opencv截取视频帧并保存为图片。

#include <stdio.h>
#include <string>
#include <iostream>
#include <io.h>
#include <fstream>
#include <vector>
#include <opencv2/opencv.hpp>

using namespace std;
using namespace cv;

int main()
{
	VideoCapture capture("C:\\Users\\admin\\Desktop\\1.mp4");
	int i = 0;
	//std::string image_name;
	char image_name[20];
	while (1)
	{
		Mat frame;
		capture >> frame;
		imshow("dqsp", frame);

		//转换格式
		sprintf_s(image_name, "%s%d%s", "image", i, ".jpg");
		std::string str(image_name);
		
		cv::imwrite("C:\\Users\\admin\\Desktop\\newimages\\" +str, frame);
		waitKey(30);
		i++;
	}
	return 0;
}