[FFmpeg-devel] [PATCH 08/24] fftools/ffmpeg_filter: remove an unnecessary sub2video_push_ref() call

[Anton Khirnov]

Quoting Nicolas George (2023-11-04 15:19:00)
> Anton Khirnov (12023-11-04):
> > It only seems to produce duplicate frames.
> 
> Yes it does, that is the point of it. Without the duplicated frame, a
> filter with synchronized inputs (like overlay) will accumulate video
> frames while waiting for the next sub2video frame.

The problem with that code (and the reason this patch exists), is that
it depends on the order in which the frames arrive on filtergraph
inputs, which is not meaningful (and becomes non-deterministic with
threading).

-- 
Anton Khirnov