[FFmpeg-user] chroma colour

[Paul B Mahol]

On Thu, Sep 24, 2020 at 08:52:44PM +0800, Paul Bourke wrote:
> > Also, I really dunno why people keep using remap filter with its only
> > available neighbour pixel interpolator.
> 
> Yeah, not ideal.
> 
> I don't use it for images, I have my own solution for that with
> supersampling antialising.
> But for movie conversion, what is the alternative? I on occasion
> - Extract frames, apply remapping in my code for each frame, assemble movie.
> - Generate remap filters 2,3 or 4 times larger than I need and scale
> result down.

Nice idea, what upscaling methods you use? Do you use swscale by any chance?
And what filters for upscaling and later downscaling (bilinear/lanczos/spline/...) ?