Deoldify Vapoursynth filter

[Selur]

Ahh,..
chroma_resize_enabled is always true, which calls _clip_chroma_resize, which calls vs_recover_clip_luma
which is:

def vs_recover_clip_luma(orig: vs.VideoNode = None, clip: vs.VideoNode = None) -> vs.VideoNode:
    def copy_luma_frame(n, f):    
        img_orig = frame_to_image(f[0])
        img_clip = frame_to_image(f[1])        
        img_m = chroma_post_process(img_clip, img_orig)
        return image_to_frame(img_m, f[0].copy())                
    clip = clip.std.ModifyFrame(clips=[orig, clip], selector=copy_luma_frame)
    return clip

def chroma_post_process(img_m: Image, orig: Image) -> Image:
    img_np = np.asarray(img_m)
    orig_np = np.asarray(orig)
    img_yuv = cv2.cvtColor(img_np, cv2.COLOR_RGB2YUV)
    # copy the chroma parametrs "U", "V", of "img_m" in "orig"
    orig_yuv = cv2.cvtColor(orig_np, cv2.COLOR_RGB2YUV)
    orig_copy = np.copy(orig_yuv)
    orig_copy[:, :, 1:3] = img_yuv[:, :, 1:3]
    img_np_new = cv2.cvtColor(orig_copy, cv2.COLOR_YUV2RGB)
    return Image.fromarray(img_np_new)

which hopefully does the correct thing and is similar fast do Vapoursynth ShufflePlanes.

Cu Selur