False positives in demo audio-only asset detection.

[joeyparrish]

• What version of Shaka Player are you using? master
• Are you using the demo app or your own custom app? demo app
• What browser and OS are you using? Chrome on Mac
• What did you do?

Load any asset.

• What actually happened?

The audio-only poster was briefly visible between clicking "load" and playback starting.

Could be a race between load() resolution and getVariantTracks().

[theodab]

This is not actually be a race condition. Instead, it's an issue with the logic for detecting audio-only assets; we currently check if a track is video or audio by the presence of a 'width' variable, but the resolution attribute in HLS is optional so some manifests might not contain in. In such manifests, we are mis-identifying video streams as being audio.

[joeyparrish]

As discussed offline, let's use the newly-added videoCodec field of Track to identify variants with video.

[joeyparrish]

This fix was just released in v2.1.2.