On Thu, Aug 21, 2008 at 09:17:58PM +0200, Josef Wolf wrote: >The more I look at this PES stream the more confused I get: The >stream_id 0xe0 seems to transport PTS and DTS _only_. Everything >else seems to be contained in PES packets with those unknown >stream_id's. Here is what I see: As mentioned in my previous post, the "stream ids" below B9 are ISO 13818-2 "start codes". Let me try to clarify. A PES header starts with 00 00 01 xx where xx is in the range B9-FF. A PES payload is a list of elements. Each element starts with 00 00 01 xx where xx is in the range 00-B8. The pattern 00 00 01 is never found anywhere else in an MPEG-2 video stream. When you analyze a TS, PES headers are "naturally" located since they start at the beginning of a TS payload with TS header containing a "payload start unit indicator". After demuxing PES packets, you get a suite of elements. Each element starts with 00 00 01 xx. When xx is in the range B9-FF, this is the start of a PES packet, following the PES header syntax as specified in ISO 13818-1 and potentially containing PTS and DTS. When xx is in the range 00-B8, this is NOT the start of a PES header, but the start of a video element inside the payload of the current PES packet. The syntax of the following bytes depends on the start code xx and is defined by ISO 13818-2, not -1. Does this help? -Thierry _______________________________________________ linux-dvb mailing list linux-dvb@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
