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