[FFmpeg-devel] [PATCH 3/3] lavf/matroskadec: export chained segment chapter metadata.

[wm4]

On Sat, 28 Feb 2015 11:34:37 +0100
Nicolas George <george at nsup.org> wrote:

> Le nonidi 9 ventôse, an CCXXIII, wm4 a écrit :
> > At the very least, you should check the ordered chapter flag. If it's
> > not set, the segment uid is supposed to be ignored. You need to export
> > the edition IDs.
> 
> The spec does not seem to state so. I will wait to have a sample where that
> makes a difference to see if there is anything to do.

What spec? There's no spec. Just a website with some extremely
incomplete information.

> 
> >		   You need to handle editions at all, and they have
> > weird interactions with ordered chapters.
> > 
> > (Handling of editions complicate the thing somewhat, but if lavf
> > doesn't include it, I'm not interested in all this work, since my
> > player's mkv demuxer handles it just fine.)
> 
> I will wait to have a sample where this is relevant.
> 
> > There should be a fast way to probe a file whether it's a Matroska file
> > with a uid that matches a required segment.
> 
> This has nothing to do with the scope of this patch.
> 
> > Also it would be nice if it wouldn't abuse metadata for this, or if
> > libavformat at least had a mechanism to separate real metadata and file
> > tags.
> 
> There is something there indeed. As a lightweight change, I can think of
> this: use namespace prefixes: lavf.segment_uid (like lavfi.ebur128).

What if a tag uses this.

> 
> Regards,
>