Derivative Images (module for Omeka S) (archived)
IMPORTANT: This module is now integrated in module Bulk Check and won‘t be updated any more.
Derivative Images is a module for Omeka S that allows to recreate all derivative files from the original media, if they are still available. It is useful when you change the parameters of the thumbnails, for example bigger or lower size, or when you add a new derivative type.
Uncompress files and rename module folder
See general end user documentation for Installing a module and follow the config instructions.
Because this is a tool that is rarely used, only the global admin can use it.
First, parameter your thumbnails in the file
Then, simply check the box in the config page of the module. The job is launched in the background.
When the process is ended (check the job log), the module can be uninstalled.
To create the image on the second page or any other next ones of pdf files, include this in the main config/local.config.php of Omeka (see #4):
'thumbnailer_options' => [ 'imagemagick_dir' => null, 'page' => 1, ],
You can find missing derivative files and files that don't exist in database with the module Bulk Check.
- Add options to select all thumbnails or only missing ones, all types of thumbnails or not.
- Manage creation of thumbnails for media without original (youtube…).
Use it at your own risk.
It’s always recommended to backup your files and your databases and to check your archives regularly so you can roll back if needed.
See online issues on the module issues page.
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- Copyright Daniel Berthereau, 2018-2020