[Users] codec translation

[Atle Samuelsen]

Hi Again Stefano,

Me and Stefan Sayer made a patch to rtpproxy and to nathelper module in
ser, so it changes the sdp, and do transcodeing. It works, but it has a
few bugs in the nathelper code atleast, and it needs atleast a function
to check codecs etc. 

but, on the other hand.. we have had a few calls over it, and it seems
to work rather Ok when my nathelper patch does'nt crash ser :-)

So, if anyone is willing, they can proberbly get to adopt the code, and
productify it. 

So alittle status on the code: 

The code was written for SER trunc about half a year ago. The nathelper
part is written by me, who does'nt do C very much, so that part is very
flacky. but as a proof of concept it works. 

There is a need of a function as decribed above that can check what
codecs the UA supports.


- Atle

* Stefano Capitanio <s.capitanio at caspur.it> [070215 11:52]:
> Hi,
> 
> we would be very interested! :-)
> I think it's a great idea but...what do you mean with "very simple" ?!
> 
> Stefano
> 
> Atle Samuelsen ha scritto:
> >Hi Guys,
> >
> >Just qurious.. How intrested are you guys in a very simple transcoder,
> >wich is based on rtpproxy ? 
> >- Atle
> >
> >* Andreas Granig <andreas.granig at inode.info> [070215 11:09]:
> >  
> >>Hi,
> >>
> >>rtpproxy and mediaproxy do media-relaying and OpenSER does SIP routing. Both have nothing to do with codecs, which are 
> >>negotiated end-to-end. So yes, OpenSER and rtpproxy/mediaproxy do support G729 in a sense that they allow UACs to 
> >>communicate with G729. If you want to transcode between codecs (e.g. G711 <-> G729), you need - as Daniel already said - a 
> >>transcoder like Asterisk.
> >>
> >>Andreas
> >>
> >>raviprakash sunkara wrote:
> >>    
> >>>Hello Daniel ,
> >>>I'm Also Having the Same doubt on g729 Codec,
> >>>I'm  using RTPproxy with Nathelper ,
> >>>OpenSER and RTP proxy does  media signaling when the Call is Established,
> >>>My main question is
> >>>Is RTP proxy support the G729, with OpenSER,
> >>>With out using the Transcoder ( Asterisk ) How can OpenSER signals the G729 Codec.
> >>>On 2/15/07, *Daniel-Constantin Mierla * <daniel at voice-system.ro <mailto:daniel at voice-system.ro>> wrote:
> >>>   Hello,
> >>>   you need a transcoder in the middle. OpenSER does only signaling, so it
> >>>   is not able to transcode. Asterisk, for example, does.
> >>>   Cheers,
> >>>   Daniel
> >>>   On 02/15/07 10:57, tusker keg wrote:
> >>>    > Howdy
> >>>    >
> >>>    > I have a situation  I hope you guys will help me out with
> >>>    >
> >>>    > I am receiving  call from a VOIP  peer  (SIP Call) and the peer can
> >>>    > only send them as G711.
> >>>    > I need to redirect to call to another voip peer over the wan and due
> >>>    > to bandwidth considerations I need to translate the codec to g729.
> >>>    >
> >>>    > Any ideas on how to do this,
> >>>    >
> >>>    > Sample config file will be help
> >>>    >
> >>>    > Regards
> >>>    >
> >>>    > ./Tusker
> >>>    >
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> >>>Thanks and Regards
> >>>Ravi Prakash Sunkara
> >>>ravi.sunkara at hyperion-tech.com <mailto:ravi.sunkara at hyperion-tech.com>
> >>>M:+91 9985077535
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