application doesn't run

[oujeboland]

hi , i'm new in opencv applications programming . i want to play a movie with a simple code(second excercise of bradski & kaehler book) , but the application doesn't play the movie and doesn't show any windows. everything seem to be good. no error exists . but i don't exactly know what happens?did i forget something?

[melfnt]

Can you post the code?

[oujeboland]

#include "highgui.h"

int main( int argc, char** argv )
{
    cvNamedWindow( "Example2", CV_WINDOW_AUTOSIZE );
    //CvCapture* capture = cvCaptureFromAVI( argv[1] ); // either one will work
    CvCapture* capture =
            cvCreateFileCapture( "/home/ubuntu12/workspace-opencv/excC/excC/Debug/test.avi" );
    IplImage* frame;
    while(1) {
        frame = cvQueryFrame( capture );
        if( !frame ) break;
        cvShowImage( "Example2", frame );
        char c = cvWaitKey(33);
        if( c == 27 ) break;
    }
    cvReleaseCapture( &capture );
    cvDestroyWindow( "Example2" );
    return 0;
}

[melfnt]

On my computer it runs flawlessly.
How do you compile?

I use:

g++ cv.cpp -o cv `pkg-config --libs --cflags opencv`

And execute with

./cv

Did you install the library?
Do you have any compilation error?