Fedora OpenCV with Qt: The program has unexpectedly finished

Tamercan

I am trying to configure OpenCV with Qt Creator 2.7.0 (Qt 5.0.2) on Fedora 23 64bit. While executing my program, I get the following error:

The program has unexpectedly finished. Starting /home/tamercan/build-myfirst2-Desktop_Qt_5_7_0_GCC_64bit-Debug/myfirst2... /home/tamercan/build-myfirst2-Desktop_Qt_5_7_0_GCC_64bit-Debug/myfirst2 crashed.
This is my main.cpp

#include <opencv2/core/base.hpp>
#include <opencv2/core/mat.hpp>
#include <opencv2/core/types.hpp>
#include <opencv2/highgui/highgui_c.h>
#include <opencv2/highgui.hpp>
#include <opencv2/imgproc.hpp>
#include <opencv2/objdetect/objdetect_c.h>
#include <opencv2/objdetect.hpp>
#include <opencv2/videoio.hpp>
#include <iostream>
#include <vector>

using namespace cv;
using namespace std;

int main(int argc, char* argv[])
{
VideoCapture cap(0); // open the video camera no. 0

namedWindow("MyVideo",CV_WINDOW_AUTOSIZE); //create a window called "MyVideo"
// Load Face cascade (.xml file)
    CascadeClassifier face_cascade;
    face_cascade.load( "xml/haarcascade_frontalface_alt.xml" );

while (1)
{
    Mat frame;

    bool bSuccess = cap.read(frame); // read a new frame from video

     if (!bSuccess) //if not success, break loop
    {
         cout << "Cannot read a frame from video stream" << endl;
         break;
    }
     // Detect faces
         std::vector<Rect> faces;
         face_cascade.detectMultiScale( frame, faces, 1.1, 2, 0|CV_HAAR_SCALE_IMAGE, Size(30, 30) );

         // Draw circles on the detected faces
         for( int i = 0; i < faces.size(); i++ )
         {
             Point center( faces[i].x + faces[i].width*0.5, faces[i].y + faces[i].height*0.5 );
             ellipse( frame, center, Size( faces[i].width*0.5, faces[i].height*0.5), 0, 0, 360, Scalar( 255, 0, 255 ), 4, 8, 0 );


                 imshow( "Detected Face", frame );
         }



             //rectangle( frame, center, Size( faces[i].width*2, faces[i].height*2), Scalar( 255, 0, 255 ) );




    if (waitKey(30) == 27) //wait for 'esc' key press for 30ms. If 'esc' key is pressed, break loop
   {
        cout << "esc key is pressed by user" << endl;
        break;
   }
}
return 0;

}
My .pro file is

QT += core
QT -= gui

CONFIG += c++11

TARGET = myfirst2
CONFIG += console
CONFIG -= app_bundle

QMAKE_DEFAULT_INCDIRS="" && make

TEMPLATE = app

SOURCES += main.cpp

INCLUDEPATH += /usr/include/
LIBS += -L/usr/lib -lopencv_core -lopencv_highgui -lopencv_video -lopencv_videoio -lopencv_

jsulm

@Tamercan How is it related to Qt? Where does it crash? Did you try to debug to see where it crashes?

Tamercan

@jsulm I didnt try to debug.When i add opencv library to my project it crashes.it works normally

jsulm

@Tamercan When you should debug to wee where it crashes. This is actually the first thing to do in such a situation.