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

[Robert Krüger]

On Fri, Aug 5, 2016 at 6:28 PM, Paul B Mahol <onemda at gmail.com> 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.