I think we've corrected this in master already. On Sunday, July 31, 2016, Richard Chan <richard@treeboxsolutions.com> wrote:
Hi list,
FreeSWITCH 1.6.9 and the default configurations:
FreeSWITHCH is using rtcp-mux on the B-leg without signalling in SDP (i.e. no rtcp-mux attribute).
If I change rtcp_audio_interval_msec to passthru or say 2000 then there is explicit rtcp-mux in the INVITE SDP.
The UAC I'm using, sends a few packets to RTP+1, FreeSWITCH sends RTCP with source port the same as RTP, and the UAC auto-adjusts after 10 or so packets. This UAC always includes an a=rtcp line even if the RTCP port is RTP+1.
Is this a "bug"? I would expect FreeSWITCH to signal rtcp-mux on the B-leg.
(On the A-leg, FreeSWITCH doesn't use rtcp-mux and includes an explicit rtcp port in SDP).
-- Richard Chan