[SIP Beyond VoIP] opus codec negotiation

James Cloos cloos at jhcloos.com
Thu Jun 12 14:23:03 CEST 2014

>>>>> "JH" == Juha Heinanen <jh at tutpro.com> writes:

JH> see below.  both baresip and google/firefox webrtc use this kind of
JH> rtpmap for opus:

JH> a=rtpmap:109 opus/48000/2.

And blink used:

    a=rtpmap:113 opus/48000.
    a=fmtp:113 useinbandfec=1.

The main difference is stereo vs mono.

If you can convice blink to do stereo or the others to do mono they
should inter-negotiate.

James Cloos <cloos at jhcloos.com>         OpenPGP: 0x997A9F17ED7DAEA6

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