Hello,
On 17.12.25 02:08, David Cunningham via sr-users wrote: > Hello, > > We need to replace a=sendrecv with a=sendonly in the 200 OK reply to > an INVITE. In theory it should be something straightforward, like in > the onreply_route using: > > replace_body_all( "a=sendrecv", "a=sendonly" ); > > or: > > subst_body( '/^a=sendrecv/a=sendonly/' ) > > Our first problem is that these both are appending a=sendonly to the > end of the SDP, not replacing values within it. Does anyone know why > this might happen? it could be because of conflicting operations with rtpengine (or rtpproxy). You could try the replacement in the core reply_route() and then use msg_apply_changes. > > Our second problem is that we really only want to do this for video > media, and not touch the audio media. Are there any text tools that > allow you to work with specific media within the SDP? > The sdpops has an sdp iterator that could help: once you match the video stream, look for the sendrecv attrbute and replace the line. Cheers, Daniel -- Daniel-Constantin Mierla (@ asipto.com) twitter.com/miconda -- linkedin.com/in/miconda Kamailio Consultancy, Training and Development Services -- asipto.com Kamailio World Conference, May 7-8, 2026 - Berlin, Germany -- kamailioworld.com
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