GIF 动图的分解与合成

from PIL import Image
import os

def gifSplit(gif_path, save_path, suffix="png"):
    img = Image.open(gif_path)
    for i in range(img.n_frames):
        img.seek(i)
        new = Image.new("RGBA", img.size)
        new.paste(img)
        new.save(os.path.join(save_path, "%d.%s" %(i, suffix)))

def gifSplit2Array(gif_path, save_path):
    import numpy as np
    img = Image.open(gif_path)
    for i in range(img.n_frames):
        img.seek(i)
        new = Image.new("RGBA", img.size)              
        new.paste(img)
        arr = np.array(new).astype(np.uint8)  # image: img (PIL Image):
        yield arr[:,:,2::-1] # 逆序（RGB 转BGR), 舍弃alpha通道, 输出数组供openCV使用

import cv2
for img in gifSplit2Array("drop.gif", r"./gif splited"):
    cv2.imshow("gif", img)
    cv2.waitKey(40) #加入延迟

def create_gif(imagesPath, gif_name, duration=0.3, reverse =False):
    import imageio
    fileNames = os.listdir(imagesPath)
    frames = [] #列表，用于存储各个帧
    fileList = os.listdir(imagesPath)
    if reverse: fileList.sort(reverse=True)
    for file in fileList:
        fullpath = os.path.join(imagesPath, file)
        frames.append(imageio.imread(fullpath))#添加帧数据
    imageio.mimsave(gif_name, frames, 'GIF', duration=duration)#合成

 create_gif(r"./gif splited","merged.gif", duration =0.3, reverse = True)