[FFmpeg-user] Extracting opus frames from webm/mkv

[Carl Eugen Hoyos]

> Am 19.08.2019 um 11:04 schrieb Dziku <synmotopompy at gmail.com>:
> 
> 
> 1. I've looked into image2 but I don't really see how it could be used to
> extract audio, as none of the options in the documentation of image2
> mention anything about audio. Are you sure you meant image2 and not some
> other muxer/demuxer?

I am sure.

> 2. What's the overhead of converting audio only .webms with opus audio to
> .ogg with opus?

I don’t know (and I don’t know how to enumerate) but it should be trivial for you to test.

> Is ffmpeg smart and simply copies opus packets from one
> container format to the other or does it decode every opus packet and
> reencode it when encapsulating it in ogg?

That’s the user‘s (your) choice.

Please find out what top-posting means and avoid it here.

Carl Eugen