Reinterpolation411-style script insertion

[Selur]

A.I. is saying the script hybrid generates has errors so I would appreciate help inserting the script properly (or confirming).

Care to elaborate? Without you showing the complete code Hybrid uses, I guess your code generator messed up.

Looking at your code:
(I assume this should do some strange 4:1:1 to 4:4:4 upsampling.)

def beforeDeinterlace(clip):
  # Separate planes; Personally I would use https://www.vapoursynth.com/doc/functions/video/splitplanes.html here
  y = core.std.ShufflePlanes(clip, 0, vs.GRAY)
  u = core.std.ShufflePlanes(clip, 1, vs.GRAY)
  v = core.std.ShufflePlanes(clip, 2, vs.GRAY)

  # Reduce to even columns; No clue why this is used (https://www.vapoursynth.com/doc/functions/video/selectevery.html). It does not make sense to me. I assume the intention was to do something like a SeparateFields ?
  u_even = core.std.SelectEvery(u, cycle=2, offsets=[0])
  v_even = core.std.SelectEvery(v, cycle=2, offsets=[0])

  # Resize to full width via horizontal interpolation; That seems fine. https://www.vapoursynth.com/doc/functions/video/resize.html
  u_interp = core.resize.Bicubic(u_even, width=clip.width, height=clip.height, src_left=0.25)
  v_interp = core.resize.Bicubic(v_even, width=clip.width, height=clip.height, src_left=0.25)

  # Merge back to YUV;  That seems fine
  return core.std.ShufflePlanes([y, u_interp, v_interp], [0, 0, 0], vs.YUV)

(Side note: Indentions are important in Python, so best use 'code'-tags when posting code.)
Assuming the syntax is correct, you need to let Hybrid know that after it the output is YUV444P8, by adding:

# colorformat YUV444P8

to the code, otherwise Hybrid wouldn't know that the color format changed to YUV444P8.
=> the whole code seems wrong to me

Cu Selur

Ps.: Machine learning models are not that good atm. with code generation of anything slightly complex. Especially when not provided with all the necessary information. If you can share a sample of the unprocessed source you feed Hybrid and properly explain what you aim to do, I probably could add a suggestion on what to do.