c++ - 调用 `cvCreateCameraCapture(-1)`时异常终止

Question

我的代码如下。当我在 openCamera 中执行 cvCreateCameraCapture(-1) 时，应用程序结束。

提示:程序异常终止。在启动过程中程序以代码 0X000135 退出

为什么？电脑是笔记本，内置摄像头。

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    return a.exec();
}

>

#include<highgui.h>
#include<cv.h>

class MainWindow : public QMainWindow
{
    Q_OBJECT  
public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();

private slots:
    void openCamera();
    void readFrame();
    void closeCamera();
    void takingPhote();

private:
    Ui::MainWindow *ui;
    QTimer* timer;
    QImage* image;
    CvCapture* cam;
    IplImage* frame;
};

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    cam = NULL;
    timer = new QTimer(this);
    image = new QImage;

    connect(ui->openCamera, SIGNAL(clicked()), this, SLOT(openCamera()));
}

void MainWindow::openCamera()
{
   cam = cvCreateCameraCapture(-1);
   // timer->start(33);
   // connect(timer, SIGNAL(timeout()), this, SLOT(readFrame()));
}

Answer 1

添加我之前的评论作为答案，因为它帮助您解决了问题:

I want you to replace the cvCreateCameraCapture() call for something else, like cvWaitKey(0);. If this is a runtime issue related to environment variables and Windows not finding OpenCV, this simple test will show. So, if it continues to crash then it might really be related to the environment configuration.