cv2 videocapture python set frame rate

1#on efficient solution
2
3frame_rate = 10
4prev = 0
5
6while capturing:
7
8    time_elapsed = time.time() - prev
9    res, image = cap.read()
10
11    if time_elapsed > 1./frame_rate:
12        prev = time.time()
13
14        # Do something with your image here.
15        process_image()