diff --git a/library/core/src/main/java/com/google/android/exoplayer2/metadata/scte35/PrivateCommand.java b/library/core/src/main/java/com/google/android/exoplayer2/metadata/scte35/PrivateCommand.java
index 4334fa99cb2..44850b720f6 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/metadata/scte35/PrivateCommand.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/metadata/scte35/PrivateCommand.java
@@ -18,6 +18,7 @@
 import android.os.Parcel;
 import android.os.Parcelable;
 import com.google.android.exoplayer2.util.ParsableByteArray;
+import com.google.android.exoplayer2.util.Util;
 
 /**
  * Represents a private command as defined in SCTE35, Section 9.3.6.
@@ -46,8 +47,7 @@ private PrivateCommand(long identifier, byte[] commandBytes, long ptsAdjustment)
   private PrivateCommand(Parcel in) {
     ptsAdjustment = in.readLong();
     identifier = in.readLong();
-    commandBytes = new byte[in.readInt()];
-    in.readByteArray(commandBytes);
+    commandBytes = Util.castNonNull(in.createByteArray());
   }
 
   /* package */ static PrivateCommand parseFromSection(ParsableByteArray sectionData,
@@ -64,7 +64,6 @@ private PrivateCommand(Parcel in) {
   public void writeToParcel(Parcel dest, int flags) {
     dest.writeLong(ptsAdjustment);
     dest.writeLong(identifier);
-    dest.writeInt(commandBytes.length);
     dest.writeByteArray(commandBytes);
   }
 
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/offline/DownloadRequest.java b/library/core/src/main/java/com/google/android/exoplayer2/offline/DownloadRequest.java
index 7ff43ceacde..988b908140d 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/offline/DownloadRequest.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/offline/DownloadRequest.java
@@ -100,8 +100,7 @@ public DownloadRequest(
     }
     streamKeys = Collections.unmodifiableList(mutableStreamKeys);
     customCacheKey = in.readString();
-    data = new byte[in.readInt()];
-    in.readByteArray(data);
+    data = castNonNull(in.createByteArray());
   }
 
   /**
@@ -194,7 +193,6 @@ public void writeToParcel(Parcel dest, int flags) {
       dest.writeParcelable(streamKeys.get(i), /* parcelableFlags= */ 0);
     }
     dest.writeString(customCacheKey);
-    dest.writeInt(data.length);
     dest.writeByteArray(data);
   }
 
diff --git a/library/core/src/test/java/com/google/android/exoplayer2/metadata/MetadataRendererTest.java b/library/core/src/test/java/com/google/android/exoplayer2/metadata/MetadataRendererTest.java
index 1ad0ce6b79f..97e9a756861 100644
--- a/library/core/src/test/java/com/google/android/exoplayer2/metadata/MetadataRendererTest.java
+++ b/library/core/src/test/java/com/google/android/exoplayer2/metadata/MetadataRendererTest.java
@@ -12,7 +12,6 @@
  * 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.metadata;
 
diff --git a/library/core/src/test/java/com/google/android/exoplayer2/metadata/MetadataTest.java b/library/core/src/test/java/com/google/android/exoplayer2/metadata/MetadataTest.java
new file mode 100644
index 00000000000..8331bce9471
--- /dev/null
+++ b/library/core/src/test/java/com/google/android/exoplayer2/metadata/MetadataTest.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2019 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.metadata;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.os.Parcel;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import com.google.android.exoplayer2.metadata.id3.BinaryFrame;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+/** Tests for {@link Metadata}. */
+@RunWith(AndroidJUnit4.class)
+public class MetadataTest {
+
+  @Test
+  public void testParcelable() {
+    Metadata metadataToParcel =
+        new Metadata(
+            new BinaryFrame("id1", new byte[] {1}), new BinaryFrame("id2", new byte[] {2}));
+
+    Parcel parcel = Parcel.obtain();
+    metadataToParcel.writeToParcel(parcel, 0);
+    parcel.setDataPosition(0);
+
+    Metadata metadataFromParcel = Metadata.CREATOR.createFromParcel(parcel);
+    assertThat(metadataFromParcel).isEqualTo(metadataToParcel);
+
+    parcel.recycle();
+  }
+}