2 files changed, 6 insertions, 0 deletions
diff --git a/dom/media/webm/WebMDecoder.cpp b/dom/media/webm/WebMDecoder.cpp
index 5cb943742f..cbe9ffdb78 100644
--- a/dom/media/webm/WebMDecoder.cpp
+++ b/dom/media/webm/WebMDecoder.cpp
@@ -82,6 +82,10 @@ WebMDecoder::CanHandleMediaType(const nsACString& aMIMETypeExcludingCodecs,
       continue;
     }
 
+    if (IsAACCodecString(codec)) {
+      continue;
+    }
+
     // Some unsupported codec.
     return false;
   }
diff --git a/dom/media/webm/WebMDemuxer.cpp b/dom/media/webm/WebMDemuxer.cpp
index 2b6d46186f..84b4b506e4 100644
--- a/dom/media/webm/WebMDemuxer.cpp
+++ b/dom/media/webm/WebMDemuxer.cpp
@@ -422,6 +422,8 @@ WebMDemuxer::ReadMetadata()
         mInfo.mAudio.mMimeType = "audio/opus";
         OpusDataDecoder::AppendCodecDelay(mInfo.mAudio.mCodecSpecificConfig,
             media::TimeUnit::FromNanoseconds(params.codec_delay).ToMicroseconds());
+      } else if (mAudioCodec == NESTEGG_CODEC_AAC) {
+        mInfo.mAudio.mMimeType = "audio/mp4a-latm";
       }
       mSeekPreroll = params.seek_preroll;
       mInfo.mAudio.mRate = params.rate;