Re: [Gimp-user] batch mode in gimp?

[Ofnuts <ofnuts laposte net>]

On 08/01/2013 04:10 PM, Josef Wolf wrote:
> Hello,
>
> I am trying to use gimp in batch mode. Unfortunately, I can't find any
> examples of how to do _real_ batch processing. All the examples on the
> net show how to integrate into the gui.
>
> I see that I can use the -b flag to invoke script-fu functions. But AFAICS,
> the script with the function definitions needs to reside somewhere in
> ~/gimp-x.y/scripts or something.
>
> In addition, I can't find a way to pass command line arguments to the called
> functions.
>
> Is there any way to define/execute functions? For example, I'd like to call
> simple-unsharp-mask from http://www.gimp.org/tutorials/Basic_Batch/ like this:
>
>   $ call-gimp-function script.scm simple-unsharp-mask file.png 5.0 0.5 0
>
> Is there any way to achieve this? Any hints?

For such simple processing, you should consider using ImageMagick. Here 
my script that, for all the files in the directory:
- boosts the saturation a bit
- reduces the files to 3000px wide
- sharpens a bit
- saves with quality 85
--------------------------------
#! /bin/bash

dir=${1:-.}

for f in "$dir/"*.JPG;
do
    echo "Exporting $f"
    convert "$f" -modulate 100,120  -geometry 3000 -sharpen 0x1.0 
-quality 85 "$dir/$(basename "$f" .JPG).jpg"
done
--------------------------------

Runs in about 5 seconds/file (on 12Mpx source files) on my PC (Core 
i5-3320M CPU @ 2.60GHz, Ubuntu AMD64)

If you insist in using Gimp for this, PM me and I'll send you a sample 
batch script (uses Python) with sample command lines for Linux and Windows