Paella Player default livestream config leads to playback issues

[reiferschris]

Describe the bug Audio issues like stuttering and jumps in the video occur with this config.

https://github.com/opencast-ilias/OpenCast/blob/release_7/js/opencast/src/Paella/config/config.json#L194-L205 Some of the lines in the hlsLiveVideoFormat can lead to playback issues, :

• maxBufferLength has a default of 30 s and defines when to fetch new fragments https://github.com/video-dev/hls.js/blob/master/docs/API.md#maxbufferlength I think we should stick with the default in this case
• "liveSyncDuration": 3 is simply not the right config, it should probably be https://github.com/video-dev/hls.js/blob/master/docs/API.md#livesyncdurationcount instead of https://github.com/video-dev/hls.js/blob/master/docs/API.md#livesyncduration the current config option defines the seconds instead of number of fragments. So 3 seconds is likely half of a fragment which is not ideal. For "liveSyncDurationCount": 3 is the default, so we could ommit this setting here.
• "liveMaxLatencyDuration": 6 should not be used together with `liveSyncDurationCount or other similiar settings: https://github.com/video-dev/hls.js/blob/master/docs/API.md#livemaxlatencyduration
• "highBufferWatchdogPeriod": 1 has a default of 3 s, I think we should also keep it that way https://github.com/video-dev/hls.js/blob/master/docs/API.md#highbufferwatchdogperiod

To Reproduce Steps to reproduce the behavior:

1. Create a livestream
2. watch the livestream
3. look out for playback issues, jumps or stuttering audio

Expected behavior Livestream plays without issues and no stuttering especially in the audio track

Environment (please complete the following information):

• ILIAS version: [e.g. v7.30]
• PHP version: [e.g. PHP 7.4.3]
• Plugin version: [e.g. release_7]
• Opencast version [e.g 13.x]
• Browser: [firefox]

Additional context Add any other context about the problem here.