opencv3按鍵儲存錄影機圖像序列，更改分辨率

#include "opencv2/highgui/highgui.hpp"
#include <iostream>
#include <atltime.h>
using namespace cv;
using namespace std;
string GetCurTime()
{
	time_t rawtime;
	struct tm * timeinfo;
	char buffer[128] = { 0 };
	time(&rawtime);
	timeinfo = localtime(&rawtime);
	strftime(buffer, sizeof(buffer), "%m-%d-%H-%M-%S", timeinfo);//月-日-時-分-秒
	return string(buffer);
}

int main()

{
	

	VideoCapture capture(1);

	if (!capture.isOpened()) { //判斷能夠打開攝像頭  

		cout << "can not open the camera" << endl;

		cin.get();

		exit(1);

	}

	capture.set(CV_CAP_PROP_FRAME_WIDTH, 1280);

	capture.set(CV_CAP_PROP_FRAME_HEIGHT, 960);

	int count = 0;


	while (1) {

		Mat frame;

		capture >> frame; //載入圖像  



		if (frame.empty()) { //判斷圖像是否載入  

			cout << "can not load the frame" << endl;

		}
		else {

			count++;

			if (count == 1) {

				cout << frame.cols << "  " << frame.rows << endl;

			}

			imshow("camera", frame);

			char c = waitKey(30); //延時30毫秒  
			GetCurTime();
			//按 s 鍵儲存成 jpg 檔
			if (c == 's'){
				
				string filename = GetCurTime() + ".jpg";
				imwrite(filename,frame);
				cout << "儲存圖檔：" << filename << endl;
			}
			
			if (c == 27) //按ESC鍵退出  

				break;

		}

	}
	
	return 0;

}