@item in_w, iw
@item in_h, ih
-the input video width and heigth
+the input video width and height
@item out_w, ow
@item out_h, oh
-the output width and heigth, that is the size of the padded area as
+the output width and height, that is the size of the padded area as
specified by the @var{width} and @var{height} expressions
@item rotw(a)