[Bug 1505014]

[Stéphane]

(In reply to Rog131 from comment #15)
> (In reply to Stéphane Tréboux from comment #14)
> > I just updated to KDE Applications 15.12. In the Dolphin preferences under
> > General -> Previews the following options are available and ticked:
> > - PS/PDF/DVI (provided by kdegraphics-thumbnailers 15.12.3)
> > - video files (provided by ffmpegthumbs 15.12.3)
> > Still no thumbnails are generated. Any idea what could be missing?
> 
> Distribution ?
> If Ubuntu then it is a packaging bug:
> https://www.kubuntuforums.net/showthread.php?69996-No-video-amp-pdf-files-
> preview-in-Dolphin-15-12-3&p=386740&viewfull=1#post386740
> Bug should be filed to the Launchpad:
> https://launchpad.net/ubuntu/+source/ffmpegthumbs/+bugs

Your guess is correct; the distribution is Kubuntu 16.04 LTS. Thanks for
the hint about the packaging bug. kdegraphics-thumbnailers is affected
too.

I filed two bugs in Launchpad.
ffmpegthumbs: https://bugs.launchpad.net/ubuntu/+source/ffmpegthumbs/+bug/1574037
kdegraphics-thumbnailers: https://bugs.launchpad.net/ubuntu/+source/kdegraphics-thumbnailers/+bug/1574049

Until the packages are fixed there is a workaround (I took it from kubuntuforums.net).
This command will link all the files from /usr/lib/x86_64-linux-gnu/plugins/ to /usr/lib/x86_64-linux-gnu/qt5/plugins/:
sudo ln -s /usr/lib/x86_64-linux-gnu/plugins/* /usr/lib/x86_64-linux-gnu/qt5/plugins/

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https://bugs.launchpad.net/bugs/1505014

Title:
  dolphin doesn't load video thumbnail services

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