Can't find a filter or an effect to "reduce blue"

[Selur]

Sadly, atm. there is no port of RGBAdjust for Vapoursynth, so adding something similar isn't really possible.
Vapoursynth authors write: "RGBAdjust std.Lut Do the adjustment yourself with a lut", see: https://github.com/amichaelt/vapoursynth...thcomp.rst
_Al_ posted a rough translation over at VideoHelp which could be used in a custom section.

Cu Selur

Ps.: did a quick test, extracting the attached zip into the vsscripts folder an using:

# requires colorformat RGB24
import rgbAdjust
clip = rgbAdjust.RGBAdjust(rgb=clip, r=1.0, g=1.0, b=1.0, a=1.0, rb=1.0, gb=1.0, bb=0.0, ab=0.0, rg=1.0, gg=1.0, bg=1.0, ag=1.0)

worked fine here. script: https://pastebin.com/MeVBYdqb
Note, that some other script need to be imported so that Hybrid automatically expands the sys.path, otherwise one would need to expand sys.path in the custom section too.