ffmpeg-php

 ffmpeg (http://ffmpeg.org/ )  is a cross-platform solution to record, convert and stream audio and video.

 

The ffmpeg extension for php , ffmpeg-php ( http://ffmpeg-php.sourceforge.net/) lets you convert audio and video files.

 

how to use ffmpeg :

 

http://forums.theplanet.com/index.php?showtopic=64541&mode=threaded