Rog131 <> changed:

           What    |Removed                     |Added
                 CC|                            |
          Component|view-engine: general        |default
           Assignee|   |
            Product|dolphin                     |kio-extras

--- Comment #1 from Rog131 <> ---
(In reply to David Tonhofer from comment #0)
> Created attachment 111812 [details]
> Example of failed previews
> If you upload an jpg image and Dolphin grabs it to generate a preview, it
> may stay "half gray" as the preview fails mid-way.
> This is not so bad, but Dolphin should be back later for a re-take on the
> preview - this does not happen (how do into explicitly telling Dolphin to
> redo the previews?)
> Fixing this would mean keeping a database about temporarily failed previews
> somewhere (a portable SQL database or something)

The Dolphin is using KDE KIO to create and manage the thumbnails. Resetting the
product to the kio-extras as the jpg thumbnailer is part of the kio-extras.

The KDE is following the Freedesktop standards and specifications. There is
Thumbnail Managing Standard:
. The standard has 'Thumbnail Creation Failures':
I'm not sure if the KDE has implement it ?

To redo the thumbnails the user can clean the thumbnail cache:

- Gwenview has this in the advanced settings.
- Sweeper ( ) has this
option - needs Git commit 9c9586579f6f0dc7c0db73cf7683e94ab61526d7 -

There is also an option to make a servicemenu to remove single thumbnails.

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