It's in the dynamic range, which means that there is not a defined number for mpeg4. See RFC 3016. ISMA uses a different RFC for audio transmission (or a RFC draft, actually). Bill May mpeg4ip Serge GEDEON wrote: > Dear Experts, > > Does anybody know, what is the MPEG-4 RTP payload type Number ? > > Thanks in Advance, > Serge GEDEON