[FFmpeg-devel] [PATCH 1/2] avformat/mxf: support MCA audio information

[Tomas Härdin]

tis 2021-12-21 klockan 21:24 +0100 skrev Marton Balint:
> 
> 
> On Tue, 21 Dec 2021, Tomas Härdin wrote:
> 
> > tis 2021-12-21 klockan 11:44 +0100 skrev Marc-Antoine ARNAUD:
> > > Le ven. 17 déc. 2021 à 19:12, Marton Balint <cus at passwd.hu> a
> > > écrit :
> > > 
> > > > 
> > > > 
> > > > On Fri, 17 Dec 2021, Marc-Antoine ARNAUD wrote:
> > > > 
> > > > > Hi all,
> > > > > 
> > > > > Can I have an update on this patch submission ?
> > > > > Is something required to be done before it can be merged ?
> > > > 
> > > > New channel layout API is on its way, which makes in-demuxer
> > > > channel
> > > > reordering uneeded. Therefore the reordering option should not
> > > > be
> > > > added
> > > > as it is in this patch. I can rework the patch after the
> > > > channel
> > > > layout
> > > > API is in. (should happen in a couple of weeks at most).
> > > > 
> > > > Regards,
> > > > Marton
> > > > 
> > > 
> > > So it will happen only after the release 5 of FFMpeg right ?
> 
> Not sure. There were people who wanted the merge the channel layout
> api 
> before the release.
> 
> > > 
> > > Is it possible to merge it, and we can rework it after the new
> > > API is
> > > released ?
> > > Patches are related to IMF (new format) patches, and if FFmpeg
> > > can
> > > accept
> > > IMF without MCA support it will generate a lot of errors in audio
> > > mapping.
> > > So even if it's not performant for now, is it possible to imagine
> > > to
> > > merge
> > > patches and rework after ?
> > 
> > I suspect this might create problems for the people writing the
> > reordering API
> 
> It is not matter of performance, we should not introduce a hack such
> as 
> reordering PCM channels in a demuxer if there is a better solution on
> the 
> horizon.
> 
> If this is urgent, we could merge it without reordering support.

I think we can trust our users to maintain their own forks if they need
special hacks

/Tomas