[FFmpeg-devel] Call for maintainers: vf_uspp, vf_mcdeint

[Paul B Mahol]

On Sun, Dec 13, 2020 at 3:03 PM Michael Niedermayer <michael at niedermayer.cc>
wrote:

> On Sun, Dec 13, 2020 at 02:02:33PM +0100, Anton Khirnov wrote:
> > Quoting Paul B Mahol (2020-12-13 13:40:15)
> > > Why? Is it so hard to fix them work with latest API?
> >
> > It is not exactly obvious, since coded_frame is gone. I suppose you
> > could instantiate an encoder and a decoder to work around that, but it
> > all seems terribly inefficient. Lavfi seems to have some ME code, so
> > perhaps that could be used for mcdeint. Or if not, maybe someone could
> > get motivated to port something from avisynth or vapoursynth. Similarly
> > for uspp, surely one can do a snow-like blur without requiring a whole
> > encoder.
> >
> > In any case, seems to me like a good opportunity to find out whether
> > anyone cares enough about those filters to keep them alive. I don't
> > think we should keep code that nobody is willing to maintain.
>
> I might do the minimal changes needed to keep these working when i
> find the time and if noone else does. Certainly i would not be sad
> if someone else would do it before me ;)
>
> Also if redesign happens, what looks interresting to me would be to
> be able to export the needed information from encoders.
> Factorizing code from one specific encoder so only it can be used
> is less general but could be done too of course
>
> if OTOH encoders in general could export their internal buffers for filters
> or debuging that seems more interresting.
>
> Are there other issues with these filters which need work besides this
> coded_frame use ?
>
>
I think that adding extra API to workaround this issues in filters is ugly
direction.
IMHO filters should not use lavc code at all.
For example what uspp needs/steals from lavc to post-process frames?
Also what mcdeint uses from snow encoder in lavc to motion interpolate
frames?



> thx
>
> --
> Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
>
> Republics decline into democracies and democracies degenerate into
> despotisms. -- Aristotle
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