Bug 212472 - When playing encrypted HLS, video and audio are out of sync gradually.
Summary: When playing encrypted HLS, video and audio are out of sync gradually.
Status: RESOLVED DUPLICATE of bug 212131
Alias: None
Product: WebKit
Classification: Unclassified
Component: Media (show other bugs)
Version: Safari 13
Hardware: iPhone / iPad iOS 13
: P2 Normal
Assignee: Nobody
URL:
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2020-05-28 09:05 PDT by Yuta Naito
Modified: 2020-05-31 21:03 PDT (History)
4 users (show)

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Description Yuta Naito 2020-05-28 09:05:17 PDT 
I found the issue that  video and audio are out of sync gradually when playing encrypted HLS on iOS 13.4、13.5 Safari and macOS Safari (13.1).
When playback starts, the video and audio are synchronized, but they gradually start to misalign video and audio.

It does not happen under the following conditions
・ Under iOS 13.3 
・ Unencrypted HLS
・ Playback with MSE Player (e.g. hls.js)

It's a sample page :  
https://d29c8ds76t1544.cloudfront.net/dev_player/audio_sync/sample_video.html
Comment 1 Radar WebKit Bug Importer 2020-05-28 18:52:03 PDT 
<rdar://problem/63741719>
Comment 2 Nonthawat Srichad 2020-05-29 00:02:01 PDT 
Hi,

we found the same issue here https://bugs.webkit.org/show_bug.cgi?id=212131
Comment 3 Yuta Naito 2020-05-31 21:03:32 PDT 
Hi, Nonthawat 

Thanks for finding same issue. 
I change status because this issue is duprecated .

*** This bug has been marked as a duplicate of bug 212131 ***