opencv读取多个摄像头并保存当前视频流图片

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【OpenCV】利用Flask+Python+OpenCV实现摄像头读取图像帧网页视频流 利用Flask+Python+OpenCV实现摄像头读取图像帧网页视频流 阅读详情

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <ctime>
#include <QDebug>
#include <string.h>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::on_pushButton_clicked()
{

capture();

}
int MainWindow::capture(){

    //initialize and allocate memory to load the video stream from camera
    cv::VideoCapture camera0;
    camera0.open(0);
    camera0.set(CV_CAP_PROP_FRAME_WIDTH,640);
    camera0.set(CV_CAP_PROP_FRAME_HEIGHT,480);

    cv::VideoCapture camera1;
    camera1.open(1);
    camera1.set(CV_CAP_PROP_FRAME_WIDTH,640);
    camera1.set(CV_CAP_PROP_FRAME_HEIGHT,480);

    cv::VideoCapture camera2;
    camera2.open(2);
    camera2.set(CV_CAP_PROP_FRAME_WIDTH,640);
    camera2.set(CV_CAP_PROP_FRAME_HEIGHT,480);

    cv::VideoCapture camera3;