how to batch crop images in gimp from the command line

[Nickleus]

i'm using gimp 2.6.6
make a file called:
~/.gimp-2.6/scripts/batch-crop.scm
give it these contents:

(define (batch-crop pattern width height xoffset yoffset)
        (let*   ((filelist (cadr (file-glob pattern 1))))
                (while (not (null? filelist))
                        (let* ( (filename (car filelist))
                                (image (car (gimp-file-load RUN-NONINTERACTIVE filename filename)))
                                (drawable (car (gimp-image-get-active-layer image)))
                              )
                                (gimp-image-crop image width height xoffset yoffset)
                                (gimp-file-save RUN-NONINTERACTIVE image drawable filename filename)
                                (gimp-image-delete image)
                        )
                        (set! filelist (cdr filelist))
                )
        )
)

say you have a couple of screenshots you want to crop, e.g., here:
Desktop/screenshots/1.png
Desktop/screenshots/2.png

open gnome-terminal and then cd to the folder where you have the images you want to batch crop, e.g.:

cd Desktop/screenshots/

then run the batch crop script like this:

gimp -i -b '(batch-crop "*.png" 1185 667 5 672)' -b '(gimp-quit 0)'

the 4 numerical parameters are width height x-offset y-offset

ref:
http://www.geocities.com/hildstrom/p...ipt/index.html
http://www.gimp.org/tutorials/Basic_Batch/