mp4v2 seems abandoned upstream.
Patches:
- A00: Add API call for subpicture subtitles
- A01: Fix divide by zero
- A02: Give a meaningfull error when hitting 4GB limit
- P00: Fix compilation with mingw32
* ffmpeg: enable support for faac (disabled by default because faac is
non-free).
* faac: use an external mp4v2 because the internal one doesn't build.
svn path=/nixpkgs/trunk/; revision=27240