usb camera input

someone knows how to detect usb camera input?
Automator downloads images into the ‘pictures’ folder, but i want another place.

Edit: (i found a method)
i answer for myself, just in case somebody other has the same question: to download images from a camera into another folder as ‘pictures’ (e.g. folder ‘Import’’ of pictures folder), without using application ‘camera connect’, open this app.
In the preferences you’ll be able to change and set the right application, when you connect a camera. Put your applescript application as the default application and ‘camera connect’ won’t open.