[FFmpeg-devel] QuickTime Edit List Support

Clément Bœsch u at pkh.me
Tue Sep 8 16:31:06 CEST 2015

On Tue, Sep 08, 2015 at 04:29:48PM +0200, Clément Bœsch wrote:
> On Tue, Sep 08, 2015 at 03:00:25PM +0100, Derek Buitenhuis wrote:
> > On 9/8/2015 11:52 AM, Alex M wrote:
> > > Could somebody please confirm that this issue is still considered
> > > outstanding and that a  working patch has not been submitted? In which case
> > > I’ll start work on this asap.
> > 
> > Working this cleanly into the API is no small feat. Clément was working
> > on this recently, and had even done some patches. I don't know what happened
> > to them (they're somewhere in the mailing list archives). There was a lot
> > of discussion on them.
> > 
> Yes, here is the last one IIRC:
> https://ffmpeg.org/pipermail/ffmpeg-devel/2015-January/167317.html
> > Hopefully Clément will respond to this thread to clarify.
> > 
> .o/
> The state:
> - I don't need it myself anymore (not using the Apple frameworks to avoid
>   generating such file was an easier and more reliable solution with
>   regards to everything in the world not supporting this feature)
> - the uncertainty about FATE changes (see thread) still hold
> - Lacking more test samples
> - There might be some pts/dts adjustment in lavfi that might still
>   conflict with this edit list support (see previous point for
>   confirmation)
> - Still not exactly a satisfying solution (typically, the export of the
>   timeline is not generic, it's a dump of the atom)
> I can rebase my work and let you play with it if you are interested.

Note: if you think you can design a generic data structure for the
timeline, it might be interesting: this might be useful for matroska as
well for example. Not knowing the latter, I didn't take the risk of doing
so and only exported the mov atom.

Clément B.
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