How do I keystone (alter perspective) on a batch of images?

I have a number of images to which I need to apply the same perspective change so as to make them appear correct when projected onto a screen where the projector is not square on.

Thank you

Using GIMP 2.8.2 on a Mac with OS 10.14.6
Would appreciate step-by-step instructions as I am a bit of a newbie to Gimp.

Bringing BASIC back: 
https://opensource.microsoft.com/blog/20...6502-basic

Hi! Using Gimp keyboard shortcuts really make things faster. I recently installed Lubuntu and Gimp. Nice! But first thing i noted was that the usual "ctrl+alt+mouse scrollwheel" that increase and decrease the size of the brush, was assigned to the system virtual desktops. Bad! I guess i can make changes in Lubuntu of in Gimp. I wonder how you manage this issue? Would be nice to be consistent across different systems, so, when you open Gimp you forget where you are working.
Thanks

Hi.Is not a bug, but i believe an error in the distribution of text in the "Mode" selection of layers. It happens in windows as well as in Linux. While there is plenty of room to show all the modes at once, you need to scroll to see them, meanwhile the upper space is empty. Here an screenshot:
   

Hi all ! 

With Gimp, the most part of time I works on photos to simply add extra layers and export the result (maps, explanations, mechanisms, and so).

In this case I do not alter the original and keep it.

Recently I realized the most part of my XCF projects take more than 20MB per file vs the originals which take 2MB max.

After digging I understood the problem : projects keep the original raw uncompressed photo on a layer which is a waste of storage as I can include again the original.

In definitive I want to keep the original photo, the exported one and all that allowed to obtain the exported result.

I imagined an external batch process to open the targeted files, remove the usefulness layer, archive the original with the lighted project.

I discovered script-fu language (LISP scheme) and followed tutorial script-fu and experimented it with success.

But I did not found a way to achieve this : get the uncompressed layer size

I found the following procedures which are not "size related" :
- gimp-image-get-layer-by-name
- gimp-image-get-layer-by-tattoo

Is it possible to do this with script-fu ? Is it possible in another way ?

Extra question, is there a way to attach a file to a XCF project (I suppose no) like we usually do it with the email attachments method ? I hoped this could be achieved with an add-on ...


Thank you in advance for the time you will spend to me .

With adelphity
lnj

Hi! I want to erase the same area in multiple layers, and i thought to do it at once. I dont know if is possible.When i group them, appear you cant erase. And i found some old info about "link" layers, but dont found that option in version 3. 
Any tip you can give me about this? thanks

Bonjour à tous,


je suis novice sur Gimp 3,04 et travaille sur windows 10,
à tel point que je n'arrive même pas à vous envoyer une capture d'écran .



je souhaite sélectionner un objet (outil à main levée) et le réduire (outil mise à l'échelle) afin d'insérer l'objet sur une autre photo à la taille souhaitée.
.
Jusqu'à maintenant tout fonctionnait. bien et là impossible de réduire mon objet.
Bien au contraire celui-ci il agrandit.( de 17 fois).


Merci d'avance pour votre aide pour trouver d'où vient mon erreur.

---- please post in English --- thank you ---

I am new to Gimp 3.04 and work on Windows 10,
to the point that I can't even send you a screenshot.

I want to select an object (freehand tool) and reduce it (scale tool) in order to insert the object into another photo at the desired size.
.
Until now, everything was working fine, but now I can't reduce my object.
On the contrary, it enlarges (by 17 times).

Thank you in advance for your help in finding where my mistake is.

Hi! I have been wondering if someone hasexperimente if there are some visible advantages of enabling the clone and deformation preferences in the playground settings?

I'm a developer and currently making a theme editor for Nexus/Winstep with Gimp.

any interest?

Basically I want to make two outlines for an album text via making a text object -> Alpha to selection -> making two empty layers and use grow by 3 px and then fill the color for both outlines (one is custom, the other is pure black), then rotate all three layers by 15deg with NoHalo

Here's an image reference


10 images in and this process has gotten tedious and slow, so is there a way to quicken this process without making a plugin?
Making plugins sounds very intimidating and I don't know if what I want sounds complicated to translate in the code