import cv2
import os
import random
import glob
VideoWriter = cv2.VideoWriter ("merge .avi", cv2.VideoWriter_fourcc ('X','V', 'I', 'D'), 24,(600,480))
mp4list = glob.glob(os.path.join("../","*.mp4"))

for mp4file in mp4list:
    capture = cv2 .VideoCapture("../{}".format(mp4file))
    fps = capture.get (cv2.CAP_PROP_FPS)
    if capture.isOpened() :
        i=0
        # 每隔视频提取10秒
        while i < fps * 10:
            i+=1
            ret, prev =capture.read()
            if ret:
                if fps == 24:
                    VideoWriter.write (prev)
                else:
                    
                    # 这里可以写一些丢帧数的条件例如elif fps%2==0
                    VideoWriter.write (prev)
            else :
                break
VideoWriter.release ()
cv2.destroyAllWindows()