Hi
Turning attention to option #2, I have looked at rtpproxy (my
preferred default), iptrtpproxy, and mediaproxy modules but
have not found any evidence that the control protocols
Kamailio/SR uses to engage them support any notion of
backward asynchronous feedback in case of RTP timeout.
Rtpproxy has timeout_socket which can be used with MI/RPC interface to
do dlg_bye().
Would this fit your needs?
We did it this way for one of our projects.
Kind Regards.
Min Wang