使用Python实现跳帧截取视频帧

import cv2import osdef save_img(): video_path =r'读入视频路径' videos = os.listdir(video_path) for video_name in videos:   videopath=video_path+'//'+video_name   print(videopath)   vc = cv2.VideoCapture(videopath) #读入视频文件     c = 1   if vc.isOpened(): # 判断是否正常打开   rval, frame = vc.read()   else:   rval = False    timeF = 300 # 视频帧计数间隔频率   a=1   while rval: # 循环读取视频帧   rval, frame = vc.read()   if (c % timeF == 0): # 每隔timeF帧进行存储操作    print(video_path+'//' + str(a) + '.jpg')    #不能在D:盘原视频目录上保存图像文件，原因不明    cv2.imwrite(r'保存图片文件路径 '+'//'+ str(a) + '.jpg', frame)    cv2.imshow('Video',frame)    a+=1   c = c + 1   m=cv2.waitKey(1)   vc.release()save_img()