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Exported DNG not showing thumbnails in Windows/10 but used to

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Califdan

Califdan

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Lightroom Version
12.2.1
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  1. Windows 10
Just got off session with a client (LrC 12.2.1) where we exported some images to his desktop as DNG and when we looked at his desktop it would not show an image thumbnail of the image and Windows Photos app would not open it. As a test I selected the desktop in the LrC import dialog and it did show a thumb nail for it

We re-exported the same images as Tiff's and they do show thumnails. Going back to the DNG's, I had "Embed Fast load data" checked but tried it again with that unchecked and same result. I also treid changing the JPG preview sizes and even tried selecting an earlier version of RAW. We then tried again after reverting to LrC 12.1. All with same result.

Here's what the desktop looks like
1679007439092.png


When we did this last month (2/16 to be exact), using the same Export Preset the problem did not exist. (E.G/, "Mayan Girl.dng" in screen shot)

At first I thought that the OS needed a CODEC installed to show dng's but other Dng's are showing so that's probably not the issue.

Any ideas appreciated.

Thanks -- Dan

Dan
 
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I suspect that his Export settings got changed to set JPEG preview to "None"
2023-03-16 20_54_48-Window.png
 
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Thanks Hal, but I checked that and it was set to "Medium". We also tried "Full Size" and it didn't help.
 
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Check that "Raw Image Extension" is installed in Microsoft Store. The old thumbnails might have been cached, giving the misleading impression that the problem is with the new files.
 
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