FFmpeg is a complete, cross-platform solution to record, convert and stream audio and video. It includes libavcodec - the leading audio/video codec library. See the documentation for a complete feature list and the Changelog for recent changes.

Memo : http://sebsauvage.net/wiki/doku.php?id=ffmpeg
TUTO : http://www.mti.epita.fr/blogs/2012/12/20/tutoriel-ffmpeg/
Korben : http://korben.info/ffmpeg-pour-les-nuls.html
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