Closed Bug 1279624 Opened 7 years ago Closed 7 years ago

Amazon's Widevine-encrypted streams have AV sync issues

Categories

(Core :: Audio/Video: Playback, defect, P1)

Product:
Core
Component:
Audio/Video: Playback
Type:
defect

Tracking

()

Status:
RESOLVED DUPLICATE of bug 1258870
Tracking Flags:
Tracking Status
platform-rel --- ?
firefox47 --- affected
firefox48 --- affected
firefox49 --- affected
firefox50 --- affected

People

(Reporter: cpeterson, Unassigned)

Details

(Whiteboard: [platform-rel-Amazon][platform-rel-AmazonVideo]) 

Some Amazon users are reporting AV sync issues with Widevine content. Mairo says he has managed to reproduce it by having a pretty heavy CPU load, while playing 1080p content.

I can reproduce AV sync problems when watching the scene at time 31:00 in THE MAN IN THE HIGH CASTLE when building Firefox (mach build -j 16):

https://www.amazon.com/dp/B00RSGIVVO/

Under heavy load, Chrome pauses both the audio and video. In Firefox, the video starts stuttering but continues playing the audio. The audio and video appear a couple hundred milliseconds out of sync. When I kill the load, the audio and video eventually synchronize after about 5–10 seconds.
I can reproduce this in Firefox 47 and Nightly 50 on OS X.
status-firefox48: ? → affected
status-firefox49: ? → affected
status-firefox50: ? → affected
Priority: -- → P1
I tested this ($0) YouTube Widevine video under heavy load, but it had no AV sync issues. Perhaps this is an encoding issue?

https://www.youtube.com/watch?v=W6E7CGm12tA
platform-rel: --- → ?
Whiteboard: [platform-rel-Amazon][platform-rel-AmazonVideo]
Status: NEW → RESOLVED
Closed: 7 years ago
Resolution: --- → DUPLICATE
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