Tracker for packages failing to build or work with >=media-video/ffmpeg-2.4. http://git.videolan.org/?p=ffmpeg.git;a=blob;f=RELEASE_NOTES;hb=release/2.4 http://git.videolan.org/?p=ffmpeg.git;a=blob;f=doc/APIchanges;hb=release/2.4
all should be covered now