[Python-fu/Gimp] Vadim's Batch - written for https://stackoverflow.com/a/42933365/7653274

Vadim's Batch.py

#!/usr/bin/env python

from gimpfu import *
import glob
import os

pdb = gimp.pdb

def vadimsbatch(loadfolder, fileextension, frame):

# correct loadfolder: add (back-)slash if needed
    if not loadfolder.endswith(("/", "\\")):
        if os.name == "nt": # we need backslashes on windows, but slashes on linux/mac
            loadfolder = loadfolder + "\\"
        else:
            loadfolder = loadfolder + "/"

# prepare the file pattern
    filepattern = loadfolder + fileextension
    filelist = glob.glob(filepattern)
    filelist.sort()
    # gimp.message(" ".join(filelist) # for debugging

# loop once for every file
    for filepath in filelist:
    # load image
        if filepath.endswith((".jpeg,", ".jpg")):
            image = pdb.file_jpeg_load(filepath, filepath)
        elif filepath.endswith(".png"):
            image = pdb.file_png_load(filepath, filepath)
        layer = image.active_layer
    # prepare filename
        if os.name == "nt": # we need backslashes on windows, but slashes on linux/mac
            outputfolder = "%soutput\\" % loadfolder # add the name of a new folder
        else:
            outputfolder = "%soutput//" % loadfolder # add the name of a new folder
        gimp.message(outputfolder)
        if not os.path.exists(outputfolder):
                os.makedirs(outputfolder) # create the new folder if it doesn't exist yet
        filename = os.path.basename(filepath) # remove the path and only keep the actual filename with extension
        outputpath = outputfolder + filename

        # now the actual work
        image.active_layer.scale(190, 120, 0, -10) # resize and move up
        image.resize(190, 120, 0, 10)
        #pdb.gimp_image_select_rectangle(image, 0, 0, -10, 190, 0)
        #pdb.gimp_edit_cut(layer)

        framelayer = pdb.gimp_file_load_layer(image, frame) # load the frame as new layer
        image.add_layer(framelayer)
        image.merge_visible_layers(0)
        pdb.file_png_save_defaults(image, image.active_layer, outputpath, outputpath)
        outputpath = "%s.xcf" % outputpath
        pdb.gimp_xcf_save(0, image, image.active_layer, outputpath, outputpath)


register(
    "vadimsbatch",
	N_("*Creative Description*"),
	"*Creative Description*",
	"MCOfficer",
	"@Copyright 2017",
	"2017",
	N_("_Vadim's Batch"),
	"",
	[
    (PF_STRING, "loadfolder", "The location of your textures.", ""),
	(PF_STRING, "fileextension", "Files that should be loaded. Use * to load all files in this folder.", "*.jpg"),
    (PF_FILE, "frame", "Select your frame", None)
	],
	[],
	vadimsbatch,
	menu="<Toolbox>/Scripts/",
	domain=("gimp20-python", gimp.locale_directory)
)

main()

Thanks for letting your script public ! This helped me greatly for writing my own batch script :)

You're welcome, but be aware that this was written for an older gimp version, and it's very much a novice's work. For example, the section around L34 could be made significantly safer by using os.path.join instead of string concatenation.

Well, I did not have any problem with my own implementation and it's for personal use only. Your code gave me the template I needed. I have a hard time working off documentation only