[SIP Beyond VoIP] Opus at lower sample rate
jh at tutpro.com
Wed Aug 27 16:34:42 CEST 2014
Saúl Ibarra Corretgé writes:
> Opus is always advertised at 48KHz but it self adjusts. IIRC you
> always need to specify it at 48KHz.
That is correct, but the problem is that number of channels=2 is
missing. According to
The media subtype ("opus") goes in SDP "a=rtpmap" as the encoding
name. The RTP clock rate in "a=rtpmap" MUST be 48000 and the
number of channels MUST be 2.
when it should generate
Now when /2 is missing, blink is not able to negotiate opus with webrtc
clients such as google chrome browser.
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