While FFmpeg has been absent from recent releases of Ubuntu Linux due to the switch over to Libav, with Ubuntu 15.04 it will return.FFmpeg is back to being packaged inside Ubuntu 15.04 and version 2.4.3 is found within the Ubuntu Vivid universe archive as of yesterday. Libav forked from FFmpeg back in 2011 . Libav was favored by the Debian multimedia team but there's been work for bringing FFmpeg back to Debian . FFmpeg/Libav are widely used audio/video codec libraries.The FFmpeg details inside Ubuntu can be found via Launchpad