Question about sidecars

[noname at fastmail.net]

Hello Remko,

Thank you very much for your quick response. In thinking more about the .xmp files, I can easily understand--now--why the changes to the image can't be transferred between digiKam and darktable, and thumbnails can't be transferred, either.

Jay

On Sun, Oct 22, 2023, at 01:34, Remco Viëtor wrote:
> On dimanche 22 octobre 2023 01:52:36 CEST Jay wrote:
> > I'm using digiKam 8.0.0 and darktable 4.4.2 on Linux Mint 21.2.
> > 
> > I may have misunderstood the use of sidecars. I was expecting that a sidecar
> > created in darktable would be readable by digiKam to show the changes I
> > might have made in darktable and have them displayed in digiKam. And
> > vice-versa as well. However, I'm not seeing the changes I make to each raw
> > file in the other application, so think I may have misunderstood the
> > ability to interchange .xmp files.
> > 
> > I have set digiKam to read and write to .xmp files, and have also set
> > additional file extensions to RW2, my raw file extension.
> > 
> > Any assistance appreciated.
> > 
> > Jay Rutherford
> The sidecars from darktable can be read by digikam (I use that feature 
> myself). That said, reading an xmp file does not mean the reading program can 
> *use* the information... 
> 
> Digikam can use the keywords, captions, etc. written by darktable (and vice 
> versa). It cannot read the editing instructions from darktable. Some of 
> darktable's modules have no equivalent in digikam, and for others you cannot 
> be sure the parameters have the same meaning. 
> 
> Also, applications do not store a thumbnail in a sidecar file. So there is no 
> way to transfer an edit from one program to another through a sidecar file, 
> you will have to create an image file with the edits (export in darktable).
> 
> Nor is there an easy way to reuse the thumbnails from one program in the other 
> (they use a completely different image formats and thumbnail organisations).
> 
> Remco
> 
> 
> 
> 
> 
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