code: def set_video_crop(self, x1, y1, x2, y2):
          
          crop = "%s %s %s %s" % (str(x1),str(y1),str(x2),str(y2))
          self._player_interface.SetVideoCropPos(ObjectPath('/not/used'), String(crop))
docs: Args:
              x1 (int): Top left x coordinate (px)
              y1 (int): Top left y coordinate (px)
              x2 (int): Bottom right x coordinate (px)
              y2 (int): Bottom right y coordinate (px)