the first qt-opencv program

Question

My error is:

error: C2228: left of '.open' must have class/struct/union and i dont know to fix that.

#include "dialog.h"
#include "ui_dialog.h"
#include <QTimer>
#include <stdio.h>
#include <iostream>
#include <opencv2\video\video.hpp>
#include <opencv2\opencv.hpp>
#include "opencv2/imgproc/imgproc.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/flann/miniflann.hpp"

using namespace cv; <i> all the new API is put into "cv" namespace. Export its content</i>
using namespace std;

Dialog::Dialog(QWidget *parent) : QDialog(parent),ui(new Ui::Dialog){
    ui->setupUi(this);
    capture.open("E:\\Six Degree of Separation.avi");
    tmrTimer = new QTimer(this);
    connect(tmrTimer,SIGNAL(timeout()),this,SLOT(ProcessFrameAndUpdateGUI()));
    tmrTimer ->start(20);
}

Where has `capture` come from? – cmannett85 Apr 26 '13 at 11:22 — cmannett85, Apr 26 '13 at 11:22
capture->open("E:\\Six Degree of Separation.avi"); – LovaBill Apr 26 '13 at 11:47 — LovaBill, Apr 26 '13 at 11:47
@Willy That's not where it was created. – cmannett85 Apr 26 '13 at 12:20 — cmannett85, Apr 26 '13 at 12:20

score 1 · Answer 1 · answered Apr 26 '13 at 11:44

1

There should be an instance of cv::VideoCapture capture;. You can check whether it is open with capture.isOpened(). It returns true if the file was open successfully or if the camera has been initialized successfully.

answered Apr 26 '13 at 11:44

Eric

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the first qt-opencv program

1 Answers1