diff --git a/extensions/opus/src/main/java/com/google/android/exoplayer/ext/opus/LibopusAudioTrackRenderer.java b/extensions/opus/src/main/java/com/google/android/exoplayer/ext/opus/LibopusAudioTrackRenderer.java
index b5c3bd6295..f444e9b2d9 100644
--- a/extensions/opus/src/main/java/com/google/android/exoplayer/ext/opus/LibopusAudioTrackRenderer.java
+++ b/extensions/opus/src/main/java/com/google/android/exoplayer/ext/opus/LibopusAudioTrackRenderer.java
@@ -15,6 +15,7 @@
  */
 package com.google.android.exoplayer.ext.opus;
 
+import com.google.android.exoplayer.CodecCounters;
 import com.google.android.exoplayer.ExoPlaybackException;
 import com.google.android.exoplayer.ExoPlayer;
 import com.google.android.exoplayer.MediaClock;
@@ -75,6 +76,8 @@ public final class LibopusAudioTrackRenderer extends SampleSourceTrackRenderer
    */
   public static final int MSG_SET_VOLUME = 1;
 
+  public final CodecCounters codecCounters = new CodecCounters();
+
   private final Handler eventHandler;
   private final EventListener eventListener;
   private final MediaFormatHolder formatHolder;
@@ -191,6 +194,7 @@ public final class LibopusAudioTrackRenderer extends SampleSourceTrackRenderer
         throw new ExoPlaybackException(e);
       }
       decoder.start();
+      codecCounters.codecInitCount++;
     }
 
     // Rendering loop.
@@ -207,6 +211,7 @@ public final class LibopusAudioTrackRenderer extends SampleSourceTrackRenderer
       notifyDecoderError(e);
       throw new ExoPlaybackException(e);
     }
+    codecCounters.ensureUpdated();
   }
 
   private void renderBuffer() throws OpusDecoderException, AudioTrack.InitializationException,
@@ -253,6 +258,7 @@ public final class LibopusAudioTrackRenderer extends SampleSourceTrackRenderer
     // Release the buffer if it was consumed.
     if ((handleBufferResult & AudioTrack.RESULT_BUFFER_CONSUMED) != 0) {
       decoder.releaseOutputBuffer(outputBuffer);
+      codecCounters.renderedOutputBufferCount++;
       outputBuffer = null;
     }
   }
@@ -372,6 +378,7 @@ public final class LibopusAudioTrackRenderer extends SampleSourceTrackRenderer
       if (decoder != null) {
         decoder.release();
         decoder = null;
+        codecCounters.codecReleaseCount++;
       }
       audioTrack.release();
     } finally {
diff --git a/extensions/vp9/src/main/java/com/google/android/exoplayer/ext/vp9/LibvpxVideoTrackRenderer.java b/extensions/vp9/src/main/java/com/google/android/exoplayer/ext/vp9/LibvpxVideoTrackRenderer.java
index a60f508921..fbd64f9940 100644
--- a/extensions/vp9/src/main/java/com/google/android/exoplayer/ext/vp9/LibvpxVideoTrackRenderer.java
+++ b/extensions/vp9/src/main/java/com/google/android/exoplayer/ext/vp9/LibvpxVideoTrackRenderer.java
@@ -192,6 +192,7 @@ public final class LibvpxVideoTrackRenderer extends SampleSourceTrackRenderer {
     if (decoder == null) {
       decoder = new VpxDecoderWrapper(outputMode);
       decoder.start();
+      codecCounters.codecInitCount++;
     }
 
     // Rendering loop.
@@ -202,6 +203,7 @@ public final class LibvpxVideoTrackRenderer extends SampleSourceTrackRenderer {
       notifyDecoderError(e);
       throw new ExoPlaybackException(e);
     }
+    codecCounters.ensureUpdated();
   }
 
   private void processOutputBuffer(long positionUs, long elapsedRealtimeUs)
@@ -406,6 +408,7 @@ public final class LibvpxVideoTrackRenderer extends SampleSourceTrackRenderer {
       if (decoder != null) {
         decoder.release();
         decoder = null;
+        codecCounters.codecReleaseCount++;
       }
     } finally {
       super.onDisabled();