Re: [Linphone-users] adding G726-40, 32, 24, 16 dynamic PT codecs to oRTP

[Simon Morlat]

Hello,

Your payload definitions are ok. I think your noise problem probably results 
of encoding/decoding problems. Also check that all packets are correctly 
received (no timestamp problems) using the oRTP statistics 
(ortp_global_stats_display()).

You can setup a profile on a per call basis using this:
RtpProfile *prof=rtp_profile_clone(&av_profile);
/* add your dynamic payloads:*/
rtp_profile_set_payload(prof,32,&payload_type_g726_40);
/*...*/
/* set the profile to the session */
rtp_session_set_profile(session,prof);

Simon

> When I try to set up a conversation with the SIPURA ATA using any of the
> above codecs, I get annoying noise.... - which could be due to further
> modifications needed to the oRTP lib or some internal imlementation
> error, that is what I am trying to find out. However, my code works just
> fine with ALL static PT codecs -G711, G729a.G723. Are there any further
> modifications that should be applied to oRTP to support the
> aforementioned codecs?
>
> Additionally, the RTP payload type of theses codecs is determined by
> the call stack and should be decided on a per call basis. Could anybody
> tell me - preferrably using an example - what are the functions I should
> call in order to perform such a task?
>
> Any help would be greatly appreciated.
>
> Regards,
> Dimitris