[Freeswitch-users] absolute_codec_string and bypass_media

[Kristian Kielhofner]

Exactly.  What about these cases where you're removing a codec from
the offer and/or changing the order?

FreeSWITCH currently allows you to do this by mangling the SDP and so
do others (OpenSIPS txtops, etc).

On Tue, Jul 27, 2010 at 11:37 AM, Sergey Okhapkin
<sos at sokhapkin.dyndns.org> wrote:
> In my application I need 2 kinds of SDP manipulation in bypass media mode and
> late negotiation turned on:
>
> 1) Do not send out no-sense for PSTN codecs on leg B like wideband codecs,
> ilbc or speex. I need to filter out all codecs except for PCMU, PCMA,G729 and
> GSM.
>
> 2) Change codec order on B-leg, some PSTN carriers (like icall) behave wildly
> if G729 is first codec, I need to change A-leg codec order "18 0" to "0 18".
>
> On Tuesday 27 July 2010, Anthony Minessale wrote:
>> You really never should be messing with the sdp because you can cause a
>> violation in the SOA policy.
>> The negotiation is between the 2 endpoints so if you modify A's sdp it
>>  could confuse it when you reply back with B's sdp which was created under
>>  false pretenses.
>>

-- 
Kristian Kielhofner
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