Server-Side video conversion

In a recent project I found this little program: http://ffmpeg.mplayerhq.hu/ (with versions for Linux and Windows). Its main functionality is video processing for several purposes (conversion, compression, cropping, shrinking, joining, resizing, thumbnailing).

This is being very useful for us when converting user uploaded videos in several formats (mov, avi, mpg, wmv) to .flv format, which can be easily played in a web page using a flash component.

I recommend:
For video conversion: http://ffmpeg.mplayerhq.hu/
For video playback: http://www.jeroenwijering.com/?item=JW_FLV_Media_Player