打开Python开发工具IDLE，新建‘changeGif.py’文件，将gif的每一帧取出，保存成一张张图片，这里用png格式，也可以用jpg但是

jpg需要转换一次，代码如下：

from PIL import Image,ImageSequence

import os

gifPath = 'c:\\t.gif'

oriGif = Image.open(gifPath)

lifeTime = oriGif.info['duration']

imgList = []

for i in ImageSequence.Iterator(oriGif):

print (i.copy())

imgList.append(i.copy())

for index,f in enumerate(imgList):

f.save("c:\\gif\\%d.png" % index)

将每帧图片缩小尺寸后，再次合成gif，代码如下：

from PIL import Image,ImageSequence

import os

gifPath = 'c:\\t.gif'

oriGif = Image.open(gifPath)

lifeTime = oriGif.info['duration']

imgList = []

imgNew = []

for i in ImageSequence.Iterator(oriGif):

print (i.copy())

imgList.append(i.copy())

for index,f in enumerate(imgList):

f.save("c:\\gif\\%d.png" % index)

img = Image.open("c:\\gif\\%d.png" % index)

img.thumbnail((200,100),Image.ANTIALIAS)

imgNew.append(img)

imgNew[0].save("c:\\new.gif",'gif',save_all=True,append_images=imgNew[1:],loop=0,

duration=lifeTime)