关于opencv不能读取GIF图片

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由于license的原因，无法读取GIF：http://answers.opencv.org/question/185929/how-to-read-gif-in-python/

但是可以用其他库（PIL，Imageio）读取，保存为PNG，JPG的图片，然后opencv就能读取了

https://stackoverflow.com/questions/18502508/is-there-a-way-to-read-a-truncated-gif-with-pil

import cv2
from PIL import Image
gif = cv2.VideoCapture('file.gif')
ret,frame = gif.read() # ret=True if it finds a frame else False. Since your gif contains only one frame, the next read() will give you ret=False
img = Image.fromarray(frame)
img = img.convert('RGB')