[Al Skierkiewicz]

Eric,
Some webcam applications allow you to set capture times. If you think of normal video is 30 frames per second then shooting at one frame per second will allow you to capture people moving within the frame. An average walk speed is about 4 ft./sec. If you capture less often, say 1 frame every ten seconds, some things will show a jerky move and you may miss people altogether. Somewhere between 2 frames/sec and 0.5 frames/sec ought to be good for seeing progress. Over a two hour time frame, 1 frame/sec would yield about 4 minutes of video.