1373827 - Video playback is very janky + unresponsive Firefox

Status: RESOLVED WORKSFORME

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

Description

[David Teller [:Yoric] - still alive but not very active]

On OSX, using Nightly, my current experience with video playback is really poor.

Symptoms:
- after a few seconds, jank appears;
- Firefox seems to miss events, badly – it can take 10+ seconds between the instant I click to pause and the instant the playback actually pauses.

Example:
http://www.extralife.fr/news-jv/16237/spider-man-comme-un-air-darkham.html

(plays nicely with Opera)

Comment 1

[Ben Kelly [:bkelly, not reviewing]]

Dupe?

Comment 2

[Jean-Yves Avenard [:jya]]

(In reply to Ben Kelly [reviewing, but slowly][:bkelly] from comment #1)
> Dupe?

don't believe so, different platforms to start with.

Can't reproduce on my OS X laptop (a 2012 macbook air) even with the 1080p stream

Comment 3

[Jean-Yves Avenard [:jya]]

This doesn't appear to me to be a playback issue, but an overall performance one. What's the CPU usage, any chance of doing a profiling here?

Comment 4

[David Teller [:Yoric] - still alive but not very active]

I tried capturing a profile, but I probably hit the wrong process because it didn't show anything meaningful.

Also, cannot reproduce with the latest Nightly, so I guess RESOLVED WFM.