syncvideo.cpp

// Copyright: Jan Kučera, 2014
// Code available under GPLv3 license
// License text available at: http://www.gnu.org/copyleft/gpl.html

#include "opencv2/opencv.hpp"
#include <iostream>
#include <fstream>

using namespace cv;
using namespace std;

int main()
{
    int index = 0;

    // open cameras
    VideoCapture cap1(0);       // LEFT camera
    VideoCapture cap2(1);       // RIGHT camera

    // check if we succeeded
    if(!cap1.isOpened()) return -1;
    if(!cap2.isOpened()) return -1;

    cap1.set(CV_CAP_PROP_FRAME_WIDTH, 1920);
    cap1.set(CV_CAP_PROP_FRAME_HEIGHT, 1080);
    cap2.set(CV_CAP_PROP_FRAME_WIDTH, 1920);
    cap2.set(CV_CAP_PROP_FRAME_HEIGHT, 1080);

    // create windows
    namedWindow("edges1",1);
    namedWindow("edges2",1);

    long key;

    // create matrices for camera images
    Mat frame1;
    Mat frame2;

    // main loop
    for(;;) {

        index++;

        // detect key pressed
        key = waitKey(1000);

        // get a new frame from cameras
        cap1 >> frame1;
        cap2 >> frame2;

        // every Xth iteration
        // if (index % 100 == 0) {

            // define variables for strings
            std::string fileName1;
            std::string fileName2;
            // define variables for conversion of int to string
            std::stringstream string1;
            std::stringstream string2;

            // create file paths and names from constant and numbered index
            string1 << "images/image_L_" << index << ".ppm";
            string2 << "images/image_R_" << index << ".ppm";

            // convert it to string
            fileName1 = string1.str();
            fileName2 = string2.str();

            // save image files
            // imwrite(fileName1, frame1);
            // imwrite(fileName2, frame2);
        // }

        // downscale to 33%
        Size imageSize(640,360);
        resize(frame1,frame1,imageSize);
        resize(frame2,frame2,imageSize);

        // show camera images
        imshow("edges1", frame1);
        imshow("edges2", frame2);

        // if key was pressed
        if (key >= 0) {

            // if ESC is pressed - quit
            if (key == 1048603) {
                return 0;
            }
        }
    }
}