I am making a video upload script with PHP that converts the video into FLV to play on the site with a flash player. I am trying to decide if I should use mplayer or ffmpeg. I want one that has enough codecs to cover at least all the major ones so that users won't have problems uploading videos. Also if mplayer is better to use I am not quite sure how to setup the command.
I am interested in this one too. Right now using ffmpeg but the video output quality is not good and size is big.