diff --git a/libraries/transformer/src/main/java/androidx/media3/transformer/EncoderUtil.java b/libraries/transformer/src/main/java/androidx/media3/transformer/EncoderUtil.java
index aceb651236..8c17b14a90 100644
--- a/libraries/transformer/src/main/java/androidx/media3/transformer/EncoderUtil.java
+++ b/libraries/transformer/src/main/java/androidx/media3/transformer/EncoderUtil.java
@@ -125,6 +125,7 @@ public final class EncoderUtil {
         if (colorTransfer == C.COLOR_TRANSFER_HLG) {
           return ImmutableList.of(MediaCodecInfo.CodecProfileLevel.AVCProfileHigh10);
         }
+        // CodecProfileLevel does not support PQ/HDR10 for H264.
         break;
       case MimeTypes.VIDEO_H265:
         if (colorTransfer == C.COLOR_TRANSFER_HLG) {