ACCEL2(Gtk::AccelKey(',',Gdk::CONTROL_MASK, "<Actions>//seek-prev-frame" ));
ACCEL2(Gtk::AccelKey('>',Gdk::CONTROL_MASK, "<Actions>//seek-next-second" ));
ACCEL2(Gtk::AccelKey('<',Gdk::CONTROL_MASK, "<Actions>//seek-prev-second" ));
ACCEL2(Gtk::AccelKey(',',Gdk::CONTROL_MASK, "<Actions>//seek-prev-frame" ));
ACCEL2(Gtk::AccelKey('>',Gdk::CONTROL_MASK, "<Actions>//seek-next-second" ));
ACCEL2(Gtk::AccelKey('<',Gdk::CONTROL_MASK, "<Actions>//seek-prev-second" ));