Opencv3.4.0实现视频中的帧保存为图片功能

import time

import cv2

if __name__ == '__main__':
  # 填写视频的绝对路径
  vidcap = cv2.VideoCapture('/home/shushi/video/猎场.mp4')
  success, image = vidcap.read()
  start_time = time.time()
  print(start_time)

  while success:
    end_time = time.time()
    file_name = str(end_time).replace('.', '')
    # 每隔三秒截屏
    if 3 == int(end_time - start_time):
      start_time = end_time
      # 保存JGP 的绝对路径
      cv2.imwrite('/home/shushi/video/' + file_name + ".jpg", image) # save frame as JPEG file
    success, image = vidcap.read()
    if cv2.waitKey(10) == 27: # exit if Escape is hit
      break

#include <opencv2/highgui/highgui.hpp>
#include<opencv2/imgproc/imgproc.hpp>
#include <iostream>
 
 
int main(int argc, char **argv)
 
{
 
 //打开视频文件
 
 cv::VideoCapture cap("E:\\New folder\\DSC_3543.MOV");
 
 if (!cap.isOpened())
 {
 std::cout << "不能打开视频文件" << std::endl;
 return -1;
 }
 
 //从3000ms开始播放视频 
 //cap.set(CV_CAP_PROP_POS_MSEC, 3000);
 //获取视频的帧速率
 
 double fps = cap.get(cv::CAP_PROP_FPS);
 double width = cap.get(cv::CAP_PROP_FRAME_WIDTH);
 double height = cap.get(cv::CAP_PROP_FRAME_HEIGHT);
 
 //std::cout << fps << std::endl;
 //std::cout << width << std::endl;
 //std::cout << height << std::endl;
 
 
 cv::VideoWriter wrt("C:\\Users\\Administrator\\Desktop\\1.avi", CV_FOURCC('M', 'J', 'P', 'G'), fps, cv::Size(width, height));
 int cout = 0;
 while (true)
 
 {
 
 cv::Mat frame;
 
 //从视频中读取一个帧
 
 bool bSuccess = cap.read(frame);
 ++cout;
 if (!bSuccess)
 
 {
 
  std::cout << "不能从视频文件读取帧" << std::endl;
 
  break;
 
 }
 
 //在MyVideo窗口上显示当前帧
 if (cout>=fps*1 && cout<=fps*56)//取视频1-56秒内容
 {
  std::cout << "正在截取..."<<(int)(((cout-fps)/(fps*(56-1)))*100)<<"%" << std::endl;
  wrt << frame;
 }
 
 
 if (cout>fps*57)
 {
  std::cout << "ENd!!!" << std::endl;
  break;
 }
 
 }
 system("pause");
 return 0;
 
}