Re: [Gimp-user] interactive batch processing

[Ofnuts <ofnuts gmx com>]

On 12/9/18 7:50 PM, Gary Aitken wrote:
> In the past I have interactively batch processed images via a shell 
> script
> that invokes gimp for each image.  This is both inconvenient and slow.
> Inconvenient because there are parameters I need to enter into some 
> python-fu
> scripts that are the same for each of the images, and slow because of the
> gimp startup and shutdown each time.
>
> Is there a way to do one of the following:
>
> A. Start gimp with a list of file names to process, and have it load only
>    the first on the list.  Then when one quits or closes the image, load
>    the next one, etc?
>
> B. I can feed the list of file names to a python-fu script, which then 
> can
>    open and display the image.  Is there a way for a python-fu script to
>    wait for, or be notified of, the closing of an image display? This
>    would allow the script to effectively pause and allow processing 
> before
>    opening each successive image.  gimp-context-push/pop seem like they
>    may somehow enable this but it's not clear to me how they are used.
>
> It seems like gimp-display-get-window-handle might be useful somehow, if
> there were a means to be notified when the window is destroyed.


A) my own ofn-file-next  script may help if the files are in some 
recognizable numerical sequence (IMG_678.JPG, IMG_679.JPG, 
IMG_690.JPG)(some holes in the sequence are allowed). You can assign it 
to some keyboard shortcut and it will export/close the current image, 
and load the next in the sequence. Typically you start Gimp, usin 
File>Ope, to open the first file in th eseqquence, and hit the shortcut 
to advance to the next file. Available here: 
<http://sourceforge.net/projects/gimp-tools/files/scripts/>.

This, combined with the "Repeat last filter" (Ctrl-F) (at the top of the 
"Filters" menu, repeats the last filter on the current image with the 
same parameters), should make you process your image sequence rather 
quickly (two keystrokes per image).

B) You can write a script that reads a list of files (or lists files in 
a directory), and loads each file, applies a filter, and saves the 
result. But you don't really change the behavior of the initial script. 
gimp_context_{push|pop} have nothing to do with this, they are used to 
save/restore the paint context (FG/BG colors, gradient, brush... etc). 
An example here: 
<https://stackoverflow.com/questions/44430081/how-to-run-python-scripts-using-gimpfu-from-windows-command-line/44435560#44435560> 


There is also a "BIMP" Gimp plugin (the B is for "Batch") that is 
supposed to be able to run Gimp commands over a series of files. I don't 
know how well it supports a random filter.