[Kde-imaging] [Bug 204437] DNGConverter turns olympus ORF unusable

[Gilles Caulier]

https://bugs.kde.org/show_bug.cgi?id=204437





--- Comment #38 from Gilles Caulier <caulier gilles gmail com>  2009-09-04 13:47:25 ---
Andreas,

I just created a test program to test makernote tag erase fonction. As
expected, it doesn't work, and i don't know why.

Program is there :

http://websvn.kde.org/trunk/KDE/kdegraphics/libs/libkexiv2/test/erasetag.cpp?view=markup

Executing test program give results below :

./erasetag.shell olympus.dng
main: Exif.OlympusIp.BlackLevel found =  true
main: Exif.OlympusIp.BlackLevel removed =  true
KExiv2Iface::KExiv2::save: File Extension:  "dng"  is supported for writing
mode
KExiv2Iface::KExiv2::save: Exif is supported for writing mode
KExiv2Iface::KExiv2::save: Exif is updated

You can see that Olympus makernote tag is removed in memory, but after when
exiv2::writeMetadata() is called in libkexiv2::save() method

http://lxr.kde.org/source/KDE/kdegraphics/libs/libkexiv2/libkexiv2/kexiv2.cpp#283

...DNG file still untouched (same size, same timestamp)

Note: if i set debug statement in this method, i can see that Exif data is set
to Exiv2::Image instance and exiv2::writeMetadata() is called properly.

Testing with Exiv2 0.18.2 command line tool using 

exiv2 -M"del Exif.OlympusIp.BlackLevel" olympus.dng

...work fine. Where is the problem ?

Gilles Caulier

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