[Digikam-devel] [digikam] [Bug 338081] Support HDR DNG images from HDRMerge

[DrSlony]

https://bugs.kde.org/show_bug.cgi?id=338081

DrSlony <bugs at londonlight.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|UPSTREAM                    |---
             Status|RESOLVED                    |UNCONFIRMED

--- Comment #8 from DrSlony <bugs at londonlight.org> ---
LibRaw refuse to support even simple extraction of the embedded JPEG thumbnail.
I can already extract BOTH preview images from that DNG using exiv2-0.24.
Preview-2 is large, preview-1 is small, thumbnail-sized in fact (256x172). It
could be used for the thumbnail in digiKam.

exiv2 -ep1 hdrmerge_045.dng

To reiterate:
1- digiKam already shows the large preview when you click on the thumbnail, but
it shows no thumbnail.
2- exiv2 can extract both previews,
3- so you could use it to get the small preview for the thumbnail.

I removed the "resolved - upstream" status as one upstream refused to do
anything (libraw), and the other already supports it (exiv2). So now it's up to
digiKam to make use of exiv2's ability to get the thumb.

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