[Digikam-users] Re: documentation - where are the thumbnails?

[Gilles Caulier]

2011/1/5 Elle Stone <l.elle.stone at gmail.com>

>
> Hi, All,
>
> I've been going through the digikam documentation - the online html (which
> seems to match the downloadable pdf - yes? are they in sync?). The
> documentation says
>
> "digiKam follows the freedesktop.org standards for thumbnail folders
> (
> http://docs.kde.org/development/en/extragear-graphics/digikam/using-firstrun.html
> )".
>

This is not true from digiKam 1.x. The reason is optimize space used on
disk. PNG compress is not the best.

As you said below, PGF format is used instead and all data are stored in a
sqlite database file. The compression ratio can be between 2 to 5. For 100
items, the gain is not to huge, but imagine for 100.000 items. It's not
negligible.

Using this way, we can also ref all items hosted on a removable media.

Gilles Caulier


>
> The link to freedesktop.org doesn't actually lead to information about
> where
> the thumbnails are stored. I'm guessing "/home/username/.thumbnails" is the
> actual "standard" (freedesktop denies setting standards) thumbnail
> location.
> But I think really digikam now stores thumbnails in its database?
>
> "digiKam use a new database to cache thumbnails instead ~./thumbnails. File
> format used to store image is PGF (http://www.libpgf.org). PGF is a
> wavelets
> based image compression format and give space optimizations
> (http://www.digikam.org/drupal/node/477)".
>
> Or does "thumbnails-digikam.db" only store references to the thumbnails,
> which are actually stored somewhere else?
> --
> View this message in context:
> http://digikam.1695700.n4.nabble.com/documentation-where-are-the-thumbnails-tp3175896p3175896.html
> Sent from the digikam-users mailing list archive at Nabble.com.
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