Lightroom: Embedded preview image in converted DNG is "developed" not the original

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  • Updated 4 years ago
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If I convert an RW2 with Develop settings to a DNG then the "Before" image in Develop is the image as it was when it was converted to a DNG, and not the original image. The settings aren't baked into the DNG (they can still be altered) but it's impossible to view the original image without zeroise-ing. I suspect that the embedded preview image is rendered with the Develop settings. This problem is preventing me from converting my library from RW2 to DNG.
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Michael Stickland

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Posted 5 years ago

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Rob Cole

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One way to solve your problem:

0. disable auto-saving of (xmp) metadata.
1. save metadata manually - current settings/metadata written to xmp sidecars.
2. reset your photos (zeroize settings in catalog, xmp unaltered).
3. convert to dng (Lr will use zeroized catalog settings, not settings in xmp, for preview..).
4. read (xmp) metadata to restore previous settings. - it is not widely known, but Lr will read settings in DNG sidecar if they seem to be newer than embedded xmp.

If #4 doesn't work, then do this and retry (then it should work for sure):
3.5. touch all xmp files (how to do that depends on OS).

As always when doing this sorta thing - backup catalog and photos and xmp sidecars and everything else first, if you haven't already..

To be clear: the preview and initial conversion state will be that of Adobe default (your Lr defaults) - the original "out-of-camera" preview will no longer exist, except in the original proprietary raw files, or jpeg sidecar if you have it.