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

[Pierre-Anthony Lemieux]

On Sun, Nov 28, 2021 at 4:56 PM Marton Balint <cus at passwd.hu> wrote:
>
>
>
> On Thu, 25 Nov 2021, Marc-Antoine Arnaud wrote:
>
> > ---
> > doc/demuxers.texi     |  10 ++
> > libavformat/mxf.h     |   1 +
> > libavformat/mxfdec.c  | 293 +++++++++++++++++++++++++++++++++++++++++-
> > libavformat/version.h |   2 +-
> > 4 files changed, 299 insertions(+), 7 deletions(-)
>
> I went through this, and the MCA label spec (or rather the draft which is
> publicly available), and found several issues with your approach.
>
> At this point, after so many iterations, I believe it is better if I just
> post my follow-up patches which describe in detail what needed fixing.
>
> Please, check and test the patch series, because I don't have any real
> world files to tests, except the ones created by the BMX tools for
> regression tests.

A sample file is available at:

http://ffmpeg-imf-samples-public.s3.us-west-1.amazonaws.com/callout_51_l_r_c_lfe_ls_rs.mxf

Attached is the XML dump of the header metadata of that sample file,
obtained using the online tool at:

https://registry.smpte-ra.org/apps/regxmldump/view/draft/

>
> Also please provide some MXF samples with MCA if you can, so features like
> routing can be more throroughly tested.
>
> Thanks,
> Marton
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