Editly is a tool and framework for declarative NLE (non-linear video editing) using Node.js and ffmpeg. Editly allows you to easily and programmatically create a video from a set of clips, images, audio and titles, with smooth transitions and music overlaid.
# Create an alias
$ alias editly='docker run --rm -u $(id -u):$(id -g) -v $PWD:/data vimagick/editly'
# Make config file
$ cat slideshow.json5
# Do video transcoding
$ editly --fast slideshow.json5