This directory contains examples created using this library.
Using the following command (assuming ffmpeg is installed) to combined img1.jpg and img2.jpg into a single side-by-side.
ffmpeg -i img1.jpg -i img2.jpg -filter_complex "[0:v]scale=iw/2:-1,pad=2*iw[left];[1:v]scale=iw/2:-1[right];[left][right]overlay=w" output.jpg