Put pictures into animations from the command line.
docker run -v $PWD:/share paulfitz/makesweet \ --zip templates/billboard-cityscape.zip \ --in images/frog.jpg \ --gif animation.gif 
docker run -v $PWD:/share paulfitz/makesweet \ --zip templates/heart-locket.zip \ --start 15 \ --in images/frog.jpg images/monkey.jpg \ --gif animation.gif 
docker run -v $PWD:/share paulfitz/makesweet \ --zip templates/flag.zip \ --in images/dolphin.jpg \ --gif animation.gif 
You can generate a video output instead of a gif by replacing:
--gif animation.gif with:
--vid animation.mp4 See docker run paulfitz/makesweet -h for more options.
The designs come from https://makesweet.com