/**************************************************************************************************************************
文件说明:
视频截图
运行环境:
Win10+VS2013+OpenCv3
时间地点:
陕西师范大学 文津楼 2017.8.5
作 者:
九 月
***************************************************************************************************************************/
#include <opencv2/objdetect/objdetect.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv.hpp>
#include <iostream>
#include <vector>
#include <stdio.h>
using namespace cv;
using namespace std;
int process(VideoCapture& capture)
{
int n = 0;
char filename[200];
string window_name = "video | q or esc to quit";
std::cout << "按下【Space】空格键可以截图" << std::endl;
std::cout <<"【Esc】和【q】键 - 退出程序" << endl;
namedWindow(window_name, CV_WINDOW_KEEPRATIO); //resizable window;
cv::Mat frame;
for (;;)
{
capture >> frame;
if (frame.empty())break;
cv::Mat gray;
cv::cvtColor(frame, gray, COLOR_RGB2GRAY);
std::vector<string> codes;
cv::Mat corners;
cv::imshow(window_name, frame);
char key = (char)waitKey(1);
switch (key)
{
case 'q':
case 'Q':
case 27: //[1]escape key
return 0;
case ' ': //[2]Save an image
sprintf(filename, "D:\\OpenCvDemo\\VideoScreen\\VideoScreen\\screenImg\\%.3d.png", n++);
imwrite(filename, frame);
cout << "\n\t>保存了 " << filename << "文件到工程目录下" << endl;
break;
default:
break;
}
}
return 0;
}
/**************************************************************************************************************************
函数说明:
主函数
功能描述:
控制台应用程序的入口函数，我们的程序从这里开始
***************************************************************************************************************************/
int main(int argc,char** argv)
{
VideoCapture capture("D:\\MSR_original\\MSR_original\\Img\\03.mpeg"); //从文件载入视频
//VideoCapture capture(0); //从摄像头载入视频
if (!capture.isOpened())
{
std::cerr << "Failed to open a video device or video file!\n" << endl;
return 1;
}
return process(capture);
}
