[FFmpeg-devel] [PATCH] lavf/mov: add support for sidx fragment indexes

[Dale Curtis]

On Fri, Jul 14, 2017 at 5:38 PM, Michael Niedermayer <michael at niedermayer.cc
> wrote:

>
> I dont think CTTS is the only affected atom.
>
>
Thanks for the response. Yes, I think that's likely true. The ctts one is
just likely the most important since it controls timestamp ordering.


> what you describe sounds like an option. but i might be missing something,
> possibly even something significant. I dont feel that confident with
> this code after quickly looking at it.
>

Here are my experiments thus far if you have further thoughts:
https://chromium-review.googlesource.com/c/572730/
https://chromium-review.googlesource.com/c/572585/

Both fixes and the existing code seem to suffer from assuming that the
sample number in the AVIndex and that of the ctts_data are the same; which
seems questionable. The second experiment should be viable with the
addition of memmove() when inserting in the middle of the array. Will look
at it more next week.

- dale