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

[Marco Ballesio]

On Thu, May 27, 2010 at 9:29 AM, Marco Ballesio <gibrovacco at gmail.com> wrote:
> On Fri, May 21, 2010 at 6:21 PM, Miguel Telleria de Esteban
> <miguel at mtelleria.com> wrote:
>>
>> NOTE:  This happens with some other formats as well such has H.264
>>       according to what I was informed in the IRC channel.
>
> These information can usually be carried over a standard RTP stream,
> it is the (in)famous distinction made between in-band and out-band
> so-called "codec-data" in GStreamer that makes the things a little
> messy.
>
> For x264enc you should overcome this by using byte-stream=true but,
> basically, if the encoder does not support the distinction you must
> hack it or rely on a signalling/control protocol to get your
> application working.

thinking again about this.. if an encoder always sends the codec-data
in the caps it should be easy to modify all the payloaders and add
them an option to convert it from outband to inband so to make any
encoder working in absence of a signalling/control protocol. Has
anybody already worked at something like this?

Regards

>
> Regards
>
>>
>> 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
>>
>>
>> --
>>
>>      (O-O)
>> ---oOO-(_)-OOo-----------------------------------------------------
>>  Miguel TELLERIA DE ESTEBAN               http://www.mtelleria.com
>>  Email: miguel at mtelleria.com           Tel GSM:  +34 650 801098
>>                                          Tel Fix:  +34 942 280174
>>
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>