Inspiring

Question

How export jpg from corrupt dng?

Forum|Forum|1 year ago
October 2, 2024
2 replies
489 views

Yeah, it seems like it should be easy... Windows 11, LR 13.5.1.

I have a dng file that Lightroom says is corrupt. And there appears no way to have Lightroom FIX the corruption, so I'd like to save the good-APPEARING jpeg from the file. The backup dng, created at the time the DNG was created with no error, is ALSO bad.

I've tried exporting it - and yes the file type is set to jpg - it fails.

I've tried doing it from Bridge - it fails.

I've even tried sending it as an email - it fails.

In Camera Raw I can SEE the embedded jpeg, but I can't find any way to EXTRACT the jpeg from there either.

How do I make Lightroom (or Bridge) give me the jpeg that's stuck in the corrupted DNG file as a full-sized jpeg?

Windows

This topic has been closed for replies.

Rob_Cullen

Community Expert

You might also try the Plugin to extract JPGs from Previews- IF you can see previews!.

Extract JPGs from Previews Plugin

I cannot say it will work.

And in worst scenario, if you can view previews in Loupe or Full-screen, do a screen-clip, using Windows Snipping Tool or an app like 'Greenshot'.

Regards. My System: Windows-11, Lightroom-Classic 15.0, Photoshop 27.0, ACR 18.0, Lightroom 9.0, Lr-iOS 10.4.0, Bridge 16.0 .

D

DavePinMinnAuthor

Inspiring

Thanks for the replies. In the end the plugin from Jeffrey Friedl wasn't useful as it only made very small extractions - the largest was about 1680 px.

Eventually, I did a brute force extraction, splitting the image into a series of layers and assembling them in Photoshop. They were saved as .png files, then put together as a panorama in Photoshop to give me TIF images in the 3700x4800 size range. They'll be fine for what I need.

These were older images that may have been converted during the period when it appears the DNG converter wasn't always perfect, so it's fortunate that only 2 of the thousands of images had problems. Hopefully.

D

DavePinMinnAuthor

Inspiring

In the end the plugin from Jeffrey Friedl wasn't useful as it only made very small extractions - the largest was about 1680 px.

That's what is is supposed to do, it extracts whatever preview LrC has created, in this case 1680px.

Then it worked perfectly...

D

dj_paige

Legend

LrC cannot perform any task on a corrupted file. There are third party utility programs which can extract JPG previews embedded in a RAW or DNG file. I have no idea if they will work on corrupted files.

The best solution is to restore a backup of the original DNG (or original RAW).

D

DavePinMinnAuthor

Inspiring

That would be good, but unfortunately, the original DNG is also corrupted. Interesting that Lightroom can display the jpeg preview, but can't export the embedded jpeg.

Sign up

To post, reply, or follow discussions, please sign in with your Adobe ID.

Sign in to Adobe Community

To post, reply, or follow discussions, please sign in with your Adobe ID.

Scanning file for viruses.

This file cannot be downloaded