[Bug 248847] www/firefox no audio playback after update to 80.0_2,1

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248847

--- Comment #13 from Jan Beich <jbeich at FreeBSD.org> ---
(In reply to VVD from comment #10)
> Where is "media.cubeb.backend" in this description?

A few lines above. New users and binary package users don't need to touch
media.cubeb.backend. I did confirm inside pristine jail on 11.3 i386 and 12.1
amd64.

Where it gets hairy is when a user has installed jackit or sndio or
misconfigured pulseaudio by blindly following advices found on the internet
(aimed for Linux). Each of those have their own maintainers while firefox
provides a way to explicitly select a specific backend. However, pkg-message
refers to about:support for troubleshooting.

> And nothing about set media.cubeb.backend=oss.

OSS was added in ports r370932 then removed in ports r485458 and re-added in
ports r545611. Only the recent implementation supports device enumeration
necessary for microphone selection in WebRTC.

(In reply to VVD from comment #12)
> Can you add words about WebRTC, plz?

See "Microphone selection...". WebRTC doesn't require microphone and camera,
see data channels.

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