[FFmpeg-devel] [PATCH 2/2] avformat/hls: Add subtitle support

[Franklin Phillips]

Hi,

I tested this code by converting HLS streams into mp4 files and it
seemed to work fine. However I recently compiled mpv with these changes
and when I play back the Apple example stream given in ticket #2833, it
seems to skip a lot of subtitles. It works fine for the real world
streams I'm using it for but it's probably worth holding off with this
change until that's worked out.

Also I tried to make minimal changes to the existing code path because
there don't seem to be any tests for HLS making it hard to know when
something is broken which I guess is why there is the duplication.
However I think you are right and it should be refactored, I had a
further look at how it could be done and will continue working on it.

If you have any advice for testing the current HLS functionality so I
can be confident that there are no regressions, I would appreciate that.

Thanks