[Libav-user] RTSP SDP Parsing Error

[Andy Shaules]

On 2/27/2015 9:09 AM, Mark Kenna wrote:
> On 13 February 2015 at 12:07, Mark Kenna 
> <mark.kenna at sureviewsystems.com 
> <mailto:mark.kenna at sureviewsystems.com>> wrote:
>
>     Hi
>
>     I think there is a problem in the SDP parsing of RTSP.c. I have an
>     SDP which has 2 tracks, one is H264 and the other is MJPEG. It
>     appears that FFMPEG is always opening MJPEG regardless of which
>     codec is specified first in the track list. Here is an example:
>
>     v=0
>     o=- 130683027881870000 130683027881870000 IN IP4 2.0.2.42
>     s=Camera
>     c=IN IP4 0.0.0.0
>     t=0 0
>     a=control:*
>     m=video 1036 RTP/AVP 96 26
>     a=control:?StreamID=0
>     a=rtpmap:96 H264/90000
>     a=fmtp:96 packetization-mode=1; profile-level-id=420029;
>     sprop-parameter-sets=Z0IAKeKQLBLYEnBQEF4eJEVA,aM48gA==
>     a=rtpmap:26 JPEG/90000
>
>     Thanks,
>     Mark.
>
>
> Hi Guys
>
> Did anyone see this issue? I was wondering if anyone has suffered the 
> same problem?
>
> Thanks,
> Mark.
>
>
>
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Hello,


It appears the SDP is wrong. I believe there should be two m entries.

m=video 1036 RTP/AVP 96
a=control:?StreamID=0
a=rtpmap:96 H264/90000
a=fmtp:96 packetization-mode=1; profile-level-id=420029; 
sprop-parameter-sets=Z0IAKeKQLBLYEnBQEF4eJEVA,aM48gA==
m=video 1036 RTP/AVP 26
a=control:?StreamID=0
a=rtpmap:26 JPEG/90000


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