1806060 - Audio becomes out of sync after looping

Status: NEW

(Core :: Audio/Video: Playback, defect)

Description

[Jean-Yves Avenard [:jya]]

STR:
With a mac running Ventura 13.0 using a pair of AirPods (likely the same with any BT headset)

• Open https://www.facebook.com/reel/568877625001219/?s=ifu
• Unmute the video
• Let the video loop

What happens::
The audio is seriously out of sync after the loop

Expected:
Audio stays in sync.

Tested on Firefox 108

Comment 1

[Alastor Wu [:alwu]]

Fx 109 hasn't enabled video seamless looping (which will be enabled by default on 109), so this could be caused by other reasons. I can't reproduce this issue on Firefox 108 on OSX 12.2. I tried the video with/without using a bluetooth headset, both of them worked well on my side.

Jya, would you mind to use mozregression to see if this is a regression? Is this issue only happening when using bluetooth headset? Could you help me use the profiler by using media preset, and set MOZ_LOG=timestamp,MediaDecoder:5,AudioStream:5,MediaFormatReader:5 in about:networking#logging?

Thank you.

Comment 2

[Alastor Wu [:alwu]]

I updated my M1X to OSX 13.1, still no luck on reproducing this issue.

Comment 3

[Jim Mathies [:jimm]]

Maybe Paul has some thoughts. Thanks for reporting Jya!

Comment 4

[BugBot [:suhaib / :marco/ :calixte]]

Clear a needinfo that is pending on an inactive user.

Inactive users most likely will not respond; if the missing information is essential and cannot be collected another way, the bug maybe should be closed as INCOMPLETE.

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