How can I rotate one camera but not the other, in motion?

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http://unix.stackexchange.com – I have two webcams configured in motion. Due to the way I'm positioning one of these cameras, it needs to be rotated upside down (180 degrees). I tried putting this in it's tread.cfg file: rotate 180 But this turned both the cameras upside down. How can I make it effect just one of them? (HowTos)