将视频转换为图片

import cv2 as cv
import os
# os.mkdir('./pic')
video_path = '3.mp4'
video = cv.VideoCapture(video_path)
i = 3542
while True:
    ret, frame = video.read()
    if ret:
        cv.imwrite('pic/{}.jpg'.format(i), frame)
        i += 1
    else:
        print("DONE")
        break