In front of the place I work, Ghent University is constructing a new building with two large auditoria and office space, called "Het Ufo" (Universiteitsforum). Being in the digital age, there was of course a webcam pointing at the construction site. Since 21 September 2007, I had a cron job running to capture a photo each day. Apparently, the cron job died on 18 august 2009 for some reason, so my pile of daily photo's stopped growing. Time to put them together in a time-lapse video:
Update: Michiel Ronsse (see comments below) also had a cron job running and kindly provided me with extra frames from July 2007 to September 2007. This is the part when there is no concrete yet.
For more nerdiness, a bit of making-of info (all on Linux of course).
The bash script to capture a frame from the publicly accessible webcam (which I won't disclose) was:
filename=~/ufo-webcam/frame-$(date +"%Y")/frame-$(date +"%Y-%m-%d-%H-%M-%S").jpg wget -O $filename --timeout=60 http://webcamurl 2>&1
With cron, I executed this script once a day, generating files like
To generate a video from this, I used the command line tool transcode. First I had to generate a list with the filenames of the frames:
ls */frame-200?-??-??-12-??-??.jpg | sort > framelist.txt
And then "convert" this list file
framelist.txt to a real video:
transcode -i framelist.txt -x imlist,null -g640x480 --use_rgb -z -y xvid,null -f5 -o frames.avi -H 0
I don't remember what all the options are for, but they were needed to make it work on my setup.