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Here's a video made using Ripper which captured images every few minutes from a webcam in San Francisco. I like the end where you can see the planes coming in to land.
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Ripper is an application that periodically grabs online images to create timelapse movies. Pictures are ripped off a specified website every few seconds, minutes or hours (whatever the user decides), then they are merged together as frames in a time-lapse video. Some cool effects can be achieved this way.
For more details see this page.
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