Python+opencv将图片生成成视频

import cv2

fps = 16  
size = (width,height) 
videowriter = cv2.VideoWriter("a.avi",cv2.VideoWriter_fourcc('M','J','P','G'),fps,size)

for i in range(1,200):
    img = cv2.imread('%d'.jpg % i)
    videowriter.write(img)