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

[Sigmund Augdal]

On Tue, Mar 15, 2005 at 03:48:52PM +0100, Johann Ransay wrote:
> 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 ?

Yes, when dealing with dynamic payload types the sdp needs to have a proper
a=rtpmap line in the sdp.

Sigmund

---
Sigmund Augdal
Edgar B. Schieldropsv 29-14
N-7033 Trondheim
Norway
tlf: 91809129

-- 
This is the vlc-devel mailing-list, see http://www.videolan.org/vlc/
To unsubscribe, please read http://developers.videolan.org/lists.html