ImageMagick

Here is how to pad out an image (change its width)

convert 01853.jpg -bordercolor black -border 96x0 -gravity center bob.jpg

News: Zinc 0.7.1.0 release Nov 16, 2012; Zinc 0.7.0.0 release Apr 16, 2012; Cmgui 2.9.0 released Apr 16, 2012; Zinc 0.7.0.0 release candidate release Jan 31, 2012; Zinc 0.7.0.0 beta release Nov 10, 2011; More news…