Lightroom was not designed to expect the extension change, and so I think you will have to do this manually one-by-one.
The "Read Metadata from Files" command can be done batch, by selecting all of the photos, and then issuing the "Read Metadata from Files" command.
(Illusion. Did not do the trick. : "I just tried one solution that works "individually" and should work in batch mode - I'll report back on that in an houer or so :-)
( The new Folder with the DNG-Files : Rename their extention to .jpg - "wrongly", as to trick LR into thinking it's ok to have fond the new location, and it batch re-links (to correct-files that have incorrect-extention. Than batch rename extention back to dng !
It works individually. Now I have to find a freeware that allows me to batch-rename (I had one once that allows this - outside of LR, in explorer). )" )
At least that way, re-assign the image remains matter of within the same folder.
that will thoreticall take me 80minutes, lets say two hoers of click-click-cklick - "because "LR was not designed to" allow to batch-find wrong extentions..
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Please- Try this (un-proven) method with ONE photo before committing to the 350 photos.
You will be converting the JPGs (in the Lr catalog) to a DNG , then replacing them with the original DNG files with the same filename.
- In Lightroom, select the 350 jpg photos
- Menu > Library > Convert to DNG. ( You will have to remove a check from "only Convert raw files")
- Click [OK]
- Close Lightroom
- Use Finder/Explorer to REPLACE the 350 files that Lightroom has in its catalog (now called xxx.DNG) with the 'Original' DNG files.
- Re-start Lightroom.
Thank You very Much !!
I had already gone troughit manually a full third but did all again Your way :-)
Thanks again !!!!