Yup, it's pretty easy to build modified (shortened/reordered) absolute_codec_string variable from ep_codec_string, rather than mess with switch_r_sdp variable. On Tuesday 27 July 2010, Kristian Kielhofner wrote:
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@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.