@shared_task
def parse_video(rtsp_address=None):
  winname = 'Video'
  if not rtsp_address:
    raise exceptions.ParseError('摄像头rstp地址错误!')

  cap = cv2.VideoCapture(rtsp_address)
  if not cap.isOpened():
    raise exceptions.ParseError('视频播放失败!')

  while cap.isOpened():
    ret, frame = cap.read()
    if not ret:
      break

    cv2.putText(frame, 'Please press "ESC" to close the window', (900, 20), cv2.FONT_HERSHEY_SIMPLEX, 0.5, (55, 255, 155), 1)
    cv2.imshow(winname, frame)
    k = cv2.waitKey(1)

    if cv2.getWindowProperty(winname, cv2.WND_PROP_AUTOSIZE) < 1:
      break
    if k == 27:
      break

  cap.release()
  cv2.destroyAllWindows()