Is there a reason not to use ffmpeg's -vf scale=wxh:flags=lanczos ?

[Boteium]

I think the downscale part can be done by ffmpeg's lancoz downscale filter and remove the need to re-scale it by python.
It's much faster and efficient. The downscale and encoding process can be done together in only one step.
There is really no need to add parallelism in python in the next version when ffmpeg can already do that.

[k4yt3x]

Sounds like a nice idea, I'll try implementing that.

[thekryz]

does this work now? What does the flag have to look like for video2x command line version?
Would love to use this with real-esrgan to downscale after upscaling by a fixed factor.

[k4yt3x]

@thekryz No it wasn't implemented in the new version yet. Implementing this is more complex with the C++ version since we aren't calling FFmpeg commands anymore and it's no longer a simple string. We'll need to create buffer sinks and filtergraphs. It's most likely going to be added in #1196