[FFmpeg-devel] [PATCH] avformat/movenc: add write_clli flag to write clli atom

[Michael Bradshaw]

> On 4/1/2020 4:54 PM, Carl Eugen Hoyos wrote:
> If there already are devices that support it, it should not be optional.

There are, but these boxes aren't technically standardized for mp4/mov
as far as I can tell. I'm reluctant (but not entirely opposed) to
enable something by default that isn't formally specified.

On Wed, Apr 1, 2020 at 2:07 PM James Almer <jamrial at gmail.com> wrote:
> If anything, I'd rather have these boxes (clli and mdcv) written when
> strict_std_compliance <= experimental than adding a new muxer option.

`-strict -2` might have other side effects though. Also I think adding
new muxer options are much more discoverable for users because you can
see how to enable clli/mdcv with `-h full`. The write_clli/write_mdcv
flags are meant to be temporary, anyway.

On Wed, Apr 1, 2020 at 2:48 PM Jan Ekström <jeebjp at gmail.com> wrote:
> If we want to enable possibly-MIAF-specific things in normal MP4, then
> we could enable it by default already.

If MIAF specifies both clli and mdcv and you can confirm we're writing
them correctly then I could be convinced to skip the experimental
phase in FFmpeg and just write them by default. I haven't bought a
copy of MIAF but I will if it'll help us sort this out.