We are playing around with opus on iOS and freeswitch.

Dialing out from iOS through FS shows this:  Invalid SDP for opus.  Don't ask.. but it needs a /2

FS seems to fix the invalid opus and the call sounds fantastic.   

The problem is on sending opus TO the iOS device.    FS is sending:  a=rtpmap:102 opus/48000/2. Which is correct and true.

We are reading that this particular implementation of opus from cSipSimple has a know bug on the /2   it just wants opus/48000.

Does anyone know of a fix for either the cSipSimple side or a workaround for FS to just send the opus/48000. ?

Thanks

Tim