Usage: ./finsprite [options]

Options:
-c | --capture-device <name> Video device name [/dev/video0]
-h | --help  Print this message
-n | --buffer <n>  Number of images in ring buffer [10]
                   Enables motion detection
-s | --stack-length <s>  Length of stacked period in seconds [60]
-m | --min  Enable minimum stacking [default: off]
-M | --max  Enable maximum stacking [default: off]
-a | --ave  Enable average stacking [default: off]
-d | --dif  Enable difference stacking [default: off]
-t | --trig  Enable motion detection with default ring buffer [default: off]
-l | --capture-length <time>  Length of imaging period in seconds [unlimited]
-p | --prefix <prefix>  Image filename prefix [default: none]
-o | --out-dir <dir>  Image output directory [default: current directory]
                      The images are saved to <dir>/yyyy/mm/dd/