Yes you can upload raw images besides jpeg ones. But as far as I know you cannot see raw images in a browser.

Anyway to upload raw images, you must change config through local/config/config.inc.php file by adding theses lines if the file already exist :

$conf['picture_ext'] = ['jpg', 'JPG', 'jpeg', 'JPEG', 'png', 'PNG', 'gif', 'GIF', 'rw2', 'RW2']; // my raw files have rw2 extension
$conf['upload_form_all_types'] = true;

If the local/config/config.inc.php does not exists you must create it with the following content :

<?php
$conf['picture_ext'] = ['jpg', 'JPG', 'jpeg', 'JPEG', 'png', 'PNG', 'gif', 'GIF', 'rw2', 'RW2']; // my raw files have rw2 extension
$conf['upload_form_all_types'] = true;

Hope it helps. Tell me if something is not clear enough.

Erik Umans wrote:

Hi Nicolas,

Thanks for your support.

you're welcome.

Erik Umans wrote:

I applied your changes in my Piwigo configuration. Now I can select raw image files for uploading.
But I can't find the raw files in the upload directory. Are these stored elsewhere?

The raw file is store is the same place (upload/YYYY/MM/DD/md5_file.rw2 for example) as the jpeg file.

Erik Umans wrote:

What I want to achieve is not only uploading raw but linking jpeg and raw.
Thereby using jpeg do represent the picture in piwigo, as by default.
When downloading, I would expect to have a choice to download the original jpeg or raw for editing.

Ok. I understand. I'm afraid you should make a small plugin to do that. Or, you can find one that do the job.