Missing metadata event with timed ID3 data in HLS stream from Telos Z/IPStream X/2 encoder

[pszemus]

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

What version of Shaka Player are you using?
v3.2.1 (uncompiled)

Can you reproduce the issue with our latest release version?
yes

Can you reproduce the issue with the latest code from master?
didn't try

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

What browser and OS are you using?
Google Chrome 96.0.4664.45

What are the manifest and license server URIs?
https://wptv-devel.wpcdn.pl/open.fm/S04-HLS1-httpLS.m3u8

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

What did you do?
In demo app:

1. start playing https://wptv-devel.wpcdn.pl/open.fm/S04-HLS1-httpLS.m3u8
2. add metadata event listener: shakaDemoMain.player_.addEventListener('metadata', (e) => {console.log("[t: " + shakaDemoMain.player_.getMediaElement().currentTime + "] MetadataEvent event", e);});

What did you expect to happen?

After about 1 minute of playing there should be 2 metadata events.
Hls.js shows them correctly:

What actually happened?
No metadata event fired.

[TheModMaker]

I don't think we support the metadata event ourselves. We technically do on Safari since the browser does it for us; but when playing ourselves, I don't think we handle the metadata events/data. We'll keep this as an enhancement to add this.

[pszemus]

@TheModMaker I can send you a sample HLS stream (from Wowza Streaming Engine) where metadata event is published in Chrome.

[avelad]

Your stream uses TS, and it seems like mux.js says it has metadata with dispatchType = 15, but it doesn't return no data or frames. I suggest you look at the logic of mux.js to see what is happening (https://github.com/videojs/mux.js/blob/main/lib/m2ts/metadata-stream.js).

[avelad]

mux.js PR --> videojs/mux.js#408

[joeyparrish]

I pinged the mux.js PR today to see if we can get the fix merged there.