Looks like you're using both rtpengine and some other SDP-modifying module together, such as nathelper or rtpproxy, without calling msg_apply_changes() in between.

Cheers

On 25/06/2020 16.46, Andrew Chen wrote:
Hi forum,

I'm starting my rtpengine project and I'm facing a strange problem with rtpengine.  I am seeing this in the SDP part of the INVITE:

a=rtcp:52021

a=rtcp-mux

2001:470:7:3A7:0:0:0:2

a=direction:active

a=oldmediaip:54.153.25.234


As you can see there is a random insert of the local kamailio IP in there and I'm have tried the following to remove it but failed to succeed:

- Remove in the offer the combination of ICE and replace-session-connection flags
- Switched between rtpengine_offer and rtpengine_manage
- Restarted ngcp-rtpengine-daemon process
- Used sdpops function sdp_remove_line_by_preifx()

Currently running Kamailio 5.1.2.

I am running out of ideas.

Any suggestions would be greatly appreciated.

--
Andy Chen
Sr. Telephony Lead Engineer



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