[OpenSIPS-Users] codec manipulation feature

[Ovidiu Sas]

Hello Andrei,

Are you using the core sdp parser implementation?

Ovidiu

On Wed, Jul 22, 2009 at 8:59 AM, andrei dragus<andreidragus at yahoo.com> wrote:
>
>
> Hi Jeff,
>
> This is Andrei. I am currently working on this right now. It should be finished in a couple of days if nothing comes up.
>
> Andrei.
>
> --- On Wed, 7/22/09, Jeff Pyle <jpyle at fidelityvoice.com> wrote:
>
>
>> Just curious if you had a chance to see what the status is
>> of this SDP
>> manipulation code.
>>
>>
>> Thanks,
>> Jeff
>>
>>
>>
>> On 6/15/09 6:36 PM, "Bogdan-Andrei Iancu" <bogdan at voice-system.ro>
>> wrote:
>>
>> > Hi Jeff,
>> >
>> > I have some code from last year - let me check it out
>> and see what is
>> > the status.
>> >
>> > Regards,
>> > Bogdan
>> >
>> > Jeff Pyle wrote:
>> >> Hi Bogdan,
>> >>
>> >> It¹s been a little while since we talked about
>> this. I was wondering
>> >> if there was anything in the works to detect
>> and/or manipulate the
>> >> codecs present in an SDP.
>> >>
>> >>
>> >>
>> >> - Jeff
>> >>
>> >>
>> >>
>> >> On 2/1/09 4:08 AM, "Steve Kurzeja" <steve.kurzeja at gmail.com>
>> wrote:
>> >>
>> >>     This idea is quite
>> standard in SBCs, typically called codec
>> >>     profiles, where you permit
>> only certain codecs to be passed
>> >>     through the SBC in an
>> INVITE and all the rest are stripped out.
>> >>
>> >>     We use it to get around
>> interop issues with certain codecs. E.g.
>> >>     we have some end
>> devices/customers that have issues using g729a so
>> >>     we choose to remove this
>> codec for these specific endpoints.
>> >>
>> >>     The poor man's method to
>> implementing this is just doing header
>> >>     manipulations in the SDP
>> but it would be nice to be standardized.
>> >>
>> >>     Regards,
>> >>     Steve
>> >>
>> >>
>> >>     On Fri, Jan 30, 2009 at
>> 2:20 AM, Jeff Pyle
>> >>     <jpyle at fidelityvoice.com>
>> wrote:
>> >>
>> >>         Hi Bogdan,
>> >>
>> >>         I'm looking
>> for the ability to selectively remove codec
>> >>
>>    advertisements from
>> >>         the SDP. For
>> example, if my customer sends a call to me for PSTN
>> >>         termination
>> he may advertise G711 and G729, with G711
>> >>         preferred.
>> By looking
>> >>         at the
>> number of existing dialogs I may know that he's running
>> >>         low on
>> >>         bandwidth,
>> so I would like to suppress the G711 advertisement
>> >>         ultimately
>> >>         causing a
>> 200 OK from the carrier with G729.
>> >>
>> >>         Generically,
>> in this application we're looking only to
>> >>         suppress
>> G711 at
>> >>         certain
>> times.
>> >>
>> >>         I understand
>> normally codec selection is done completely by
>> >>         the gateway
>> >>         device.
>> However, my gateway devices aren't smart enough to
>> >>         take
>> bandwidth
>> >>         utilization
>> into consideration when choosing which codecs to
>> >>         advertise.
>> I'm
>> >>         hoping my
>> proxy might be. :)
>> >>
>> >>         Does that
>> make sense?
>> >>
>> >>
>> >>
>> >>         - Jeff
>> >>
>> >>
>> >>
>> >>         On 1/29/09
>> 5:04 AM, "Bogdan-Andrei Iancu"
>> >>         <bogdan at voice-system.ro>
>> wrote:
>> >>
>> >>> Hi Jeff,
>> >>>
>> >>> right now there is only available some
>> functionality to check
>> >>         the codecs
>> >>> (to see what codecs are advertised in the
>> SDP)... What
>> >>         exactly are
>> you
>> >>> looking for (like codec ops) ?
>> >>>
>> >>> Regards,
>> >>> Bogdan
>> >>>
>> >>> Jeff Pyle wrote:
>> >>>> Bogdan,
>> >>>>
>> >>>> Some months back you mentioned an upcoming
>> feature that
>> >>         would allow
>> >>>> Opensips to manipulate the codecs present
>> in the SDP. Just
>> >>         wondering
>> >>>> if there is anything available to test
>> yet. This feature, in
>> >>>> combination with dialog contexts, will be
>> of great use to us
>> >>         to allow
>> >>>> us to take a guess at the bandwidth
>> consumption for a particular
>> >>>> customer and force the use of a compressed
>> codec if necessary.
>> >>>>
>> >>>>
>> >>>> Thanks,
>> >>>> Jeff
>> >>>
>>
>>
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