[Libav-user] RTSP SDP Parsing Error

[Mark Kenna]

On 27 February 2015 at 19:38, Andy Shaules <bowljoman at gmail.com> wrote:

>  On 2/27/2015 9:09 AM, Mark Kenna wrote:
>
>  On 13 February 2015 at 12:07, Mark Kenna <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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>
Hi Andy

According to the SDP specification you are allowed to have multiple media
values in the same m line. If you have information to the contrary then
please let me know.

Appreciate the information!

Mark.
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