MediaSource video freezes after switching to a different tab and back
Reported by
grigoryy...@gmail.com,
Jan 30 2018
|
|||||
Issue description
UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.119 Safari/537.36
Steps to reproduce the problem:
1. sourceBuffer = mediaSource.addSourceBuffer('video/mp4; codecs="avc1.64001E"');
2. append to buffer frames without timestamps (real-time video).
3. While it plays, switch to a different Chrome tab.
4. Then switch back to the video tab.
What is the expected behavior?
The video continues to play normally.
What went wrong?
The video freezes for several seconds, then continues to play normally.
Did this work before? No
Does this work in other browsers? Yes
Chrome version: 64.0.3282.119 Channel: stable
OS Version: 10.0
Flash Version:
Attached is the HTML we used and the performance log demonstrating the problem.
I can see in log that JavaScript continues to execute while the tab is in background, adding new frames to the MediaSource buffer.
In the performance log there's a visible gap (no frames displayed) while the tab is in background. Then it shows a few frames, and then there's another gap. During the second gap the tab is in foreground but the video is 'frozen'.
,
Jan 30 2018
,
Jan 30 2018
Does this happen in canary? Some changes around low latency behavior may be the cause.
,
Jan 31 2018
,
Jan 31 2018
This is happening for several months at least, latest canaries didn't affect the behavior. It looks like the video tries to skip ahead when the focus returns, but this takes unexpectedly long time.
,
Jan 31 2018
Attached sample doesn't load for me so I can't test this out. It's expected that we'll disable the video track in the background after some time, when foreground focus is resumed it should happen quickly < 1 second or so. Can you include the chrome://media-internals log for the player?
,
Feb 1 2018
Adding Needs-Feedback label as per comment#6. @Reporter: Could you please respond to C#6. Thanks!
,
Mar 6 2018
no response from reporter@, resolve s won't fix. |
|||||
►
Sign in to add a comment |
|||||
Comment 1 by grigoryy...@gmail.com
, Jan 30 2018