Now let’s have some fun with our camera, we’ll record a time lapse sequence. Point your camera out of a window where there is some action i.e. a busy street or a playground . Open up LX Terminal and type in the the following code, we’ll create a folder named webcam for our time-lapse pics first :
lets start the code for the timelapse:
raspistill -o image_%04d.jpg -tl 60000 - t 72000000
This will record an image every minute (60000 milliseconds) for 2 hours (7200000 milliseconds) and place all the pics in our folder webcam. Now’s a good time to have a break – make a cup of tea, maybe do some hoovering – or just do some python tutorials ? After 2 hours you should have a folder of . . . yes you guessed it 120 pictures !! Lets put them together in a time-lapse movie: Back to LX Terminal – type in the following code:
sudo apt-get install mencoder
This will install the software we need to ‘stitch’ the pictures together, now navigate in to your webcam folder:
ls *.jpeg >stills.txt
this will make a list of the images in your folder, lets make the time lapse clip – type this long string in one line – pay attention to spaces.
mencoder -nosound -ovc lavc -lavcopts vcodec=mpeg4:aspect=16/9:
vbitrate=8000000-vf scale=1920:1080 -o timelapse.avi -mf
you will now have a short clip named timelapse.avi in your folder ready to play with omx-player:
Congratulations , you should now have your first time-lapse movie playing on your screen.