ffmpeg: FFmpeg (With 3GP support)
ffmpeg: 
ffmpeg: FFmpeg is a complete solution to record, convert and stream audio and
ffmpeg: video. It includes libavcodec, the leading audio/video codec library.
ffmpeg: FFmpeg is developed under Linux, but it can compiled under most
ffmpeg: operating systems, including Windows. 
ffmpeg:     Requirements: lame, xvid, imlib2, a52, libdc1394, libraw1394
ffmpeg:     libtheora, faad2, faac, id3lib, libdts, libgsm, mpeg4ip,x264
ffmpeg: 
ffmpeg:                  http://ffmpeg.sourceforge.net
ffmpeg:                       http://www.slacky.it