Exiv2 bug reports

[Gilles Caulier]

Hi Marcel,

This is a more simple solution, always based to C++ with ExifTool :

http://owl.phy.queensu.ca/~phil/cpp_exiftool/

This basis o this interface must do the job for all common call done by
digiKam in Exiv2. Of course the tags syntax must be ported from Exiv2 to
ExifTool.

The second problem is the Perl stuff.. Here, also there is a solution to
provide a machine compiled Exiftool in digiKam as a ressource. This will
improve very well the performances. As i can see, LightRoom use this
solution in background (yes I see Exiftool used while testing).

ExifTool.exe precompiled already exists for Windows for ex. So it's
possible to do for all platforms.

There is some reponse about this topic here :

http://stackoverflow.com/questions/1237286/how-can-i-compile-my-perl-script-so-it-can-be-executed-on-systems-without-perl-i

Gilles

2017-04-25 12:53 GMT+02:00 Marcel Wiesweg <marcel.wiesweg at gmx.de>:

> Gilles, just my viewpoint from someone who used to code a little bit at
> free
> time:
>
> Using an out-of-process solution like exiftool has the bonus that crashes
> dont
> crash digikam.
> It has the drawback of performance; metadata reading is quite expensive in
> some situations. Inter-process communication can be a pain.
>
> If it's based on Perl, this can be a problem for easy deploying on other
> platforms. And I dont know if you speak Perl really well.
>
> We have invested greatly in our exiv2-based infrastructure. There are
> hundreds
> of bug fixes and problem solutions in the code that depends directly on
> exiv2
> via C++.
>
> In order to port all this logic, and to optimize IPC, you'd need custom
> parts
> in the other process - probably written in Perl? - that need to be
> developed
> by digikam and kept up to date with digikam.
>
> In the end, make a calculation if all this work is really worth it.
>
>
> Marcel
>
> >
> > I seriously plan Exiftool migration. It will take a while but at least
> > Exiftool is alive and constructive... I'm in contact with Exiftool
> team...
> >
> > Voilà. This is just the viewpoint from an human who code a little bit at
> > free time...
>
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