# gifurl = 'https://64.media.tumblr.com/15d6395f97f2d12e32a764c4a17be406/699471e89e1d5634-11/s500x750/eabb9c7c1ea719d4b9889d8e0217a878ed3f7a3f.gifv'

gifurl = 'https://64.media.tumblr.com/3decdb9824c82cc625396d5162b9c72c/tumblr_ohqkj1wMvh1qckzoqo2_500.gifv'

im = imageio.get_reader(gifurl)
# print(im)

from openpiv.tools import rgb2gray

images = []
for frame in im:
    images.append(rgb2gray(frame))

for I,J in zip(images[25:-1],images[26:]):
    simple_piv(I,J)