3/14/2023 0 Comments Darktable lightroom![]() When you create the XMP files in Lightroom it only writes XMP files for raw files.Here are some important undocumented things I discovered: The XMP files are text files and (presumably) are much easier to work with and they don't change. Adobe pretty regularly (every 2-3 years) changes the format of the catalog so if someone decodes it they have to keep decoding the new formats and updating the source code for the importer. It is understandable why the free darktable uses the XMP files rather than the catalog. On1, C1, and ACDSee use the Lightroom catalog for the migration which has the collection data too whereas darktable uses the optional XMP files for each individual image file which is generated by Lightroom (you can get them by selecting your images and then hitting Ctrl-S to get them written). With darktable you can get keywords (tags), star ratings, and color labels, but not collections. since the editing translation to a different program is so far from perfect. My feeling these days is if I switch away from Lightroom then I most care about getting my keywords (tags), star ratings, color labels, collections, etc. This is a very difficult thing to do and I no longer have any expectation that it is worthwhile to even do it to my photos. ![]() On1, C1, ACDSee, and probably others also try to import the editing data from Lightroom, but none are even close to perfect. So, for some people this is a reasonable solution, but it is not for me. And you have thrown away all the advantages of non-destructive editing. And besides the explosion of storage space you are still stuck with baked in editing, baked in color space, etc. And it turns my 3.85mb Olympus E-M10II 16mp JPEG file into an 83.5mb compressed 16-bit TIFF file. Some people suggest saving all the edited files to 16-bit TIFF files with the Lightroom editing baked in (sRGB or Adobe RGB or some other color space) which turns my 16.5mb Olympus PEN-F 20mp raw file into an 86mb compressed 16-bit TIFF file. On rare occasions I undo all the edits and start over, but mostly just a few changes to an already edited photo. I often go back to earlier edited photos and tweak them a bit. They all have keywords (tags), most have star ratings, many have color labels, many are in collections, etc. I have 112k photos in my Lightroom catalog: 110k out-of-camera originals + 2k scanned film files. I was using darktable 3.2.1 which was the release before the new 3.4.0 released a few days ago. I experimented with it this year by importing a few of my files along with their Lightroom XMP sidecar files to see what darktable would do. metadata (keywords (tags), star ratings, color labels, etc.).There are 2 different types of data to import: You can also read the 3.4 manual info about importing Lightroom XMP files here: Here is a 2013 article written by the developer about importing Lightroom XMP files along with image files into darktable: First, take a look at the following 2 links and then below you will see things I learned that are undocumented and I have never seen written about anywhere despite having searched, watching a couple of videos, etc. I will write about my experience playing around with the darktable import function that imports Lightroom XMP files along with images and tries to translate some of the data for use by darktable.
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