UFRaw registers itself as a thumbnailer application for integration in GNOME and MATE desktop applications like Nautilus or Caja. This happens in generate_schemas.sh.
At the moment UFRaw uses the deprecated gconf instead of preferred dconf. UFRaw it the only application in my Gentoo system which still has a dependency to gconf. Please migrate to dconf, so that I can get rid of gconf at all.
The schemas are org.gnome.desktop.thumbnailers and org.mate.desktop.thumbnailers.
Thank you!
Correction: The schema for MATE is org.mate.thumbnailers (without "desktop") and it seems that dconf only allows to DIS-able thumbnailers, but not to register them.
Also the referenced link to rawthumb is outdated and does not work anymore. Registering should be done with [Thumbnailer Entry]
Thank you in advance.
Last edit: Marius Spix 2017-02-26
I created a new release with is now independent of gconf (see attachment)
./configure --enable-mime
make && make install
nautilus -q (on MATE: caja -q)
I also fixed the missing MIME type image/x-panasonic-raw2 (with the a) and added some other missing MIME types (see https://askubuntu.com/questions/283072 for reference)
Check https://rawsamples.ch/index.php/en/epson for sample files.
Enjoy!
Last edit: Marius Spix 2017-02-26
Note @gentoo-packagers: Please also remember to remove the gconf dependency from the ebuild.