Deoldify Vapoursynth filter

[Dan64]

I end up using Pillow and OpenCV.
This version is only 5% slower (imput format of clips is RGB24)

def AdaptiveMerge4(clipa: vs.VideoNode = None, clipb: vs.VideoNode = None, clipb_weight: float = 0.0) -> vs.VideoNode:
    #Python version with constants hard-coded
    def merge_frame(n, f):               
        img1 = frame_to_image(f[0])
        img2 = frame_to_image(f[1])
        luma = get_pil_brightness(img2)
        #vs.core.log_message(2, "Luma(" + str(n) + ") = " + str(luma))       
        brightness = min(1.2 * luma, 1)
        w = max(0.5 * brightness, 0.15)
        img_m = Image.blend(img1, img2, w)       
        return image_to_frame(img_m, f[0].copy())               
    clipm = clipa.std.ModifyFrame(clips=[clipa, clipb], selector=merge_frame)
    return clipm


def get_pil_brightness(img: Image) -> float:
    img_np = np.asarray(img)
    hsv = cv2.cvtColor(img_np, cv2.COLOR_RGB2HSV)
    brightness = np.mean(hsv[:,:, 2])
    return (brightness/255)

But I'm not happy about this solution, because is only a patch to DDColor.
I'm thinking to develop a Temporal Chroma Smoother for DDColor, but I still have to find a way on how implement it.

Thanks,
Dan