C++ avi player - Open CV

starkman

Hello all,

I have been having some problems with using Open CV to play an avi file.

I am currently creating a eye input based system, where the mouse is replaced by an eye tracker. I am currently working on flat .csv files, and importing the coordinates then using those coordinates to do various tasks on the screen.

These coordinates have been recorded using a real eye tracker which creates two files, a .csv file of the coordinates of they eye movement and an avi file.

In essence what i am trying to achieve is to run the video in tandem with my self created code for the processing of the moues movements.

I have been advised to use Open CV for this, however i cannot seem to find a tutorial that shows me how to process an avi file and play it. This is very frustrating as i have seen many people comment on the ease of OpenCV yet i can't find any examples which aren't overly complicated! The file in question is named "test_00003.avi"

Leaving my rant behind :) I was hoping i may be able to open my question to a wider audience who may be able to help me in understanding how to create a simple, full screen avi player.

Kind Regards,
David

PS for additional information, I am currently using XP, Using Visual C++

Here is my code that i have attempted to make work :D

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        CvCapture* capture = 0;

    IplImage *frame, *frame_copy = 0;

    static CvMemStorage* storage = cvCreateMemStorage(0);
 
    capture = cvCaptureFromAVI( "test_00003.avi" );
 
    cvNamedWindow( "Picture:", 1 );
 
    if( capture )

    {

        for(;;)

        {

            if( !cvGrabFrame( capture ))

                break;

            frame = cvRetrieveFrame( capture );

            if( !frame )

                break;

            if( !frame_copy )

                frame_copy = cvCreateImage(

cvSize(frame->width,frame->height),

                                            IPL_DEPTH_8U,

frame->nChannels );

            if( frame->origin == IPL_ORIGIN_TL )

                cvCopy( frame, frame_copy, 0 );

            else

                cvFlip( frame, frame_copy, 0 );
 
            cvShowImage("Picture:",frame_copy);
 
            // Varying this will vary the speed of the avi file

            if( cvWaitKey( 20 ) >= 0 )

                break;

        }
 
        cvReleaseImage( &frame_copy );

        cvReleaseCapture( &capture );

    }
 
    cvClearMemStorage( storage );   

    cvDestroyWindow("Picture:");

}

C++ avi player - Open CV

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