Laurent22 on Github has developed a very simple bash script for capturing images using a standard default webcam with motion detection support attached to your system. This bash script process was developed to assist Laurent22 to record what his dog was doing while he wasn't at home.

The daily driver used by Laurent 22 is OSX. However, the bash script that he developed for creating images that can be converted into a motion picture .mp4 file for viewing using VLC Media Player, is cross-platform and can be run in Linux and MS Windows as well.