I want to provide an automatic video-converter for my CMS-customers. They should be able to upload their \"untouched\" video-files (MP4, VMV, AVI, ...) and my server compres
Have a look at http://www.ffmpeg.org/ it's pretty much the go-to library for this sort of thing.
I found a PHP driver for it here that looks interesting but I've not tried it. Still, it's easy enough to run the shell commands directly from PHP if needed.