MACROMEDIA FLASH MX 2004-ACTIONSCRIPT LANGUAGE Reference page 199

Example
The following examples illustrate how to use this method to control bandwidth use and
picture quality.
// Ensure that no more than 8192 (8K/second) is used to send video
active_cam.setQuality(8192,0);
// Ensure that no more than 8192 (8K/second) is used to send video
// with a minimum quality of 50
active_cam.setQuality(8192,50);
// Ensure a minimum quality of 50, no matter how much bandwidth it takes
active_cam.setQuality(0,50);
See also
Camera.bandwidth, , Camera.quality
Camera.get()
Camera.setQuality() 199