Free video conversion software that supports widescreen format [closed]

Handbrake handles this well on both OSX and Windows. Also you can do it with ffMpeg directly as well.

"This really depends on your skill and if you want to use command line or not. ffmpeg is the swiss army knife of tools for video conversion and most tools simply are a wrapper around it.

I wrote an open source UI for ffmepg to convert windows media centre files to the iphone is up on codeplex here there is a binary download, but the source would need tweaking to do what you want. But you can't argue with the price."