[gst-devel] Example of sending vorbis audio and theora video through RTP without RTSP

[Stefan Kost]

Am 21.05.2010 18:21, schrieb Miguel Telleria de Esteban:
> Dear all,
> 
> Some months ago I started developping an example to send vorbis audio
> and theora video through RTP in a "standalone" form, without RTSP or
> any other session control.
> 
> I finally succeeded (with the valuable help of #gstreamer IRC channel)
> and you can find the implementation here:
> 
> http://www.ctr.unican.es/asignaturas/dec/Doc/ogg_audio_video_rtp_sender_receiver.tar.gz
> 
> I would propose to have it added to the test directory of RTP.

Just add it localy and create a patch. File a bug in bugzilla and add your patch
there.

Thanks
Stefan

> 
> The main difficulty to overcome was that Vorbis and Theora receivers
> need an initial content-depent information which is not available in
> the RTP incoming payload.  Without that information the receivers
> cannot decode the stream.
> 
> NOTE:  This happens with some other formats as well such has H.264
>        according to what I was informed in the IRC channel.
> 
> The information is the "configuration" GstStructure which consists in a
> long base64 blob.  This information is typically sent via a previous
> server protocol such RTSP.
> 
> However I stubbornly decided not to use any RTSP or HTTP server at all.
> 
> The solution I came up with is dumping the information to a file that
> could be copied by other means to the client.  So in order to use my
> demo program you need to:
> 
> 1.  Start the sender in order to obtain the audio_caps and video_caps
>     file.
> 
> 2.  Pass the audio_cpas and video_caps by other means (e.g. SSH).
> 
> 3.  Start the client providing the audio_caps and video_caps files.
> 
> Since all I wanted to do was a proof of concept this solution satisfied
> me for my needs.
> 
> I hope this will help other Gstreamer beginners and of course I am open
> to suggestions on how to make the same task in a more easy way.
> 
> Regards,
> 
> 	Miguel Telleria
>