Save metadata to (DNG) file: are ALL settings of LR saved?

Explorer ,
Dec 05, 2021 Dec 05, 2021

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Hi,

just 2 questions to be sure:

  1. are  there any informations of LR that I assign to a DNG file, that cannot be stored in the metadata when I save metadata to the file?
  2. The option for DNG files "Update DNG Previews & Metadata" does exactly the same, but additionally updates the preview?

 

Thanks!

mycc

 

 

From https://helpx.adobe.com/lightroom-classic/help/metadata-basics-actions.html:
Save metadata changes

  1. To manually save metadata changes to a photo in Lightroom Classic, do one of the following:Select one or more photos in the Grid view of the Library module and choose Metadata > Save Metadata To File(s), or press Ctrl+S (Windows) or Command+S (Mac OS).
  2. If you’re working with a DNG file, choose Metadata > Update DNG Previews & Metadata to save metadata changes to the file and also generate a preview based on the current raw processing settings.
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LEGEND ,
Dec 05, 2021 Dec 05, 2021

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There's a lot of stuff that is not save to xmp. A partial list (I'm sure there are more):

 

  • collection membership
  • sequence of edits
  • pick flags
  • virtual copies
  • Lightroom Classic slide shows
  • Lightroom Classic books
  • Lightroom Classic web-pages

 

Which brings up the question: Why do you ask? If you are thinking that you can make backups using xmp, these would only be a partial backup, all the information above (and probably other information) isn't stored in xmp.

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Adobe Community Professional ,
Dec 05, 2021 Dec 05, 2021

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The default function of Lightroom is to read and write info to the Catalog File. When you initially import image files to Lightroom Classic it will read info from the file or sidecar file. Thereafter while you are working with Lightroom as far as Lightroom is concerned the info is in the Catalog and it reads and writes to the Catalog file automatically.

There is also an option to have Lightroom write info to the file automatically or manually which serves the purpose of making the metadata and edits done in Lightroom shared with Adobe Camera raw and some other editing programs. However Lightroom has to be manually prompted to read metadata from the file.

You need to be aware prompting Lightroom to read metadata from the file can cause edits and other metadata to be altered in the Lightroom Catalog.

 

Regards, Denis: iMac mid-2015, 5K 27”, GPU 2GB, Ram 24GB, HDD 3TB, macOS 11.6.8,; LrC 11.4.1, Lr 5.4.1, Ps 23.3.2-ACR 14.4,; Camera OM-D E-M1.

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Adobe Community Professional ,
Dec 05, 2021 Dec 05, 2021

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The DNG can also contain all the rendering instructions that you want  it to, as long as they can be expressed and saved out as XMP data. A rendered JPEG (size you can control) can be saved too. Ditto AFAIK with all the 'data' you can save in a TIFF or rendered image like ratings, keywords etc.


Author “Color Management for Photographers" & "Photoshop CC Color Management/pluralsight"

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