the entire sdp is available as a variable (route the call to the info app to see the variables) so if you have inbound-late-negotiation set to true on the sip profile then you can use a regex or a script to set absolute_codec string before you answer. On Thu, Feb 12, 2009 at 8:06 AM, ivdreg ivdreg <ivdreg@gmail.com> wrote:
Hi all,
Can I ask 2 questions about codec negotiation:
1. Is it possible Freeswitch to work negotiate codecs between two phones as it is described below. INVITE from A with some codecs in SDP ---> Freeswitch rewrites codec preference according absolute_codec_string but exclude all codecs not offered by A ----> INVITE to B with rewrited SDP.
example: from A SDP:PCMA,PCMU,SPEEX ----> absolute_codec_string=G722,PCMU,PCMA,GSM ----> to B SDP: PCMU,PCMA
2. Can I get codec list in INVITE with mod_perl for example or via xml_curl without processing SDP variable (switch_r_sdp). It will be useful to be in format that absolute_codec_string variable takes.
Thanks
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