import cv2
import numpy
import time
import sys

filename = sys.argv[1]

vs = cv2.VideoCapture(filename)

more = True
framecounter = 0
start_time = time.time()

while more:
    framecounter += 1
    frame = vs.read()
    more = frame[0]

stop_time = time.time()
duration = stop_time - start_time

print("Filename: {}".format(filename))
print("Elapsed : {0:.2f} s".format(duration))
print("FPS     : {0:.2f} fps".format(framecounter/duration))
print("\n")

000 [enrico@HAL9000]: .../m_det_py $ python test.py test_11.mp4 && python test.py test_30.mp4 && python test.py test_59.mp4
Filename: test_11.mp4
Elapsed : 29.91 s
FPS     : 11.07 fps


Filename: test_30.mp4
Elapsed : 29.99 s
FPS     : 29.91 fps


Filename: test_59.mp4
Elapsed : 8.59 s
FPS     : 60.16 fps