WinFF Is A Great Audio / Video Converter With Presets For iPod-iTunes, Google Android, Blackberry, Etc.

Winff is a GUI fronted for the very well-known FFmpeg, which works on Windows and Linux (unfortunately it doesn't work on Mac OS X).

WinFF 1.2.0 was released a few days ago and it brings 2 new very interesting features: preview and cropping for videos.