Sets the render position and dimensions of the rectangle on the video.
This function is mainly for elements that modify the size of the video in some way (e.g. through scaling or cropping) and need to adjust the details of any overlays to match the operation that changed the size.
this must be writable, meaning its refcount must be 1. You can make the rectangles inside a OverlayComposition writable using make_writable or copy.
| this | |
| render_x |
render X position of rectangle on video |
| render_y |
render Y position of rectangle on video |
| render_width |
render width of rectangle |
| render_height |
render height of rectangle |