I'd like to play an mpeg-4 elementary stream. there's no header around it so the mplayer doesn't realize the right codec (no surprise). By putting the file into an mpeg-4 container (.mp4) everything works fine. is it somehow possible to play the raw conformance stream (via a fifo)? myFiles: mpeg4conformance.txt - this mpeg4conformance.cmp - the raw elementary stream, without header mpeg4conformance.txt - es in mp4 container, with header, working thanks, klaus@itec.uni-klu.ac.at