ftf.py

def fix_telecined_fades(clip: vs.VideoNode, color: float | list[float] = 0.0) -> vs.VideoNode:
    if clip.format.color_family == vs.RGB:
        raise ValueError("fix_telecined_fades: Input must be YUV or GRAY!")
    if clip.format.sample_type != vs.FLOAT:
        raise ValueError("fix_telecined_fades: Input must be FLOAT!")

    if not isinstance(color, list):
        color = [color] * clip.format.num_planes
    expr = []

    clip = clip.std.Limiter().std.SeparateFields().std.PlaneStats()

    for i in range(clip.format.num_planes):
        expr += f"x.PlaneStatsAverage {color[i]} - AVG! AVG@ 0 = x x {color[i]} - AVG@ y.PlaneStatsAverage {color[i]} - + 2 / AVG@ / * ? {color[i]} +",

    fe, fo = clip[::2], clip[1::2]

    ffix = (
        core.akarin.Expr([fe, fo], expr),
        core.akarin.Expr([fo, fe], expr),
    )
    return core.std.Interleave(ffix).std.DoubleWeave()[::2]