[Live-devel] H.264 frame via Mplayer's RTSP (live 555 library)

[Satheesh Ram]

Hi,
The  sprop-parameter-sets in SDP can be used to transmit SPS and PPS. if 
the streaming server used sprop-parameter-sets to indicate the SPS and 
PPS, you will not get them in raw dumped stream.
pls refer to http://www.rfc-archive.org/getrfc.php?rfc=3984

Ratin wrote:
> Hi I am trying to dump a h.264 1080i source stream into raw bitstream 
> file, the stream plays fine on mplayer over rtsp. However when I dump 
> the video stream using -dumpvideo and -umpfile mplayer can't play it 
> back. It looks like the bitstream only has one IDR frame (00 00 00 01 
> 65) and no other NALU like sps/pps and mplayer complains about not 
> finding them. But the rtsp stream version works flawlessly. If I look 
> at the wireshark trace, I see that the stream starts with the rtp payload
>  
> 0x7c 85 88 84 ..very first rtp packet
> 0x7c05d34f ... 2nd rtp packet
>  
> :::::
>  
> :::::
>  
> 0x7c457c1ff         being the last one in the gop (marker bit set)
>  
>  
> i think thats an idr frame..
>  
>  
>  
> the subsequent frames rtp payloads are:
>  
> 5c819a20    first RTP paket of 2nd frame (possibly a p frame? ) 
> 5c01ff37      2nd RTP packet
> :
> 534172c4  last RTP of 2nd frame and mrkar set
>  
>
> roughly about 35 frames of type 5c81 .. 5c01 .. 5c41 's
>
> then it repeats with 
>
> 7c858884 etc
>
>
>  
> etc etc
>  
>  
> Anybody have any clue how to interprete these nalu headers in terms of
> anex b style bitstream?
>
> why would mplayer only convert the first IDR and not the other ones ? 
> Is there anything missing from the subsequent IDR frames? Where are 
> the SPS and PPS?
>  
> thnx
>  
>
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-- 
Satheesh Ram


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