[digikam] [Bug 381967] New: Some lens metadata lost in converting into DNG

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https://bugs.kde.org/show_bug.cgi?id=381967

            Bug ID: 381967
           Summary: Some lens metadata lost in converting into DNG
           Product: digikam
           Version: 5.2.0
          Platform: Other
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: BatchQueueManager-Tool-Convert
          Assignee: [hidden email]
          Reporter: [hidden email]
  Target Milestone: ---

Created attachment 106435
  --> https://bugs.kde.org/attachment.cgi?id=106435&action=edit
attach1

simular tiket: 255137

Hello,
After converting CR2 files into DNG, some metadata of lens are missing. It lost
Lens manufacture so automatic lens corretion tools can't choose right lens
automatically.

Please, pay attention to "Lens" in the file in attach. "Cannon " is missing in
DNG.
Thanks in advance.

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Octopuss <[hidden email]> changed:

           What    |Removed                     |Added
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           Platform|Other                       |openSUSE RPMs

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           What    |Removed                     |Added
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                 CC|                            |[hidden email]
          Component|BatchQueueManager-Tool-Conv |BatchQueueManager-Tool-DngC
                   |ert                         |onverter

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--- Comment #1 from [hidden email] ---
The Lens description is given from Exiv2 from markernotes decoding. The
markenotes from Canon is copied as well in DNG, but for obscur reasons, Exiv2
do not decode this as with CR2 file.

I recommend to ask to Exiv2 team, by providing both CR2 and DNG files to
investigate.

In all cases, no DK code can be fixed to handle this metadata, as i know...

Gilles Caulier

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--- Comment #2 from Octopuss <[hidden email]> ---
Hi,

Sorry for delay. I can add an example RAW(CR2) and the resulting DNG with the
issue.
CR2: https://www.dropbox.com/s/y647nngjsonim5h/IMG_6963.CR2?dl=0
DNG: https://www.dropbox.com/s/ximzsacv82g9nz2/IMG_6963.dng?dl=0
Please, let me know when the files are not needed anymore.
Thanks in advance.

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