HI,
You are using [extension by jdd] Charlies' content
Have you read and try this following link? Is it easy to understand, or hard ? Can you provide any error message ?
http://www.dodin.org/wiki/pmwiki.php?n= … es#toc-6.2

I would say, either you run this script through a ssh connexion to your host; either you run it home/work-place and then deliver thumbs through FTP to your host. Which OS are your running at home/work-place ?

I haven't read the forum topic which link is given in extension page. It is now a broken link, here is the updated link:
https://piwigo.org/forum/viewtopic.php?id=10671

Hello !
First of all, I tell you the reason why 2 years ago, the uploaded pdf suddenly stopped having their thumbnail automatically generated. I explain in plain words, for I am no technician.

There was a new release of the server software ImageMagick, and same thing for the library External ImageMagick. From this update on, by default, the library would create thumbnails only for image files.

There is a setting that could activate the thumbnail creation for other files such as pdf, but only those who  can manage their server can do it.

I can't. My sites are on shared hosting. Or on a hosting I cannot manage myself.

At Ionos, where the library is External ImageMagick, I asked the manager to enable the option for pdf. They refused.

At OVH, where my sites are on a dedicated server, but I am not the manager, I asked the manager to modify the settings. There, it is Imagemagicks (not external). He did modify the settings, but to no avail. I still could not have my pdf thumbnails created.

In our historical society, we provide about 500 pdf. I needed a solution.

So I started making my pdf thumbnails.
For this I use on my computer the last free release of PDF-XChange Viewer,  v.2.5.322.10 which is no longer developed but perfectly functional and, above all, keeps a measured weight. There is an option when viewing a pdf to export the displayed page to an image file. In a click, it's done.
https://www.tracker-software.com/downlo … bc74b02340

Then, in the Piwigo, I installed the Photo Update plugin which create a new tab in the photo edition.

Each time I upload a PDF, I edit it immediately and with the Photo Update tab, I upload then its thumbnail.
https://piwigo.org/ext/extension_view.php?eid=566

TOnin, your instructions are not suitable for my intellectual capacities. I am not a computer scientist, I never work with command lines. My knowledge is very basic and I use the simplest techniques: I always upload my documents through the Piwigo administration interface, never through ftp and never through a third party application.

I don't understand what you want to do with "automatically generate all pdf from a gallery."

I wasn't trying to create a pdf from an album, I was trying to create a thumbnail of a pdf.

Sorry TOnin if I seemed to speak a bit curtly. I'm an exclusive windowsian, a literary person and on top of all that, a girl. Add to that the fact that English is not my first language, I was under the impression that you were speaking Klingon, in another universe, about another project.