Deoldify Vapoursynth filter

[Selur]

Ah okay.
Something like:

deviation= 0.05
steps: int = 1
tht =  10
  
max_steps = max(min(steps, 5), 1)
  
clip_limited = vs_clip_chroma_stabilizer(clip, deviation=deviation)
for i in range(1, max_steps):
    clip_limited=vs_clip_chroma_stabilizer(clip_limited, deviation=deviation)

# calculate motion mask
org = clip
clipMask = clip
clipMask = clipMask.resize.Bicubic(format=vs.GRAY8, matrix_s="470bg", range_s="limited")
clipMask = vs.core.motionmask.MotionMask(clip=clipMask, th1=tht, th2=tht, tht=tht) # pixels with abs(diff) < tht will be black (static parts)
clipMask = vs.core.std.InvertMask(clip=clipMask) # invert so that static parts are white (weight=1)
# merge in YUV color space      
clipMask = clipMask.resize.Bicubic(format=vs.YUV444PS, matrix_s="470bg", range_s="limited")
clip_limited = clip_limited.resize.Bicubic(format=vs.YUV444PS, matrix_s="470bg", range_s="limited")
clip = clip.resize.Bicubic(format=vs.YUV444PS, matrix_s="470bg", range_s="limited")
clip = vs.core.std.MaskedMerge(clipa=clip, clipb=clip_limited, mask=clipMask) # MotionMask
# restore RBG24 color space
clip = clip.resize.Bicubic(format=vs.RGB24, matrix_in_s="709", range_s="limited", dither_type="error_diffusion")
clipMask = clipMask.resize.Bicubic(format=vs.RGB24, matrix_in_s="709", range_s="limited", dither_type="error_diffusion")
org = org.resize.Bicubic(format=vs.RGB24, matrix_in_s="709", range_s="limited", dither_type="error_diffusion")

clip = core.std.StackVertical([
core.std.StackHorizontal([org.text.Text("Original"), clipMask.text.Text("Mask")]),
core.std.StackHorizontal([clip.text.Text("Filtered"), clip.text.Text("Filtered")])
])

might help to better see whats happening.

And I confirm you that the mask is always "white".
I'm planing to write my own motion-mask filter...

Whats wrong with the current one?