Tried googling, didn't work. So, I'm using ubuntu 13.04. My webcam is an integrated ASUS. And I don't really know what I'm doing. If there is some software that would allow me to, like flip my video (Like many cam for ubuntu) or some command that I could use that would just intercept the data from my webcam and flip it then I'd love you.
The real problem is that webcam often is mounted upside down. It is a driver job to reverse the image, so if you have this kind of problem it means there is something from with the webcam driver. If you use Linux, I suggest to follow this HOW-TO The site is in Italian, you can see an English translation Here.