54 lines
1.5 KiB
C++
54 lines
1.5 KiB
C++
/**
|
|
@file videocapture_basic.cpp
|
|
@brief A very basic sample for using VideoCapture and VideoWriter
|
|
@author PkLab.net
|
|
@date Aug 24, 2016
|
|
*/
|
|
|
|
#include <opencv2/core.hpp>
|
|
#include <opencv2/videoio.hpp>
|
|
#include <opencv2/highgui.hpp>
|
|
#include <iostream>
|
|
#include <stdio.h>
|
|
|
|
using namespace cv;
|
|
using namespace std;
|
|
|
|
int main(int, char**)
|
|
{
|
|
Mat frame;
|
|
//--- INITIALIZE VIDEOCAPTURE
|
|
VideoCapture cap;
|
|
// open the default camera using default API
|
|
// cap.open(0);
|
|
// OR advance usage: select any API backend
|
|
int deviceID = 0; // 0 = open default camera
|
|
int apiID = cv::CAP_ANY; // 0 = autodetect default API
|
|
// open selected camera using selected API
|
|
cap.open(deviceID, apiID);
|
|
// check if we succeeded
|
|
if (!cap.isOpened()) {
|
|
cerr << "ERROR! Unable to open camera\n";
|
|
return -1;
|
|
}
|
|
|
|
//--- GRAB AND WRITE LOOP
|
|
cout << "Start grabbing" << endl
|
|
<< "Press any key to terminate" << endl;
|
|
for (;;)
|
|
{
|
|
// wait for a new frame from camera and store it into 'frame'
|
|
cap.read(frame);
|
|
// check if we succeeded
|
|
if (frame.empty()) {
|
|
cerr << "ERROR! blank frame grabbed\n";
|
|
break;
|
|
}
|
|
// show live and wait for a key with timeout long enough to show images
|
|
imshow("Live", frame);
|
|
if (waitKey(5) >= 0)
|
|
break;
|
|
}
|
|
// the camera will be deinitialized automatically in VideoCapture destructor
|
|
return 0;
|
|
}
|