FFmpeg is a very fast video and audio converter. It can also grab from a live audio/video source.
The command line interface is designed to be intuitive, in the sense that ffmpeg tries to figure out all the parameters, when possible.
You have usually to give only the target bitrate you want.
FFmpeg can also convert from any sample rate to any other, and resize video on the fly with a high quality polyphase filter.
Wed Oct 26 2011 - silvan (0.6.2-3mamba) - rename packages to libav*-libav and other changes to cohexist with ffmpeg libraries Thu Aug 04 2011 - silvan (0.6.2-2mamba) - rebuilt with libx264 116 Sun Mar 27 2011 - silvan (0.6.2-1mamba) - update to 0.6.2