[gst-devel] Re : Re : Help with RTP

Rémi BUISSON remi.buisson at viotech.net
Fri Aug 8 09:09:00 CEST 2008 


Aurelien Grimaud wrote:
> Darwin is a streaming server. It is fed with RTP Audio/Video streams 
> and is able to dispatch them to rtsp clients.
> So yes, you can stream from dvb source to Darwin, and then use an rtsp 
> client to ask Darwin for the stream.
>
> To interact with Darwin, you have to write your own darwin plugin.
> Have a look at the QTSS documentation 
> http://www.apple.com/quicktime/streamingserver/
>
> A better solution would be to write a gstreamer plugin acting as a 
> RTSP server ...
Do you mean I have to write a plugin which is like this pipeline ?
src -> demuxer -> streamer_transformer -> encoder -> payloader -> rtp

If this is this, that was my original idea but I have some trouble in 
using rtpbin.
I send a file with this :
gst-launch filesrc location=../partage/Videos/superman_originale.avi ! 
decodebin ! x264enc ! rtph264pay ! rtpbin localport=5001 
destinations=192.168.1.2:5000

I receive it with this :
gst-launch udpsrc port=5000 ! rtph264depay ! decodebin ! xvimagesink

And I don't know why I have to use the last pipeline instead of :
gst-launch rtpbin localport=5000 ! rtph264depay ! decodebin ! xvimagesink

to make it work.

Next, I don't know why streams are not compatible because I can't read 
the stream I send with VLC or Totem (which use gstreamer).

Rémi
>
> Aurelien
>
> ----- Message d'origine ----
> De : Rémi BUISSON <remi.buisson at viotech.net>
> À : Discussion of the development of GStreamer 
> <gstreamer-devel at lists.sourceforge.net>
> Envoyé le : Jeudi, 7 Août 2008, 17h14mn 30s
> Objet : Re: [gst-devel] Re : Help with RTP
>
> Thanks.
>
> With this server, can I stream from dvb source for instance ?
>
> In fact, I am in an internship and the program I have to write must
> exchange SIP message for the commands. So my question is: can I interact
> easily with Darwin from my C program ? with a plugin ?
>
> Thanks again !
>
> Rémi
>
> Aurelien Grimaud wrote:
> > 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 
> <mailto:remi.buisson at viotech.net>>
> > À : Daiane Angolini <daiane.angolini at freescale.com 
> <mailto:daiane.angolini at freescale.com>>
> > Cc : Discussion of the development of GStreamer
> > <gstreamer-devel at lists.sourceforge.net 
> <mailto: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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