diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index 84c933c52c..6af3381a34 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -16,6 +16,8 @@
   ([#5784](https://github.com/google/ExoPlayer/issues/5784)).
 * Add a workaround for a decoder failure on ZTE Axon7 mini devices when playing
   48kHz audio ([#5821](https://github.com/google/ExoPlayer/issues/5821)).
+* Add a workaround for broken raw audio decoding on Oppo R9
+  ([#5782](https://github.com/google/ExoPlayer/issues/5782)).
 
 ### 2.10.0 ###
 
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/mediacodec/MediaCodecInfo.java b/library/core/src/main/java/com/google/android/exoplayer2/mediacodec/MediaCodecInfo.java
index 08ba94f257..e79c776f88 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/mediacodec/MediaCodecInfo.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/mediacodec/MediaCodecInfo.java
@@ -51,13 +51,13 @@ public final class MediaCodecInfo {
   public final String name;
 
   /** The MIME type handled by the codec, or {@code null} if this is a passthrough codec. */
-  public final @Nullable String mimeType;
+  @Nullable public final String mimeType;
 
   /**
-   * The capabilities of the decoder, like the profiles/levels it supports, or {@code null} if this
-   * is a passthrough codec.
+   * The capabilities of the decoder, like the profiles/levels it supports, or {@code null} if not
+   * known.
    */
-  public final @Nullable CodecCapabilities capabilities;
+  @Nullable public final CodecCapabilities capabilities;
 
   /**
    * Whether the decoder supports seamless resolution switches.
@@ -109,11 +109,12 @@ public final class MediaCodecInfo {
    *
    * @param name The name of the {@link MediaCodec}.
    * @param mimeType A mime type supported by the {@link MediaCodec}.
-   * @param capabilities The capabilities of the {@link MediaCodec} for the specified mime type.
+   * @param capabilities The capabilities of the {@link MediaCodec} for the specified mime type, or
+   *     {@code null} if not known.
    * @return The created instance.
    */
-  public static MediaCodecInfo newInstance(String name, String mimeType,
-      CodecCapabilities capabilities) {
+  public static MediaCodecInfo newInstance(
+      String name, String mimeType, @Nullable CodecCapabilities capabilities) {
     return new MediaCodecInfo(
         name,
         mimeType,
@@ -128,7 +129,8 @@ public final class MediaCodecInfo {
    *
    * @param name The name of the {@link MediaCodec}.
    * @param mimeType A mime type supported by the {@link MediaCodec}.
-   * @param capabilities The capabilities of the {@link MediaCodec} for the specified mime type.
+   * @param capabilities The capabilities of the {@link MediaCodec} for the specified mime type, or
+   *     {@code null} if not known.
    * @param forceDisableAdaptive Whether {@link #adaptive} should be forced to {@code false}.
    * @param forceSecure Whether {@link #secure} should be forced to {@code true}.
    * @return The created instance.
@@ -136,7 +138,7 @@ public final class MediaCodecInfo {
   public static MediaCodecInfo newInstance(
       String name,
       String mimeType,
-      CodecCapabilities capabilities,
+      @Nullable CodecCapabilities capabilities,
       boolean forceDisableAdaptive,
       boolean forceSecure) {
     return new MediaCodecInfo(
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/mediacodec/MediaCodecUtil.java b/library/core/src/main/java/com/google/android/exoplayer2/mediacodec/MediaCodecUtil.java
index f275dfe7d7..f3936e5dc2 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/mediacodec/MediaCodecUtil.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/mediacodec/MediaCodecUtil.java
@@ -504,6 +504,16 @@ public final class MediaCodecUtil {
    */
   private static void applyWorkarounds(String mimeType, List<MediaCodecInfo> decoderInfos) {
     if (MimeTypes.AUDIO_RAW.equals(mimeType)) {
+      if (Util.SDK_INT < 26
+          && Util.DEVICE.equals("R9")
+          && decoderInfos.size() == 1
+          && decoderInfos.get(0).name.equals("OMX.MTK.AUDIO.DECODER.RAW")) {
+        // This device does not list a generic raw audio decoder, yet it can be instantiated by
+        // name. See <a href="https://github.com/google/ExoPlayer/issues/5782">Issue #5782</a>.
+        decoderInfos.add(
+            MediaCodecInfo.newInstance(
+                "OMX.google.raw.decoder", MimeTypes.AUDIO_RAW, /* capabilities= */ null));
+      }
       // Work around inconsistent raw audio decoding behavior across different devices.
       sortByScore(
           decoderInfos,
diff --git a/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/EnumerateDecodersTest.java b/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/EnumerateDecodersTest.java
index d256db8c30..e9d856015e 100644
--- a/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/EnumerateDecodersTest.java
+++ b/playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/EnumerateDecodersTest.java
@@ -20,12 +20,12 @@ import android.media.MediaCodecInfo.AudioCapabilities;
 import android.media.MediaCodecInfo.CodecCapabilities;
 import android.media.MediaCodecInfo.CodecProfileLevel;
 import android.media.MediaCodecInfo.VideoCapabilities;
+import androidx.annotation.Nullable;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import com.google.android.exoplayer2.mediacodec.MediaCodecInfo;
 import com.google.android.exoplayer2.mediacodec.MediaCodecUtil;
 import com.google.android.exoplayer2.mediacodec.MediaCodecUtil.DecoderQueryException;
 import com.google.android.exoplayer2.testutil.MetricsLogger;
-import com.google.android.exoplayer2.util.Assertions;
 import com.google.android.exoplayer2.util.MimeTypes;
 import com.google.android.exoplayer2.util.Util;
 import java.util.Arrays;
@@ -93,14 +93,17 @@ public class EnumerateDecodersTest {
     List<MediaCodecInfo> mediaCodecInfos =
         MediaCodecUtil.getDecoderInfos(mimeType, secure, tunneling);
     for (MediaCodecInfo mediaCodecInfo : mediaCodecInfos) {
-      CodecCapabilities capabilities = Assertions.checkNotNull(mediaCodecInfo.capabilities);
+      CodecCapabilities capabilities = mediaCodecInfo.capabilities;
       metricsLogger.logMetric(
           "capabilities_" + mediaCodecInfo.name, codecCapabilitiesToString(mimeType, capabilities));
     }
   }
 
   private static String codecCapabilitiesToString(
-      String requestedMimeType, CodecCapabilities codecCapabilities) {
+      String requestedMimeType, @Nullable CodecCapabilities codecCapabilities) {
+    if (codecCapabilities == null) {
+      return "[null]";
+    }
     boolean isVideo = MimeTypes.isVideo(requestedMimeType);
     boolean isAudio = MimeTypes.isAudio(requestedMimeType);
     StringBuilder result = new StringBuilder();