Gnome thumbnail generator

https://github.com/lzap/gnome-thumbgen

Usage: gnome-thumbgen.py [-lnvdf] dir [dir, ...]

Options:
  --version             show program's version number and exit
  -h, --help            show this help message and exit
  -o DIR, --output=DIR  output directory (default: ~/.thumbnails)
  -p STRIP_NUM          strip n elements from the beginning of the path
  -x DIR, --prefix=DIR  add directory to the beginning of the path
  -e REGEXP, --extensions=REGEXP
                        accepted image extensions regular expression (default:
                        jpe?g|png|gif)
  -l, --skip-large      do not create large (256x256) thumbnails
  -n, --no-check        do not check for file existence
  -f, --force           do not comapre file modification time forcing rewrite
                        all thumbnails
  -v, --verbose         print additional information during processing
  -d, --debug           print debugging information