This small program is designed to demux a MPEG 2 file (also called Program Stream).Such movie file it s composed from various packs (video,audio,data,etc.). What this program does is to list every packet in a MPEG2 file along with some info about each pack.It might be interesting to know exactly how much audio or video your movie really contains.-This small program is designed to demux a MP EG 2 file (also called Program Stream). Such mov ie file it's composed from various packs (video, audio, data, etc.) . What this program does is to list every pa cket in a MPEG2 file along with some info about ea ch pack.It might be interesting to know exactly how much your audio or video movie really contai ns.