Am Freitag, 11. März 2016, 16:40:51 schrieb Ralf Kerkhoff:
> Hi,

Hi,

> I have just switched from Lightroom to Darktable - because I have
> migrated my system to Ubuntu.
> 
> I have imported my images into Darktable which works fine  - especially
> that some basic development settings are taken from the xmp file.
> 
> What makes me wonder:
> The tags from the existing xmp file are available in Darktable - but
> not the title and description of the image.

The reason is that our Lr import code is less than stellar. It reimplements 
some code we already have elsewhere without actually supporting all the things 
it copies. So most of the metadata that we normally read from XMP files is 
ignored.
If anyone wants to fix that: use the stuff from exif.cc in lightroom.c.

[...]

> Is there a 'trick' to let Darktable read the title from the existing
> xmp ?
> Maybe I am doing something wrong?

It's not you. If you don't need the Lightroom processing being imported just 
rename your XMP files to have the file extension in its name, for example:

IMG_0001.CR2 + IMG_0001.XMP -> IMG_0001.CR2.XMP

Then the metadata, like title, gets read, but the Lightroom settings aren't. 
If you need both then you could try the following (make backups of the XMP 
files first): Copy the Lightroom XMP files to the dartable place, so you have 
two 
XMP files per image, one with the image file's extension in the filename, one 
without. Both files have the same content. Then import the images.  On import 
the file in the darktable location will be read and the metadata applied. Then 
when you open the image for the first time the Lightroom XMP will be read and 
the settings will be imported. Then you can delete the Lightroom XMP for that 
image. The downside is that you have to open every image in darkroom to have 
its settings being applied. Or alternatively, export all images once. 10x10 
pixels size is enough, with high quality export disabled in preferences. That 
should also makes darktable read the Lightroom XMP files. Thumbnails need to be 
regenerated but that's probably possible some way, too.

Caveat: I only tried that in a limited test right now, I can't promise that it 
works reliably. So better check some random samples before deleting the 
Lightroom XMPs.

> Cheers
> Ralf

Tobias

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