[linux-dvb] UDP encapsulated MPEG{2,4} TS into dvbsnoop?

Alexander E. Patrakov patrakov at ums.usu.ru
Fri Oct 12 10:43:01 CEST 2007


Sigmund Augdal wrote:
> payload type 96 and 97 is in the "dynamic payload type" range according to 
> current rfcs.
>   

OK.

>> The question is, still, how to play this.
>>     
> To play it you will need a SDP that describes what the ESes is. My guess is 
> that is is in fact some kind of VOD service and not actually convensional TV.
>   

The names in the "scan" output do correspond to well-known TV stations.

I have tried to extract the RTP payload from the dump using a simple C 
program. The result is that the payload of each packet starts with the 
same bytes (another header?). I tried to guess the length of this header 
and remove it (tried all even lengths between 0 and 20 bytes), and then 
decode the result as raw mp2, mp3, aac, mpeg4, h261, h264 and h264 data 
with ffmpeg. No luck yet, although the h261 codec announces the frame 
size (apparently for cellphones) and refuses to decode further.

What to do next?

-- 
Alexander E. Patrakov



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