1988676 - BaseAudioContext: decodeAudioData() does not decode Opus in video/x-matroska

Status: RESOLVED DUPLICATE of bug 1988848

(Core :: Audio/Video: Playback, defect)

Description

[guest271314]

Attachment: mkv.html

User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36

Steps to reproduce:

See attached HTML and MKV files.

<script type="module">
  var ac = new AudioContext({ sampleRate: 22050 });
  var mediaElement = document.createElement("video");
  mediaElement.controls = true;
  mediaElement.autoplay = true;
  document.body.appendChild(mediaElement);
  const blob = await fetch(
    "./test_matroska_audio.mkv",
  )
    .then((response) => {
      console.log(response.headers.get("content-type"));
      return response.blob();
    });
  console.log(blob);
  var buffer = await blob.arrayBuffer();
  mediaElement.onloadedmetadata = (e) => {
    console.log(e);
  };
  mediaElement.onerror = async (e) => {
    console.log(e, blob.type);
    const ab = await ac.decodeAudioData(buffer).catch((e) =>
      `${e.name} ${e.message}`
    );
    console.log(ab);
  };
  mediaElement.onloadedmetadata = async (e) => {
    console.log(e, blob.type);
    const ab = await ac.decodeAudioData(buffer);
    console.log(ab);
  };
  mediaElement.src = URL.createObjectURL(blob);
</script>

Actual results:

EncodingError The buffer passed to decodeAudioData contains invalid content which cannot be decoded successfully.

Expected results:

Chromium 142

AudioBuffer {length: 34615, duration: 1.5698412698412698, sampleRate: 22050, numberOfChannels: 1}

Comment 1

[guest271314]

Attachment: Opus encoded with opusenc from opus-tools 0.1.10 written to Matroska by mkvmerge v60.0.0 ('Are We Copies?') 64-bit

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Core::Audio/Video: Playback' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 3

[Masatoshi Kimura [:emk]]

Fixed by bug 1988848.