Control a USB Video Class compliant webcam from node. Most modern USB webcams use a common set of controls standardized by the USB Implementers Forum. You can use this set of controls to change certain things on the camera, such as the brightness, contrast, zoom level, focus and so on. Every USB device has a vendorId and productId. You can use Device Manager (Windows), System Information (Mac) or lsusb (Linux) to find these, or you can use the list-devices.js in this repo to find the right paramters.