[FFmpeg-user] Unable to create movs with multi-channel tracks with discrete channel layout

[Paul B Mahol]

On Saturday, August 6, 2016, Robert Krüger <krueger at lesspain.software>
wrote:

> On Fri, Aug 5, 2016 at 6:28 PM, Paul B Mahol <onemda at gmail.com
> <javascript:;>> wrote:
>
> > On 8/5/16, Robert Krüger <krueger at lesspain.software> wrote:
> > > Hi,
> > >
> > > I would like to create a file that has a "discrete" channel layout,
> e.g.
> > > have an audio track with 8 channels that are not automatically set to
> 7.1
> > > surround. Is that possible with the command line? My attempts so far
> have
> > > been that the files are then created with 7.1 channel layout (checked
> > using
> > > Quicktime 7 which displays the assignment of each channel and compared
> > that
> > > to files created by cameras or other software (e.g. Adobe Media
> Encoder)
> > > that have this property.
> >
> > Do you want to not write chan mov tag? This is trivial to implement.
> >
> >
> I thought so at first but I checked the sample file I have from Adobe Media
> Encoder, which has a discrete layout and that has the chan atom set.
> However, looking at the quicktime spec, I would guess that not writing the
> chan atome should have the same result. For now, I just need it to create
> some sample files, so it would be worth a try.
>

Hmm, if you have Chan atom mov files with no Chan layout set I would like
to see them.