Known Participant

P: Save JPG as DNG breaks maker notes

Forum|Forum|3 years ago
April 24, 2022
6 replies
4297 views

When saving a file that was originally a JPG to a DNG file, the camera maker notes are written incorrectly and have become corrupted.

Together with Phil Harvey (author of exiftool) I analysed the issue and we found that the makernotes are copied from an area in the original file that is off by 12 bytes; the maker note data is prefixed with 12 bytes (from other metadata tags) and the final 12 bytes are missing. This is problematic as my workflow uses information from the makernotes…

The problem has been around for a while and is still present in the latest verion of camera raw (14.3).

If you need, I can provide example files.

Hope you can fix this soon,
Hayo Baan

This topic has been closed for replies.

H

Hayo_BaanAuthor

Known Participant

Excellent: problem appears to be fixed!

Thanks 😀

Rikk Flohr_Photography

Community Manager

Greetings,

Updates to the Adobe Photography Products were released on June 13. The update contains a fix for this issue. Please download and the latest version of your application via the Adobe Creative Cloud Application or your respective device app store.

If you do not see the update (Mac and Win) you can refresh your Creative Cloud App with the keyboard shortcut [Ctrl/Cmd]+[Alt/Opt]+[ R ].

Note: App store availability can take several days for the update to appear and be available.

Thank you for your patience.

Rikk Flohr: Adobe Photography Org

Rikk Flohr_Photography

Community Manager

Setting status to investigating
Adding bug number

Rikk Flohr: Adobe Photography Org

Rikk Flohr_Photography

Community Manager

Greetings,

The Camera Raw team would like to obtain a sample JPEG file and DNG that exhibit the problem, can you supply a set of files for us to review?

Rikk Flohr: Adobe Photography Org

H

Hayo_BaanAuthor

Known Participant

Hi Rikk, sure I can. But actually any JPG with makernote data saved as DNG will do (e.g. from an iPhone).
I've uploaded a sample (both the JPG and the DNG) as well: https://we.tl/t-6zLOI7zGfK

H

Hayo_BaanAuthor

Known Participant

Why was this moved from BUGS to DISCUSSIONS? This IS a bug!

TheDigitalDog

Inspiring

I didn't move it.

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

H

Hayo_BaanAuthor

Known Participant

I didn't think you did, but it was moved nonetheless, hence my question...

TheDigitalDog

Inspiring

Gotta ask: Why would you save a JPEG inside the DNG container?

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

H

Hayo_BaanAuthor

Known Participant

Because then I can edit the JPG and treat the JPG as if it where a RAW file with all advantages that brings me (single file, non-destructive editing, etc.). Sure I could have saved it as a TIFF with a smart object, but my whole workflow is centered around (dng) raw files, so this is more convenient to me 😉

TheDigitalDog

Inspiring

No, you can't. It's just a JPEG inside the DNG container, it isn't any more 'raw' and of course, you could just continue parametric edits of the JPEG in either LR or ACR. Both products allow editing of the JPEG this way without any need to 'convert' (which is simply embedding) the JPEG into that container.

Embedding a JPEG into a DNG isn't doing anything useful; it is still a JPEG.

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

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