[OpenSIPS-Users] codec manipulation feature

[Jeff Pyle]

Great, Andrei.  I look forward to being able to test it.


- Jeff



On 7/22/09 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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>> Users at lists.opensips.org
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>> 
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