Am Do., 29. Okt. 2020 um 22:46 Uhr schrieb Jonathan Baudanza <j...@jonb.org>:
>
> I am trying to write the contents of an RTP-OPUS stream to an OGG-OPUS file. 
> The purpose is to send a WebRTC session to Google's Speech-to-text API, which 
> accepts OGG-OPUS as input.
>
> The opus muxer requires that an opus header be present in extradata. It seems 
> that the demuxer from my RTP stream doesn't include this.
>
> If I construct the opus header myself and insert it into extradata, 
> everything works great. This seems like a hack though. Is this something that 
> the RTP demuxer should be doing?

At least channel count and sample rate are supposed to be read
from the SDP file.

Carl Eugen
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