java
library/muxer/src/test/java/com/google/android/exoplayer2/muxer/Mp4MuxerEndToEndTest.java
library/muxer/src/test/java/com/google/android/exoplayer2/muxer/Mp4MuxerMetadataTest.java
library/transformer/src/main/java/com/google/android/exoplayer2/transformer/InAppMuxer.java
library/transformer/src/test/java/com/google/android/exoplayer2/transformer/TransformerWithInAppMuxerEndToEndTest.java
testdata/src/test/assets/extractordumps/jpeg/pixel-motion-photo-jfif-segment-shortened.jpg.0.dump
testdata/src/test/assets/extractordumps/jpeg/pixel-motion-photo-jfif-segment-shortened.jpg.1.dump
testdata/src/test/assets/extractordumps/jpeg/pixel-motion-photo-jfif-segment-shortened.jpg.2.dump
testdata/src/test/assets/extractordumps/jpeg/pixel-motion-photo-jfif-segment-shortened.jpg.3.dump
testdata/src/test/assets/extractordumps/mp4/sample.mp4.0.dump
testdata/src/test/assets/extractordumps/mp4/sample.mp4.1.dump
testdata/src/test/assets/extractordumps/mp4/sample.mp4.2.dump
testdata/src/test/assets/extractordumps/mp4/sample.mp4.3.dump
testdata/src/test/assets/extractordumps/mp4/sample.mp4.unknown_length.dump
--- a/library/container/src/main/java/com/google/android/exoplayer2/container/CreationTime.java
+++ b/library/container/src/main/java/com/google/android/exoplayer2/container/CreationTime.java
+/*
+ * 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
+ *
+ *      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.container;
+import android.os.Parcel;
+import android.os.Parcelable;
+import androidx.annotation.Nullable;
+import com.google.android.exoplayer2.metadata.Metadata;
+import com.google.common.primitives.Longs;
+/** Stores creation time. */
+public final class CreationTime implements Metadata.Entry {
+  public final long timestampMs;
+  /**
+   * Creates an instance.
+   *
+   * @param timestampMs The creation time UTC in milliseconds since the Unix epoch.
+   */
+  public CreationTime(long timestampMs) {
+    this.timestampMs = timestampMs;
+  }
+  private CreationTime(Parcel in) {
+    this.timestampMs = in.readLong();
+  }
+  @Override
+  public boolean equals(@Nullable Object obj) {
+    if (this == obj) {
+      return true;
+    }
+    if (!(obj instanceof CreationTime)) {
+      return false;
+    }
+    return timestampMs == ((CreationTime) obj).timestampMs;
+  }
+  @Override
+  public int hashCode() {
+    return Longs.hashCode(timestampMs);
+  }
+  @Override
+  public String toString() {
+    long unsetCreationTime = -2_082_844_800_000L;
+    return "Creation time: " + (timestampMs == unsetCreationTime ? "unset" : timestampMs);
+  }
+  // Parcelable implementation.
+  @Override
+  public int describeContents() {
+    return 0;
+  }
+  @Override
+  public void writeToParcel(Parcel dest, int flags) {
+    dest.writeLong(timestampMs);
+  }
+  public static final Parcelable.Creator<CreationTime> CREATOR =
+      new Parcelable.Creator<CreationTime>() {
+        @Override
+        public CreationTime createFromParcel(Parcel in) {
+          return new CreationTime(in);
+        }
+        @Override
+        public CreationTime[] newArray(int size) {
+          return new CreationTime[size];
+        }
+      };
+}
--- a/library/core/src/test/java/com/google/android/exoplayer2/MetadataRetrieverTest.java
+++ b/library/core/src/test/java/com/google/android/exoplayer2/MetadataRetrieverTest.java
@@ -25,6 +25,7 @@ import android.content.Context;
 import android.net.Uri;
 import androidx.test.core.app.ApplicationProvider;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
+import com.google.android.exoplayer2.container.CreationTime;
 import com.google.android.exoplayer2.metadata.mp4.MdtaMetadataEntry;
 import com.google.android.exoplayer2.metadata.mp4.MotionPhotoMetadata;
 import com.google.android.exoplayer2.metadata.mp4.SlowMotionData;
@@ -160,6 +161,7 @@ public class MetadataRetrieverTest {
        new SlowMotionData.Segment(
            /* startTimeMs= */ 1255, /* endTimeMs= */ 1970, /* speedDivisor= */ 8));
    SlowMotionData expectedSlowMotionData = new SlowMotionData(segments);
+    CreationTime expectedCreationTime = new CreationTime(/* timestampMs= */ 1604060090000L);
    MdtaMetadataEntry expectedMdtaEntry =
        new MdtaMetadataEntry(
            KEY_ANDROID_CAPTURE_FPS,
@@ -174,14 +176,17 @@ public class MetadataRetrieverTest {
    assertThat(trackGroups.length).isEqualTo(2); // Video and audio
    // Audio
-    assertThat(trackGroups.get(0).getFormat(0).metadata.length()).isEqualTo(2);
+    assertThat(trackGroups.get(0).getFormat(0).metadata.length()).isEqualTo(3);
    assertThat(trackGroups.get(0).getFormat(0).metadata.get(0)).isEqualTo(expectedSmtaEntry);
    assertThat(trackGroups.get(0).getFormat(0).metadata.get(1)).isEqualTo(expectedSlowMotionData);
+    assertThat(trackGroups.get(0).getFormat(0).metadata.get(2)).isEqualTo(expectedCreationTime);
    // Video
-    assertThat(trackGroups.get(1).getFormat(0).metadata.length()).isEqualTo(3);
+    assertThat(trackGroups.get(1).getFormat(0).metadata.length()).isEqualTo(4);
    assertThat(trackGroups.get(1).getFormat(0).metadata.get(0)).isEqualTo(expectedMdtaEntry);
    assertThat(trackGroups.get(1).getFormat(0).metadata.get(1)).isEqualTo(expectedSmtaEntry);
    assertThat(trackGroups.get(1).getFormat(0).metadata.get(2)).isEqualTo(expectedSlowMotionData);
+    assertThat(trackGroups.get(1).getFormat(0).metadata.get(3)).isEqualTo(expectedCreationTime);
  }
  @Test

--- a/library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/AtomParsers.java
+++ b/library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/AtomParsers.java
@@ -29,6 +29,7 @@ import com.google.android.exoplayer2.audio.AacUtil;
 import com.google.android.exoplayer2.audio.Ac3Util;
 import com.google.android.exoplayer2.audio.Ac4Util;
 import com.google.android.exoplayer2.audio.OpusUtil;
+import com.google.android.exoplayer2.container.CreationTime;
 import com.google.android.exoplayer2.container.Mp4LocationData;
 import com.google.android.exoplayer2.drm.DrmInitData;
 import com.google.android.exoplayer2.extractor.ExtractorUtil;
@@ -79,6 +80,19 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
    }
  }
+  /** Stores data retrieved from the mvhd atom. */
+  public static final class MvhdInfo {
+    /** The metadata. */
+    public final Metadata metadata;
+    /** The movie timescale. */
+    public final long timescale;
+    public MvhdInfo(Metadata metadata, long timescale) {
+      this.metadata = metadata;
+      this.timescale = timescale;
+    }
+  }
  private static final String TAG = "AtomParsers";
  @SuppressWarnings("ConstantCaseForConstants")
@@ -206,6 +220,35 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
  }
  /**
+   * Parses a mvhd atom (defined in ISO/IEC 14496-12), returning the timescale for the movie.
+   *
+   * @param mvhd Contents of the mvhd atom to be parsed.
+   * @return An object containing the parsed data.
+   */
+  public static MvhdInfo parseMvhd(ParsableByteArray mvhd) {
+    mvhd.setPosition(Atom.HEADER_SIZE);
+    int fullAtom = mvhd.readInt();
+    int version = Atom.parseFullAtomVersion(fullAtom);
+    long creationTimestampSeconds;
+    if (version == 0) {
+      creationTimestampSeconds = mvhd.readUnsignedInt();
+      mvhd.skipBytes(4); // modification_time
+    } else {
+      creationTimestampSeconds = mvhd.readLong();
+      mvhd.skipBytes(8); // modification_time
+    }
+    // Convert creation time from MP4 format to Unix epoch timestamp in Ms.
+    // Time delta between January 1, 1904 (MP4 format) and January 1, 1970 (Unix epoch).
+    // Includes leap year.
+    int timeDeltaSeconds = (66 * 365 + 17) * (24 * 60 * 60);
+    long unixTimestampMs = (creationTimestampSeconds - timeDeltaSeconds) * 1000;
+    long timescale = mvhd.readUnsignedInt();
+    return new MvhdInfo(new Metadata(new CreationTime(unixTimestampMs)), timescale);
+  }
+  /**
   * Parses a metadata meta atom if it contains metadata with handler 'mdta'.
   *
   * @param meta The metadata atom to decode.
@@ -318,7 +361,7 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
    if (duration == C.TIME_UNSET) {
      duration = tkhdData.duration;
    }
-    long movieTimescale = parseMvhd(mvhd.data);
+    long movieTimescale = parseMvhd(mvhd.data).timescale;
    long durationUs;
    if (duration == C.TIME_UNSET) {
      durationUs = C.TIME_UNSET;
@@ -836,22 +879,9 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
  }
  /**
-   * Parses a mvhd atom (defined in ISO/IEC 14496-12), returning the timescale for the movie.
-   *
-   * @param mvhd Contents of the mvhd atom to be parsed.
-   * @return Timescale for the movie.
-   */
-  private static long parseMvhd(ParsableByteArray mvhd) {
-    mvhd.setPosition(Atom.HEADER_SIZE);
-    int fullAtom = mvhd.readInt();
-    int version = Atom.parseFullAtomVersion(fullAtom);
-    mvhd.skipBytes(version == 0 ? 8 : 16);
-    return mvhd.readUnsignedInt();
-  }
-  /**
   * Parses a tkhd atom (defined in ISO/IEC 14496-12).
   *
+   * @param tkhd Contents of the tkhd atom to be parsed.
   * @return An object containing the parsed data.
   */
  private static TkhdData parseTkhd(ParsableByteArray tkhd) {

--- a/library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/Mp4Extractor.java
+++ b/library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/Mp4Extractor.java
@@ -18,6 +18,7 @@ package com.google.android.exoplayer2.extractor.mp4;
 import static com.google.android.exoplayer2.extractor.mp4.AtomParsers.parseTraks;
 import static com.google.android.exoplayer2.extractor.mp4.Sniffer.BRAND_HEIC;
 import static com.google.android.exoplayer2.extractor.mp4.Sniffer.BRAND_QUICKTIME;
+import static com.google.android.exoplayer2.util.Assertions.checkNotNull;
 import static com.google.android.exoplayer2.util.Util.castNonNull;
 import static java.lang.Math.max;
 import static java.lang.Math.min;
@@ -509,6 +510,9 @@ public final class Mp4Extractor implements Extractor, SeekMap {
      mdtaMetadata = AtomParsers.parseMdtaFromMeta(meta);
    }
+    Metadata mvhdMetadata =
+        AtomParsers.parseMvhd(checkNotNull(moov.getLeafAtomOfType(Atom.TYPE_mvhd)).data).metadata;
    boolean ignoreEditLists = (flags & FLAG_WORKAROUND_IGNORE_EDIT_LISTS) != 0;
    List<TrackSampleTable> trackSampleTables =
        parseTraks(
@@ -560,7 +564,8 @@ public final class Mp4Extractor implements Extractor, SeekMap {
          formatBuilder,
          smtaMetadata,
          slowMotionMetadataEntries.isEmpty() ? null : new Metadata(slowMotionMetadataEntries),
-          xyzMetadata);
+          xyzMetadata,
+          mvhdMetadata);
      mp4Track.trackOutput.format(formatBuilder.build());
      if (track.type == C.TRACK_TYPE_VIDEO && firstVideoTrackIndex == C.INDEX_UNSET) {

--- a/library/muxer/src/androidTest/java/com/google/android/exoplayer2/muxer/Mp4MuxerEndToEndTest.java
+++ b/library/muxer/src/androidTest/java/com/google/android/exoplayer2/muxer/Mp4MuxerEndToEndTest.java
@@ -81,6 +81,7 @@ public class Mp4MuxerEndToEndTest {
    try {
      mp4Muxer = new Mp4Muxer.Builder(outputStream).build();
+      mp4Muxer.setModificationTime(/* timestampMs= */ 500_000_000L);
      feedInputDataToMuxer(mp4Muxer, inputFile);
    } finally {
      if (mp4Muxer != null) {
@@ -97,6 +98,7 @@ public class Mp4MuxerEndToEndTest {
  @Test
  public void createMp4File_muxerNotClosed_createsPartiallyWrittenValidFile() throws IOException {
    Mp4Muxer mp4Muxer = new Mp4Muxer.Builder(outputStream).build();
+    mp4Muxer.setModificationTime(/* timestampMs= */ 500_000_000L);
    feedInputDataToMuxer(mp4Muxer, H265_HDR10_MP4);
    // Muxer not closed.

--- a/library/muxer/src/main/java/com/google/android/exoplayer2/muxer/Boxes.java
+++ b/library/muxer/src/main/java/com/google/android/exoplayer2/muxer/Boxes.java
@@ -1101,11 +1101,14 @@ import java.util.Locale;
    return BoxUtils.wrapIntoBox("esds", contents);
  }
-  /** Convert UNIX timestamps to the format used by MP4 files. */
+  /** Convert Unix epoch timestamps to the format used by MP4 files. */
  private static int toMp4Time(long unixTimeMs) {
-    // Jan 1, 1904, including leap years.
+    // Time delta between January 1, 1904 (MP4 format) and January 1, 1970 (Unix epoch).
-    long delta = (66 * 365 + 17) * (24 * 60 * 60);
+    // Includes leap year.
-    return (int) (unixTimeMs / 1000L + delta);
+    long timeDeltaSeconds = (66 * 365 + 17) * (24 * 60 * 60);
+    // The returned value is a positive (when read as unsigned) integer.
+    return (int) (unixTimeMs / 1000L + timeDeltaSeconds);
  }
  /** Packs a three-letter language code into a short, packing 3x5 bits. */

--- a/library/muxer/src/main/java/com/google/android/exoplayer2/muxer/Mp4Muxer.java
+++ b/library/muxer/src/main/java/com/google/android/exoplayer2/muxer/Mp4Muxer.java
@@ -189,10 +189,10 @@ public final class Mp4Muxer {
  /**
   * Sets the file modification time.
   *
-   * @param modificationDateUnixMs The modification time, in milliseconds since epoch.
+   * @param timestampMs The modification time UTC in milliseconds since the Unix epoch.
   */
-  public void setModificationTime(long modificationDateUnixMs) {
+  public void setModificationTime(long timestampMs) {
-    metadataCollector.setModificationTime(modificationDateUnixMs);
+    metadataCollector.setModificationTime(timestampMs);
  }
  /**

--- a/library/muxer/src/test/java/com/google/android/exoplayer2/muxer/Mp4MuxerEndToEndTest.java
+++ b/library/muxer/src/test/java/com/google/android/exoplayer2/muxer/Mp4MuxerEndToEndTest.java
@@ -74,6 +74,7 @@ public class Mp4MuxerEndToEndTest {
  public void createMp4File_withSameTracksOffset_matchesExpected() throws IOException {
    Context context = ApplicationProvider.getApplicationContext();
    Mp4Muxer mp4Muxer = new Mp4Muxer.Builder(outputFileStream).build();
+    mp4Muxer.setModificationTime(/* timestampMs= */ 500_000_000L);
    Pair<ByteBuffer, BufferInfo> track1Sample1 =
        MuxerTestUtil.getFakeSampleAndSampleInfo(/* presentationTimeUs= */ 100L);
@@ -115,6 +116,7 @@ public class Mp4MuxerEndToEndTest {
  public void createMp4File_withDifferentTracksOffset_matchesExpected() throws IOException {
    Context context = ApplicationProvider.getApplicationContext();
    Mp4Muxer mp4Muxer = new Mp4Muxer.Builder(outputFileStream).build();
+    mp4Muxer.setModificationTime(/* timestampMs= */ 500_000_000L);
    Pair<ByteBuffer, BufferInfo> track1Sample1 =
        MuxerTestUtil.getFakeSampleAndSampleInfo(/* presentationTimeUs= */ 0L);

--- a/library/muxer/src/test/java/com/google/android/exoplayer2/muxer/Mp4MuxerMetadataTest.java
+++ b/library/muxer/src/test/java/com/google/android/exoplayer2/muxer/Mp4MuxerMetadataTest.java
@@ -65,7 +65,7 @@ public class Mp4MuxerMetadataTest {
    Mp4Muxer muxer = new Mp4Muxer.Builder(outputFileStream).build();
    try {
-      muxer.setModificationTime(5000000);
+      muxer.setModificationTime(/* timestampMs= */ 5_000_000L);
      TrackToken token = muxer.addTrack(/* sortKey= */ 0, format);
      muxer.writeSampleData(token, sampleAndSampleInfo.first, sampleAndSampleInfo.second);
    } finally {
@@ -86,7 +86,7 @@ public class Mp4MuxerMetadataTest {
    Mp4Muxer muxer = new Mp4Muxer.Builder(outputFileStream).build();
    try {
-      muxer.setModificationTime(5000000);
+      muxer.setModificationTime(/* timestampMs= */ 5_000_000L);
      TrackToken token = muxer.addTrack(/* sortKey= */ 0, format);
      muxer.writeSampleData(token, sampleAndSampleInfo.first, sampleAndSampleInfo.second);
@@ -109,7 +109,7 @@ public class Mp4MuxerMetadataTest {
    Mp4Muxer muxer = new Mp4Muxer.Builder(outputFileStream).build();
    try {
-      muxer.setModificationTime(5000000);
+      muxer.setModificationTime(/* timestampMs= */ 5_000_000L);
      TrackToken token = muxer.addTrack(/* sortKey= */ 0, format);
      muxer.writeSampleData(token, sampleAndSampleInfo.first, sampleAndSampleInfo.second);
@@ -132,7 +132,7 @@ public class Mp4MuxerMetadataTest {
    Mp4Muxer muxer = new Mp4Muxer.Builder(outputFileStream).build();
    try {
-      muxer.setModificationTime(5000000);
+      muxer.setModificationTime(/* timestampMs= */ 5_000_000L);
      TrackToken token = muxer.addTrack(/* sortKey= */ 0, format);
      muxer.writeSampleData(token, sampleAndSampleInfo.first, sampleAndSampleInfo.second);
@@ -155,7 +155,7 @@ public class Mp4MuxerMetadataTest {
    Mp4Muxer muxer = new Mp4Muxer.Builder(outputFileStream).build();
    try {
-      muxer.setModificationTime(5000000);
+      muxer.setModificationTime(/* timestampMs= */ 5_000_000L);
      TrackToken token = muxer.addTrack(/* sortKey= */ 0, format);
      muxer.writeSampleData(token, sampleAndSampleInfo.first, sampleAndSampleInfo.second);
      muxer.setLocation(33.0f, -120f);
@@ -177,7 +177,7 @@ public class Mp4MuxerMetadataTest {
    Mp4Muxer muxer = new Mp4Muxer.Builder(outputFileStream).build();
    try {
-      muxer.setModificationTime(5000000);
+      muxer.setModificationTime(/* timestampMs= */ 5_000_000L);
      TrackToken token = muxer.addTrack(/* sortKey= */ 0, format);
      muxer.writeSampleData(token, sampleAndSampleInfo.first, sampleAndSampleInfo.second);
    } finally {
@@ -198,7 +198,7 @@ public class Mp4MuxerMetadataTest {
    Mp4Muxer muxer = new Mp4Muxer.Builder(outputFileStream).build();
    try {
-      muxer.setModificationTime(5000000);
+      muxer.setModificationTime(/* timestampMs= */ 5_000_000L);
      muxer.setCaptureFps(120.0f);
      TrackToken token = muxer.addTrack(/* sortKey= */ 0, format);
      muxer.writeSampleData(token, sampleAndSampleInfo.first, sampleAndSampleInfo.second);
@@ -220,7 +220,7 @@ public class Mp4MuxerMetadataTest {
    Mp4Muxer muxer = new Mp4Muxer.Builder(outputFileStream).build();
    try {
-      muxer.setModificationTime(5000000);
+      muxer.setModificationTime(/* timestampMs= */ 5_000_000L);
      muxer.addMetadata("SomeStringKey", "Some Random String");
      TrackToken token = muxer.addTrack(/* sortKey= */ 0, format);
      muxer.writeSampleData(token, sampleAndSampleInfo.first, sampleAndSampleInfo.second);
@@ -244,7 +244,7 @@ public class Mp4MuxerMetadataTest {
    Mp4Muxer muxer = new Mp4Muxer.Builder(outputFileStream).build();
    try {
-      muxer.setModificationTime(5000000);
+      muxer.setModificationTime(/* timestampMs= */ 5_000_000L);
      muxer.addMetadata("SomeStringKey", 10.0f);
      TrackToken token = muxer.addTrack(/* sortKey= */ 0, format);
      muxer.writeSampleData(token, sampleAndSampleInfo.first, sampleAndSampleInfo.second);
@@ -266,7 +266,7 @@ public class Mp4MuxerMetadataTest {
    Mp4Muxer muxer = new Mp4Muxer.Builder(outputFileStream).build();
    try {
-      muxer.setModificationTime(5000000);
+      muxer.setModificationTime(/* timestampMs= */ 5_000_000L);
      Context context = ApplicationProvider.getApplicationContext();
      byte[] xmpBytes = TestUtil.getByteArray(context, XMP_SAMPLE_DATA);
      ByteBuffer xmp = ByteBuffer.wrap(xmpBytes);

--- a/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/InAppMuxer.java
+++ b/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/InAppMuxer.java
@@ -21,6 +21,7 @@ import static com.google.android.exoplayer2.muxer.Mp4Muxer.SUPPORTED_VIDEO_SAMPL
 import android.media.MediaCodec.BufferInfo;
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.Format;
+import com.google.android.exoplayer2.container.CreationTime;
 import com.google.android.exoplayer2.container.Mp4LocationData;
 import com.google.android.exoplayer2.container.XmpData;
 import com.google.android.exoplayer2.metadata.Metadata;
@@ -181,6 +182,7 @@ public final class InAppMuxer implements Muxer {
      // LINT.IfChange(added_metadata)
      if (entry instanceof Mp4LocationData
          || entry instanceof XmpData
+          || entry instanceof CreationTime
          || (entry instanceof MdtaMetadataEntry
              && ((MdtaMetadataEntry) entry)
                  .key.equals(MdtaMetadataEntry.KEY_ANDROID_CAPTURE_FPS))) {
@@ -220,6 +222,9 @@ public final class InAppMuxer implements Muxer {
            ((Mp4LocationData) entry).latitude, ((Mp4LocationData) entry).longitude);
      } else if (entry instanceof XmpData) {
        mp4Muxer.addXmp(ByteBuffer.wrap(((XmpData) entry).data));
+      } else if (entry instanceof CreationTime) {
+        // TODO: b/285281716 - Use creation time specific API.
+        mp4Muxer.setModificationTime(((CreationTime) entry).timestampMs);
      } else if (entry instanceof MdtaMetadataEntry) {
        MdtaMetadataEntry mdtaMetadataEntry = (MdtaMetadataEntry) entry;
        if (mdtaMetadataEntry.key.equals(MdtaMetadataEntry.KEY_ANDROID_CAPTURE_FPS)) {

--- a/library/transformer/src/test/java/com/google/android/exoplayer2/transformer/TransformerWithInAppMuxerEndToEndTest.java
+++ b/library/transformer/src/test/java/com/google/android/exoplayer2/transformer/TransformerWithInAppMuxerEndToEndTest.java
@@ -23,6 +23,7 @@ import android.net.Uri;
 import androidx.test.core.app.ApplicationProvider;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import com.google.android.exoplayer2.MediaItem;
+import com.google.android.exoplayer2.container.CreationTime;
 import com.google.android.exoplayer2.container.Mp4LocationData;
 import com.google.android.exoplayer2.container.XmpData;
 import com.google.android.exoplayer2.extractor.mp4.Mp4Extractor;
@@ -60,7 +61,7 @@ public class TransformerWithInAppMuxerEndToEndTest {
  }
  @Test
-  public void transmux_withLocationMetadata_outputMatchedExpected() throws Exception {
+  public void transmux_withLocationMetadata_outputMatchesExpected() throws Exception {
    Muxer.Factory inAppMuxerFactory =
        new InAppMuxer.Factory(
            DefaultMuxer.Factory.DEFAULT_MAX_DELAY_BETWEEN_SAMPLES_MS,
@@ -111,7 +112,7 @@ public class TransformerWithInAppMuxerEndToEndTest {
  }
  @Test
-  public void transmux_withCaptureFps_outputMatchedExpected() throws Exception {
+  public void transmux_withCaptureFps_outputMatchesExpected() throws Exception {
    Muxer.Factory inAppMuxerFactory =
        new InAppMuxer.Factory(
            DefaultMuxer.Factory.DEFAULT_MAX_DELAY_BETWEEN_SAMPLES_MS,
@@ -141,4 +142,29 @@ public class TransformerWithInAppMuxerEndToEndTest {
    DumpFileAsserts.assertOutput(
        context, fakeExtractorOutput, TestUtil.getDumpFileName(H264_MP4 + ".with_capture_fps"));
  }
+  @Test
+  public void transmux_withCreationTime_outputMatchesExpected() throws Exception {
+    Muxer.Factory inAppMuxerFactory =
+        new InAppMuxer.Factory(
+            DefaultMuxer.Factory.DEFAULT_MAX_DELAY_BETWEEN_SAMPLES_MS,
+            metadataEntries ->
+                metadataEntries.add(new CreationTime(/* timestampMs= */ 2_000_000_000_000L)));
+    Transformer transformer =
+        new Transformer.Builder(context)
+            .setClock(new FakeClock(/* isAutoAdvancing= */ true))
+            .setMuxerFactory(inAppMuxerFactory)
+            .build();
+    MediaItem mediaItem = MediaItem.fromUri(Uri.parse(MP4_FILE_ASSET_DIRECTORY + H264_MP4));
+    transformer.start(mediaItem, outputPath);
+    TransformerTestRunner.runLooper(transformer);
+    FakeExtractorOutput fakeExtractorOutput =
+        com.google.android.exoplayer2.testutil.TestUtil.extractAllSamplesFromFilePath(
+            new Mp4Extractor(), checkNotNull(outputPath));
+    // [Creation time: 2_000_000_000_000] in track metadata dump.
+    DumpFileAsserts.assertOutput(
+        context, fakeExtractorOutput, TestUtil.getDumpFileName(H264_MP4 + ".with_creation_time"));
+  }
 }
--- a/testdata/src/test/assets/extractordumps/jpeg/pixel-motion-photo-jfif-segment-shortened.jpg.0.dump
+++ b/testdata/src/test/assets/extractordumps/jpeg/pixel-motion-photo-jfif-segment-shortened.jpg.0.dump
@@ -17,6 +17,7 @@ track 0:
    width = 180
    height = 120
    pixelWidthHeightRatio = 0.5
+    metadata = entries=[Creation time: unset]
    initializationData:
      data = length 32, hash 1F3D6E87
      data = length 10, hash 7A0D0F2B

--- a/testdata/src/test/assets/extractordumps/jpeg/pixel-motion-photo-jfif-segment-shortened.jpg.1.dump
+++ b/testdata/src/test/assets/extractordumps/jpeg/pixel-motion-photo-jfif-segment-shortened.jpg.1.dump
@@ -17,6 +17,7 @@ track 0:
    width = 180
    height = 120
    pixelWidthHeightRatio = 0.5
+    metadata = entries=[Creation time: unset]
    initializationData:
      data = length 32, hash 1F3D6E87
      data = length 10, hash 7A0D0F2B

--- a/testdata/src/test/assets/extractordumps/jpeg/pixel-motion-photo-jfif-segment-shortened.jpg.2.dump
+++ b/testdata/src/test/assets/extractordumps/jpeg/pixel-motion-photo-jfif-segment-shortened.jpg.2.dump
@@ -17,6 +17,7 @@ track 0:
    width = 180
    height = 120
    pixelWidthHeightRatio = 0.5
+    metadata = entries=[Creation time: unset]
    initializationData:
      data = length 32, hash 1F3D6E87
      data = length 10, hash 7A0D0F2B

--- a/testdata/src/test/assets/extractordumps/jpeg/pixel-motion-photo-jfif-segment-shortened.jpg.3.dump
+++ b/testdata/src/test/assets/extractordumps/jpeg/pixel-motion-photo-jfif-segment-shortened.jpg.3.dump
@@ -17,6 +17,7 @@ track 0:
    width = 180
    height = 120
    pixelWidthHeightRatio = 0.5
+    metadata = entries=[Creation time: unset]
    initializationData:
      data = length 32, hash 1F3D6E87
      data = length 10, hash 7A0D0F2B

--- a/testdata/src/test/assets/extractordumps/mp4/sample.mp4.0.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample.mp4.0.dump
@@ -17,7 +17,7 @@ track 0:
    width = 1080
    height = 720
    frameRate = 29.970028
-    metadata = entries=[xyz: latitude=40.68, longitude=-74.5]
+    metadata = entries=[xyz: latitude=40.68, longitude=-74.5, Creation time: 1464714095000]
    initializationData:
      data = length 29, hash 4746B5D9
      data = length 10, hash 7A0D0F2B
@@ -153,7 +153,7 @@ track 1:
    channelCount = 1
    sampleRate = 44100
    language = und
-    metadata = entries=[TSSE: description=null: values=[Lavf56.1.0], xyz: latitude=40.68, longitude=-74.5]
+    metadata = entries=[TSSE: description=null: values=[Lavf56.1.0], xyz: latitude=40.68, longitude=-74.5, Creation time: 1464714095000]
    initializationData:
      data = length 2, hash 5F7
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample.mp4.1.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample.mp4.1.dump
@@ -17,7 +17,7 @@ track 0:
    width = 1080
    height = 720
    frameRate = 29.970028
-    metadata = entries=[xyz: latitude=40.68, longitude=-74.5]
+    metadata = entries=[xyz: latitude=40.68, longitude=-74.5, Creation time: 1464714095000]
    initializationData:
      data = length 29, hash 4746B5D9
      data = length 10, hash 7A0D0F2B
@@ -153,7 +153,7 @@ track 1:
    channelCount = 1
    sampleRate = 44100
    language = und
-    metadata = entries=[TSSE: description=null: values=[Lavf56.1.0], xyz: latitude=40.68, longitude=-74.5]
+    metadata = entries=[TSSE: description=null: values=[Lavf56.1.0], xyz: latitude=40.68, longitude=-74.5, Creation time: 1464714095000]
    initializationData:
      data = length 2, hash 5F7
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample.mp4.2.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample.mp4.2.dump
@@ -17,7 +17,7 @@ track 0:
    width = 1080
    height = 720
    frameRate = 29.970028
-    metadata = entries=[xyz: latitude=40.68, longitude=-74.5]
+    metadata = entries=[xyz: latitude=40.68, longitude=-74.5, Creation time: 1464714095000]
    initializationData:
      data = length 29, hash 4746B5D9
      data = length 10, hash 7A0D0F2B
@@ -153,7 +153,7 @@ track 1:
    channelCount = 1
    sampleRate = 44100
    language = und
-    metadata = entries=[TSSE: description=null: values=[Lavf56.1.0], xyz: latitude=40.68, longitude=-74.5]
+    metadata = entries=[TSSE: description=null: values=[Lavf56.1.0], xyz: latitude=40.68, longitude=-74.5, Creation time: 1464714095000]
    initializationData:
      data = length 2, hash 5F7
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample.mp4.3.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample.mp4.3.dump
@@ -17,7 +17,7 @@ track 0:
    width = 1080
    height = 720
    frameRate = 29.970028
-    metadata = entries=[xyz: latitude=40.68, longitude=-74.5]
+    metadata = entries=[xyz: latitude=40.68, longitude=-74.5, Creation time: 1464714095000]
    initializationData:
      data = length 29, hash 4746B5D9
      data = length 10, hash 7A0D0F2B
@@ -153,7 +153,7 @@ track 1:
    channelCount = 1
    sampleRate = 44100
    language = und
-    metadata = entries=[TSSE: description=null: values=[Lavf56.1.0], xyz: latitude=40.68, longitude=-74.5]
+    metadata = entries=[TSSE: description=null: values=[Lavf56.1.0], xyz: latitude=40.68, longitude=-74.5, Creation time: 1464714095000]
    initializationData:
      data = length 2, hash 5F7
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample.mp4.unknown_length.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample.mp4.unknown_length.dump
@@ -17,7 +17,7 @@ track 0:
    width = 1080
    height = 720
    frameRate = 29.970028
-    metadata = entries=[xyz: latitude=40.68, longitude=-74.5]
+    metadata = entries=[xyz: latitude=40.68, longitude=-74.5, Creation time: 1464714095000]
    initializationData:
      data = length 29, hash 4746B5D9
      data = length 10, hash 7A0D0F2B
@@ -153,7 +153,7 @@ track 1:
    channelCount = 1
    sampleRate = 44100
    language = und
-    metadata = entries=[TSSE: description=null: values=[Lavf56.1.0], xyz: latitude=40.68, longitude=-74.5]
+    metadata = entries=[TSSE: description=null: values=[Lavf56.1.0], xyz: latitude=40.68, longitude=-74.5, Creation time: 1464714095000]
    initializationData:
      data = length 2, hash 5F7
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample_18byte_nclx_colr.mp4.0.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_18byte_nclx_colr.mp4.0.dump
@@ -22,6 +22,7 @@ track 0:
      colorRange = 2
      colorTransfer = 3
      hdrStaticInfo = length 0, hash 0
+    metadata = entries=[Creation time: 1635264810000]
    initializationData:
      data = length 29, hash 4746B5D9
      data = length 10, hash 7A0D0F2B

--- a/testdata/src/test/assets/extractordumps/mp4/sample_18byte_nclx_colr.mp4.1.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_18byte_nclx_colr.mp4.1.dump
@@ -22,6 +22,7 @@ track 0:
      colorRange = 2
      colorTransfer = 3
      hdrStaticInfo = length 0, hash 0
+    metadata = entries=[Creation time: 1635264810000]
    initializationData:
      data = length 29, hash 4746B5D9
      data = length 10, hash 7A0D0F2B

--- a/testdata/src/test/assets/extractordumps/mp4/sample_18byte_nclx_colr.mp4.2.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_18byte_nclx_colr.mp4.2.dump
@@ -22,6 +22,7 @@ track 0:
      colorRange = 2
      colorTransfer = 3
      hdrStaticInfo = length 0, hash 0
+    metadata = entries=[Creation time: 1635264810000]
    initializationData:
      data = length 29, hash 4746B5D9
      data = length 10, hash 7A0D0F2B

--- a/testdata/src/test/assets/extractordumps/mp4/sample_18byte_nclx_colr.mp4.3.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_18byte_nclx_colr.mp4.3.dump
@@ -22,6 +22,7 @@ track 0:
      colorRange = 2
      colorTransfer = 3
      hdrStaticInfo = length 0, hash 0
+    metadata = entries=[Creation time: 1635264810000]
    initializationData:
      data = length 29, hash 4746B5D9
      data = length 10, hash 7A0D0F2B

--- a/testdata/src/test/assets/extractordumps/mp4/sample_18byte_nclx_colr.mp4.unknown_length.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_18byte_nclx_colr.mp4.unknown_length.dump
@@ -22,6 +22,7 @@ track 0:
      colorRange = 2
      colorTransfer = 3
      hdrStaticInfo = length 0, hash 0
+    metadata = entries=[Creation time: 1635264810000]
    initializationData:
      data = length 29, hash 4746B5D9
      data = length 10, hash 7A0D0F2B

--- a/testdata/src/test/assets/extractordumps/mp4/sample_ac3.mp4.0.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_ac3.mp4.0.dump
@@ -18,6 +18,7 @@ track 0:
    channelCount = 6
    sampleRate = 48000
    language = und
+    metadata = entries=[Creation time: 1581574441000]
  sample 0:
    time = 0
    flags = 1

--- a/testdata/src/test/assets/extractordumps/mp4/sample_ac3.mp4.1.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_ac3.mp4.1.dump
@@ -18,6 +18,7 @@ track 0:
    channelCount = 6
    sampleRate = 48000
    language = und
+    metadata = entries=[Creation time: 1581574441000]
  sample 0:
    time = 96000
    flags = 1

--- a/testdata/src/test/assets/extractordumps/mp4/sample_ac3.mp4.2.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_ac3.mp4.2.dump
@@ -18,6 +18,7 @@ track 0:
    channelCount = 6
    sampleRate = 48000
    language = und
+    metadata = entries=[Creation time: 1581574441000]
  sample 0:
    time = 192000
    flags = 1

--- a/testdata/src/test/assets/extractordumps/mp4/sample_ac3.mp4.3.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_ac3.mp4.3.dump
@@ -18,6 +18,7 @@ track 0:
    channelCount = 6
    sampleRate = 48000
    language = und
+    metadata = entries=[Creation time: 1581574441000]
  sample 0:
    time = 256000
    flags = 536870913

--- a/testdata/src/test/assets/extractordumps/mp4/sample_ac3.mp4.unknown_length.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_ac3.mp4.unknown_length.dump
@@ -18,6 +18,7 @@ track 0:
    channelCount = 6
    sampleRate = 48000
    language = und
+    metadata = entries=[Creation time: 1581574441000]
  sample 0:
    time = 0
    flags = 1

--- a/testdata/src/test/assets/extractordumps/mp4/sample_ac4.mp4.0.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_ac4.mp4.0.dump
@@ -16,6 +16,7 @@ track 0:
    channelCount = 2
    sampleRate = 48000
    language = und
+    metadata = entries=[Creation time: 1578288075000]
  sample 0:
    time = 0
    flags = 1

--- a/testdata/src/test/assets/extractordumps/mp4/sample_ac4.mp4.1.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_ac4.mp4.1.dump
@@ -16,6 +16,7 @@ track 0:
    channelCount = 2
    sampleRate = 48000
    language = und
+    metadata = entries=[Creation time: 1578288075000]
  sample 0:
    time = 0
    flags = 1

--- a/testdata/src/test/assets/extractordumps/mp4/sample_ac4.mp4.2.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_ac4.mp4.2.dump
@@ -16,6 +16,7 @@ track 0:
    channelCount = 2
    sampleRate = 48000
    language = und
+    metadata = entries=[Creation time: 1578288075000]
  sample 0:
    time = 0
    flags = 1

--- a/testdata/src/test/assets/extractordumps/mp4/sample_ac4.mp4.3.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_ac4.mp4.3.dump
@@ -16,6 +16,7 @@ track 0:
    channelCount = 2
    sampleRate = 48000
    language = und
+    metadata = entries=[Creation time: 1578288075000]
  sample 0:
    time = 0
    flags = 1

--- a/testdata/src/test/assets/extractordumps/mp4/sample_ac4.mp4.unknown_length.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_ac4.mp4.unknown_length.dump
@@ -16,6 +16,7 @@ track 0:
    channelCount = 2
    sampleRate = 48000
    language = und
+    metadata = entries=[Creation time: 1578288075000]
  sample 0:
    time = 0
    flags = 1

--- a/testdata/src/test/assets/extractordumps/mp4/sample_android_slow_motion.mp4.0.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_android_slow_motion.mp4.0.dump
@@ -22,7 +22,7 @@ track 0:
      colorRange = 1
      colorTransfer = -1
      hdrStaticInfo = length 0, hash 0
-    metadata = entries=[mdta: key=com.android.capture.fps, value=240.0]
+    metadata = entries=[mdta: key=com.android.capture.fps, value=240.0, Creation time: unset]
    initializationData:
      data = length 22, hash 4CF81805
      data = length 9, hash FBAFBA1C

--- a/testdata/src/test/assets/extractordumps/mp4/sample_android_slow_motion.mp4.1.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_android_slow_motion.mp4.1.dump
@@ -22,7 +22,7 @@ track 0:
      colorRange = 1
      colorTransfer = -1
      hdrStaticInfo = length 0, hash 0
-    metadata = entries=[mdta: key=com.android.capture.fps, value=240.0]
+    metadata = entries=[mdta: key=com.android.capture.fps, value=240.0, Creation time: unset]
    initializationData:
      data = length 22, hash 4CF81805
      data = length 9, hash FBAFBA1C

--- a/testdata/src/test/assets/extractordumps/mp4/sample_android_slow_motion.mp4.2.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_android_slow_motion.mp4.2.dump
@@ -22,7 +22,7 @@ track 0:
      colorRange = 1
      colorTransfer = -1
      hdrStaticInfo = length 0, hash 0
-    metadata = entries=[mdta: key=com.android.capture.fps, value=240.0]
+    metadata = entries=[mdta: key=com.android.capture.fps, value=240.0, Creation time: unset]
    initializationData:
      data = length 22, hash 4CF81805
      data = length 9, hash FBAFBA1C

--- a/testdata/src/test/assets/extractordumps/mp4/sample_android_slow_motion.mp4.3.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_android_slow_motion.mp4.3.dump
@@ -22,7 +22,7 @@ track 0:
      colorRange = 1
      colorTransfer = -1
      hdrStaticInfo = length 0, hash 0
-    metadata = entries=[mdta: key=com.android.capture.fps, value=240.0]
+    metadata = entries=[mdta: key=com.android.capture.fps, value=240.0, Creation time: unset]
    initializationData:
      data = length 22, hash 4CF81805
      data = length 9, hash FBAFBA1C

--- a/testdata/src/test/assets/extractordumps/mp4/sample_android_slow_motion.mp4.unknown_length.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_android_slow_motion.mp4.unknown_length.dump
@@ -22,7 +22,7 @@ track 0:
      colorRange = 1
      colorTransfer = -1
      hdrStaticInfo = length 0, hash 0
-    metadata = entries=[mdta: key=com.android.capture.fps, value=240.0]
+    metadata = entries=[mdta: key=com.android.capture.fps, value=240.0, Creation time: unset]
    initializationData:
      data = length 22, hash 4CF81805
      data = length 9, hash FBAFBA1C

--- a/testdata/src/test/assets/extractordumps/mp4/sample_dthd.mp4.0.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_dthd.mp4.0.dump
@@ -16,6 +16,7 @@ track 0:
    channelCount = 2
    sampleRate = 48000
    language = und
+    metadata = entries=[Creation time: 1633006610000]
  sample 0:
    time = 0
    flags = 1

--- a/testdata/src/test/assets/extractordumps/mp4/sample_dthd.mp4.1.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_dthd.mp4.1.dump
@@ -16,6 +16,7 @@ track 0:
    channelCount = 2
    sampleRate = 48000
    language = und
+    metadata = entries=[Creation time: 1633006610000]
  sample 0:
    time = 106666
    flags = 1

--- a/testdata/src/test/assets/extractordumps/mp4/sample_dthd.mp4.2.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_dthd.mp4.2.dump
@@ -16,6 +16,7 @@ track 0:
    channelCount = 2
    sampleRate = 48000
    language = und
+    metadata = entries=[Creation time: 1633006610000]
  sample 0:
    time = 213333
    flags = 1

--- a/testdata/src/test/assets/extractordumps/mp4/sample_dthd.mp4.3.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_dthd.mp4.3.dump
@@ -16,6 +16,7 @@ track 0:
    channelCount = 2
    sampleRate = 48000
    language = und
+    metadata = entries=[Creation time: 1633006610000]
  sample 0:
    time = 320000
    flags = 1

--- a/testdata/src/test/assets/extractordumps/mp4/sample_dthd.mp4.unknown_length.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_dthd.mp4.unknown_length.dump
@@ -16,6 +16,7 @@ track 0:
    channelCount = 2
    sampleRate = 48000
    language = und
+    metadata = entries=[Creation time: 1633006610000]
  sample 0:
    time = 0
    flags = 1

--- a/testdata/src/test/assets/extractordumps/mp4/sample_eac3.mp4.0.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_eac3.mp4.0.dump
@@ -17,6 +17,7 @@ track 0:
    channelCount = 6
    sampleRate = 48000
    language = und
+    metadata = entries=[Creation time: 1579241726000]
  sample 0:
    time = 0
    flags = 1

--- a/testdata/src/test/assets/extractordumps/mp4/sample_eac3.mp4.1.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_eac3.mp4.1.dump
@@ -17,6 +17,7 @@ track 0:
    channelCount = 6
    sampleRate = 48000
    language = und
+    metadata = entries=[Creation time: 1579241726000]
  sample 0:
    time = 576000
    flags = 1

--- a/testdata/src/test/assets/extractordumps/mp4/sample_eac3.mp4.2.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_eac3.mp4.2.dump
@@ -17,6 +17,7 @@ track 0:
    channelCount = 6
    sampleRate = 48000
    language = und
+    metadata = entries=[Creation time: 1579241726000]
  sample 0:
    time = 1152000
    flags = 1

--- a/testdata/src/test/assets/extractordumps/mp4/sample_eac3.mp4.3.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_eac3.mp4.3.dump
@@ -17,6 +17,7 @@ track 0:
    channelCount = 6
    sampleRate = 48000
    language = und
+    metadata = entries=[Creation time: 1579241726000]
  sample 0:
    time = 1696000
    flags = 536870913

--- a/testdata/src/test/assets/extractordumps/mp4/sample_eac3.mp4.unknown_length.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_eac3.mp4.unknown_length.dump
@@ -17,6 +17,7 @@ track 0:
    channelCount = 6
    sampleRate = 48000
    language = und
+    metadata = entries=[Creation time: 1579241726000]
  sample 0:
    time = 0
    flags = 1

--- a/testdata/src/test/assets/extractordumps/mp4/sample_eac3joc.mp4.0.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_eac3joc.mp4.0.dump
@@ -17,6 +17,7 @@ track 0:
    channelCount = 6
    sampleRate = 48000
    language = und
+    metadata = entries=[Creation time: 1579242140000]
  sample 0:
    time = 0
    flags = 1

--- a/testdata/src/test/assets/extractordumps/mp4/sample_eac3joc.mp4.1.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_eac3joc.mp4.1.dump
@@ -17,6 +17,7 @@ track 0:
    channelCount = 6
    sampleRate = 48000
    language = und
+    metadata = entries=[Creation time: 1579242140000]
  sample 0:
    time = 672000
    flags = 1

--- a/testdata/src/test/assets/extractordumps/mp4/sample_eac3joc.mp4.2.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_eac3joc.mp4.2.dump
@@ -17,6 +17,7 @@ track 0:
    channelCount = 6
    sampleRate = 48000
    language = und
+    metadata = entries=[Creation time: 1579242140000]
  sample 0:
    time = 1344000
    flags = 1

--- a/testdata/src/test/assets/extractordumps/mp4/sample_eac3joc.mp4.3.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_eac3joc.mp4.3.dump
@@ -17,6 +17,7 @@ track 0:
    channelCount = 6
    sampleRate = 48000
    language = und
+    metadata = entries=[Creation time: 1579242140000]
  sample 0:
    time = 2016000
    flags = 536870913

--- a/testdata/src/test/assets/extractordumps/mp4/sample_eac3joc.mp4.unknown_length.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_eac3joc.mp4.unknown_length.dump
@@ -17,6 +17,7 @@ track 0:
    channelCount = 6
    sampleRate = 48000
    language = und
+    metadata = entries=[Creation time: 1579242140000]
  sample 0:
    time = 0
    flags = 1

--- a/testdata/src/test/assets/extractordumps/mp4/sample_mdat_too_long.mp4.0.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_mdat_too_long.mp4.0.dump
@@ -17,6 +17,7 @@ track 0:
    width = 1080
    height = 720
    frameRate = 29.970028
+    metadata = entries=[Creation time: 1464714095000]
    initializationData:
      data = length 29, hash 4746B5D9
      data = length 10, hash 7A0D0F2B
@@ -152,7 +153,7 @@ track 1:
    channelCount = 1
    sampleRate = 44100
    language = und
-    metadata = entries=[TSSE: description=null: values=[Lavf56.1.0]]
+    metadata = entries=[TSSE: description=null: values=[Lavf56.1.0], Creation time: 1464714095000]
    initializationData:
      data = length 2, hash 5F7
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample_mdat_too_long.mp4.1.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_mdat_too_long.mp4.1.dump
@@ -17,6 +17,7 @@ track 0:
    width = 1080
    height = 720
    frameRate = 29.970028
+    metadata = entries=[Creation time: 1464714095000]
    initializationData:
      data = length 29, hash 4746B5D9
      data = length 10, hash 7A0D0F2B
@@ -152,7 +153,7 @@ track 1:
    channelCount = 1
    sampleRate = 44100
    language = und
-    metadata = entries=[TSSE: description=null: values=[Lavf56.1.0]]
+    metadata = entries=[TSSE: description=null: values=[Lavf56.1.0], Creation time: 1464714095000]
    initializationData:
      data = length 2, hash 5F7
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample_mdat_too_long.mp4.2.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_mdat_too_long.mp4.2.dump
@@ -17,6 +17,7 @@ track 0:
    width = 1080
    height = 720
    frameRate = 29.970028
+    metadata = entries=[Creation time: 1464714095000]
    initializationData:
      data = length 29, hash 4746B5D9
      data = length 10, hash 7A0D0F2B
@@ -152,7 +153,7 @@ track 1:
    channelCount = 1
    sampleRate = 44100
    language = und
-    metadata = entries=[TSSE: description=null: values=[Lavf56.1.0]]
+    metadata = entries=[TSSE: description=null: values=[Lavf56.1.0], Creation time: 1464714095000]
    initializationData:
      data = length 2, hash 5F7
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample_mdat_too_long.mp4.3.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_mdat_too_long.mp4.3.dump
@@ -17,6 +17,7 @@ track 0:
    width = 1080
    height = 720
    frameRate = 29.970028
+    metadata = entries=[Creation time: 1464714095000]
    initializationData:
      data = length 29, hash 4746B5D9
      data = length 10, hash 7A0D0F2B
@@ -152,7 +153,7 @@ track 1:
    channelCount = 1
    sampleRate = 44100
    language = und
-    metadata = entries=[TSSE: description=null: values=[Lavf56.1.0]]
+    metadata = entries=[TSSE: description=null: values=[Lavf56.1.0], Creation time: 1464714095000]
    initializationData:
      data = length 2, hash 5F7
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample_mdat_too_long.mp4.unknown_length.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_mdat_too_long.mp4.unknown_length.dump
@@ -17,6 +17,7 @@ track 0:
    width = 1080
    height = 720
    frameRate = 29.970028
+    metadata = entries=[Creation time: 1464714095000]
    initializationData:
      data = length 29, hash 4746B5D9
      data = length 10, hash 7A0D0F2B
@@ -152,7 +153,7 @@ track 1:
    channelCount = 1
    sampleRate = 44100
    language = und
-    metadata = entries=[TSSE: description=null: values=[Lavf56.1.0]]
+    metadata = entries=[TSSE: description=null: values=[Lavf56.1.0], Creation time: 1464714095000]
    initializationData:
      data = length 2, hash 5F7
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample_mpegh_mha1.mp4.0.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_mpegh_mha1.mp4.0.dump
@@ -18,6 +18,7 @@ track 0:
    encoderDelay = 3072
    encoderPadding = 255
    language = und
+    metadata = entries=[Creation time: 1619054108000]
    initializationData:
      data = length 26, hash 4E58F6C7
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample_mpegh_mha1.mp4.1.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_mpegh_mha1.mp4.1.dump
@@ -18,6 +18,7 @@ track 0:
    encoderDelay = 3072
    encoderPadding = 255
    language = und
+    metadata = entries=[Creation time: 1619054108000]
    initializationData:
      data = length 26, hash 4E58F6C7
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample_mpegh_mha1.mp4.2.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_mpegh_mha1.mp4.2.dump
@@ -18,6 +18,7 @@ track 0:
    encoderDelay = 3072
    encoderPadding = 255
    language = und
+    metadata = entries=[Creation time: 1619054108000]
    initializationData:
      data = length 26, hash 4E58F6C7
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample_mpegh_mha1.mp4.3.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_mpegh_mha1.mp4.3.dump
@@ -18,6 +18,7 @@ track 0:
    encoderDelay = 3072
    encoderPadding = 255
    language = und
+    metadata = entries=[Creation time: 1619054108000]
    initializationData:
      data = length 26, hash 4E58F6C7
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample_mpegh_mha1.mp4.unknown_length.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_mpegh_mha1.mp4.unknown_length.dump
@@ -18,6 +18,7 @@ track 0:
    encoderDelay = 3072
    encoderPadding = 255
    language = und
+    metadata = entries=[Creation time: 1619054108000]
    initializationData:
      data = length 26, hash 4E58F6C7
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample_mpegh_mhm1.mp4.0.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_mpegh_mhm1.mp4.0.dump
@@ -18,6 +18,7 @@ track 0:
    encoderDelay = 3072
    encoderPadding = 255
    language = und
+    metadata = entries=[Creation time: 1619054108000]
    initializationData:
      data = length 26, hash 4E58F6C7
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample_mpegh_mhm1.mp4.1.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_mpegh_mhm1.mp4.1.dump
@@ -18,6 +18,7 @@ track 0:
    encoderDelay = 3072
    encoderPadding = 255
    language = und
+    metadata = entries=[Creation time: 1619054108000]
    initializationData:
      data = length 26, hash 4E58F6C7
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample_mpegh_mhm1.mp4.2.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_mpegh_mhm1.mp4.2.dump
@@ -18,6 +18,7 @@ track 0:
    encoderDelay = 3072
    encoderPadding = 255
    language = und
+    metadata = entries=[Creation time: 1619054108000]
    initializationData:
      data = length 26, hash 4E58F6C7
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample_mpegh_mhm1.mp4.3.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_mpegh_mhm1.mp4.3.dump
@@ -18,6 +18,7 @@ track 0:
    encoderDelay = 3072
    encoderPadding = 255
    language = und
+    metadata = entries=[Creation time: 1619054108000]
    initializationData:
      data = length 26, hash 4E58F6C7
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample_mpegh_mhm1.mp4.unknown_length.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_mpegh_mhm1.mp4.unknown_length.dump
@@ -18,6 +18,7 @@ track 0:
    encoderDelay = 3072
    encoderPadding = 255
    language = und
+    metadata = entries=[Creation time: 1619054108000]
    initializationData:
      data = length 26, hash 4E58F6C7
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample_opus.mp4.0.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_opus.mp4.0.dump
@@ -16,7 +16,7 @@ track 0:
    channelCount = 2
    sampleRate = 48000
    language = und
-    metadata = entries=[TSSE: description=null: values=[Lavf58.29.100]]
+    metadata = entries=[TSSE: description=null: values=[Lavf58.29.100], Creation time: unset]
    initializationData:
      data = length 19, hash 86852AE2
      data = length 8, hash 72CBCBF5

--- a/testdata/src/test/assets/extractordumps/mp4/sample_opus.mp4.1.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_opus.mp4.1.dump
@@ -16,7 +16,7 @@ track 0:
    channelCount = 2
    sampleRate = 48000
    language = und
-    metadata = entries=[TSSE: description=null: values=[Lavf58.29.100]]
+    metadata = entries=[TSSE: description=null: values=[Lavf58.29.100], Creation time: unset]
    initializationData:
      data = length 19, hash 86852AE2
      data = length 8, hash 72CBCBF5

--- a/testdata/src/test/assets/extractordumps/mp4/sample_opus.mp4.2.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_opus.mp4.2.dump
@@ -16,7 +16,7 @@ track 0:
    channelCount = 2
    sampleRate = 48000
    language = und
-    metadata = entries=[TSSE: description=null: values=[Lavf58.29.100]]
+    metadata = entries=[TSSE: description=null: values=[Lavf58.29.100], Creation time: unset]
    initializationData:
      data = length 19, hash 86852AE2
      data = length 8, hash 72CBCBF5

--- a/testdata/src/test/assets/extractordumps/mp4/sample_opus.mp4.3.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_opus.mp4.3.dump
@@ -16,7 +16,7 @@ track 0:
    channelCount = 2
    sampleRate = 48000
    language = und
-    metadata = entries=[TSSE: description=null: values=[Lavf58.29.100]]
+    metadata = entries=[TSSE: description=null: values=[Lavf58.29.100], Creation time: unset]
    initializationData:
      data = length 19, hash 86852AE2
      data = length 8, hash 72CBCBF5

--- a/testdata/src/test/assets/extractordumps/mp4/sample_opus.mp4.unknown_length.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_opus.mp4.unknown_length.dump
@@ -16,7 +16,7 @@ track 0:
    channelCount = 2
    sampleRate = 48000
    language = und
-    metadata = entries=[TSSE: description=null: values=[Lavf58.29.100]]
+    metadata = entries=[TSSE: description=null: values=[Lavf58.29.100], Creation time: unset]
    initializationData:
      data = length 19, hash 86852AE2
      data = length 8, hash 72CBCBF5

--- a/testdata/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.0.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.0.dump
@@ -23,6 +23,7 @@ track 0:
      colorRange = 2
      colorTransfer = 7
      hdrStaticInfo = length 0, hash 0
+    metadata = entries=[Creation time: 1621959711000]
    initializationData:
      data = length 526, hash 7B3FC433
  sample 0:
@@ -74,6 +75,7 @@ track 1:
    sampleRate = 44100
    encoderPadding = 2204
    language = und
+    metadata = entries=[Creation time: 1621959711000]
    initializationData:
      data = length 2, hash 5FF
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.1.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.1.dump
@@ -23,6 +23,7 @@ track 0:
      colorRange = 2
      colorTransfer = 7
      hdrStaticInfo = length 0, hash 0
+    metadata = entries=[Creation time: 1621959711000]
    initializationData:
      data = length 526, hash 7B3FC433
  sample 0:
@@ -74,6 +75,7 @@ track 1:
    sampleRate = 44100
    encoderPadding = 2204
    language = und
+    metadata = entries=[Creation time: 1621959711000]
    initializationData:
      data = length 2, hash 5FF
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.2.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.2.dump
@@ -23,6 +23,7 @@ track 0:
      colorRange = 2
      colorTransfer = 7
      hdrStaticInfo = length 0, hash 0
+    metadata = entries=[Creation time: 1621959711000]
    initializationData:
      data = length 526, hash 7B3FC433
  sample 0:
@@ -74,6 +75,7 @@ track 1:
    sampleRate = 44100
    encoderPadding = 2204
    language = und
+    metadata = entries=[Creation time: 1621959711000]
    initializationData:
      data = length 2, hash 5FF
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.3.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.3.dump
@@ -23,6 +23,7 @@ track 0:
      colorRange = 2
      colorTransfer = 7
      hdrStaticInfo = length 0, hash 0
+    metadata = entries=[Creation time: 1621959711000]
    initializationData:
      data = length 526, hash 7B3FC433
  sample 0:
@@ -74,6 +75,7 @@ track 1:
    sampleRate = 44100
    encoderPadding = 2204
    language = und
+    metadata = entries=[Creation time: 1621959711000]
    initializationData:
      data = length 2, hash 5FF
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.unknown_length.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.unknown_length.dump
@@ -23,6 +23,7 @@ track 0:
      colorRange = 2
      colorTransfer = 7
      hdrStaticInfo = length 0, hash 0
+    metadata = entries=[Creation time: 1621959711000]
    initializationData:
      data = length 526, hash 7B3FC433
  sample 0:
@@ -74,6 +75,7 @@ track 1:
    sampleRate = 44100
    encoderPadding = 2204
    language = und
+    metadata = entries=[Creation time: 1621959711000]
    initializationData:
      data = length 2, hash 5FF
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample_with_colr_mdcv_and_clli.mp4.0.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_with_colr_mdcv_and_clli.mp4.0.dump
@@ -21,6 +21,7 @@ track 0:
      colorRange = 2
      colorTransfer = 6
      hdrStaticInfo = length 25, hash 423AFC35
+    metadata = entries=[Creation time: unset]
  sample 0:
    time = 0
    flags = 1
@@ -274,7 +275,7 @@ track 1:
    channelCount = 2
    sampleRate = 44100
    language = und
-    metadata = entries=[TSSE: description=null: values=[Lavf58.76.100]]
+    metadata = entries=[TSSE: description=null: values=[Lavf58.76.100], Creation time: unset]
    initializationData:
      data = length 16, hash CAA21BBF
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample_with_colr_mdcv_and_clli.mp4.1.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_with_colr_mdcv_and_clli.mp4.1.dump
@@ -21,6 +21,7 @@ track 0:
      colorRange = 2
      colorTransfer = 6
      hdrStaticInfo = length 25, hash 423AFC35
+    metadata = entries=[Creation time: unset]
  sample 0:
    time = 0
    flags = 1
@@ -274,7 +275,7 @@ track 1:
    channelCount = 2
    sampleRate = 44100
    language = und
-    metadata = entries=[TSSE: description=null: values=[Lavf58.76.100]]
+    metadata = entries=[TSSE: description=null: values=[Lavf58.76.100], Creation time: unset]
    initializationData:
      data = length 16, hash CAA21BBF
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample_with_colr_mdcv_and_clli.mp4.2.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_with_colr_mdcv_and_clli.mp4.2.dump
@@ -21,6 +21,7 @@ track 0:
      colorRange = 2
      colorTransfer = 6
      hdrStaticInfo = length 25, hash 423AFC35
+    metadata = entries=[Creation time: unset]
  sample 0:
    time = 0
    flags = 1
@@ -274,7 +275,7 @@ track 1:
    channelCount = 2
    sampleRate = 44100
    language = und
-    metadata = entries=[TSSE: description=null: values=[Lavf58.76.100]]
+    metadata = entries=[TSSE: description=null: values=[Lavf58.76.100], Creation time: unset]
    initializationData:
      data = length 16, hash CAA21BBF
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample_with_colr_mdcv_and_clli.mp4.3.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_with_colr_mdcv_and_clli.mp4.3.dump
@@ -21,6 +21,7 @@ track 0:
      colorRange = 2
      colorTransfer = 6
      hdrStaticInfo = length 25, hash 423AFC35
+    metadata = entries=[Creation time: unset]
  sample 0:
    time = 0
    flags = 1
@@ -274,7 +275,7 @@ track 1:
    channelCount = 2
    sampleRate = 44100
    language = und
-    metadata = entries=[TSSE: description=null: values=[Lavf58.76.100]]
+    metadata = entries=[TSSE: description=null: values=[Lavf58.76.100], Creation time: unset]
    initializationData:
      data = length 16, hash CAA21BBF
  sample 0:

--- a/testdata/src/test/assets/extractordumps/mp4/sample_with_colr_mdcv_and_clli.mp4.unknown_length.dump
+++ b/testdata/src/test/assets/extractordumps/mp4/sample_with_colr_mdcv_and_clli.mp4.unknown_length.dump
@@ -21,6 +21,7 @@ track 0:
      colorRange = 2
      colorTransfer = 6
      hdrStaticInfo = length 25, hash 423AFC35
+    metadata = entries=[Creation time: unset]
  sample 0:
    time = 0
    flags = 1
@@ -274,7 +275,7 @@ track 1:
    channelCount = 2
    sampleRate = 44100
    language = und
-    metadata = entries=[TSSE: description=null: values=[Lavf58.76.100]]
+    metadata = entries=[TSSE: description=null: values=[Lavf58.76.100], Creation time: unset]
    initializationData:
      data = length 16, hash CAA21BBF
  sample 0:

--- a/testdata/src/test/assets/muxerdumps/h265_with_metadata_track.mp4.dump
+++ b/testdata/src/test/assets/muxerdumps/h265_with_metadata_track.mp4.dump
@@ -13,6 +13,7 @@ track 0:
    id = 1
    sampleMimeType = application/meta
    maxInputSize = 161
+    metadata = entries=[Creation time: 500000000]
  sample 0:
    time = 0
    flags = 1
@@ -38,6 +39,7 @@ track 1:
    channelCount = 2
    sampleRate = 48000
    language = ```
+    metadata = entries=[Creation time: 500000000]
    initializationData:
      data = length 2, hash 560
  sample 0:
@@ -68,6 +70,7 @@ track 2:
      colorRange = 1
      colorTransfer = 3
      hdrStaticInfo = length 0, hash 0
+    metadata = entries=[Creation time: 500000000]
    initializationData:
      data = length 85, hash 6F3CAA16
  sample 0:

--- a/testdata/src/test/assets/muxerdumps/hdr10-720p.mp4.dump
+++ b/testdata/src/test/assets/muxerdumps/hdr10-720p.mp4.dump
@@ -22,6 +22,7 @@ track 0:
      colorRange = 2
      colorTransfer = 6
      hdrStaticInfo = length 0, hash 0
+    metadata = entries=[Creation time: 500000000]
    initializationData:
      data = length 99, hash 99842E5A
  sample 0:
@@ -545,6 +546,7 @@ track 1:
    channelCount = 2
    sampleRate = 48000
    language = ```
+    metadata = entries=[Creation time: 500000000]
    initializationData:
      data = length 2, hash 560
  sample 0:

--- a/testdata/src/test/assets/muxerdumps/mp4_with_0_orientation.mp4.dump
+++ b/testdata/src/test/assets/muxerdumps/mp4_with_0_orientation.mp4.dump
@@ -21,6 +21,7 @@ track 0:
      colorRange = 1
      colorTransfer = -1
      hdrStaticInfo = length 0, hash 0
+    metadata = entries=[Creation time: 5000000]
    initializationData:
      data = length 28, hash 410B510
      data = length 9, hash FBADD682

--- a/testdata/src/test/assets/muxerdumps/mp4_with_180_orientation.mp4.dump
+++ b/testdata/src/test/assets/muxerdumps/mp4_with_180_orientation.mp4.dump
@@ -22,6 +22,7 @@ track 0:
      colorRange = 1
      colorTransfer = -1
      hdrStaticInfo = length 0, hash 0
+    metadata = entries=[Creation time: 5000000]
    initializationData:
      data = length 28, hash 410B510
      data = length 9, hash FBADD682

--- a/testdata/src/test/assets/muxerdumps/mp4_with_270_orientation.mp4.dump
+++ b/testdata/src/test/assets/muxerdumps/mp4_with_270_orientation.mp4.dump
@@ -22,6 +22,7 @@ track 0:
      colorRange = 1
      colorTransfer = -1
      hdrStaticInfo = length 0, hash 0
+    metadata = entries=[Creation time: 5000000]
    initializationData:
      data = length 28, hash 410B510
      data = length 9, hash FBADD682

--- a/testdata/src/test/assets/muxerdumps/mp4_with_90_orientation.mp4.dump
+++ b/testdata/src/test/assets/muxerdumps/mp4_with_90_orientation.mp4.dump
@@ -22,6 +22,7 @@ track 0:
      colorRange = 1
      colorTransfer = -1
      hdrStaticInfo = length 0, hash 0
+    metadata = entries=[Creation time: 5000000]
    initializationData:
      data = length 28, hash 410B510
      data = length 9, hash FBADD682

--- a/testdata/src/test/assets/muxerdumps/mp4_with_different_tracks_offset.mp4.dump
+++ b/testdata/src/test/assets/muxerdumps/mp4_with_different_tracks_offset.mp4.dump
@@ -22,6 +22,7 @@ track 0:
      colorRange = 1
      colorTransfer = -1
      hdrStaticInfo = length 0, hash 0
+    metadata = entries=[Creation time: 500000000]
    initializationData:
      data = length 28, hash 410B510
      data = length 9, hash FBADD682
@@ -49,6 +50,7 @@ track 1:
      colorRange = 1
      colorTransfer = -1
      hdrStaticInfo = length 0, hash 0
+    metadata = entries=[Creation time: 500000000]
    initializationData:
      data = length 28, hash 410B510
      data = length 9, hash FBADD682

--- a/testdata/src/test/assets/muxerdumps/mp4_with_frame_rate.mp4.dump
+++ b/testdata/src/test/assets/muxerdumps/mp4_with_frame_rate.mp4.dump
@@ -21,7 +21,7 @@ track 0:
      colorRange = 1
      colorTransfer = -1
      hdrStaticInfo = length 0, hash 0
-    metadata = entries=[mdta: key=com.android.capture.fps, value=120.0]
+    metadata = entries=[mdta: key=com.android.capture.fps, value=120.0, Creation time: 5000000]
    initializationData:
      data = length 28, hash 410B510
      data = length 9, hash FBADD682

--- a/testdata/src/test/assets/muxerdumps/mp4_with_location.mp4.dump
+++ b/testdata/src/test/assets/muxerdumps/mp4_with_location.mp4.dump
@@ -21,7 +21,7 @@ track 0:
      colorRange = 1
      colorTransfer = -1
      hdrStaticInfo = length 0, hash 0
-    metadata = entries=[xyz: latitude=33.0, longitude=-120.0]
+    metadata = entries=[xyz: latitude=33.0, longitude=-120.0, Creation time: 5000000]
    initializationData:
      data = length 28, hash 410B510
      data = length 9, hash FBADD682

--- a/testdata/src/test/assets/muxerdumps/mp4_with_null_location.mp4.dump
+++ b/testdata/src/test/assets/muxerdumps/mp4_with_null_location.mp4.dump
@@ -21,6 +21,7 @@ track 0:
      colorRange = 1
      colorTransfer = -1
      hdrStaticInfo = length 0, hash 0
+    metadata = entries=[Creation time: 5000000]
    initializationData:
      data = length 28, hash 410B510
      data = length 9, hash FBADD682

--- a/testdata/src/test/assets/muxerdumps/mp4_with_same_tracks_offset.mp4.dump
+++ b/testdata/src/test/assets/muxerdumps/mp4_with_same_tracks_offset.mp4.dump
@@ -22,6 +22,7 @@ track 0:
      colorRange = 1
      colorTransfer = -1
      hdrStaticInfo = length 0, hash 0
+    metadata = entries=[Creation time: 500000000]
    initializationData:
      data = length 28, hash 410B510
      data = length 9, hash FBADD682
@@ -49,6 +50,7 @@ track 1:
      colorRange = 1
      colorTransfer = -1
      hdrStaticInfo = length 0, hash 0
+    metadata = entries=[Creation time: 500000000]
    initializationData:
      data = length 28, hash 410B510
      data = length 9, hash FBADD682

--- a/testdata/src/test/assets/muxerdumps/partial_hdr10-720p.mp4.dump
+++ b/testdata/src/test/assets/muxerdumps/partial_hdr10-720p.mp4.dump
@@ -22,6 +22,7 @@ track 0:
      colorRange = 2
      colorTransfer = 6
      hdrStaticInfo = length 0, hash 0
+    metadata = entries=[Creation time: 500000000]
    initializationData:
      data = length 99, hash 99842E5A
  sample 0:
@@ -413,6 +414,7 @@ track 1:
    channelCount = 2
    sampleRate = 48000
    language = ```
+    metadata = entries=[Creation time: 500000000]
    initializationData:
      data = length 2, hash 560
  sample 0:

--- a/testdata/src/test/assets/muxerdumps/sample.mp4.dump
+++ b/testdata/src/test/assets/muxerdumps/sample.mp4.dump
@@ -17,6 +17,7 @@ track 0:
    width = 1080
    height = 720
    frameRate = 32.113037
+    metadata = entries=[Creation time: 500000000]
    initializationData:
      data = length 29, hash 4746B5D9
      data = length 10, hash 7A0D0F2B
@@ -152,6 +153,7 @@ track 1:
    channelCount = 1
    sampleRate = 44100
    language = und
+    metadata = entries=[Creation time: 500000000]
    initializationData:
      data = length 2, hash 5F7
  sample 0:

--- a/testdata/src/test/assets/muxerdumps/sample_av1.mp4.dump
+++ b/testdata/src/test/assets/muxerdumps/sample_av1.mp4.dump
@@ -16,6 +16,7 @@ track 0:
    width = 1080
    height = 720
    frameRate = 31.004547
+    metadata = entries=[Creation time: 500000000]
  sample 0:
    time = 0
    flags = 1
@@ -149,6 +150,7 @@ track 1:
    channelCount = 1
    sampleRate = 44100
    language = und
+    metadata = entries=[Creation time: 500000000]
    initializationData:
      data = length 5, hash 2B7623A
  sample 0:

--- a/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.48000hz.dump
+++ b/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.48000hz.dump
@@ -6,19 +6,19 @@ format 0:
  width = 1080
  height = 720
  frameRate = 29.970028
-  metadata = entries=[xyz: latitude=40.68, longitude=-74.5]
+  metadata = entries=[xyz: latitude=40.68, longitude=-74.5, Creation time: 1464714095000]
  initializationData:
    data = length 29, hash 4746B5D9
    data = length 10, hash 7A0D0F2B
-container metadata = entries=[xyz: latitude=40.68, longitude=-74.5]
+container metadata = entries=[xyz: latitude=40.68, longitude=-74.5, Creation time: 1464714095000]
 format 1:
  averageBitrate = 131072
  sampleMimeType = audio/mp4a-latm
  channelCount = 1
  sampleRate = 48000
  pcmEncoding = 2
-  metadata = entries=[TSSE: description=null: values=[Lavf56.1.0], xyz: latitude=40.68, longitude=-74.5]
+  metadata = entries=[TSSE: description=null: values=[Lavf56.1.0], xyz: latitude=40.68, longitude=-74.5, Creation time: 1464714095000]
-container metadata = entries=[TSSE: description=null: values=[Lavf56.1.0], xyz: latitude=40.68, longitude=-74.5]
+container metadata = entries=[TSSE: description=null: values=[Lavf56.1.0], xyz: latitude=40.68, longitude=-74.5, Creation time: 1464714095000]
 sample:
  trackIndex = 1
  dataHashCode = 1868041800

--- a/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.concatenated.dump
+++ b/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.concatenated.dump
--- a/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.concatenated_with_high_pitch_and_no_video.dump
+++ b/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.concatenated_with_high_pitch_and_no_video.dump
--- a/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.dump
+++ b/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.dump
--- a/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.noaudio.dump
+++ b/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.noaudio.dump
--- a/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.novideo.dump
+++ b/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.novideo.dump
--- a/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.rotated.dump
+++ b/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.rotated.dump
--- a/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.silence_then_audio.dump
+++ b/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.silence_then_audio.dump
--- a/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.silence_then_audio_with_effects.dump
+++ b/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.silence_then_audio_with_effects.dump
--- a/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.silentaudio.dump
+++ b/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.silentaudio.dump
--- a/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.with_capture_fps.dump
+++ b/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.with_capture_fps.dump
--- a/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.with_creation_time.dump
+++ b/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.with_creation_time.dump
--- a/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.with_location_metadata.dump
+++ b/testdata/src/test/assets/transformerdumps/mp4/sample.mp4.with_location_metadata.dump
--- a/testdata/src/test/assets/transformerdumps/mp4/sample_18byte_nclx_colr.mp4.dump
+++ b/testdata/src/test/assets/transformerdumps/mp4/sample_18byte_nclx_colr.mp4.dump
--- a/testdata/src/test/assets/transformerdumps/mp4/sample_18byte_nclx_colr.mp4.silentaudio.dump
+++ b/testdata/src/test/assets/transformerdumps/mp4/sample_18byte_nclx_colr.mp4.silentaudio.dump
--- a/testdata/src/test/assets/transformerdumps/mp4/sample_ac3.mp4.fallback.dump
+++ b/testdata/src/test/assets/transformerdumps/mp4/sample_ac3.mp4.fallback.dump
--- a/testdata/src/test/assets/transformerdumps/mp4/sample_sef_slow_motion.mp4.dump
+++ b/testdata/src/test/assets/transformerdumps/mp4/sample_sef_slow_motion.mp4.dump
--- a/testdata/src/test/assets/transformerdumps/mp4/sample_with_increasing_timestamps_320w_240h.mp4.clipped.dump
+++ b/testdata/src/test/assets/transformerdumps/mp4/sample_with_increasing_timestamps_320w_240h.mp4.clipped.dump
--- a/testdata/src/test/assets/transformerdumps/mp4/sample_with_increasing_timestamps_320w_240h.mp4.clipped_and_concatenated.dump
+++ b/testdata/src/test/assets/transformerdumps/mp4/sample_with_increasing_timestamps_320w_240h.mp4.clipped_and_concatenated.dump