[gst-devel] Re : Help with RTP

[Aurelien Grimaud]

Hi, I think you need a server here to handle the negotiations (sdp exchange).
Then, you can use RTCP sent by client to detect network congestion.

Darwin streaming server is a rtsp server and may be a good start to handle rtsp.
It also supports easy plugin writting, in which you can alter your stream the way you want, without re-writting a rtsp stack from scratch.

Aurelien



----- Message d'origine ----
De : Rémi BUISSON <remi.buisson at viotech.net>
À : Daiane Angolini <daiane.angolini at freescale.com>
Cc : Discussion of the development of GStreamer <gstreamer-devel at lists.sourceforge.net>
Envoyé le : Jeudi, 7 Août 2008, 8h37mn 59s
Objet : Re: [gst-devel] Help with RTP

Hi and thanks for your reply !

OK I will try today and I will tell you if it works for me.

My goal is to write a streaming server which can transcode, transrate, 
... a stream and using a file for clients may be some kind of a 
do-it-yourself solution.

For instance, the client send a message to the server for starting the 
streaming of a file. Next, imagine the network is overloaded. Then, the 
client will ask to the server to decrease the bitrate of the stream.

The client may be VLC, MPlayer, ...

Have you any idea to do it ?

I think it's possible because the streams are standardized.
Moreover, I tried to read a video streamed by flumotion over HTTP and it 
works perfectly with VLC.

Thanks again.

Daiane Angolini wrote:
> Hello Remi!
>
> If you want to see streaming using VLC you can use a SDP file.
>
> Try this:
>
>
> *v=0*
> *o=- 37 614155991 IN IP4 127.0.0.0*
> *s=QuickTime*
> *t=0 0*
> *a=range:npt=now-*
> *m=audio 5432 RTP/AVP 0*
> *c=IN IP4 10.29.241.6*
> *b=AS:63*
> *m=video 5434 RTP/AVP 96*
> *c=IN IP4 10.29.241.6*
> *a=rtpmap:96 H263-2000/90000*
> *a=fmtp:96  *
> *a=cliprect:0,0,144,176*
> *a=framesize:96 176-144*
>
> In this file you have both audio and video.
> But if you need a simple one, you can try this:
>
> *v=0*
> *m=video 5434 RTP/AVP 96*
> *c=IN IP4 10.29.240.186*
> *a=rtpmap:96 MP4V-ES/90000   *
> *a=fmtp:96 
> config=000001b002000001b59113000001000000012000c488800f50584121443f;profile-level-id=2*
>
> The *config* and *profile-level-id* you can get from the return value 
> of *gst-lauch -v* command. In the caps property.
>
> Ah!
> To use VLC with SDP file use:
>
> vlc -vvv file.sdp
>
> I hope it works
>
>
> Daiane
>
>
>
>
> On Wed, 2008-08-06 at 16:21 +0200, Rémi BUISSON wrote:
>> Hi everyone,
>>
>> I have some troubles streaming video file over the network.
>>
>> First of all, I tired this :
>>
>> server:
>> gst-launch filesrc location=../partage/Videos/superman_originale.avi ! 
>> decodebin ! x264enc ! video/x-h264 ! rtph264pay pt=96 ! udpsink 
>> host=192.168.1.2 port=5000 sync=false
>>
>> client:
>> gst-launch udpsrc port=5000 ! rtph264depay  ! decodebin ! xvimagesink
>>
>> It works but I can't read it with vlc : vlc udp://@:5000 : is it normal ?
>>
>> Now I would like to do the same thing with an RTP pipeline :
>>
>> server:
>> gst-launch filesrc location=../partage/Videos/superman_originale.avi ! 
>> decodebin ! x264enc ! rtph264pay ! rtpbin localport=5001 
>> destinations=127.0.0.1:5000
>>
>> client:
>> gst-launch udpsrc port=5000 ! rtph264depay ! decodebin ! xvimagesink --> 
>> this works
>> gst-launch rtpbin localport=5000 ! rtph264depay ! decodebin ! 
>> xvimagesink --> this doesn't work
>>
>> How can I receive my stream ? with vlc ?
>>
>> Thanks in advance !
>>
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