diff --git a/renderer/renderjob.h b/renderer/renderjob.h
--- a/renderer/renderjob.h
+++ b/renderer/renderjob.h
@@ -34,7 +34,7 @@
 
 public:
     RenderJob(bool erase, bool usekuiserver, int pid, const QString &renderer, const QString &profile, const QString &rendermodule, const QString &player, const QString &scenelist, const QString &dest, const QStringList &preargs, const QStringList &args, int in = -1, int out = -1);
-    ~RenderJob();
+    ~RenderJob() override;
     void setLocale(const QString &locale);
 
 public slots:
diff --git a/src/bin/abstractprojectitem.h b/src/bin/abstractprojectitem.h
--- a/src/bin/abstractprojectitem.h
+++ b/src/bin/abstractprojectitem.h
@@ -68,7 +68,7 @@
      * We try to read the attributes "name" and "description"
      */
     AbstractProjectItem(PROJECTITEMTYPE type, const QDomElement &description, AbstractProjectItem *parent = nullptr);
-    virtual ~AbstractProjectItem();
+    ~AbstractProjectItem() override;
 
     bool operator==(const AbstractProjectItem *projectItem) const;
 
diff --git a/src/bin/bin.h b/src/bin/bin.h
--- a/src/bin/bin.h
+++ b/src/bin/bin.h
@@ -176,7 +176,7 @@
 
 public:
     explicit Bin(QWidget *parent = nullptr);
-    ~Bin();
+    ~Bin() override;
 
     bool isLoading;
 
diff --git a/src/bin/generators/generators.h b/src/bin/generators/generators.h
--- a/src/bin/generators/generators.h
+++ b/src/bin/generators/generators.h
@@ -49,7 +49,7 @@
 
 public:
     explicit Generators(Monitor *monitor, const QString &path, QWidget *parent = nullptr);
-    virtual ~Generators();
+    ~Generators() override;
 
     static void getGenerators(const QStringList &producers, QMenu *menu);
     static QPair <QString, QString> parseGenerator(const QString &path, const QStringList &producers);
diff --git a/src/bin/projectclip.h b/src/bin/projectclip.h
--- a/src/bin/projectclip.h
+++ b/src/bin/projectclip.h
@@ -64,7 +64,7 @@
      * @param description element describing the clip; the "id" attribute and "resource" property are used
      */
     ProjectClip(const QDomElement &description, const QIcon &thumb, ProjectFolder *parent);
-    virtual ~ProjectClip();
+    ~ProjectClip() override;
 
     void reloadProducer(bool refreshOnly = false);
 
diff --git a/src/bin/projectfolder.h b/src/bin/projectfolder.h
--- a/src/bin/projectfolder.h
+++ b/src/bin/projectfolder.h
@@ -48,7 +48,7 @@
     /** @brief Creates an empty root folder. */
     explicit ProjectFolder(Bin *bin);
 
-    ~ProjectFolder();
+    ~ProjectFolder() override;
 
     /**
      * @brief Returns the clip if it is a child (also indirect).
diff --git a/src/bin/projectfolderup.h b/src/bin/projectfolderup.h
--- a/src/bin/projectfolderup.h
+++ b/src/bin/projectfolderup.h
@@ -44,7 +44,7 @@
      */
     explicit ProjectFolderUp(AbstractProjectItem *parent);
 
-    ~ProjectFolderUp();
+    ~ProjectFolderUp() override;
 
     /**
      * @brief Returns the clip if it is a child (also indirect).
diff --git a/src/bin/projectitemmodel.h b/src/bin/projectitemmodel.h
--- a/src/bin/projectitemmodel.h
+++ b/src/bin/projectitemmodel.h
@@ -40,7 +40,7 @@
 
 public:
     explicit ProjectItemModel(Bin *bin);
-    ~ProjectItemModel();
+    ~ProjectItemModel() override;
 
     /** @brief Returns item data depending on role requested */
     QVariant data(const QModelIndex &index, int role) const Q_DECL_OVERRIDE;
diff --git a/src/bin/projectsubclip.h b/src/bin/projectsubclip.h
--- a/src/bin/projectsubclip.h
+++ b/src/bin/projectsubclip.h
@@ -49,7 +49,7 @@
      * @brief Constructor; used when loading a project and the producer is already available.
      */
     ProjectSubClip(ProjectClip *parent, int in, int out, const QString &timecode, const QString &name = QString());
-    virtual ~ProjectSubClip();
+    ~ProjectSubClip() override;
 
     ProjectClip *clip(const QString &id) Q_DECL_OVERRIDE;
     ProjectFolder *folder(const QString &id) Q_DECL_OVERRIDE;
diff --git a/src/capture/managecapturesdialog.h b/src/capture/managecapturesdialog.h
--- a/src/capture/managecapturesdialog.h
+++ b/src/capture/managecapturesdialog.h
@@ -32,7 +32,7 @@
 
 public:
     explicit ManageCapturesDialog(const QList<QUrl> &files, QWidget *parent = nullptr);
-    ~ManageCapturesDialog();
+    ~ManageCapturesDialog() override;
     QList<QUrl> importFiles() const;
 
 private slots:
diff --git a/src/capture/mltdevicecapture.h b/src/capture/mltdevicecapture.h
--- a/src/capture/mltdevicecapture.h
+++ b/src/capture/mltdevicecapture.h
@@ -58,7 +58,7 @@
     explicit MltDeviceCapture(QString profile, /*VideoSurface *surface,*/ QWidget *parent = nullptr);
 
     /** @brief Destroy the MLT Renderer. */
-    ~MltDeviceCapture();
+    ~MltDeviceCapture() override;
 
     int doCapture;
 
diff --git a/src/core.h b/src/core.h
--- a/src/core.h
+++ b/src/core.h
@@ -51,7 +51,7 @@
     Core(Core&&) = delete;
     Core& operator=(Core&&) = delete;
 
-    virtual ~Core();
+    ~Core() override;
 
     /**
      * @brief Constructs the application
diff --git a/src/dialogs/encodingprofilesdialog.h b/src/dialogs/encodingprofilesdialog.h
--- a/src/dialogs/encodingprofilesdialog.h
+++ b/src/dialogs/encodingprofilesdialog.h
@@ -31,7 +31,7 @@
 
 public:
     explicit EncodingProfilesDialog(int profileType, QWidget *parent = nullptr);
-    ~EncodingProfilesDialog();
+    ~EncodingProfilesDialog() override;
 
 private slots:
     void slotLoadProfiles();
diff --git a/src/dialogs/kdenlivesettingsdialog.h b/src/dialogs/kdenlivesettingsdialog.h
--- a/src/dialogs/kdenlivesettingsdialog.h
+++ b/src/dialogs/kdenlivesettingsdialog.h
@@ -41,7 +41,7 @@
 
 public:
     KdenliveSettingsDialog(const QMap<QString, QString> &mappable_actions, bool gpuAllowed, QWidget *parent = nullptr);
-    ~KdenliveSettingsDialog();
+    ~KdenliveSettingsDialog() override;
     void showPage(int page, int option);
     void checkProfile();
 
diff --git a/src/dialogs/renderwidget.h b/src/dialogs/renderwidget.h
--- a/src/dialogs/renderwidget.h
+++ b/src/dialogs/renderwidget.h
@@ -112,7 +112,7 @@
 
 public:
     explicit RenderWidget(const QString &projectfolder, bool enableProxy, const QString &profile, QWidget *parent = nullptr);
-    virtual ~RenderWidget();
+    ~RenderWidget() override;
     void setGuides(const QMap<double, QString> &guidesData, double duration);
     void focusFirstVisibleItem(const QString &profile = QString());
     void setProfile(const QString &profile);
diff --git a/src/doc/documentchecker.h b/src/doc/documentchecker.h
--- a/src/doc/documentchecker.h
+++ b/src/doc/documentchecker.h
@@ -33,7 +33,7 @@
 
 public:
     explicit DocumentChecker(const QUrl &url, const QDomDocument &doc);
-    ~DocumentChecker();
+    ~DocumentChecker() override;
     /**
      * @brief checks for problems with the clips in the project
      * Checks for missing proxies, wrong duration clips, missing fonts, missing images, missing source clips
diff --git a/src/doc/kdenlivedoc.h b/src/doc/kdenlivedoc.h
--- a/src/doc/kdenlivedoc.h
+++ b/src/doc/kdenlivedoc.h
@@ -77,7 +77,7 @@
 public:
 
     KdenliveDoc(const QUrl &url, const QString &projectFolder, QUndoGroup *undoGroup, const QString &profileName, const QMap<QString, QString> &properties, const QMap<QString, QString> &metadata, const QPoint &tracks, Render *render, NotesPlugin *notes, bool *openBackup, MainWindow *parent = nullptr);
-    ~KdenliveDoc();
+    ~KdenliveDoc() override;
     QDomNodeList producersList();
     double fps() const;
     int width() const;
diff --git a/src/dvdwizard/dvdwizard.h b/src/dvdwizard/dvdwizard.h
--- a/src/dvdwizard/dvdwizard.h
+++ b/src/dvdwizard/dvdwizard.h
@@ -38,7 +38,7 @@
     Q_OBJECT
 public:
     explicit DvdWizard(MonitorManager *manager, const QString &url = QString(), QWidget *parent = nullptr);
-    virtual ~DvdWizard();
+    ~DvdWizard() override;
     void processSpumux();
 
 private:
diff --git a/src/dvdwizard/dvdwizardchapters.h b/src/dvdwizard/dvdwizardchapters.h
--- a/src/dvdwizard/dvdwizardchapters.h
+++ b/src/dvdwizard/dvdwizardchapters.h
@@ -33,7 +33,7 @@
 
 public:
     explicit DvdWizardChapters(MonitorManager *manager, DVDFORMAT format, QWidget *parent = nullptr);
-    virtual ~DvdWizardChapters();
+    ~DvdWizardChapters() override;
     void changeProfile(DVDFORMAT format);
     void setPal(bool isPal);
     void setVobFiles(DVDFORMAT format, const QStringList &movies, const QStringList &durations, const QStringList &chapters);
diff --git a/src/dvdwizard/dvdwizardmenu.h b/src/dvdwizard/dvdwizardmenu.h
--- a/src/dvdwizard/dvdwizardmenu.h
+++ b/src/dvdwizard/dvdwizardmenu.h
@@ -88,7 +88,7 @@
 
 public:
     explicit DvdWizardMenu(DVDFORMAT format, QWidget *parent = nullptr);
-    virtual ~DvdWizardMenu();
+    ~DvdWizardMenu() override;
     bool createMenu() const;
     void createBackgroundImage(const QString &img1, bool letterbox);
     void createButtonImages(const QString &selected_image, const QString &highlighted_image, bool letterbox);
diff --git a/src/dvdwizard/dvdwizardvob.h b/src/dvdwizard/dvdwizardvob.h
--- a/src/dvdwizard/dvdwizardvob.h
+++ b/src/dvdwizard/dvdwizardvob.h
@@ -107,7 +107,7 @@
 
 public:
     explicit DvdWizardVob(QWidget *parent = nullptr);
-    virtual ~DvdWizardVob();
+    ~DvdWizardVob() override;
     QStringList selectedUrls() const;
     void setUrl(const QString &url);
     DVDFORMAT dvdFormat() const;
diff --git a/src/effectslist/effectslistwidget.h b/src/effectslist/effectslistwidget.h
--- a/src/effectslist/effectslistwidget.h
+++ b/src/effectslist/effectslistwidget.h
@@ -36,7 +36,7 @@
     static const int IdRole = TypeRole + 1;
 
     explicit EffectsListWidget(QWidget *parent = nullptr);
-    virtual ~EffectsListWidget();
+    ~EffectsListWidget() override;
     const QDomElement currentEffect() const;
     QString currentInfo() const;
     static const QDomElement itemEffect(int type, const QStringList &effectInfo);
diff --git a/src/effectstack/collapsibleeffect.h b/src/effectstack/collapsibleeffect.h
--- a/src/effectstack/collapsibleeffect.h
+++ b/src/effectstack/collapsibleeffect.h
@@ -43,7 +43,7 @@
 
 public:
     explicit CollapsibleEffect(const QDomElement &effect, const QDomElement &original_effect, const ItemInfo &info, EffectMetaInfo *metaInfo, bool canMoveUp, bool lastEffect, QWidget *parent = nullptr);
-    ~CollapsibleEffect();
+    ~CollapsibleEffect() override;
     QLabel *title;
 
     void setupWidget(const ItemInfo &info, EffectMetaInfo *metaInfo);
diff --git a/src/effectstack/collapsiblegroup.h b/src/effectstack/collapsiblegroup.h
--- a/src/effectstack/collapsiblegroup.h
+++ b/src/effectstack/collapsiblegroup.h
@@ -51,7 +51,7 @@
 
 public:
     CollapsibleGroup(int ix, bool firstGroup, bool lastGroup, const EffectInfo &info, QWidget *parent = nullptr);
-    ~CollapsibleGroup();
+    ~CollapsibleGroup() override;
     void updateTimecodeFormat();
     void setActive(bool activate) Q_DECL_OVERRIDE;
     int groupIndex() const;
diff --git a/src/effectstack/dragvalue.h b/src/effectstack/dragvalue.h
--- a/src/effectstack/dragvalue.h
+++ b/src/effectstack/dragvalue.h
@@ -84,7 +84,7 @@
     * @param showSlider If disabled, user can still drag on the label but no progress bar is shown
     */
     explicit DragValue(const QString &label, double defaultValue, int decimals, double min = 0, double max = 100, int id = -1, const QString &suffix = QString(), bool showSlider = true, QWidget *parent = nullptr);
-    virtual ~DragValue();
+    ~DragValue() override;
 
     /** @brief Returns the precision = number of decimals */
     int precision() const;
diff --git a/src/effectstack/effectstackedit.h b/src/effectstack/effectstackedit.h
--- a/src/effectstack/effectstackedit.h
+++ b/src/effectstack/effectstackedit.h
@@ -35,7 +35,7 @@
     Q_OBJECT
 public:
     explicit EffectStackEdit(Monitor *monitor, QWidget *parent = nullptr);
-    ~EffectStackEdit();
+    ~EffectStackEdit() override;
     static QMap<QString, QImage> iconCache;
     /** @brief Sets attribute @param name to @param value.
     *
diff --git a/src/effectstack/effectstackview2.h b/src/effectstack/effectstackview2.h
--- a/src/effectstack/effectstackview2.h
+++ b/src/effectstack/effectstackview2.h
@@ -43,7 +43,7 @@
 
 public:
     explicit EffectStackView2(Monitor *projectMonitor, QWidget *parent = nullptr);
-    virtual ~EffectStackView2();
+    ~EffectStackView2() override;
 
     /** @brief Raises @param dock if a clip is loaded. */
     void raiseWindow(QWidget *dock);
diff --git a/src/effectstack/parametercontainer.h b/src/effectstack/parametercontainer.h
--- a/src/effectstack/parametercontainer.h
+++ b/src/effectstack/parametercontainer.h
@@ -79,7 +79,7 @@
 
 public:
     explicit ParameterContainer(const QDomElement &effect, const ItemInfo &info, EffectMetaInfo *metaInfo, QWidget *parent = nullptr);
-    ~ParameterContainer();
+    ~ParameterContainer() override;
     void updateTimecodeFormat();
     void updateParameter(const QString &key, const QString &value);
     /** @brief Returns true of this effect requires an on monitor adjustable effect scene. */
diff --git a/src/effectstack/widgets/abstractparamwidget.h b/src/effectstack/widgets/abstractparamwidget.h
--- a/src/effectstack/widgets/abstractparamwidget.h
+++ b/src/effectstack/widgets/abstractparamwidget.h
@@ -37,7 +37,7 @@
 public:
     AbstractParamWidget() = delete;
     AbstractParamWidget(QWidget* w):QWidget(w){}
-    virtual ~AbstractParamWidget(){};
+    ~AbstractParamWidget() override{};
 
     /** @brief Factory method to construct a parameter widget given its xml representation
         @param content XML representation of the widget
diff --git a/src/effectstack/widgets/animationwidget.h b/src/effectstack/widgets/animationwidget.h
--- a/src/effectstack/widgets/animationwidget.h
+++ b/src/effectstack/widgets/animationwidget.h
@@ -44,7 +44,7 @@
     Q_OBJECT
 public:
     explicit AnimationWidget(EffectMetaInfo *info, int clipPos, int min, int max, int effectIn, const QString &effectId, const QDomElement &xml, QWidget *parent = nullptr);
-    virtual ~AnimationWidget();
+    ~AnimationWidget() override;
     void updateTimecodeFormat();
     void addParameter(const QDomElement &e);
     const QMap<QString, QString> getAnimation();
diff --git a/src/effectstack/widgets/boolparamwidget.h b/src/effectstack/widgets/boolparamwidget.h
--- a/src/effectstack/widgets/boolparamwidget.h
+++ b/src/effectstack/widgets/boolparamwidget.h
@@ -50,7 +50,7 @@
 
 public slots:
     /** @brief Toggle the comments on or off    */
-    void slotShowComment(bool);
+    void slotShowComment(bool) override;
 };
 
 
diff --git a/src/effectstack/widgets/colorpickerwidget.h b/src/effectstack/widgets/colorpickerwidget.h
--- a/src/effectstack/widgets/colorpickerwidget.h
+++ b/src/effectstack/widgets/colorpickerwidget.h
@@ -57,7 +57,7 @@
     /** @brief Sets up the widget. */
     explicit ColorPickerWidget(QWidget *parent = nullptr);
     /** @brief Makes sure the event filter is removed. */
-    virtual ~ColorPickerWidget();
+    ~ColorPickerWidget() override;
 
 protected:
     void mousePressEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
diff --git a/src/effectstack/widgets/cornerswidget.h b/src/effectstack/widgets/cornerswidget.h
--- a/src/effectstack/widgets/cornerswidget.h
+++ b/src/effectstack/widgets/cornerswidget.h
@@ -36,7 +36,7 @@
      * @param factor Factor by which the parameters differ from the range 0-1
      * @param parent (optional) Parent widget */
     explicit CornersWidget(Monitor *monitor, const QDomElement &e, int minFrame, int maxFrame, int pos, const Timecode &tc, int activeKeyframe, QWidget *parent = nullptr);
-    virtual ~CornersWidget();
+    ~CornersWidget() override;
 
     void addParameter(const QDomElement &e, int activeKeyframe = -1) Q_DECL_OVERRIDE;
 
diff --git a/src/effectstack/widgets/curves/abstractcurvewidget.h b/src/effectstack/widgets/curves/abstractcurvewidget.h
--- a/src/effectstack/widgets/curves/abstractcurvewidget.h
+++ b/src/effectstack/widgets/curves/abstractcurvewidget.h
@@ -74,7 +74,7 @@
 {
 public:
     typedef typename Curve_t::Point_t Point_t;
-    virtual ~AbstractCurveWidget(){};
+    ~AbstractCurveWidget() override{};
 
     /** @param parent Optional parent of the widget
     */
@@ -106,7 +106,7 @@
 
     /** @brief Resets the curve to an empty one
      */
-    void reset();
+    void reset() override;
 
     /** @brief Returns a string corresponding to the curve
      */
@@ -125,9 +125,9 @@
 public:
     /** @brief Delete current spline point if it is not a extremal point (first or last)
      */
-    void slotDeleteCurrentPoint();
-    void slotZoomIn();
-    void slotZoomOut();
+    void slotDeleteCurrentPoint() override;
+    void slotZoomIn() override;
+    void slotZoomOut() override;
 protected:
     void paintBackground(QPainter * p);
     int heightForWidth(int w) const Q_DECL_OVERRIDE;
diff --git a/src/effectstack/widgets/curves/bezier/beziersplineeditor.h b/src/effectstack/widgets/curves/bezier/beziersplineeditor.h
--- a/src/effectstack/widgets/curves/bezier/beziersplineeditor.h
+++ b/src/effectstack/widgets/curves/bezier/beziersplineeditor.h
@@ -33,7 +33,7 @@
 public:
     typedef BPoint Point_t;
     explicit BezierSplineEditor(QWidget *parent = nullptr);
-    ~BezierSplineEditor();
+    ~BezierSplineEditor() override;
 
 
     /** @brief Sets the property showAllHandles to @param show.
diff --git a/src/effectstack/widgets/curves/cubic/kis_curve_widget.h b/src/effectstack/widgets/curves/cubic/kis_curve_widget.h
--- a/src/effectstack/widgets/curves/cubic/kis_curve_widget.h
+++ b/src/effectstack/widgets/curves/cubic/kis_curve_widget.h
@@ -60,7 +60,7 @@
      */
     explicit KisCurveWidget(QWidget *parent = nullptr);
 
-    virtual ~KisCurveWidget();
+    ~KisCurveWidget() override;
 
 
 
diff --git a/src/effectstack/widgets/curves/curveparamwidget.h b/src/effectstack/widgets/curves/curveparamwidget.h
--- a/src/effectstack/widgets/curves/curveparamwidget.h
+++ b/src/effectstack/widgets/curves/curveparamwidget.h
@@ -39,7 +39,7 @@
 class CurveParamWidget : public AbstractParamWidget
 {
 public:
-    virtual ~CurveParamWidget(){};
+    ~CurveParamWidget() override{};
     CurveParamWidget(const QString &spline, QWidget *parent);
 
     enum class CurveModes { Red = 0,
@@ -88,7 +88,7 @@
 public:
     /** @brief Toggle the comments on or off
      */
-    void slotShowComment(bool);
+    void slotShowComment(bool) override;
 private:
     Ui::BezierSpline_UI m_ui;
     DragValue *m_pX;
diff --git a/src/effectstack/widgets/doubleparameterwidget.h b/src/effectstack/widgets/doubleparameterwidget.h
--- a/src/effectstack/widgets/doubleparameterwidget.h
+++ b/src/effectstack/widgets/doubleparameterwidget.h
@@ -53,7 +53,7 @@
                                    const QString &suffix = QString(),
                                    int decimals = 0, bool showRadiobutton = false,
                                    QWidget *parent = nullptr);
-    ~DoubleParameterWidget();
+    ~DoubleParameterWidget() override;
 
     /** @brief The factor by which real param value is multiplicated to give the slider value. */
     double factor;
diff --git a/src/effectstack/widgets/draggablelabel.h b/src/effectstack/widgets/draggablelabel.h
--- a/src/effectstack/widgets/draggablelabel.h
+++ b/src/effectstack/widgets/draggablelabel.h
@@ -33,9 +33,9 @@
 public:
     explicit DraggableLabel(const QString &text, QWidget *parent = nullptr);
 protected:
-    void mousePressEvent(QMouseEvent *ev);
-    void mouseReleaseEvent(QMouseEvent *ev);
-    void mouseMoveEvent(QMouseEvent *ev);
+    void mousePressEvent(QMouseEvent *ev) override;
+    void mouseReleaseEvent(QMouseEvent *ev) override;
+    void mouseMoveEvent(QMouseEvent *ev) override;
 signals:
     void startDrag(const QString &);
 private:
diff --git a/src/effectstack/widgets/geometrywidget.h b/src/effectstack/widgets/geometrywidget.h
--- a/src/effectstack/widgets/geometrywidget.h
+++ b/src/effectstack/widgets/geometrywidget.h
@@ -45,7 +45,7 @@
     * @param clipPos Position of the clip in timeline
     * @param parent (optional) Parent widget */
     explicit GeometryWidget(EffectMetaInfo *info, int clipPos, bool showRotation, bool useOffset, QWidget *parent = nullptr);
-    virtual ~GeometryWidget();
+    ~GeometryWidget() override;
     /** @brief Gets the geometry as a serialized string. */
     QString getValue() const;
     QString getExtraValue(const QString &name) const;
diff --git a/src/effectstack/widgets/keyframeedit.h b/src/effectstack/widgets/keyframeedit.h
--- a/src/effectstack/widgets/keyframeedit.h
+++ b/src/effectstack/widgets/keyframeedit.h
@@ -87,7 +87,7 @@
     Q_OBJECT
 public:
     explicit KeyframeEdit(const QDomElement &e, int minFrame, int maxFrame, const Timecode &tc, int activeKeyframe, QWidget *parent = nullptr);
-    virtual ~KeyframeEdit();
+    ~KeyframeEdit() override;
     virtual void addParameter(const QDomElement &e, int activeKeyframe = -1);
     const QString getValue(const QString &name);
     /** @brief Updates the timecode display according to settings (frame number or hh:mm:ss:ff) */
diff --git a/src/effectstack/widgets/keyframeimport.h b/src/effectstack/widgets/keyframeimport.h
--- a/src/effectstack/widgets/keyframeimport.h
+++ b/src/effectstack/widgets/keyframeimport.h
@@ -38,7 +38,7 @@
     Q_OBJECT
 public:
     explicit KeyframeImport(const ItemInfo &srcInfo, const ItemInfo &dstInfo, const QMap<QString, QString> &data, const Timecode &tc, const QDomElement &xml, const ProfileInfo &profile, QWidget *parent = nullptr);
-    virtual ~KeyframeImport();
+    ~KeyframeImport() override;
     QString selectedData() const;
     QString selectedTarget() const;
 
diff --git a/src/effectstack/widgets/listparamwidget.h b/src/effectstack/widgets/listparamwidget.h
--- a/src/effectstack/widgets/listparamwidget.h
+++ b/src/effectstack/widgets/listparamwidget.h
@@ -76,7 +76,7 @@
 
 public slots:
     /** @brief Toggle the comments on or off    */
-    void slotShowComment(bool);
+    void slotShowComment(bool) override;
 };
 
 
diff --git a/src/effectstack/widgets/positionwidget.h b/src/effectstack/widgets/positionwidget.h
--- a/src/effectstack/widgets/positionwidget.h
+++ b/src/effectstack/widgets/positionwidget.h
@@ -42,7 +42,7 @@
     explicit PositionWidget(const QString &name, int pos, int min, int max,
                           const Timecode &tc, const QString &comment = QString(),
                           QWidget *parent = nullptr);
-    ~PositionWidget();
+    ~PositionWidget() override;
     /** @brief get current position
      */
     int getPosition() const;
diff --git a/src/effectstack/widgets/selectivecolor.h b/src/effectstack/widgets/selectivecolor.h
--- a/src/effectstack/widgets/selectivecolor.h
+++ b/src/effectstack/widgets/selectivecolor.h
@@ -43,7 +43,7 @@
     * @param color (optional) initial color
     * @param alphaEnabled (optional) Should transparent colors be enabled */
     explicit SelectiveColor(const QDomElement &effect, QWidget *parent = nullptr);
-    ~SelectiveColor();
+    ~SelectiveColor() override;
     void addParam(QDomElement &effect, QString name);
     void updateEffect(QDomElement &effect);
 
diff --git a/src/jogshuttle/jogaction.h b/src/jogshuttle/jogaction.h
--- a/src/jogshuttle/jogaction.h
+++ b/src/jogshuttle/jogaction.h
@@ -28,7 +28,7 @@
 {
 Q_OBJECT public:
     explicit JogShuttleAction(const JogShuttle *jogShuttle, const QStringList &actionMap, QObject *parent = nullptr);
-    ~JogShuttleAction();
+    ~JogShuttleAction() override;
 
 private:
     const JogShuttle *m_jogShuttle;
diff --git a/src/jogshuttle/jogshuttle.h b/src/jogshuttle/jogshuttle.h
--- a/src/jogshuttle/jogshuttle.h
+++ b/src/jogshuttle/jogshuttle.h
@@ -55,7 +55,7 @@
 
 public:
     ShuttleThread(const QString &device, QObject *parent);
-    ~ShuttleThread();
+    ~ShuttleThread() override;
     void run() Q_DECL_OVERRIDE;
     QString device();
     void stop();
@@ -83,7 +83,7 @@
     Q_OBJECT
 public:
     explicit JogShuttle(const QString &device, QObject *parent = nullptr);
-    ~JogShuttle();
+    ~JogShuttle() override;
     void stopDevice();
     void initDevice(const QString &device);
     static QString canonicalDevice(const QString &device);
diff --git a/src/lib/audio/audioCorrelation.h b/src/lib/audio/audioCorrelation.h
--- a/src/lib/audio/audioCorrelation.h
+++ b/src/lib/audio/audioCorrelation.h
@@ -29,7 +29,7 @@
 public:
     /// AudioCorrelation will take ownership of mainTrackEnvelope
     explicit AudioCorrelation(AudioEnvelope *mainTrackEnvelope);
-    ~AudioCorrelation();
+    ~AudioCorrelation() override;
 
     /**
       This object will take ownership of the passed envelope.
diff --git a/src/lib/audio/audioEnvelope.h b/src/lib/audio/audioEnvelope.h
--- a/src/lib/audio/audioEnvelope.h
+++ b/src/lib/audio/audioEnvelope.h
@@ -32,7 +32,7 @@
 
 public:
     explicit AudioEnvelope(const QString &url, Mlt::Producer *producer, int offset = 0, int length = 0, int track = 0, int startPos = 0);
-    virtual ~AudioEnvelope();
+    ~AudioEnvelope() override;
 
     /// Returns the envelope, calculates it if necessary.
     qint64 const *envelope();
diff --git a/src/mainwindow.h b/src/mainwindow.h
--- a/src/mainwindow.h
+++ b/src/mainwindow.h
@@ -74,7 +74,7 @@
      * set, latest project will be opened. If no file is open after trying this,
      * a default new file will be created. */
     void init(const QString &MltPath, const QUrl &Url, const QString &clipsToLoad);
-    virtual ~MainWindow();
+    ~MainWindow() override;
 
     static EffectsList videoEffects;
     static EffectsList audioEffects;
diff --git a/src/mltcontroller/bincontroller.h b/src/mltcontroller/bincontroller.h
--- a/src/mltcontroller/bincontroller.h
+++ b/src/mltcontroller/bincontroller.h
@@ -49,7 +49,7 @@
 
 public:
     explicit BinController(const QString &profileName = QString());
-    virtual ~BinController();
+    ~BinController() override;
 
     /** @brief Returns the MLT profile used everywhere in the project. */
     Mlt::Profile *profile();
diff --git a/src/mltcontroller/clipcontroller.h b/src/mltcontroller/clipcontroller.h
--- a/src/mltcontroller/clipcontroller.h
+++ b/src/mltcontroller/clipcontroller.h
@@ -58,7 +58,7 @@
      * @param bincontroller reference to the bincontroller
      */
     explicit ClipController(BinController *bincontroller);
-    virtual ~ClipController();
+    ~ClipController() override;
 
     /** @brief Returns true if the master producer is valid */
     bool isValid();
diff --git a/src/mltcontroller/clippropertiescontroller.h b/src/mltcontroller/clippropertiescontroller.h
--- a/src/mltcontroller/clippropertiescontroller.h
+++ b/src/mltcontroller/clippropertiescontroller.h
@@ -58,7 +58,7 @@
      * @param parent The widget where our infos will be displayed
      */
     explicit ClipPropertiesController(const Timecode &tc, ClipController *controller, QWidget *parent);
-    virtual ~ClipPropertiesController();
+    ~ClipPropertiesController() override;
 
 public slots:
     void slotReloadProperties();
diff --git a/src/mltcontroller/producerqueue.h b/src/mltcontroller/producerqueue.h
--- a/src/mltcontroller/producerqueue.h
+++ b/src/mltcontroller/producerqueue.h
@@ -48,7 +48,7 @@
 
 public:
     explicit ProducerQueue(BinController *controller);
-    ~ProducerQueue();
+    ~ProducerQueue() override;
 
     /** @brief Force processing of clip with selected id. */
     void forceProcessing(const QString &id);
diff --git a/src/monitor/abstractmonitor.h b/src/monitor/abstractmonitor.h
--- a/src/monitor/abstractmonitor.h
+++ b/src/monitor/abstractmonitor.h
@@ -47,7 +47,7 @@
     }
 
     /** @brief Destroy the MLT Renderer. */
-    virtual ~AbstractRender() {}
+    ~AbstractRender() override {}
 
     /** @brief This property is used to decide if the renderer should convert it's frames to QImage for use in other Kdenlive widgets. */
     bool sendFrameForAnalysis;
@@ -85,7 +85,7 @@
     {
         return m_id;
     }
-    virtual ~AbstractMonitor();
+    ~AbstractMonitor() override;
     virtual AbstractRender *abstractRender() = 0;
     bool isActive() const;
     virtual void mute(bool mute, bool updateIconOnly = false) = 0;
diff --git a/src/monitor/glwidget.h b/src/monitor/glwidget.h
--- a/src/monitor/glwidget.h
+++ b/src/monitor/glwidget.h
@@ -56,7 +56,7 @@
 
 public:
     GLWidget(int id, QObject *parent = nullptr);
-    ~GLWidget();
+    ~GLWidget() override;
 
     void createThread(RenderThread **thread, thread_function_t function, void *data);
     void startGlsl();
@@ -215,7 +215,7 @@
     Q_OBJECT
 public:
     RenderThread(thread_function_t function, void *data, QOpenGLContext *context, QSurface *surface);
-    ~RenderThread();
+    ~RenderThread() override;
 
 protected:
     void run() Q_DECL_OVERRIDE;
@@ -232,7 +232,7 @@
     Q_OBJECT
 public:
     explicit FrameRenderer(QOpenGLContext *shareContext, QSurface *surface);
-    ~FrameRenderer();
+    ~FrameRenderer() override;
     QSemaphore *semaphore()
     {
         return &m_semaphore;
diff --git a/src/monitor/monitor.h b/src/monitor/monitor.h
--- a/src/monitor/monitor.h
+++ b/src/monitor/monitor.h
@@ -82,7 +82,7 @@
 
 public:
     Monitor(Kdenlive::MonitorId id, MonitorManager *manager, QWidget *parent = nullptr);
-    ~Monitor();
+    ~Monitor() override;
     Render *render;
     AbstractRender *abstractRender() Q_DECL_OVERRIDE;
     void resetProfile(const MltVideoProfile &profile);
diff --git a/src/monitor/recmanager.h b/src/monitor/recmanager.h
--- a/src/monitor/recmanager.h
+++ b/src/monitor/recmanager.h
@@ -58,7 +58,7 @@
 
 public:
     explicit RecManager(Monitor *parent = nullptr);
-    ~RecManager();
+    ~RecManager() override;
     QToolBar *toolbar() const;
     void stopCapture();
     QAction *switchAction() const;
diff --git a/src/monitor/recmonitor.h b/src/monitor/recmonitor.h
--- a/src/monitor/recmonitor.h
+++ b/src/monitor/recmonitor.h
@@ -54,7 +54,7 @@
 
 public:
     explicit RecMonitor(Kdenlive::MonitorId name, MonitorManager *manager, QWidget *parent = nullptr);
-    ~RecMonitor();
+    ~RecMonitor() override;
 
     AbstractRender *abstractRender() Q_DECL_OVERRIDE;
     void analyseFrames(bool analyze);
diff --git a/src/monitor/scopes/audiographspectrum.h b/src/monitor/scopes/audiographspectrum.h
--- a/src/monitor/scopes/audiographspectrum.h
+++ b/src/monitor/scopes/audiographspectrum.h
@@ -80,7 +80,7 @@
     Q_OBJECT
 public:
     AudioGraphSpectrum(MonitorManager *manager, QWidget *parent = nullptr);
-    virtual ~AudioGraphSpectrum();
+    ~AudioGraphSpectrum() override;
 
 private:
     MonitorManager *m_manager;
diff --git a/src/monitor/scopes/monitoraudiolevel.h b/src/monitor/scopes/monitoraudiolevel.h
--- a/src/monitor/scopes/monitoraudiolevel.h
+++ b/src/monitor/scopes/monitoraudiolevel.h
@@ -36,7 +36,7 @@
     Q_OBJECT
 public:
     explicit MonitorAudioLevel(Mlt::Profile *profile, int height, QWidget *parent = nullptr);
-    virtual ~MonitorAudioLevel();
+    ~MonitorAudioLevel() override;
     void refreshPixmap();
     int audioChannels;
     bool isValid;
diff --git a/src/monitor/scopes/scopewidget.h b/src/monitor/scopes/scopewidget.h
--- a/src/monitor/scopes/scopewidget.h
+++ b/src/monitor/scopes/scopewidget.h
@@ -67,7 +67,7 @@
     explicit ScopeWidget(QWidget *parent = nullptr);
 
     //! Destructs a ScopeWidget.
-    virtual ~ScopeWidget();
+    ~ScopeWidget() override;
 
     /*!
       Returns the title of the scope to be displayed by the application.
diff --git a/src/onmonitoritems/rotoscoping/rotowidget.h b/src/onmonitoritems/rotoscoping/rotowidget.h
--- a/src/onmonitoritems/rotoscoping/rotowidget.h
+++ b/src/onmonitoritems/rotoscoping/rotowidget.h
@@ -42,7 +42,7 @@
 
 public:
     RotoWidget(const QByteArray &data, Monitor *monitor, const ItemInfo &info, const Timecode &t, QWidget *parent = nullptr);
-    ~RotoWidget();
+    ~RotoWidget() override;
 
     /** @brief Returns the spline(s) in the JSON format used by filter_rotoscoping (MLT). */
     QByteArray getSpline();
diff --git a/src/profiles/tree/profiletreemodel.hpp b/src/profiles/tree/profiletreemodel.hpp
--- a/src/profiles/tree/profiletreemodel.hpp
+++ b/src/profiles/tree/profiletreemodel.hpp
@@ -34,7 +34,7 @@
 
   public:
       explicit ProfileTreeModel(QObject *parent = 0);
-      ~ProfileTreeModel();
+      ~ProfileTreeModel() override;
 
       QVariant data(const QModelIndex &index, int role) const override;
       //This is reimplemented to prevent selection of the categories
diff --git a/src/project/clipmanager.h b/src/project/clipmanager.h
--- a/src/project/clipmanager.h
+++ b/src/project/clipmanager.h
@@ -66,7 +66,7 @@
 Q_OBJECT public:
 
     explicit ClipManager(KdenliveDoc *doc);
-    virtual ~ ClipManager();
+    ~ ClipManager() override;
 
     void slotAddTextTemplateClip(const QString &titleName, const QUrl &path, const QString &group, const QString &groupId);
     void doDeleteClips(const QStringList &clipIds, const QStringList &folderIds, const QStringList &subClipIds, QUndoCommand *deleteCommand, bool execute);
diff --git a/src/project/clipstabilize.h b/src/project/clipstabilize.h
--- a/src/project/clipstabilize.h
+++ b/src/project/clipstabilize.h
@@ -31,7 +31,7 @@
 
 public:
     explicit ClipStabilize(const QStringList &urls, const QString &filterName, int out, QWidget *parent = nullptr);
-    ~ClipStabilize();
+    ~ClipStabilize() override;
     /** @brief Should the generated clip be added to current project. */
     bool autoAddClip() const;
     /** @brief Return the producer parameters, producer name as value of "producer" entry. */
diff --git a/src/project/cliptranscode.h b/src/project/cliptranscode.h
--- a/src/project/cliptranscode.h
+++ b/src/project/cliptranscode.h
@@ -33,7 +33,7 @@
 
 public:
     ClipTranscode(const QStringList &urls, const QString &params, const QStringList &postParams, const QString &description, const QStringList &folderInfo = QStringList(), bool automaticMode = false, QWidget *parent = nullptr);
-    ~ClipTranscode();
+    ~ClipTranscode() override;
 
 public slots:
     void slotStartTransCode();
diff --git a/src/project/dialogs/archivewidget.h b/src/project/dialogs/archivewidget.h
--- a/src/project/dialogs/archivewidget.h
+++ b/src/project/dialogs/archivewidget.h
@@ -51,7 +51,7 @@
     ArchiveWidget(const QString &projectName, const QDomDocument &doc, const QList<ClipController *> &list, const QStringList &luma_list, QWidget *parent = nullptr);
     // Constructor for extracting widget
     explicit ArchiveWidget(const QUrl &url, QWidget *parent = nullptr);
-    ~ArchiveWidget();
+    ~ArchiveWidget() override;
 
     QString extractedProjectFile() const;
 
diff --git a/src/project/dialogs/backupwidget.h b/src/project/dialogs/backupwidget.h
--- a/src/project/dialogs/backupwidget.h
+++ b/src/project/dialogs/backupwidget.h
@@ -37,7 +37,7 @@
 public:
     BackupWidget(const QUrl &projectUrl, const QUrl &projectFolder, const QString &projectId, QWidget *parent = nullptr);
     // Constructor for extracting widget
-    ~BackupWidget();
+    ~BackupWidget() override;
     /** @brief Return the path for selected backup file. */
     QString selectedFile() const;
 
diff --git a/src/project/dialogs/noteswidget.h b/src/project/dialogs/noteswidget.h
--- a/src/project/dialogs/noteswidget.h
+++ b/src/project/dialogs/noteswidget.h
@@ -33,7 +33,7 @@
     Q_OBJECT
 public:
     explicit NotesWidget(QWidget *parent = nullptr);
-    ~NotesWidget();
+    ~NotesWidget() override;
 
 protected:
     void mouseMoveEvent(QMouseEvent *e) Q_DECL_OVERRIDE;
diff --git a/src/project/dialogs/profilewidget.h b/src/project/dialogs/profilewidget.h
--- a/src/project/dialogs/profilewidget.h
+++ b/src/project/dialogs/profilewidget.h
@@ -44,7 +44,7 @@
     Q_OBJECT
 public:
     explicit ProfileWidget(QWidget *parent = nullptr);
-    ~ProfileWidget();
+    ~ProfileWidget() override;
     void loadProfile(const QString& profile);
     const QString selectedProfile() const;
 
diff --git a/src/project/dialogs/slideshowclip.h b/src/project/dialogs/slideshowclip.h
--- a/src/project/dialogs/slideshowclip.h
+++ b/src/project/dialogs/slideshowclip.h
@@ -34,7 +34,7 @@
 
 public:
     explicit SlideshowClip(const Timecode &tc, QString clipFolder, ProjectClip *clip = nullptr, QWidget *parent = nullptr);
-    virtual ~ SlideshowClip();
+    ~ SlideshowClip() override;
     /** return selected path for slideshow in MLT format */
     QString selectedPath();
     QString clipName() const;
diff --git a/src/project/invaliddialog.h b/src/project/invaliddialog.h
--- a/src/project/invaliddialog.h
+++ b/src/project/invaliddialog.h
@@ -31,7 +31,7 @@
 
 public:
     explicit InvalidDialog(const QString &caption, const QString &message, bool infoOnly, QWidget *parent = nullptr);
-    ~InvalidDialog();
+    ~InvalidDialog() override;
 
     void addClip(const QString &id, const QString &path);
     QStringList getIds() const;
diff --git a/src/project/jobs/abstractclipjob.h b/src/project/jobs/abstractclipjob.h
--- a/src/project/jobs/abstractclipjob.h
+++ b/src/project/jobs/abstractclipjob.h
@@ -48,7 +48,7 @@
         ANALYSECLIPJOB = 6
     };
     AbstractClipJob(JOBTYPE type, ClipType cType, const QString &id, QObject *parent = nullptr);
-    virtual ~ AbstractClipJob();
+    ~ AbstractClipJob() override;
     ClipType clipType;
     JOBTYPE jobType;
     QString description;
diff --git a/src/project/jobs/cutclipjob.h b/src/project/jobs/cutclipjob.h
--- a/src/project/jobs/cutclipjob.h
+++ b/src/project/jobs/cutclipjob.h
@@ -42,7 +42,7 @@
      *  @param parameters StringList that should contain: destination file << source file << in point (optional) << out point (optional)
      * */
     CutClipJob(ClipType cType, const QString &id, const QStringList &parameters);
-    virtual ~ CutClipJob();
+    ~ CutClipJob() override;
     const QString destination() const Q_DECL_OVERRIDE;
     void startJob() Q_DECL_OVERRIDE;
     stringMap cancelProperties() Q_DECL_OVERRIDE;
diff --git a/src/project/jobs/jobmanager.h b/src/project/jobs/jobmanager.h
--- a/src/project/jobs/jobmanager.h
+++ b/src/project/jobs/jobmanager.h
@@ -45,7 +45,7 @@
 
 public:
     explicit JobManager(Bin *bin);
-    virtual ~JobManager();
+    ~JobManager() override;
 
     /** @brief Discard specific job type for a clip.
      *  @param id the clip id
diff --git a/src/project/jobs/meltjob.h b/src/project/jobs/meltjob.h
--- a/src/project/jobs/meltjob.h
+++ b/src/project/jobs/meltjob.h
@@ -54,7 +54,7 @@
         @param extraParams these parameters can be used to further affect the Job handling.
      */
     MeltJob(ClipType cType, const QString &id,  const QMap<QString, QString> &producerParams, const QMap<QString, QString> &filterParams, const QMap<QString, QString> &consumerParams, const stringMap &extraParams = stringMap());
-    virtual ~ MeltJob();
+    ~ MeltJob() override;
     /** @brief Returns the file path that will be written by this Mlt job. Empty when no file is written. */
     const QString destination() const Q_DECL_OVERRIDE;
     /** @brief Start processing the job. */
diff --git a/src/project/jobs/proxyclipjob.h b/src/project/jobs/proxyclipjob.h
--- a/src/project/jobs/proxyclipjob.h
+++ b/src/project/jobs/proxyclipjob.h
@@ -33,7 +33,7 @@
 
 public:
     ProxyJob(ClipType cType, const QString &id, const QStringList &parameters, QTemporaryFile *playlist);
-    virtual ~ ProxyJob();
+    ~ ProxyJob() override;
     const QString destination() const Q_DECL_OVERRIDE;
     void startJob() Q_DECL_OVERRIDE;
     stringMap cancelProperties() Q_DECL_OVERRIDE;
diff --git a/src/project/notesplugin.h b/src/project/notesplugin.h
--- a/src/project/notesplugin.h
+++ b/src/project/notesplugin.h
@@ -33,7 +33,7 @@
     explicit NotesPlugin(ProjectManager *projectManager);
     NotesWidget *widget();
     void clear();
-    ~NotesPlugin();
+    ~NotesPlugin() override;
 
 private slots:
     void setProject(KdenliveDoc *document);
diff --git a/src/project/projectmanager.h b/src/project/projectmanager.h
--- a/src/project/projectmanager.h
+++ b/src/project/projectmanager.h
@@ -42,7 +42,7 @@
 public:
     /** @brief Sets up actions to interact for project interaction (undo, redo, open, save, ...) and creates an empty project. */
     explicit ProjectManager(QObject *parent = nullptr);
-    virtual ~ProjectManager();
+    ~ProjectManager() override;
 
     /** @brief Returns a pointer to the currently opened project. A project should always be open. */
     KdenliveDoc *current();
diff --git a/src/qt-oauth-lib/logindialog.h b/src/qt-oauth-lib/logindialog.h
--- a/src/qt-oauth-lib/logindialog.h
+++ b/src/qt-oauth-lib/logindialog.h
@@ -59,7 +59,7 @@
 
 public:
     explicit LoginDialog(QWidget *parent = nullptr);
-    ~LoginDialog();
+    ~LoginDialog() override;
     void setLoginUrl(const QUrl &url);
 
     QString authCode() const;
diff --git a/src/renderer.h b/src/renderer.h
--- a/src/renderer.h
+++ b/src/renderer.h
@@ -103,7 +103,7 @@
     Render(Kdenlive::MonitorId rendererName, BinController *binController, GLWidget *qmlView, QWidget *parent = nullptr);
 
     /** @brief Destroy the MLT Renderer. */
-    virtual ~Render();
+    ~Render() override;
     /** @brief In some trim modes, arrow keys move the trim pos but not timeline cursor.
      *  if byPassSeek is true, we don't seek renderer but emit a signal for timeline. */
     bool byPassSeek;
diff --git a/src/scopes/abstractscopewidget.h b/src/scopes/abstractscopewidget.h
--- a/src/scopes/abstractscopewidget.h
+++ b/src/scopes/abstractscopewidget.h
@@ -66,7 +66,7 @@
       \see signalMousePositionChanged(): Emitted when mouse tracking is enabled
       */
     explicit AbstractScopeWidget(bool trackMouse = false, QWidget *parent = nullptr);
-    virtual ~AbstractScopeWidget(); // Must be virtual because of inheritance, to avoid memory leaks
+    ~AbstractScopeWidget() override; // Must be virtual because of inheritance, to avoid memory leaks
 
     enum RescaleDirection { North, Northeast, East, Southeast };
 
diff --git a/src/scopes/audioscopes/abstractaudioscopewidget.h b/src/scopes/audioscopes/abstractaudioscopewidget.h
--- a/src/scopes/audioscopes/abstractaudioscopewidget.h
+++ b/src/scopes/audioscopes/abstractaudioscopewidget.h
@@ -28,7 +28,7 @@
     Q_OBJECT
 public:
     explicit AbstractAudioScopeWidget(bool trackMouse = false, QWidget *parent = nullptr);
-    virtual ~AbstractAudioScopeWidget();
+    ~AbstractAudioScopeWidget() override;
 
 public slots:
     void slotReceiveAudio(const audioShortVector &sampleData, int freq, int num_channels, int num_samples);
diff --git a/src/scopes/audioscopes/audiosignal.h b/src/scopes/audioscopes/audiosignal.h
--- a/src/scopes/audioscopes/audiosignal.h
+++ b/src/scopes/audioscopes/audiosignal.h
@@ -35,7 +35,7 @@
     Q_OBJECT
 public:
     explicit AudioSignal(QWidget *parent = nullptr);
-    ~AudioSignal();
+    ~AudioSignal() override;
     /** @brief Used for checking whether audio data needs to be delivered */
     bool monitoringEnabled() const;
 
diff --git a/src/scopes/audioscopes/audiospectrum.h b/src/scopes/audioscopes/audiospectrum.h
--- a/src/scopes/audioscopes/audiospectrum.h
+++ b/src/scopes/audioscopes/audiospectrum.h
@@ -40,7 +40,7 @@
 
 public:
     explicit AudioSpectrum(QWidget *parent = nullptr);
-    ~AudioSpectrum();
+    ~AudioSpectrum() override;
 
     // Implemented virtual methods
     QString widgetName() const Q_DECL_OVERRIDE;
diff --git a/src/scopes/audioscopes/spectrogram.h b/src/scopes/audioscopes/spectrogram.h
--- a/src/scopes/audioscopes/spectrogram.h
+++ b/src/scopes/audioscopes/spectrogram.h
@@ -36,7 +36,7 @@
 
 public:
     explicit Spectrogram(QWidget *parent = nullptr);
-    ~Spectrogram();
+    ~Spectrogram() override;
 
     QString widgetName() const Q_DECL_OVERRIDE;
 
diff --git a/src/scopes/colorscopes/abstractgfxscopewidget.h b/src/scopes/colorscopes/abstractgfxscopewidget.h
--- a/src/scopes/colorscopes/abstractgfxscopewidget.h
+++ b/src/scopes/colorscopes/abstractgfxscopewidget.h
@@ -26,7 +26,7 @@
 
 public:
     explicit AbstractGfxScopeWidget(bool trackMouse = false, QWidget *parent = nullptr);
-    virtual ~AbstractGfxScopeWidget(); // Must be virtual because of inheritance, to avoid memory leaks
+    ~AbstractGfxScopeWidget() override; // Must be virtual because of inheritance, to avoid memory leaks
 
 protected:
     ///// Variables /////
diff --git a/src/scopes/colorscopes/colorplaneexport.h b/src/scopes/colorscopes/colorplaneexport.h
--- a/src/scopes/colorscopes/colorplaneexport.h
+++ b/src/scopes/colorscopes/colorplaneexport.h
@@ -27,7 +27,7 @@
     Q_OBJECT
 public:
     explicit ColorPlaneExport(QWidget *parent = nullptr);
-    ~ColorPlaneExport();
+    ~ColorPlaneExport() override;
 
     enum COLOR_EXPORT_MODE { CPE_YUV, CPE_YUV_Y, CPE_YUV_MOD, CPE_RGB_CURVE, CPE_YPbPr, CPE_HSV_HUESHIFT, CPE_HSV_SATURATION };
 
diff --git a/src/scopes/colorscopes/histogram.h b/src/scopes/colorscopes/histogram.h
--- a/src/scopes/colorscopes/histogram.h
+++ b/src/scopes/colorscopes/histogram.h
@@ -25,7 +25,7 @@
 
 public:
     explicit Histogram(QWidget *parent = nullptr);
-    ~Histogram();
+    ~Histogram() override;
     QString widgetName() const Q_DECL_OVERRIDE;
 
 protected:
diff --git a/src/scopes/colorscopes/rgbparade.h b/src/scopes/colorscopes/rgbparade.h
--- a/src/scopes/colorscopes/rgbparade.h
+++ b/src/scopes/colorscopes/rgbparade.h
@@ -26,7 +26,7 @@
 {
 public:
     explicit RGBParade(QWidget *parent = nullptr);
-    ~RGBParade();
+    ~RGBParade() override;
     QString widgetName() const Q_DECL_OVERRIDE;
 
 protected:
diff --git a/src/scopes/colorscopes/vectorscope.h b/src/scopes/colorscopes/vectorscope.h
--- a/src/scopes/colorscopes/vectorscope.h
+++ b/src/scopes/colorscopes/vectorscope.h
@@ -32,7 +32,7 @@
 
 public:
     explicit Vectorscope(QWidget *parent = nullptr);
-    ~Vectorscope();
+    ~Vectorscope() override;
 
     QString widgetName() const Q_DECL_OVERRIDE;
 
diff --git a/src/scopes/colorscopes/waveform.h b/src/scopes/colorscopes/waveform.h
--- a/src/scopes/colorscopes/waveform.h
+++ b/src/scopes/colorscopes/waveform.h
@@ -29,7 +29,7 @@
 
 public:
     explicit Waveform(QWidget *parent = nullptr);
-    ~Waveform();
+    ~Waveform() override;
 
     QString widgetName() const Q_DECL_OVERRIDE;
 
diff --git a/src/scopes/colorscopes/waveformgenerator.h b/src/scopes/colorscopes/waveformgenerator.h
--- a/src/scopes/colorscopes/waveformgenerator.h
+++ b/src/scopes/colorscopes/waveformgenerator.h
@@ -24,7 +24,7 @@
     enum Rec { Rec_601, Rec_709 };
 
     WaveformGenerator();
-    ~WaveformGenerator();
+    ~WaveformGenerator() override;
 
     QImage calculateWaveform(const QSize &waveformSize, const QImage &image, WaveformGenerator::PaintMode paintMode,
                              bool drawAxis, const WaveformGenerator::Rec rec, uint accelFactor = 1);
diff --git a/src/simplekeyframes/simplekeyframewidget.h b/src/simplekeyframes/simplekeyframewidget.h
--- a/src/simplekeyframes/simplekeyframewidget.h
+++ b/src/simplekeyframes/simplekeyframewidget.h
@@ -33,7 +33,7 @@
 
 public:
     explicit SimpleKeyframeWidget(const Timecode &t, int duration, QWidget *parent = nullptr);
-    ~SimpleKeyframeWidget();
+    ~SimpleKeyframeWidget() override;
 
     int getPosition() const;
     void setKeyframes(const QList<int> &keyframes);
diff --git a/src/statusbarmessagelabel.h b/src/statusbarmessagelabel.h
--- a/src/statusbarmessagelabel.h
+++ b/src/statusbarmessagelabel.h
@@ -46,7 +46,7 @@
     Q_OBJECT
 public:
     explicit FlashLabel(QWidget *parent = nullptr);
-    ~FlashLabel();
+    ~FlashLabel() override;
     QColor color() const;
     void setColor(const QColor &);
 };
@@ -90,7 +90,7 @@
 
 public:
     explicit StatusBarMessageLabel(QWidget *parent);
-    virtual ~StatusBarMessageLabel();
+    ~StatusBarMessageLabel() override;
     void updatePalette();
 
 protected:
diff --git a/src/stopmotion/stopmotion.h b/src/stopmotion/stopmotion.h
--- a/src/stopmotion/stopmotion.h
+++ b/src/stopmotion/stopmotion.h
@@ -60,7 +60,7 @@
     Q_OBJECT
 public:
     StopmotionMonitor(MonitorManager *manager, QWidget *parent);
-    ~StopmotionMonitor();
+    ~StopmotionMonitor() override;
     AbstractRender *abstractRender() Q_DECL_OVERRIDE;
     Kdenlive::MonitorId id() const;
     void setRender(MltDeviceCapture *render);
@@ -91,7 +91,7 @@
      * @param actions The actions for this widget that can have a keyboard shortcut.
      * @param parent (optional) parent widget */
     StopmotionWidget(MonitorManager *manager, const QUrl &projectFolder, const QList< QAction * > &actions, QWidget *parent = nullptr);
-    virtual ~StopmotionWidget();
+    ~StopmotionWidget() override;
 
 protected:
     void closeEvent(QCloseEvent *e) Q_DECL_OVERRIDE;
diff --git a/src/timeline/abstractclipitem.h b/src/timeline/abstractclipitem.h
--- a/src/timeline/abstractclipitem.h
+++ b/src/timeline/abstractclipitem.h
@@ -44,7 +44,7 @@
 public:
 
     AbstractClipItem(const ItemInfo &info, const QRectF &rect, double fps);
-    virtual ~ AbstractClipItem();
+    ~ AbstractClipItem() override;
     ItemInfo info() const;
     CustomTrackScene *projectScene();
     void updateRectGeometry();
diff --git a/src/timeline/clip.h b/src/timeline/clip.h
--- a/src/timeline/clip.h
+++ b/src/timeline/clip.h
@@ -36,7 +36,7 @@
 public:
     explicit Clip(Mlt::Producer &producer);
     Clip(Clip &other);
-    ~Clip();
+    ~Clip() override;
     Clip &operator=(Clip &other);
     const QByteArray xml();
     /** @brief: Clone a producer (creates a completely independent copy). */
diff --git a/src/timeline/clipdurationdialog.h b/src/timeline/clipdurationdialog.h
--- a/src/timeline/clipdurationdialog.h
+++ b/src/timeline/clipdurationdialog.h
@@ -37,7 +37,7 @@
 
 public:
     explicit ClipDurationDialog(AbstractClipItem *clip, const Timecode &tc, const GenTime &min, const GenTime &max, QWidget *parent = nullptr);
-    ~ClipDurationDialog();
+    ~ClipDurationDialog() override;
     GenTime startPos() const;
     GenTime cropStart() const;
     GenTime duration() const;
diff --git a/src/timeline/clipitem.h b/src/timeline/clipitem.h
--- a/src/timeline/clipitem.h
+++ b/src/timeline/clipitem.h
@@ -47,7 +47,7 @@
 
 public:
     ClipItem(ProjectClip *clip, const ItemInfo &info, double fps, double speed, int strobe, int frame_width, bool generateThumbs = true);
-    virtual ~ ClipItem();
+    ~ ClipItem() override;
     void paint(QPainter *painter,
                const QStyleOptionGraphicsItem *option,
                QWidget *) Q_DECL_OVERRIDE;
diff --git a/src/timeline/customtrackscene.h b/src/timeline/customtrackscene.h
--- a/src/timeline/customtrackscene.h
+++ b/src/timeline/customtrackscene.h
@@ -41,7 +41,7 @@
 
 public:
     explicit CustomTrackScene(Timeline *timeline, QObject *parent = nullptr);
-    ~CustomTrackScene();
+    ~CustomTrackScene() override;
     void setSnapList(const QList<GenTime> &snaps);
     GenTime previousSnapPoint(const GenTime &pos) const;
     GenTime nextSnapPoint(const GenTime &pos) const;
diff --git a/src/timeline/customtrackview.h b/src/timeline/customtrackview.h
--- a/src/timeline/customtrackview.h
+++ b/src/timeline/customtrackview.h
@@ -50,7 +50,7 @@
 
 public:
     CustomTrackView(KdenliveDoc *doc, Timeline *timeline, CustomTrackScene *projectscene, QWidget *parent = nullptr);
-    virtual ~ CustomTrackView();
+    ~ CustomTrackView() override;
 
     void mousePressEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
     void mouseReleaseEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
diff --git a/src/timeline/effectmanager.h b/src/timeline/effectmanager.h
--- a/src/timeline/effectmanager.h
+++ b/src/timeline/effectmanager.h
@@ -38,7 +38,7 @@
 public:
     explicit EffectManager(Mlt::Service &producer, QObject *parent = nullptr);
     EffectManager(EffectManager &other);
-    ~EffectManager();
+    ~EffectManager() override;
     EffectManager &operator=(EffectManager &other);
     Mlt::Service &producer();
     void setProducer(Mlt::Service &producer);
diff --git a/src/timeline/headertrack.h b/src/timeline/headertrack.h
--- a/src/timeline/headertrack.h
+++ b/src/timeline/headertrack.h
@@ -35,7 +35,7 @@
 
 public:
     HeaderTrack(const TrackInfo &info, const QList<QAction *> &actions, Track *parent, int height, QWidget *parentWidget);
-    virtual ~HeaderTrack();
+    ~HeaderTrack() override;
     bool isTarget;
     void setLock(bool lock);
     void adjustSize(int height);
diff --git a/src/timeline/keyframeview.h b/src/timeline/keyframeview.h
--- a/src/timeline/keyframeview.h
+++ b/src/timeline/keyframeview.h
@@ -52,7 +52,7 @@
     };
 
     explicit KeyframeView(int handleSize, QObject *parent = nullptr);
-    virtual ~KeyframeView();
+    ~KeyframeView() override;
 
     /** The position of the currently active keyframe */
     int activeKeyframe;
diff --git a/src/timeline/managers/previewmanager.h b/src/timeline/managers/previewmanager.h
--- a/src/timeline/managers/previewmanager.h
+++ b/src/timeline/managers/previewmanager.h
@@ -52,7 +52,7 @@
 
 public:
     explicit PreviewManager(KdenliveDoc *doc, CustomRuler *ruler, Mlt::Tractor *tractor);
-    virtual ~PreviewManager();
+    ~PreviewManager() override;
     /** @brief: initialize base variables, return false if error. */
     bool initialize();
     /** @brief: a timeline operation caused changes to frames between startFrame and endFrame. */
diff --git a/src/timeline/markerdialog.h b/src/timeline/markerdialog.h
--- a/src/timeline/markerdialog.h
+++ b/src/timeline/markerdialog.h
@@ -44,7 +44,7 @@
 
 public:
     explicit MarkerDialog(ClipController *clip, const CommentedTime &t, const Timecode &tc, const QString &caption, QWidget *parent = nullptr);
-    ~MarkerDialog();
+    ~MarkerDialog() override;
 
     CommentedTime newMarker();
     QImage markerImage() const;
diff --git a/src/timeline/timeline.h b/src/timeline/timeline.h
--- a/src/timeline/timeline.h
+++ b/src/timeline/timeline.h
@@ -62,7 +62,7 @@
 
 public:
     explicit Timeline(KdenliveDoc *doc, const QList<QAction *> &actions, const QList<QAction *> &rulerActions, bool *ok, QWidget *parent = nullptr);
-    virtual ~ Timeline();
+    ~ Timeline() override;
 
     /** @brief is multitrack view (split screen for tracks) enabled */
     bool multitrackView;
diff --git a/src/timeline/track.h b/src/timeline/track.h
--- a/src/timeline/track.h
+++ b/src/timeline/track.h
@@ -52,7 +52,7 @@
      * @param playlist is the MLT object used for monitor/render
      * @param fps is the read speed (frames per seconds) */
     explicit Track(int index, const QList<QAction *> &actions, Mlt::Playlist &playlist, TrackType trackType, int height, QWidget *parent = nullptr);
-    ~Track();
+    ~Track() override;
 
     struct SlowmoInfo {
         double speed;
diff --git a/src/timeline/transition.h b/src/timeline/transition.h
--- a/src/timeline/transition.h
+++ b/src/timeline/transition.h
@@ -41,7 +41,7 @@
 public:
 
     Transition(const ItemInfo &info, int transitiontrack, double fps, const QDomElement &params = QDomElement(), bool automaticTransition = false);
-    virtual ~Transition();
+    ~Transition() override;
     void paint(QPainter *painter,
                const QStyleOptionGraphicsItem *option,
                QWidget *widget) Q_DECL_OVERRIDE;
diff --git a/src/titler/KoSliderCombo.h b/src/titler/KoSliderCombo.h
--- a/src/titler/KoSliderCombo.h
+++ b/src/titler/KoSliderCombo.h
@@ -53,7 +53,7 @@
     /**
      * Destructor
      */
-    virtual ~KoSliderCombo();
+    ~KoSliderCombo() override;
 
     /**
      * The precision of values given as the number of digits after the period.
diff --git a/src/titler/titlewidget.h b/src/titler/titlewidget.h
--- a/src/titler/titlewidget.h
+++ b/src/titler/titlewidget.h
@@ -69,7 +69,7 @@
      * @param render project renderer
      * @param parent (optional) parent widget */
     explicit TitleWidget(const QUrl &url, const Timecode &tc, const QString &projectTitlePath, Render *render, QWidget *parent = nullptr);
-    virtual ~TitleWidget();
+    ~TitleWidget() override;
     QDomDocument xml();
     void setXml(const QDomDocument &doc, const QString &id = QString());
 
diff --git a/src/titler/unicodedialog.h b/src/titler/unicodedialog.h
--- a/src/titler/unicodedialog.h
+++ b/src/titler/unicodedialog.h
@@ -21,7 +21,7 @@
     /** \brief The input method for the dialog. Atm only InputHex supported. */
     enum InputMethod { InputHex, InputDec };
     explicit UnicodeDialog(InputMethod inputMeth, QWidget *parent = nullptr);
-    ~UnicodeDialog();
+    ~UnicodeDialog() override;
 
 private Q_SLOTS:
     void slotAccept();
@@ -40,7 +40,7 @@
 public:
 
     explicit UnicodeWidget(UnicodeDialog::InputMethod inputMeth, QWidget *parent = nullptr);
-    ~UnicodeWidget();
+    ~UnicodeWidget() override;
 
     /** \brief Returns infos about a unicode number. Extendable/improvable ;) */
     QString unicodeInfo(const QString &unicode);
diff --git a/src/utils/abstractservice.h b/src/utils/abstractservice.h
--- a/src/utils/abstractservice.h
+++ b/src/utils/abstractservice.h
@@ -63,7 +63,7 @@
         ARCHIVEORG = 3 };
 
     explicit AbstractService(QListWidget *listWidget, QObject *parent = nullptr);
-    ~AbstractService();
+    ~AbstractService() override;
     /** @brief Get file extension for currently selected item. */
     virtual QString getExtension(QListWidgetItem *item);
     /** @brief Get recommEnded download file name. */
diff --git a/src/utils/archiveorg.h b/src/utils/archiveorg.h
--- a/src/utils/archiveorg.h
+++ b/src/utils/archiveorg.h
@@ -37,7 +37,7 @@
 
 public:
     explicit ArchiveOrg(QListWidget *listWidget, QObject *parent = nullptr);
-    virtual ~ArchiveOrg();
+    ~ArchiveOrg() override;
     QString getExtension(QListWidgetItem *item) Q_DECL_OVERRIDE;
     QString getDefaultDownloadName(QListWidgetItem *item) Q_DECL_OVERRIDE;
 
diff --git a/src/utils/flowlayout.h b/src/utils/flowlayout.h
--- a/src/utils/flowlayout.h
+++ b/src/utils/flowlayout.h
@@ -49,7 +49,7 @@
 public:
     explicit FlowLayout(QWidget *parent, int margin = -1, int hSpacing = -1, int vSpacing = -1);
     explicit FlowLayout(int margin = -1, int hSpacing = -1, int vSpacing = -1);
-    ~FlowLayout();
+    ~FlowLayout() override;
 
     void addItem(QLayoutItem *item) Q_DECL_OVERRIDE;
     int horizontalSpacing() const;
diff --git a/src/utils/freesound.h b/src/utils/freesound.h
--- a/src/utils/freesound.h
+++ b/src/utils/freesound.h
@@ -37,7 +37,7 @@
 
 public:
     explicit FreeSound(QListWidget *listWidget, QObject *parent = nullptr);
-    ~FreeSound();
+    ~FreeSound() override;
     QString getExtension(QListWidgetItem *item) Q_DECL_OVERRIDE;
     QString getDefaultDownloadName(QListWidgetItem *item) Q_DECL_OVERRIDE;
 
diff --git a/src/utils/openclipart.h b/src/utils/openclipart.h
--- a/src/utils/openclipart.h
+++ b/src/utils/openclipart.h
@@ -36,7 +36,7 @@
 
 public:
     explicit OpenClipArt(QListWidget *listWidget, QObject *parent = nullptr);
-    ~OpenClipArt();
+    ~OpenClipArt() override;
     QString getExtension(QListWidgetItem *item) Q_DECL_OVERRIDE;
     QString getDefaultDownloadName(QListWidgetItem *item) Q_DECL_OVERRIDE;
 
diff --git a/src/utils/progressbutton.h b/src/utils/progressbutton.h
--- a/src/utils/progressbutton.h
+++ b/src/utils/progressbutton.h
@@ -40,7 +40,7 @@
     Q_OBJECT
 public:
     explicit ProgressButton(const QString &text, double max = 100, QWidget *parent = nullptr);
-    ~ProgressButton();
+    ~ProgressButton() override;
     int progress() const;
     void setProgress(int);
     void defineDefaultAction(QAction *action, QAction *actionInProgress);
diff --git a/src/utils/resourcewidget.h b/src/utils/resourcewidget.h
--- a/src/utils/resourcewidget.h
+++ b/src/utils/resourcewidget.h
@@ -50,7 +50,7 @@
 
 public:
     explicit ResourceWidget(const QString &folder, QWidget *parent = nullptr);
-    ~ResourceWidget();
+    ~ResourceWidget() override;
 
 private slots:
     void slotStartSearch(int page = 0);
diff --git a/src/utils/thememanager.h b/src/utils/thememanager.h
--- a/src/utils/thememanager.h
+++ b/src/utils/thememanager.h
@@ -46,7 +46,7 @@
 
 public:
 
-    ~ThemeManager();
+    ~ThemeManager() override;
     static ThemeManager *instance();
 
     QString currentThemeName() const;
diff --git a/thumbnailer/mltpreview.h b/thumbnailer/mltpreview.h
--- a/thumbnailer/mltpreview.h
+++ b/thumbnailer/mltpreview.h
@@ -32,7 +32,7 @@
 {
 public:
     MltPreview();
-    virtual ~MltPreview();
+    ~MltPreview() override;
     bool create(const QString &path, int width, int height, QImage &img) Q_DECL_OVERRIDE;
     Flags flags() const Q_DECL_OVERRIDE;