I don't want my original images to be modified: I want the image and metadata edits to be stored separately. When I used the phrase "non destructive" I should have probably used something like "non-modifying" instead.
I've worked on image handling software and am familiar with JFIF and JPEG etc. I appreciate that IPCT metadata goes in app13, which is separate from the image data. Heck, you can even add keywords and other metadata directly from your OS. So saving the ”metadata” is still non destructive for the actual photo side of things. > IPCT data lives in adifferent datablock than the pixels. Does anyone know of anything that already does this? I'm pretty sure I could extract it, but it's work I'd rather avoid if tools are already available for this. From a bit of reading, Adobe basically store a fully-formed xmp data element in the database, but its a binary blob and compressed in a non-standard way. Has anyone been down this route, and/or have any thoughts about options for successfully migrating?īeing a software dev, and knowing that the Lightroom catalogue is just a Sqlite database, one option is my writing some code to generate xmp sidecars for my jpegs using data in the database. My main concern is manually-entered captions and geolocation metadata - of which I have quite a lot. I appreciate that editing and filtering settings are unlikely to carry across to Darktable with anything like full fidelity, and I'm ok with that.
I'm not keen on this as most of my photos are non-raw and modifying them breaks the whole non-destructive editing premise of Lightroom - even if it is to migrate off it. However it seems that LR only generates sidecars for raw files, and for jpegs etc it writes IPCT metadata directly to the source image file. My understanding is that the best migration path is to generate XML sidecars using Lightroom, and then inhale these into Darktable. But I still want something with Lightroom-like features for more occasional use, so I'm looking at Darktable. I find that I'm not using Lightroom sufficiently often to justify the cost - and I basically don't use any of the other bundled stuff.
I'm on the Adobe photography plan and am looking to get off it.
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