process_video.py

import cv2
import sys


def run(video_path):

    cap = cv2.VideoCapture(video_path)
    if not cap.isOpened():
        print video_path, 'doesn\'t exist'
        sys.exit()

    frame_num_curr = int(cap.get(cv2.cv.CV_CAP_PROP_POS_FRAMES))
    frame_num_total = int(cap.get(cv2.cv.CV_CAP_PROP_FRAME_COUNT))

    while True:
        flag, frame_bgr = cap.read()
        if flag:
            frame_num_curr = int(cap.get(cv2.cv.CV_CAP_PROP_POS_FRAMES))
            process(frame_bgr, frame_num_curr, frame_num_total)
            if frame_num_curr == frame_num_total:
                break
        else:
            print 'Error reading frame'

    print 'Read all images'


def process(frame, frame_num_curr, frame_num_total):

	cv2.imshow('lol', frame)
	cv2.waitKey(33)


if __name__ == '__main__':

	run(sys.argv[1])