I’m going to be starting a video hosting website and would like to be able to convert different video formats to the Flash Video FLV) format for playback in a Flash video player online.

Are there any libraries to do this? I would like to do it in C because of the sheer load put on the server that is converting the videos. I don’t think there is any other option than C/C++ really.

Any ideas on how to do this would help.