55 lines
1.4 KiB
Markdown
55 lines
1.4 KiB
Markdown
# 利用opencv录制视频
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``` cpp
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#include <opencv2/core.hpp>
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#include <opencv2/imgcodecs.hpp>
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#include <opencv2/highgui.hpp>
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#include <opencv2/imgproc.hpp>
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#include <iostream>
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using namespace cv;
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using namespace std;
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int main( )
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{
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VideoCapture capture(0);//如果是笔记本，0打开的是自带的摄像头，1 打开外接的相机
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Mat img;
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VideoWriter vw; //新建一个多媒体文件
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namedWindow( "cam" );
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int fps = capture.get(CAP_PROP_FPS ); //获取摄像头的帧率
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cout << capture.get( CAP_PROP_FRAME_WIDTH )<<capture.get( CAP_PROP_FRAME_HEIGHT )<<fps<<endl;
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if(fps <= 0 )fps = 25;
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//设置视频的格式
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vw.open( "out.avi", VideoWriter::fourcc( 'x', '2', '6', '4' ), fps, Size( capture.get( CAP_PROP_FRAME_WIDTH ), capture.get( CAP_PROP_FRAME_HEIGHT ) ) );
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if(!capture.isOpened( )) //判断摄像头是否打开
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{
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cout << "open video faild";
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return 0;
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}
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cout << "open video success" << endl;
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if(!vw.isOpened()) //判断视频文件是否创建
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{
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cout << "open vw faild"<< endl;
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}
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cout << "open vw success" << endl;
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while(1)
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{
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capture.read( img); //读取视频帧
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if(img.empty( ))
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break;
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imshow("cam", img ); //显示视频帧
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vw.write( img ); //将视频帧写入文件
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if(waitKey( 10 ) == 'q') //q键退出录制
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break;
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}
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return 0;
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}
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``` |