QT 6.7 and camera dialog issues

[he_R0]

I am trying to display a dialog with a camera when a button is pressed, but the program keeps crashing when I attempt to start the camera in the constructor of the dialog class. What am I doing wrong? I am using QTcreator. The image below is what I see if I comment out the camera->start() line.

The classes for the widget and dialog are below:

widget + dialog

#include "item_w.h"
#include "ui_item_w.h"

item_w::item_w(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::item_w)
{
    ui->setupUi(this);

}

item_w::~item_w()
{
    delete ui;
}




void item_w::on_cam_img_btn_clicked()
{

    /*
    captureSession.setCamera(camera);
    viewfinder->show();
    captureSession.setVideoOutput(viewfinder);
    captureSession.setImageCapture(imageCapture);

    camera->start();
    imageCapture->capture();
    */
    cameraDialog *cDiag = new cameraDialog;
    cDiag->show();
}

#include "cameradialog.h"
#include "ui_cameradialog.h"

cameraDialog::cameraDialog(QWidget *parent)
    : QDialog(parent)
    , ui(new Ui::cameraDialog)
{
    ui->setupUi(this);

    captureSession.setCamera(camera);
    captureSession.setVideoOutput(ui->widget_camera_area);
    ui->widget_camera_area->show();
    qDebug();
    camera->start();

}

cameraDialog::~cameraDialog()
{
    camera->stop();
    delete camera;
    delete ui;
}

[Christian Ehrlicher]

@he_R0 said in QT 6.7 and camera dialog issues:

camera->start();

Where do you initialize this pointer?

ui->widget_camera_area->show();

Why? This is not needed at all.

[he_R0]

@Christian-Ehrlicher

Hello. The problem was with pointer initialization.

ui->widget_camera_area->show();

I removed this after correcting the pointer initialization in the file. Thanks