[linux-dvb] dvb-t stream in mpeg-4

Johannes Stezenbach js at linuxtv.org
Sat Jun 3 00:38:18 CEST 2006


On Tue, May 30, 2006, Damien Bally wrote:
> Some dvb-t channels in France are broadcasted in mpeg-4. The problem is 
> that I can't extract the video pid of them, hence can't decode anything, 
> though the last patched version of ffmpeg allows h.264 MBAFF decoding.
> 
> Scan correctly reads the audio pid, but the video pid is read as zero.
> I'm using the last mercurial version of dvb-apps.

You could try this patch:

diff -r b2f67e83cf04 util/scan/scan.c
--- a/util/scan/scan.c	Mon May 22 21:57:27 2006 +0100
+++ b/util/scan/scan.c	Sat Jun 03 00:26:06 2006 +0200
@@ -755,6 +755,7 @@ static void parse_pmt (const unsigned ch
 		switch (buf[0]) {
 		case 0x01:
 		case 0x02:
+		case 0x10:
 			moreverbose("  VIDEO     : PID 0x%04x\n", elementary_pid);
 			if (s->video_pid == 0)
 				s->video_pid = elementary_pid;

I'm a bit reluctant to commit this, though, as mpeg2 decoders
might have problems when fed with H.264 ;-/. A more complete
patch would add a command line parameter to output H.264
video pids.
In case 0x10 is not the correct stream type value, the video
pid should be listed as OTHER if you run "scan -vv". 0x10 is
listed in ISO-13181-1 for "ISO/IEC 14496-2 Visual".
Please report which type is actually used for H.264 in France.


Johannes



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