I'm not sure if this is the right mailing-list to post this query? If not pls redirect me to mailgroups that discuss mpeg-2 systems. In our multimedia lab, I have been working on developing a s/w transport stream multiplexer. I have it working and a std IRD is able to decode the stream. It is a single program ts generator. However, I'm not clear as to what should be set as the TS bitrate value. Currently, i'm setting ts bitrate = video_bitrate + audio bitrate + psi rate + overhead for PES/TS headers + alpha(for null packets). How can one decide on the # of null pkts that will be required for multiplexing? It could depend on vbv_buffer size used in mpeg-2 encoding. Your suggestions are most appreciated. Thenmozhi -- ---------------------------------------------------------------------------- Thenmozhi Arunan then@xxxxxxxxxxxxxxxxxxxxxxx DV012, Vigyanpura Campus, Multimedia Systems Lab IISc Quarters, (Opp ISRO Headquaters) SuperComputer Educ & Research Centre New BEL Road Indian Institute of Science Bangalore-560094 Bangalore-560012, India. KARNATAKA,India Office Ph: 80-309 2896. Home Ph: 341 1952 ----------------------------------------------------------------------------