Values.RectangleSourceUse Rectangle to identify a specific area of the video frame.
type nonrec t = {height : int option;Height of rectangle in pixels. Specify only even numbers.
*)width : int option;Width of rectangle in pixels. Specify only even numbers.
*)x : int option;The distance, in pixels, between the rectangle and the left edge of the video frame. Specify only even numbers.
*)y : int option;The distance, in pixels, between the rectangle and the top edge of the video frame. Specify only even numbers.
*)}