QWidget *get_view_settings_form(QWidget *parent) const;
QWidget *get_decoder_settings_form(QWidget *parent);
QWidget *get_about_page(QWidget *parent) const;
QWidget *get_view_settings_form(QWidget *parent) const;
QWidget *get_decoder_settings_form(QWidget *parent);
QWidget *get_about_page(QWidget *parent) const;