python视频转图片

import cv2

capture = cv2.VideoCapture('car.avi')
cnt=0
while(1):
  ret, frame = capture.read()
  cv2.imshow("results", frame)
  tmp='00000'+str(cnt)
  cv2.imwrite('car/'+tmp[-5:]+'.jpg', frame)
  cnt+=1
  c = cv2.waitKey(5) & 0xff
  if c == 27:
     cv2.destroyAllWindows()
     capture.release()
     break;