[digiKam-users] Extract thumbnails from thumbnails-digikam.db

[Gilles Caulier]

I invite you to contribute to the github project where is store the PGF to
PNG converter. This is the right place to store extra scripts to extract
PGF blob from database.

Best regards

Gilles

Le mer. 9 juin 2021 à 12:45, Dmitri Popov <dmpop at tokyoma.de> a écrit :

> Sure thing! I'll ping you when the script is ready. Thanks, Gilles!
>
> Best,
> Dmitri
> ---
> Tōkyō Made - https://tokyoma.de/
>
> June 9, 2021 10:43 AM, "Gilles Caulier" <caulier.gilles at gmail.com> wrote:
>
> > Hi Dmitri,
> >
> > If you have a script to extract thumbnails as PGF blobs from digiKam
> database, we can share files
> > in my github project.
> >
> > Best
> >
> > Gilles
> > Le mer. 9 juin 2021 à 09:00, Dmitri Popov <dmpop at tokyoma.de> a écrit :
> >
> >> Thank you very much for your prompt reply, Gilles!
> >>
> >> Best,
> >> Dmitri
> >>
> >> June 8, 2021 6:36 PM, "Gilles Caulier" <caulier.gilles at gmail.com>
> wrote:
> >>
> >>> hi Dmitri,
> >>>
> >>> Hey no, it's not a JPEG image, it's PGF image image (using wavelets
> compression). It's better
> >> than
> >>> JPEG in speed, quality, and size.
> >>>
> >>> To convert this PGF t PNG for ex, use my CLI tool from my github
> account :
> >>>
> >>> https://github.com/cgilles/digikam-pgf-database
> >>>
> >>> Best regards
> >>>
> >>> Gilles Caulier
> >>> Le mar. 8 juin 2021 à 18:20, Dmitri Popov <dmpop at tokyoma.de> a écrit :
> >>>
> >>>> Hello,
> >>>>
> >>>> A technical question from someone who has no idea what he's doing.
> :-) I'm trying to exact a
> >>>> thumbnail directly from the thumbnails-digikam.db database, but this
> command gives me a file
> >> that
> >>>> is not recognized as JPEG:
> >>>>
> >>>> sqlite thumbnails-digikam.db "SELECT writefile('thumbnail.jpg', data)
> FROM Thumbnails WHERE
> >> id=1;"
> >>>>
> >>>> What am I doing wrong?
> >>>>
> >>>> Thank you!
> >>>>
> >>>> Kind regards,
> >>>> Dmitri
> >>>> ---
> >>>> Tōkyō Made - https://tokyoma.de/
>
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