clippedmask.py

def clippedmask(clip, vertical=False, threshold: list = None, columns: list = None, rows: list = None):
    expr = f"x {threshold[0]} <= x {threshold[1]} >= or "

    if vertical:
        positions = rows
        direction = "Y"
    else:
        positions = columns
        direction = "X"

    for i in range(len(positions)):
        expr += f"{direction} {positions[i]} = "
        if i > 0:
            expr += "or "
    expr += "and 255 0 ?"
    return clip.akarin.Expr(expr, format=vs.GRAY8)