Save video frame by frame with Python OpenCV

import cv2
import os
 
def extractFrames(pathIn, pathOut):
    if not os.path.exists(pathOut):
        os.mkdir(pathOut)
 
    cap = cv2.VideoCapture(pathIn)
    count = 0
 
    while (cap.isOpened()):
 
        ret, frame = cap.read()
 
        if ret == True:
            cv2.imwrite(os.path.join(pathOut, "frame_{:06d}.jpg ".format(count)), frame)
            count += 1
        else:
            break
 
    cap.release()
    cv2.destroyAllWindows()
 
def main():
    extractFrames('video.mp4', 'outputdir')
 
if __name__=="__main__":
    main()

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