diff --git a/library/common/src/main/java/com/google/android/exoplayer2/MediaMetadata.java b/library/common/src/main/java/com/google/android/exoplayer2/MediaMetadata.java
index a5a1b1f1ed..8075b01e6e 100644
--- a/library/common/src/main/java/com/google/android/exoplayer2/MediaMetadata.java
+++ b/library/common/src/main/java/com/google/android/exoplayer2/MediaMetadata.java
@@ -53,6 +53,7 @@ public final class MediaMetadata implements Bundleable {
     @Nullable private Integer totalTrackCount;
     @Nullable @FolderType private Integer folderType;
     @Nullable private Boolean isPlayable;
+    @Nullable private Bundle extras;
 
     public Builder() {}
 
@@ -73,6 +74,7 @@ public final class MediaMetadata implements Bundleable {
       this.totalTrackCount = mediaMetadata.totalTrackCount;
       this.folderType = mediaMetadata.folderType;
       this.isPlayable = mediaMetadata.isPlayable;
+      this.extras = mediaMetadata.extras;
     }
 
     /** Sets the title. */
@@ -175,6 +177,12 @@ public final class MediaMetadata implements Bundleable {
       return this;
     }
 
+    /** Sets the extras {@link Bundle}. */
+    public Builder setExtras(@Nullable Bundle extras) {
+      this.extras = extras;
+      return this;
+    }
+
     /**
      * Sets all fields supported by the {@link Metadata.Entry entries} within the {@link Metadata}.
      *
@@ -293,6 +301,13 @@ public final class MediaMetadata implements Bundleable {
   @Nullable @FolderType public final Integer folderType;
   /** Optional boolean for media playability. */
   @Nullable public final Boolean isPlayable;
+  /**
+   * Optional extras {@link Bundle}.
+   *
+   * <p>Given the complexities of checking the equality of two {@link Bundle}s, this is not
+   * considered in the {@link #equals(Object)} or {@link #hashCode()}.
+   */
+  @Nullable public final Bundle extras;
 
   private MediaMetadata(Builder builder) {
     this.title = builder.title;
@@ -311,6 +326,7 @@ public final class MediaMetadata implements Bundleable {
     this.totalTrackCount = builder.totalTrackCount;
     this.folderType = builder.folderType;
     this.isPlayable = builder.isPlayable;
+    this.extras = builder.extras;
   }
 
   /** Returns a new {@link Builder} instance with the current {@link MediaMetadata} fields. */
@@ -386,7 +402,8 @@ public final class MediaMetadata implements Bundleable {
     FIELD_TRACK_NUMBER,
     FIELD_TOTAL_TRACK_COUNT,
     FIELD_FOLDER_TYPE,
-    FIELD_IS_PLAYABLE
+    FIELD_IS_PLAYABLE,
+    FIELD_EXTRAS
   })
   private @interface FieldNumber {}
 
@@ -406,6 +423,7 @@ public final class MediaMetadata implements Bundleable {
   private static final int FIELD_TOTAL_TRACK_COUNT = 13;
   private static final int FIELD_FOLDER_TYPE = 14;
   private static final int FIELD_IS_PLAYABLE = 15;
+  private static final int FIELD_EXTRAS = 1000;
 
   @Override
   public Bundle toBundle() {
@@ -439,7 +457,9 @@ public final class MediaMetadata implements Bundleable {
     if (isPlayable != null) {
       bundle.putBoolean(keyForField(FIELD_IS_PLAYABLE), isPlayable);
     }
-
+    if (extras != null) {
+      bundle.putBundle(keyForField(FIELD_EXTRAS), extras);
+    }
     return bundle;
   }
 
@@ -458,7 +478,8 @@ public final class MediaMetadata implements Bundleable {
         .setDescription(bundle.getCharSequence(keyForField(FIELD_DESCRIPTION)))
         .setMediaUri(bundle.getParcelable(keyForField(FIELD_MEDIA_URI)))
         .setArtworkData(bundle.getByteArray(keyForField(FIELD_ARTWORK_DATA)))
-        .setArtworkUri(bundle.getParcelable(keyForField(FIELD_ARTWORK_URI)));
+        .setArtworkUri(bundle.getParcelable(keyForField(FIELD_ARTWORK_URI)))
+        .setExtras(bundle.getBundle(keyForField(FIELD_EXTRAS)));
 
     if (bundle.containsKey(keyForField(FIELD_USER_RATING))) {
       @Nullable Bundle fieldBundle = bundle.getBundle(keyForField(FIELD_USER_RATING));
diff --git a/library/common/src/test/java/com/google/android/exoplayer2/MediaMetadataTest.java b/library/common/src/test/java/com/google/android/exoplayer2/MediaMetadataTest.java
index 2ae13064c7..6f35ec7dd4 100644
--- a/library/common/src/test/java/com/google/android/exoplayer2/MediaMetadataTest.java
+++ b/library/common/src/test/java/com/google/android/exoplayer2/MediaMetadataTest.java
@@ -18,6 +18,7 @@ package com.google.android.exoplayer2;
 import static com.google.common.truth.Truth.assertThat;
 
 import android.net.Uri;
+import android.os.Bundle;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import com.google.android.exoplayer2.metadata.Metadata;
 import com.google.android.exoplayer2.metadata.id3.ApicFrame;
@@ -49,8 +50,11 @@ public class MediaMetadataTest {
     assertThat(mediaMetadata.overallRating).isNull();
     assertThat(mediaMetadata.artworkData).isNull();
     assertThat(mediaMetadata.artworkUri).isNull();
+    assertThat(mediaMetadata.trackNumber).isNull();
+    assertThat(mediaMetadata.totalTrackCount).isNull();
     assertThat(mediaMetadata.folderType).isNull();
     assertThat(mediaMetadata.isPlayable).isNull();
+    assertThat(mediaMetadata.extras).isNull();
   }
 
   @Test
@@ -80,6 +84,9 @@ public class MediaMetadataTest {
 
   @Test
   public void roundTripViaBundle_yieldsEqualInstance() {
+    Bundle extras = new Bundle();
+    extras.putString("exampleKey", "exampleValue");
+
     MediaMetadata mediaMetadata =
         new MediaMetadata.Builder()
             .setTitle("title")
@@ -88,12 +95,16 @@ public class MediaMetadataTest {
             .setUserRating(new HeartRating(false))
             .setOverallRating(new PercentageRating(87.4f))
             .setArtworkData(new byte[] {-88, 12, 3, 2, 124, -54, -33, 69})
+            .setTrackNumber(4)
+            .setTotalTrackCount(12)
             .setFolderType(MediaMetadata.FOLDER_TYPE_PLAYLISTS)
             .setIsPlayable(true)
+            .setExtras(extras) // Extras is not implemented in MediaMetadata.equals(Object o).
             .build();
 
     MediaMetadata fromBundle = MediaMetadata.CREATOR.fromBundle(mediaMetadata.toBundle());
     assertThat(fromBundle).isEqualTo(mediaMetadata);
+    assertThat(fromBundle.extras.getString("exampleKey")).isEqualTo("exampleValue");
   }
 
   @Test