[Libav-user] RTP Opus demuxer is missing extradata with Opus header

Carl Eugen Hoyos ceffmpeg at gmail.com
Sat Oct 31 14:17:58 EET 2020

Am Do., 29. Okt. 2020 um 22:46 Uhr schrieb Jonathan Baudanza <jon at 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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