HLS: Single alternative video renditions not working

[carlanton]

Have you read the FAQ and checked for duplicate open issues?
Yes.

What version of Shaka Player are you using?
4.3.0.

Can you reproduce the issue with our latest release version?
Yes.

Can you reproduce the issue with the latest code from main?
Yes.

Are you using the demo app or your own custom app?
Demo app.

If custom app, can you reproduce the issue using our demo app?

What browser and OS are you using?
Firefox & Chrome, OS X

For embedded devices (smart TVs, etc.), what model and firmware version are you using?

What are the manifest and license server URIs?

https://anton.lindstrom.io/hls/hls-alternative-video.m3u8

https://shaka-player-demo.appspot.com/demo/#audiolang=en-US;textlang=en-US;uilang=en-US;asset=https://anton.lindstrom.io/hls/hls-alternative-video.m3u8;panel=CUSTOM%20CONTENT;build=uncompiled

What configuration are you using? What is the output of player.getConfiguration()?

N/A

What did you do?

Hi!

We have HLS streams with a single alternate video rendition, like this:

#EXT-X-MEDIA:TYPE=VIDEO,GROUP-ID="video",NAME="Video",DEFAULT=YES,AUTOSELECT=YES

#EXT-X-STREAM-INF:BANDWIDTH=2778640,AVERAGE-BANDWIDTH=2324339,CODECS="avc1.4d401f,mp4a.40.2",RESOLUTION=1252x720,AUDIO="default-audio-group",VIDEO="video"
https://storage.googleapis.com/shaka-demo-assets/bbb-dark-truths-hls/playlist_v-0720p-2500k-libx264.mp4.m3u8

The streams works in Safari and hls.js, but shaka-player won't play it. We are using single alternate video renditions to be able to play the stream without video on certain players (iOS AVPlayer iirc).

What did you expect to happen?
I expect the stream to play.

What actually happened?

It does not :)

We get the error Shaka Error MANIFEST.CONTENT_UNSUPPORTED_BY_BROWSER. The firefox console hints that maybe shaka-player thinks that the video is using the audio codec string:

MediaCapabilities.decodingInfo() failed.
{
  "type": "media-source",
  "video": {
    "contentType": "audio/mp4; codecs=\"mp4a.40.2\"",
    "width": 1252,
    "height": 720,
    "bitrate": 2324339,
    "framerate": 1
  },
  "audio": {
    "contentType": "audio/mp4; codecs=\"mp4a.40.2\"",
    "channels": 2,
    "bitrate": 2324339,
    "samplerate": 1,
    "spatialRendering": false
  }
}

Thanks,
Anton