Audio/Video synchronization issue

[pszemus]

What version of Shaka Player are you using:
v2.2.6-debug

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

Can you reproduce the issue with the latest code from master:
didn't check

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

What browser and OS are you using:
Chrome 62.0.3202.94 (official) (64-bit) @ Fedora 26

What are the manifest and license server URIs:
sent to shaka-player-issues@google.com as it should not be distributed to public

What did you do?
played the stream and waited for more than 5 minutes

What did you expect to happen?
no audio/video synchronization problems

What actually happened?
audio/video synchronization issue (video delay that grows)

I've got a source multicast stream that's being transcoded by Wowza Streaming Engine and packaged into DASH stream. After playing the transcoded DASH stream for more than 5 minutes I can see/hear an audio/video delay that grows over time. I think it can be related with UDP frame drops that happens occasionally with the source stream. Restarting the playback helps for a while but after another few mintues this problem comes back. Can something be done on the player's side or it's a browser / Wowza / source stream issue?

[TheModMaker]

This looks similar to #707. There isn't really anything Shaka Player can do to help. All we do is give the media segments to the browser, it is up to the browser to play them correctly. This is likely a problem with the media segments. This is probably a better question for the Wowza team (https://www.wowza.com/support).

[joeyparrish]

@pszemus, if you can link us to a public support discussion so we can understand what went wrong, that would be great. If not, could you provide some update here once this is resolved with Wowza? That way future Shaka Player users will have a hint about what it took to resolve this issue. Thanks!

[pszemus]

I've created a question in Wowza Streaming Engine forum that's read by the support team, let's wait and see what happens.
https://www.wowza.com/community/questions/46529/audiovideo-synchronization-issue-on-multicast-fram.html

[joeyparrish]

Thanks!

[TheModMaker]

Two and a half years later, no response on their forum. Going to close since it's not our fault and there isn't anything we can do.