flickering_pilotredsun

from PIL import Image
import os, sys

# add the file name as the 1st argument to the script
imgpath = sys.argv[1]
img = Image.open(imgpath).convert("RGB")

w, h = img.size

# truncate so w and h are divisible by 2
w = w - (w % 2)
h = h - (h % 2)
img = img.crop((0, 0, w, h))
pixels = img.load()

# halve the dimensions
sw, sh = w // 2, h // 2

# image array
simgarr = [Image.new("RGB", (sw, sh)) for _ in range(4)]
spixelsarr = [simg.load() for simg in simgarr]
for y in range(h):
    for x in range(w):
        if x % 2: # x is 1
            if y % 2: # y is 1
                spixelsarr[3][x//2, y//2] = pixels[x, y]
            else: # y is 0
                spixelsarr[1][x//2, y//2] = pixels[x, y]
        else: # x is 0
            if y % 2: # y is 1
                spixelsarr[2][x//2, y//2] = pixels[x, y]
            else: # y is 0
                spixelsarr[0][x//2, y//2] = pixels[x, y]

# needed for good gif quality
simgarr = [x.quantize(dither=Image.NONE) for x in simgarr]

outpath = f"{os.path.splitext(imgpath)[0]}_animated.gif"
simgarr[0].save(outpath, save_all=True, append_images=simgarr[1: ], optimize=False, duration=60, loop=0, quality=95)
os.system(outpath)