複数のアニメーション画像をタイル状に並べて一つの画像にするスクリプト

tile-anim.py

#!/usr/bin/env python3

x = 3
y = 2
background = "white"
gap = 10
duration = 100
anims = [
    "APNGs/a1.png",
    "APNGs/a2.png",
    "APNGs/a3.png",
    "APNGs/a4.png",
    "APNGs/a5.png",
    "APNGs/a6.png",
]
out = "out.png"

import itertools
from PIL import Image, ImageSequence

def tile(x, y, imgs, gap, background):
    imgs = iter(imgs)
    img = next(imgs)
    w, h = img.size
    canvas = Image.new("RGB", (w * x + gap * (x - 1), h * y + gap * (y - 1)), background)
    for j, i in itertools.product(range(y), range(x)):
        canvas.paste(img, (i * (w + gap), j * (h + gap)))
        img = next(imgs, None)
        if img is None:
            break
        img = img.convert("RGB")
    return canvas

images = []
for frames in zip(*[ImageSequence.Iterator(Image.open(anim)) for anim in anims]):
    frame = tile(x, y, frames, gap, background)
    images.append(frame)
images[0].save(out, save_all=True, duration=duration, append_images=images[1:], loop=0)