Bug#1029663: Fwd: Bug#993806: kodi: No audio on DVD playback, AC3 Support
Summarizing the AAC to AC3 issue with stable Debian.
https://bugzilla.rpmfusion.org/show_bug.cgi?id=6000
tells that inital ffmpeg 4.4 support has to be added but is not enough.
Ine has to also add https://github.com/xbmc/xbmc/pull/20678 ; ffmpeg:
Set audio channel count on AVFrame #20678, kodi patch for to fix AAC to
AC3 transcoding.
I admit I am not sure I can reproduce with my setup (pipewire and only
stereo devices) to try if it is enough (or even not already fixed in
bullseye-backports).
I tried but am unable to find how to "disabling AAC passthrough for
Pulseaudio via pavucontrol" and "enabling the AC3 transcoding setting
in Kodi". Could you be more specific about the steps?
Cheers,
Alban
On Mon, 26 Sep 2022 22:48:36 +0200 Markus Koller <markus-koller@gmx.ch>
wrote:
> Hey Alban,
>
> I ended up switching to the Flatpak version of Kodi to avoid these
issues,
> so unfortunately I can't easily test (especially since I'm also using
sid,
> which I see is on an alpha version of Kodi 20 now).
>
> > How did you do AC3 to AAC transcoding (playing DVD with kodi 19?).
>
> It was the other way around, transcoding from AAC to AC3.
> You can achieve that by disabling AAC passthrough for Pulseaudio via
> pavucontrol, and enabling the AC3 transcoding setting in Kodi.
>
> IIRC it only affected source files with AAC tracks, normal AC3
passthrough
> still worked.
>
> > Mind that upstream kodi ships ffmpeg 4.3.2 so maybe ffmpeg version
> > above that one has a regression (since fixed in ffmpeg 5.1 because
> > debian kodi 20 with debian ffmpeg 5.1 has DVD audio working).
> > So maybe it was this debian ffmpeg 4.3.2 that you reverted to back
> > then, hard to tell.
>
> I checked my dpkg logs but they don't go back far enough :(
> FWIW the Flatpak version of Kodi 19.4-Matrix seems to ship with
ffmpeg
> 4.3.4.
>
> > (maybe pipewire supports passwthrough nowadays, hard to tell)
>
> It actually does! But I found it to be buggy (especially with E-AC3
and
> DTS), so I'm staying on Pulseaudio for now.
>
> Greetings,
> Markus
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