5.1 channel AAC audio in m2ts is not working

[lagomcoder]

What version of Hls.js are you using?

v1.6.15

What browser (including version) are you using?

Zen 1.18.6b (Firefox 147.0.3) (64-bit), Chrome Version 144.0.7559.132 (Official Build) Built from source for Fedora release 43 (Forty Three) (64-bit)

What OS (including version) are you using?

Linux

Test stream

https://download.blender.org/peach/bigbuckbunny_movies/big_buck_bunny_480p_surround.avi

Configuration

{
  "debug": true,
  "enableWorker": true,
  "lowLatencyMode": true,
  "backBufferLength": 90
}

Additional player setup steps

No response

Checklist

• The issue observed is not already reported by searching on Github under https://github.com/video-dev/hls.js/issues
• The issue occurs in the stable client (latest release) on https://hlsjs.video-dev.org/demo and not just on my page
• The issue occurs in the latest client (main branch) on https://hlsjs-dev.video-dev.org/demo and not just on my page
• The stream has correct Access-Control-Allow-Origin headers (CORS)
• There are no network errors such as 404s in the browser console when trying to play the stream

Steps to reproduce

curl https://download.blender.org/peach/bigbuckbunny_movies/big_buck_bunny_720p_surround.avi --output bigbuck.avi
ffmpeg -i bigbuck.avi -map 0:v:0 -map 0:a:0 -c:v libx264 -c:a aac -hls_time 5 -hls_playlist_type vod -hls_segment_filename 'segment_%03d.ts' master.m3u8
npx serve --cors -l 3123 .
open https://hlsjs.video-dev.org/demo/?src=http%3A%2F%2Flocalhost%3A3123%2Fmaster.m3u8&demoConfig=eyJlbmFibGVTdHJlYW1pbmciOnRydWUsImF1dG9SZWNvdmVyRXJyb3IiOnRydWUsInN0b3BPblN0YWxsIjp0cnVlLCJkdW1wZk1QNCI6ZmFsc2UsImxldmVsQ2FwcGluZyI6LTEsImxpbWl0TWV0cmljcyI6LTF9

With -ac 2 for ffmpeg encoding command error is gone.

Expected behaviour

No buffer errors, correct playback or at least error with "surround audio is not supported".

What actually happened?

appendBuffer error.

Console output

{
  "type": "mediaError",
  "parent": "main",
  "details": "bufferAppendError",
  "sourceBufferName": "audio",
  "frag": {
    "_byteRange": null,
    "_url": "http://localhost:3123/segment_000.ts",
    "_stats": {
      "aborted": false,
      "loaded": 2971528,
      "retry": 0,
      "total": 2971528,
      "chunkCount": 1,
      "bwEstimate": 5943056000,
      "loading": {
        "start": 5800,
        "first": 5806,
        "end": 5810
      },
      "parsing": {
        "start": 5810,
        "end": 0
      },
      "buffering": {
        "start": 5819,
        "first": 0,
        "end": 0
      }
    },
    "_streams": {
      "audio": {
        "startPTS": 0,
        "endPTS": 10.368,
        "startDTS": 0,
        "endDTS": 10.368,
        "partial": false
      },
      "video": {
        "startPTS": 0.021333333333333333,
        "endPTS": 10.438,
        "startDTS": -0.062,
        "endDTS": 10.354666666666667,
        "partial": false
      },
      "audiovideo": null
    },
    "base": {
      "url": "http://localhost:3123/master.m3u8"
    },
    "relurl": "segment_000.ts",
    "stats": {
      "aborted": false,
      "loaded": 2971528,
      "retry": 0,
      "total": 2971528,
      "chunkCount": 1,
      "bwEstimate": 5943056000,
      "loading": {
        "start": 5800,
        "first": 5806,
        "end": 5810
      },
      "parsing": {
        "start": 5810,
        "end": 0
      },
      "buffering": {
        "start": 5819,
        "first": 0,
        "end": 0
      }
    },
    "_decryptdata": null,
    "_programDateTime": null,
    "_ref": null,
    "rawProgramDateTime": null,
    "tagList": [
      [
        "INF",
        "10.416667"
      ]
    ],
    "duration": 10.416667,
    "sn": 0,
    "type": "main",
    "loader": null,
    "keyLoader": null,
    "level": 0,
    "cc": 0,
    "start": 0,
    "playlistOffset": 0,
    "bitrateTest": false,
    "title": null,
    "initSegment": null,
    "urlId": 0
  },
  "part": null,
  "chunkMeta": {
    "level": 0,
    "sn": 0,
    "part": -1,
    "id": 1,
    "size": 2971528,
    "partial": false,
    "transmuxing": {
      "start": 5810,
      "executeStart": 327,
      "executeEnd": 335,
      "end": 5818
    },
    "buffering": {
      "audio": {
        "start": 5831,
        "executeStart": 5819,
        "executeEnd": 0,
        "end": 0
      },
      "video": {
        "start": 5828,
        "executeStart": 5824,
        "executeEnd": 0,
        "end": 0
      },
      "audiovideo": {
        "start": 0,
        "executeStart": 0,
        "executeEnd": 0,
        "end": 0
      }
    }
  },
  "error": {},
  "err": {},
  "fatal": true
}

[lagomcoder]

on the https://hlsjs-dev.video-dev.org/demo I got:

warn] > [buffer-controller]: Error: MediaSource closed while media attached - triggering recovery with HTMLMediaElement Error: PipelineStatus::CHUNK_DEMUXER_ERROR_APPEND_FAILED: RunSegmentParserLoop: stream parsing failed. append_window_start=0 append_window_end=inf
    at BufferController._this2._onMediaSourceClose (buffer-controller.ts:1638:21)

[robwalch]

Please share an HLS asset, not the encoding instructions, used to reproduce the issue.