[Webkit-unassigned] [Bug 212472] New: When playing encrypted HLS, video and audio are out of sync gradually.
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Thu May 28 09:05:17 PDT 2020
https://bugs.webkit.org/show_bug.cgi?id=212472
Bug ID: 212472
Summary: When playing encrypted HLS, video and audio are out of
sync gradually.
Product: WebKit
Version: Safari 13
Hardware: iPhone / iPad
OS: iOS 13
Status: NEW
Severity: Normal
Priority: P2
Component: Media
Assignee: webkit-unassigned at lists.webkit.org
Reporter: yuta.naito at play.jp
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
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