Time Lapse

Creating time lapse videos using the Raspberry Pi and camera is incredibly easy, and you can create some really cool looking videos at the end of it. To make a time lapse video, you will need a Pi and a camera module.

1.  Set up your Raspberry Pi in the desired place.
2. Test the positioning of the camera by taking a still photo (find out how to do this here)
3. When you are happy, enter this code in the command line (LXTerminal): raspistill -o ****_%04d.jpg -tl 60000 -t 7200000
4. This command will take a photo every 60 seconds (60000 milliseconds) for 2 hours (7200000 milliseconds) You can change this to whatever you like. The stars can be replaced by the image name of your choice.
5. The bit of code that looks like this: %04d.jpg is telling the pi to name each photo with an increasing 4 digit number. Again, the .jpg means that the photos will be saved in .jpg format. 
6. Press enter, and leave the pi to do its business for the amount of time you specified. 
7. When the Pi has finished, you will find loads of pictures in your home directory. 

Note: Make sure that you don't move the Pi at all during the stills being captured, this will result in a poor quality end product.

 To create your video on your Pi:

1. Type the following into the command line: sudo apt-get -y install libav-tools
2. Press enter
3. Then, type this and press enter. avconv -r 10 -1 *****_%04d.jpg -r 10 -vcodec libx264 -crf 20 -g 15 ------.mp4
4. Replace the stars with the name that your images were called, and the dashes with the name you wish your video to be called.
5. When this has finished, you can view your video in omxplayer, as demonstrated here.

taken from http://www.raspberrypitutorials.yolasite.com/time-lapse-videos.php