camera.h Example File

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 #ifndef CAMERA_H
 #define CAMERA_H

 #include <QCamera>
 #include <QCameraImageCapture>
 #include <QMediaRecorder>
 #include <QScopedPointer>

 #include <QMainWindow>

 namespace Ui { class Camera; }

 class Camera : public QMainWindow
 {
     Q_OBJECT

 public:
     Camera();

 private slots:
     void setCamera(const QCameraInfo &cameraInfo);

     void startCamera();
     void stopCamera();

     void record();
     void pause();
     void stop();
     void setMuted(bool);

     void toggleLock();
     void takeImage();
     void displayCaptureError(int, QCameraImageCapture::Error, const QString &errorString);

     void configureCaptureSettings();
     void configureVideoSettings();
     void configureImageSettings();

     void displayRecorderError();
     void displayCameraError();

     void updateCameraDevice(QAction *action);

     void updateCameraState(QCamera::State);
     void updateCaptureMode();
     void updateRecorderState(QMediaRecorder::State state);
     void setExposureCompensation(int index);

     void updateRecordTime();

     void processCapturedImage(int requestId, const QImage &img);
     void updateLockStatus(QCamera::LockStatus, QCamera::LockChangeReason);

     void displayViewfinder();
     void displayCapturedImage();

     void readyForCapture(bool ready);
     void imageSaved(int id, const QString &fileName);

 protected:
     void keyPressEvent(QKeyEvent *event) override;
     void keyReleaseEvent(QKeyEvent *event) override;
     void closeEvent(QCloseEvent *event) override;

 private:
     Ui::Camera *ui;

     QScopedPointer<QCamera> m_camera;
     QScopedPointer<QCameraImageCapture> m_imageCapture;
     QScopedPointer<QMediaRecorder> m_mediaRecorder;

     QImageEncoderSettings m_imageSettings;
     QAudioEncoderSettings m_audioSettings;
     QVideoEncoderSettings m_videoSettings;
     QString m_videoContainerFormat;
     bool m_isCapturingImage = false;
     bool m_applicationExiting = false;
 };

 #endif