scriptfu could says what values to be expected instead of saying only
"Error: Invalid value for argument 1"
Moreover it can provide an example how to set the arguments in a variable.
eg. (file-webp-export  1 0 0 0 a.jpg b.jpg) can save a as b with these numberd arguments means ...  


How to export all my jpg images as webp using gimp in linux bash in batch?

gimp -i  -b '(let* ((image (car (gimp-file-load RUN-NONINTERACTIVE "DSC_0978.JPG"))))(file-webp-export RUN-NONINTERACTIVE image "DSC_0978.webp" lossless include-exif include-xmp))' --batch-interpreter="plug-in-script-fu-eval"

I cant understand what arguments must put in which positions. Script fu menu for file-webp-export has a lot! Whcih of these are essential and in what positions?

I have a dual boot set up (Windows 11/Ubuntu 24.04) with Gimp 2.10.38.
In GIMP on my Ubuntu OS I want to make a bookmark for the my images folder (not sure of the English Windows folder name) on the Windows drive. I can access this folder in the open dialogue but if I want to bookmark it, the bookmark option is greyed out. Note that I can make bookmarks for other folders on the Windows drive.

When I add a bookmark it is shown in the left pane. But when I open the open dialogue again the bookmark has disappeared.

I use Gimp 2.10.38 on Ubuntu 24.04

Same JPG picture with 100% quality in GIMP, and saving all information, without any other processing
a) Saving it as WEBP, result half size.
b) Running  mogrify -quality 100 -format  webp on same JPG picture, double size resulted.

Why? What is doing GIMP and what is doing IM6 mogrify when transforming JPG to webp format?
Note that the differences in picture quality between JPG and gimp 100% webp and im6 100% webp in full zoom are almost not visible.


The original picture.
greek carnaval pic

Because i have GIMP 3, is lacking scipt-fu in menu (why?)
using bash, i try to make all jpg to be saved as webp. How?


gimp -i --verbose -b '(let* (file-webp-save 1 image drawable "$webp_name" "$webp_name" 0 $lossless $quality 100.0 1 1 1 0 0 0 0 67 0))' --batch-interpreter="plug-in-script-fu-eval"

i am trying to select the outline of an image, but the outline is not all the same color and is slightly blended into the main color. my goal is to make the whole outline all the same color.

I've been erasing the background on an image (saving frequently) but then out of nowhere the eraser stopped working.  I can still change the brushes, sizes, opacity, etc., but it doesn't erase.  On the toolbox under Eraser the Mode says Normal and I can't change that, but I'm so new I don't know if that's typical or not.  Since I shut down and came back to working on it, is there a history I can go back to and pick up from there?  Thanks!

A few days a ago I created a closed path, edited it a bit, and saved it as an svg file.

Today I tried to load the path and edit it some more.  The path loaded and I can see it.  I am in path editing mode and can't edit the path.  I can not see the points in the path.  The cursor stays the same -- with a little circle with a slash through it -- no matter what I do.  I try clicking on the path and nothing happens.  I can't move any points.

What can be done to fix this?

Today, I cannot  get a gradient that is anything but about 30% opacity -- pastel -- even if I close GIMP and then start with a new document. Solid fills, e.g., FG/BG, are fine. Layer is Normal; I can't find anything else that might be astray. I am only an occasional user, bout I have used GIMP a fair amount over a decade and have never encountered this problem.

Thanks.

   

This user has a long and noteworthy track record of not understanding how/where/why/when/who GIMP is installed on my Win10 PCs. I have just noticed that some components of my installed version 2.10.38 (replacing 2.10.28, I think, some considerable time ago) appear in two places, at least. For example:

- %AppData%\Local\Programs\GIMP 2\share\gimp\2.0\brushes

-%AppData%\Roaming\GIMP\2.10\brushes

Most of the resource folders in this 2.10 directory are more than 2 years old and are empty (e.g. the brushes folder), but all of the files in 2.10 with filename ‘*rc’ (no extension) were updated this morning. So I am in doubt about whether or not I can delete this GIMP data in %AppData%\Roaming\.

Any advice?

SO…I have some questions about brushes, first one is, if I alter a brush type and size can I save those settings so that I  I don't have to readjust a brush again to get those settings? And if I can where would I find that brush should I want to use it again. Also, is there a way to pick out a few favorite brushes to make a set out that I can dock, so I don't have to go through all of the brushes to find them every time. Thank you for any help.