View source for QA/H264-AAC-MP3 support

{| class="fullwidth-table"
|-
| Feature 
| Status 
| Release Target
| Lead engineer 
| QA Lead 
| QA Status 
|-
| H.264-AAC-MP3 support
| {{StatusHealthy|status=Landed}}
| Firefox 22
| Chris Pearce
| Cornel Ionce
| {{StatusHealthy|status=Shipped}}
|}

== Summary ==
This feature adds support for playing H.264/AAC in MP4 and support for playing MP3 audio files in HTML5 (video) and (audio) elements are switched on by default.

== Reference ==
* Pearce's blog post: [http://blog.pearce.org.nz/2013/02/h264aacmp3-support-now-enabled-by.html H.264/AAC/MP3 support now enabled by default in Firefox Nightlies on Windows 7 and later]
* Tracking bug: [https://bugzilla.mozilla.org/show_bug.cgi?id=799318 799318] - [meta] Support H.264/AAC/MP3 video/audio playback on desktop Firefox

== Test Cases  ==
* The available test cases for this feature can be found [https://docs.google.com/spreadsheet/ccc?key=0Aq_25UfoAoJhdFp5MWVfU0lPbzNDcmh1VWh2UktoaUE#gid=0 here].
* Automated tests can be found in bugs [https://bugzilla.mozilla.org/show_bug.cgi?id=799315 799315] and [https://bugzilla.mozilla.org/show_bug.cgi?id=820208 820208].
* Also, automated tests containing different scenarios are found on [http://areweplayingyet.org/ this] page.

== Important Bugs ==
* [https://bugzilla.mozilla.org/show_bug.cgi?id=799315 799315] - Windows Media Foundation backend for media playback
* [https://bugzilla.mozilla.org/show_bug.cgi?id=832754 832754] - Enable support for H.264/AAC/MP3 video/audio playback in Metro Firefox
* [https://bugzilla.mozilla.org/show_bug.cgi?id=839055 839055] - H.264/AAC support: abort playback of resource if the video or audio stream is unplayable
* [https://bugzilla.mozilla.org/show_bug.cgi?id=837859 837859] - Enable WMF backend
* [https://bugzilla.mozilla.org/show_bug.cgi?id=836927 836927] - Get Windows Media Foundation backend to pass Mochitests on TBPL/Try
* [https://bugzilla.mozilla.org/show_bug.cgi?id=825446 825446] - Firefox crashes while trying to open MP3 stream (media.windows-media-foundation.enabled = true)
* [https://bugzilla.mozilla.org/show_bug.cgi?id=824877 824877] - crash in mozilla::MediaCache::GetBlockOwner
* [https://bugzilla.mozilla.org/show_bug.cgi?id=823646 823646] - Certain H.264 movie are not shown properly with media.windows-media-foundation.enabled = true
* [https://bugzilla.mozilla.org/show_bug.cgi?id=823168 823168] - Huge performance problem in IE testDrive FishBowl if set media.windows-media-foundation.enabled = true
* [https://bugzilla.mozilla.org/show_bug.cgi?id=820208 820208] - Register MP4, MP3, and M4A extensions with appropriate Content-Types for httpd.js
* [https://bugzilla.mozilla.org/show_bug.cgi?id=815748 815748] - Build system changes for Windows Media Foundation HTML5 media backend
* [https://bugzilla.mozilla.org/show_bug.cgi?id=838982 838982] - codecdetect.com doesn't detect MPE4, M4A, MP3, AAC, and WAVE
* [https://bugzilla.mozilla.org/show_bug.cgi?id=832143 832143] - Windows Media Foundation backend should implement skip to next keyframe
* [https://bugzilla.mozilla.org/show_bug.cgi?id=824234 824234] - High CPU usage with h.264 video

== Sign off ==
;Criteria
*All the test cases were executed.
*All the blocker, critical, major bugs have been fixed.