[FFmpeg-devel] [PATCH 1/5] avutil/channel_layout: add 22.2 layout

[Jan Ekström]

On Sat, Aug 1, 2020 at 2:51 PM Carl Eugen Hoyos <ceffmpeg at gmail.com> wrote:
>
> Am Di., 16. Juni 2020 um 23:11 Uhr schrieb Jan Ekström <jeebjp at gmail.com>:
> >
> > Requires some extraneous top side and bottom front channels to be
> > defined.
> >
> > According to STD-B59v2, the defined channel layout is:
> > - FL
> > - FR
> > - FC
> > - LFE1
> > - BL
> > - BR
>
> > - FLc
> > - FRc
> > - BC
> > - LFE2
> > - SiL
> > - SiR
>
> No way to change the order to make it compatible with 7.1?
>

I don't think that's realistic since then if we would like our actual
22.2 output to be compatible with the standard-defined channel order
we would have to have a forced conversion at an end user facing end
point, while having another one for the programmatic end points.

Additionally, the spec only mentions stereo/5.1 for direct mapping, so
I've kept to 5.1 since we have the capability for that one.

The specification is available in English @
http://www.arib.or.jp/english/html/overview/doc/6-STD-B59v2_0-E1.pdf .

Best regards,
Jan