Synfig Studio is a free and open-source 2D animation software,
designed as powerful industrial-strength solution for creating
film-quality animation using a vector and bitmap artwork. It
eliminates the need to create animation frame-by frame, allowing
you to produce 2D animation of a higher quality with fewer people
and resources.

This package contains the command line renderer used to convert synfig .sif
files to raster images, videos and other formats. Layer types include
geometric, gradient, filter, distortion, transformation, fractal and
others.