https://bugs.kde.org/show_bug.cgi?id=420715

--- Comment #15 from caulier.gil...@gmail.com ---
Hi all,

Voilà, now digiKam use libheif to parse HEIF file metadata instead Exiv2. It
work like a charm here and image are not decoded to acheive this job. this will
populate the database as expected with Exif, Iptc, and Xmp.

Of course, HEIF metadata are available as read only for the moment. libheif is
not yet able to write metadata without to re-encode whole image file. There is
a report about this topic in libheif project. Please ping the developers to
look about this feature:

https://github.com/strukturag/libheif/issues/127

Other solution is to wait than Exiv2 project support officialy HEIF format. But
to be honest, lead coordinator become completely crazy about this topic. I
proposed more than time some patches about this feature, all have been banned
(closed), and no real code review have been done... This is not how open source
collaboration can be done safety for the future. I already write large code for
Exiv2 in the pass, i code since more than 35 years now, and i'm an active
open-source developer with digiKam since 18 years now : so i know the rules
about open source world...

To close this topic with Exiv2, i hate to read an amount of troll messages
about "possible" patents to parse HEIF data. I said to parse, not to
decode/encode X265 streams. Metadata are separated well from compressed data,
so it's a safe operation. And in all cases, if a possible patent exist about
HEIF parsing, well if we made the HEIF support as optional at configuration
time, this will fix definitively the problem at packaging time.

Gilles Caulier

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