[FFmpeg-devel] lavfi: Add fps filter.

[Nicolas George]

Le septidi 17 floréal, an CCXX, Stefano Sabatini a écrit :
> This filter has the usual caching problems due to the poll API, you
> need to request the next frame(s) to say if there are available frames
> (see select/decimate filter patch), then I'm a bit lost on the status
> of the patchset by Nicolas which was overhauling the way lavfi deals
> with such caching issues.

Right now, avfilter_poll_frame is used only in the functions implementing
poll_frame for various filters. And in the two examples, that need to be
updated.

I still need to write some documentation on what is expected from filters.

Also, the scheduling in ffmpeg.c needs to be adjusted to be able to handle
graphs where the timestamps get widely changed, but that is only marginally
related.

Then there are all the filters that do not work as 1-to-1 that need to be
looked into to check if they are doing things right.

I sent a patch on April the 27th that tries to address vf_overlay (IMHO the
hardest), it still needs review.

Regards,

-- 
  Nicolas George
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