Timelapse Capture of Google's Predicted Traffic Conditions

1. Display google maps in a browser.
2. Run xwininfo, click the browser window to learn its window id.
3. In zsh: for x ({0..50}) { echo go; import -window 0x12c849a pic-$x.png; echo sleep; sleep 3 }
4. Advance the google traffic time each time the console says 'sleep'.
5. Display one of the frames, get crop points.
6. for x (*.png) { convert -crop 669x703+300+200 -quality 95 $x $x:r.jpg }
7. ffmpeg -r 10 -i pic-%d.jpg timelapse.flv (are there better compression settings for this kind of image?)