gsettings-desktop-schemas 3.0.0-0ubuntu1 fails to create thumbnailers schema directory /usr/share/thumbnailers and necessary files within

I have just tested a brand new installation of stock Natty (using Unity and without the Gnome3 ppa).
Thumbnails work properly in the stock Natty version of Nautilus (2.32.2.1-0ubuntu13) and Evince (2.32.2.0-0ubuntu12).
So, this 'bug' probably doesn't impact on the Natty release.
However, it may cause problems in Nautilus and Evince get upgraded to 'version 3' in the future and it will almost certainly cause problems when the Gnome3 ppa is integrated in to the Ubuntu repos (which is my hope). I'm a big fan of choice when it comes to the desktop environment on Ubuntu (although I respect that this might be a contentious issue).
:)
All the best,
Daniel (Walker Street)

The .desktop extension dont work.

For resolve the problem use .thumbnailer extension with the different mime/type content.

For example, for ogg perview :

1 - Create the file :

     /usr/share/thumbnailers/ogg-thumbnailer.thumbnailer

2 - Put the content :

      [Thumbnailer Entry]
      Exec=/usr/bin/totem-video-thumbnailer -s %s %u %o
      MimeType=application/ogg;application/x-ogg;video/ogg;

      Or if you have ffmpegthumbnailer installed put the content :

      [Thumbnailer Entry]
      Exec=/usr/bin/ffmpegthumbnailer -f -s %s -i %i -o %o
      MimeType=application/ogg;application/x-ogg;video/ogg;

Create other files for all mime/type perview you want.

Oops was not %u but %i in line : Exec=/usr/bin/totem-video-thumbnailer -s %s %u %o

So the correct line is : Exec=/usr/bin/totem-video-thumbnailer -s %s %i %o

Thanks D-dref,
I think our solutions tie in well together.

Not really in fact...

Your solution generate only PDF by the evince-thumbnailer.thumbnailer file. Other files do nothing (in my computeur and other anyway)

If you have thunar-thumbnailer & ffmpegthumailer all is generate (all i need anaway).

Files to create are :

File :
     /usr/share/thumbnailers/evince-thumbnailer.thumbnailer
Content :
    [Thumbnailer Entry]
   TryExec=/usr/bin/evince-thumbnailer
   Exec=/usr/bin/evince-thumbnailer -s %s %u %o
   MimeType=application/pdf;application/x-pdf;image/pdf;

File :
     /usr/share/thumbnailers/psd-thumbnailer.thumbnailer
Content :
     [Thumbnailer Entry]
     Exec=/usr/lib/thunar-thumbnailers/psd-thumbnailer %i %o %s
     MimeType=image/x-psd;image/vnd.adobe.photoshop;

File :
     /usr/share/thumbnailers/xcf-thumbnailer.thumbnailer
Content :
     [Thumbnailer Entry]
     Exec=/usr/lib/thunar-thumbnailers/xcf-thumbnailer %i %o %s
     MimeType=image/x-xcf;

File :
     /usr/share/thumbnailers/videos-thumbnailer.thumbnailer
Content :
     [Thumbnailer Entry]
     Exec=/usr/bin/ffmpegthumbnailer -f -s %s -i %i -o %o
     MimeType=application/ogg;application/x-ogg;video/ogg;video/x-ogg;application/mp4;application/x-mp4;video/mp4;video/xmp4;application/flv;application/x-flv;video/flv;video/x-flv;application/webm;application/x-webm;video/webm;video/x-webm;application/msvideo;application/x-msvideo;video/msvideo;video/x-msvideo;application/3gpp;application/x-3gpp;video/3gpp;application/avi;application/x-avi;video/avi;video/x-avi;video/x-3gpp;video/vnd.divx

I see. You can get all the thumbnails you need with these 2 thumbnailers. I'd like to get the standard gnome thumbnailers (e.g. from Fedora) working.

Fedora 15 has a thumbnailer setup that is more true to Gnome. There are 3 thumbnailer files in /usr/share/thumbnailers in Fedora:
1. evince.thumbnailer (which is bigger than my files as it includes image viewing not just pdf)
2. gnome-font-viewer.thumbnailer (gnome-font-viewer is not available for Ubuntu though)
3. totem.thumbnailer (for media files)
I've attached file 1 and 3.

I can confirm that copying the Fedora thumbnailers (evince.thumbnailer and totem.thumbnailer) fixes thumbnails for pdf, avi and jpg files:
i.e. Download and extract the archive posted in the previous comment
sudo cp /home/username/thumbnailers/evince.thumbnailer /usr/share/thumbnailers/
sudo cp /home/username/thumbnailers/totem.thumbnailer /usr/share/thumbnailers/
sudo chmod -R 644 /usr/share/thumbnailers/*

Hello all, I have problem with the video thumbnail.

I create "videos-thumbnailer.thumbnailer" file in /usr/share/thumbnailers/, and add contents code, but the thumbnail only works localy.

Is it possible to create thumbnail in shared drive (samba) ?

Cordially.

Sorry I don't know if that's possible. I haven't got any samba shares.

As Fr_neo points out, the workaround thumbnailers do not work on NFS (Samba) drives. I can't tell if the thumbnailer is timing out or what, but it consumes the desktop for maybe fifteen to thirty seconds trying to make a thumbnail of each PDF file. If a directory is full of PDFs, the system slows to a crawl. Why does this not work for NFS-mounted directories?

Nevermind, the hanging of the system and failure to produce PDFs on NFS drives is due to bug #778638.

The directory already exist.