[Digikam-devel] [digikam] [Bug 347737] Tagged RAW files do not show tags after round trip to RawTherapee

[Eric Mesa]

https://bugs.kde.org/show_bug.cgi?id=347737

--- Comment #24 from Eric Mesa <ericsbinaryworld at gmail.com> ---
(In reply to Gilles Caulier from comment #23)
> Alan,
> 
> > 1st: It has nothing to do with RawTherapee as the XMP data was written to
> > the Exif section of the CR2 image by libkexiv2 via digikam. RawTherapee
> > carried over that data unchanged to the JPG.
> 
> no. digiKam or libkexiv2 do not force to play directly with
> Exif.Image.XMLPacket. I just grep in code to see if Exif.Image.XMLPacket is
> used somewhere, and it appear only in digiKam tiff loader for image editor.
> This have nothing about this entry.
> 
> Typically, digiKam as to Exiv2 (through libkexiv2) to fill Exif, IPTC and
> XMP. Exiv2 must decide where tags must be handle (in this case at Exif, or
> Xmp section)
> 
> The CR2 Raw file can not store XMP value to a dedicated sub container
> (section, chunk) as it's do with JPEG or PNG. After all CR2 are TIFF, and
> there is not size limitation as JPEG to host data.
> 
> Gilles

Yes, but in this example the CR2 is a bit of a red herring as it's not working
on DNG either and that's supposed to work fine with XMP.

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