[vlc-devel] Re: RTP & MPEG-4 elementary stream

[Johann Ransay]

Le Mardi 15 Mars 2005 14:08, vous avez écrit :
> On Tue, Mar 15, 2005 at 02:01:34PM +0100, Johann Ransay wrote:
> > Le Mardi 15 Mars 2005 11:48, vous avez écrit :
> > > On Tue, Mar 15, 2005 at 10:33:50AM +0100, Johann Ransay wrote:
> > > > Hi,
> > > >
> > > > Can anyone tell me if vlc is capable of playing a video that is
> > > > streamed as a MPEG-4 elementary stream directly encapsulated in RTP ?
> > >
> > > Yes, if you have a proper .sdp file for it.
> >
> > Thanks for your reply. I am not familiar with sdp files, would you have
> > an example please ?
>
> Usually the streaming server would generate one.
>
> It usually looks something like this:
> v=0
> o=- 1079341263814773 1079341263814774 IN IP4 192.168.0.41
> s=/etc/nrk1.sdp
> e=NONE
> c=IN IP4 225.117.97.46/15
> b=RR:0
> t=0 0
> a=mpeg4-iod:
> "data:application/mpeg4-iod;base64,AoCAgy4AT///D/T/A4CAgHkAyUBGZGF0YTphcHBs
>aWNhdGlvbi9
> tcGVnNC1iaWZzLWF1O2Jhc2U2NCx3QkFTZ1RBcUJXMG1FRUg4QUFBQi9BQUFCRUtDS0NuNASAgI
>AVAg0AABgAAADAAAAAwAWAgI
> ADAABgBoCAgBAARAAAAAAAAAAAAAAAAAADA4CAgiQAZUD0ZGF0YTphcHBsaWNhdGlvbi9tcGVnN
>C1vZC1hdTtiYXNlNjQsQVlDQ
> WdSVUJnSUNBT0FLZkE0Q0FnREVBQ2dBRWdJQ0FGRUFWQUQ2QUFBSDBBQUFCOUFBRmdJQ0FBaElR
>Qm9DQWdCQUFSQUFBQUFBQUFB
> QUFBQUFBQUFBREFZQ0FnRk1GSHdPQWdJQk1BQlFBQklDQWdDOGdFUVBRa0FBZWhJQUFIb1NBQll
>DQWdCMEFBQUd3OUFBQUFiVUl
> BQUFCQUFBQUFTQUF4SWlBRE5HQVJJRkdQd2FBZ0lBUUFFUUFBQUFBQUFBQUFBQUFBQUFBQXc9PQ
>SAgIASAQUAAJoAAATQAAAE0A WAgIAABoCAgBAARAAAAAAAAAAAAAAAAAAD"
> a=isma-compliance:1,1.0,1
> m=video 47308 RTP/AVP 96
> b=AS:2000
> a=rtpmap:96 MP4V-ES/90000
> a=fmtp:96 profile-level-id=244;
> config=000001b0f4000001b508000001000000012000c488800cd1804481463f;
> a=mpeg4-esid:20
> a=x-mpeg4-simple-profile-decoder
> m=audio 47310 RTP/AVP 97
> b=AS:128
> a=rtpmap:97 mpeg4-generic/44100
> a=fmtp:97 streamtype=5; profile-level-id=15; mode=AAC-hbr; config=1210;
> SizeLength=13; IndexLength=
> 3; IndexDeltaLength=3; Profile=1;
> a=mpeg4-esid:10
>
>
> Hope this helps.
>
> Sigmund
>
Thanks for your help. I managed to acceed to the stream. But the RTP header is 
marked with a dynamic payload type (payload type = 0x79).
Is that legal for a RTP MPEG-4 ES ? 
VLC does not seem to be able to handle this (no RTP header detected). Am I 
doing something wrong ?

Any help appreciated.

Johann


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