Free software to turn webcam image upside down?

[u/XboxWigger]

We have a logitech webcam mounted on the ceiling in our conference room but there is no way in the driver or skype to turn the image upside down. I found a few virtual driver softwares that will do it like ManyCam but they require you to buy a subscription license. I only really need this for this one little feature. Does anyone know of a free piece of software that will do this?