diff --git a/library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/Atom.java b/library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/Atom.java
index 9c5de24b70..06eb14fbbd 100644
--- a/library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/Atom.java
+++ b/library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/Atom.java
@@ -176,6 +176,9 @@ import java.util.List;
   @SuppressWarnings("ConstantCaseForConstants")
   public static final int TYPE_ddts = 0x64647473;
 
+  @SuppressWarnings("ConstantCaseForConstants")
+  public static final int TYPE_udts = 0x75647473;
+
   @SuppressWarnings("ConstantCaseForConstants")
   public static final int TYPE_tfdt = 0x74666474;
 
diff --git 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
index 3a9cedf98a..633ea1d955 100644
--- 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
@@ -1560,7 +1560,7 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
         // because these streams can carry simultaneously multiple representations of the same
         // audio. Use stereo by default.
         channelCount = 2;
-      } else if (childAtomType == Atom.TYPE_ddts) {
+      } else if ((childAtomType == Atom.TYPE_ddts) || (childAtomType == Atom.TYPE_udts)) {
         out.format =
             new Format.Builder()
                 .setId(trackId)