Deoldify Vapoursynth filter

[Dan64]

VSPipe.exe --progress -c y4m c:\Users\Selur\Desktop\test.vpy NUL
normal (= just deoldify):

Script evaluation done in 11.18 seconds
Output 429 frames in 42.74 seconds (10.04 fps)

stacked (= split, stack, deoldify, split, interleave):

Script evaluation done in 8.62 seconds
Output 430 frames in 22.62 seconds (19.01 fps)

Cu Selur

It is only an apparent speed improvement.

Supposing that you are using a render_factor=24, by stacking the frames you are decreasing by 2 the render_factor.
You can obtain exactly the same speed increase and quality (without stacking the frames) by setting render_factor=12 and dd_render_factor=12

Dan