image conversion utils

pngto* jpgto* не знаю правда что для них нужно ставить, по крайней мере в мандряке такие были

NAME ImageMagick - commandline utilities to create, edit, or convert images

SYNOPSIS animate [ options ... ] file [ [ options ... ] file ... ]

composite [ options ... ] image composite [ mask ] compos- ited

conjure [ options ] script.msl [ [ options ] script.msl ]

convert [ [ options ... ] [ input_file ... ] ... [ out- put_file ] ]

display [ options ... ] file ... [ [options ... ]file ... ]

identify file [ file ... ]

import [ options ... ] file

mogrify [ options ... ] file ...

montage [ options ... ] file [ [ options ... ] file ... ] output_file

DESCRIPTION ImageMagick provides a suite of commandline utilities for creating, converting, editing, and displaying images:

-офигенная вещь

gimp --batch