[FFmpeg-devel] [PATCH v3 1/1] avfilter/buffersink: Add video frame allocation callback

[Paul B Mahol]

On Sun, Jul 23, 2023 at 9:26 PM Nicolas George <george at nsup.org> wrote:

> James Almer (12023-07-23):
> > What about when FF_FILTER_FLAG_HWFRAME_AWARE filters are present in the
> > graph? hw_frames_ctx from AVFilterLink can't be accessed from outside
> lavfi.
> > Is vf_hwdownload meant to be added to the graph before buffersink?
>
> I do not know how hardware acceleration works at all. (The tidbits of
> discussion I catch left me the impression all of it is very badly
> designed, but I have low confidence in that impression.) If this API
> only works with filters that output software frames, it is already very
> useful.
>

Patch is only marginally useful:

- missing audio support
- missing full internal buffers allocation replacement support
- missing/untested hardware acceleration support


> Regards,
>
> --
>   Nicolas George
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