[gst-devel] Help with RTP

Rémi BUISSON remi.buisson at viotech.net
Thu Aug 7 08:37:59 CEST 2008


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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