Output resolution does not match input resolution

[dipam7]

Is there a reason we are multiplying 320 to the frame size here

rembg-greenscreen/src/rembg/multiprocessing.py

Lines 120 to 125 in b79648a

	'-y',
	'-f', 'rawvideo',
	'-vcodec', 'rawvideo',
	'-s', F"{frame.shape[1]}x320",
	'-pix_fmt', 'gray',
	'-r', F"{framerate}",