[Bug 931114] [NEW] Regression in html5 video support in FF 10 & 11

[zeitkunst]

Public bug reported:

I have observed a regression in HTML5 video support in Firefox 10 and
11.  With Firefox 9, HTML5 videos encoded in either Theora or webm
played flawlessly.  With Firefox 10 and 11, the video component will
randomly stop playing, while the audio component will continue.  This
occurs no matter if I'm watching the video in a window or fullscreen.
I've observed this on locally-produced HTML pages as well as the HTML5
test videos on the Kaltura site.  Note that my audio is being routed
through jack, which might explain why the audio continues playing while
the video stops.  Firefox itself does not become unresponsive, however
the HTML5 component does.

This is a severe regression for me and makes it impossible to embed
HTML5 videos in the HTML presentations I produce.

What I expect to happen: HTML5 videos encoded in Ogg Theora/webm to play
flawlessly

What actually happens: HTML5 videos encoded in Ogg Theora/webm randomly
stop playing

Description:    Ubuntu 11.04
Release:        11.04

firefox:
  Installed: 10.0+build1-0ubuntu0.11.04.1
  Candidate: 10.0+build1-0ubuntu0.11.04.1
  Version table:
 *** 10.0+build1-0ubuntu0.11.04.1 0
        500 http://us.archive.ubuntu.com/ubuntu/ natty-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu/ natty-security/main amd64 Packages
        100 /var/lib/dpkg/status
     4.0+nobinonly-0ubuntu3 0
        500 http://us.archive.ubuntu.com/ubuntu/ natty/main amd64 Packages

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: firefox 10.0+build1-0ubuntu0.11.04.1
ProcVersionSignature: Ubuntu 3.0.0-12.20ppa1~natty1-lowlatency 3.0.4
Uname: Linux 3.0.0-12-lowlatency x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
BuildID: 20120129142603
Date: Sun Feb 12 14:42:39 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu-Studio 10.10 "Maverick Meerkat" - Release amd64 (20101008)
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LANG=en_US.UTF-8
 LANGUAGE=
Profile0Extensions: extensions.sqlite corrupt or missing
Profile0Locales: extensions.sqlite corrupt or missing
Profile0Themes: extensions.sqlite corrupt or missing
SourcePackage: firefox
UpgradeStatus: Upgraded to natty on 2011-10-25 (110 days ago)

** Affects: firefox (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug natty

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Title:
  Regression in html5 video support in FF 10 & 11

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