使用Python实现跳帧截取视频帧

import cv2
import os

def 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()