I would like to generate camera raw file thumbnails (Nikon .NEF) in Nautilus with gThumb, without opening the app, and when no additional thumbnailer is installed. Some script or a Terminal command, I guess.
When a folder with pictures is opened in gThumb's folders browser it generates thumbnails in /home/.thumbnails if the thumbnail for that file is not already there. Also, can it be done just by opening the folder with the raw files in Nautilus, as a thumbnailer would do it?
For the moment gnome-raw-thumbnailer and ufraw-batch are buggy for 18.04, gdk-pixbuf-thumbnailer generates low-quality thumbnails for raw files, so I'm not using any of them. Thanks!