1182056 - [Ubuntu] Jerky video playback in fullscreen mode

Status: RESOLVED WONTFIX

(Core Graveyard :: Plug-ins, defect)

Description

[Vasilica Tamas, QA [:vtamas]]

Reproducible on: Firefox 42.0a1, Firefox 41.0a2 and Firefox 40 Beta 2


STR
1. Launch Firefox with clean profile.
2. Navigate to http://www.comingsoon.net/tv/trailers/457867-supergirl-promo-the-cbs-series-is-here-to-save-the-day#/slide/1
3. Wait a few seconds to appear the video.
4. Enter the video in fullscreen mode and hit the Play button.

ER
The video is played without any issues.

AR
The video playback is jerky in fullscreen mode.


Additional notes:
- This issue is reproducible on Firefox 42.0a1 (2015-07-09), Firefox 41.0a2 (2015-07-09) and Firefox 40 beta 2 (20150706172413) under Ubuntu 14.04 32-bit.
- This issue reproduces only with this embedded video.
- No errors are thrown in Browser Console.
- Not reproducible on Windows and Mac.
- Not reproducible using Google Chrome.

Comment 1

[Jean-Yves Avenard [:jya]]

Are you using ffmpeg or gstreamer?
What version?

Comment 2

[Ralph Giles (:rillian)]

Can you please, confirm whether this is fixed in 43 with ffmpeg installed on the system?

Comment 3

[Vasilica Tamas, QA [:vtamas]]

(In reply to Ralph Giles (:rillian) from comment #2)
> Can you please, confirm whether this is fixed in 43 with ffmpeg installed on
> the system?

Unfortunately, I was able to reproduce this issue on Firefox 43 beta 6 (20151123113812) with ffmpeg installed on the system. 

Also, an important thing to mention would be the video quality difference between Chrome and Firefox:
  - Firefox: http://i.imgur.com/vTdLoPv.png
  - Chrome: http://i.imgur.com/WQpeXZe.png

(The video was played in Fullscreen mode, with HD enabled)

Comment 4

[Jean-Yves Avenard [:jya]]

Can you do right-click Stats for Nerds and post the content?

Comment 5

[Vasilica Tamas, QA [:vtamas]]

(In reply to Jean-Yves Avenard [:jya] from comment #4)
> Can you do right-click Stats for Nerds and post the content?

I do not have Stats for Nerds because this video uses Flash plugin (11.2.202.548)

Comment 6

[Ralph Giles (:rillian)]

Ok. We're hoping flash will be replaced with MSE over the next few releases. Should be better in 43. In any case, we won't look at it.