I've been watching the feed from a webcam (Foscam 8910). When the scene is bright (lit with sunshine) the video feed is approx. 350 kBytes/sec. When I view the same scene lit very dully with just a dim bulb, the feed comes at approx. 50 kBytes/sec.
As I understand it, the video feed only transmits the changes between frames. Once the image has been transmitting for a few seconds, and there is no change whatsoever in the scene, the feed should settle down.
Why is there a seven fold difference in network traffic between light and dark scenes? Shouldn't they be identical?