http://130.15.24.88/~phil/tmp/SamsungNX2000.srw
http://130.15.24.88/~phil/tmp/SamsungNX300.srw
http://130.15.24.88/~phil/tmp/SamsungNX30.srw
Also, the following image is not recognized by the converter after a similar edit with ExifTool:
http://130.15.24.88/~phil/tmp/SamsungEK-GN120.srw
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Posted 4 years ago
Steve Sprengel, Champion
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These particular raw files also don't work in Lightroom or the Adobe Camera Raw plug-in for Photoshop.
That ExifTool can be told to do things to a raw file that make it unrecognizable to Adobe products isn't necessarily a bug in either set of programs.
For diagnostic purposes, it would be useful to have a pre-ExifTool version of the same raw files, as well as the ExifTool command line that was used to edit the raw files' metadata, so the situation can be replicated by others.
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http://130.15.24.88/~phil/tmp/SamsungNX2000_orig.srw
http://130.15.24.88/~phil/tmp/SamsungNX300_orig.srw
http://130.15.24.88/~phil/tmp/SamsungNX30_orig.srw
http://130.15.24.88/~phil/tmp/SamsungEK-GN120_orig.srw
And the ExifTool command was:
exiftool -artist=Phil FILE
where FILE is any of the original files.
- Phil
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- Phil
Chris Castleberry, Camera Raw Engineer
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I can reproduce this. We will investigate and follow up.
Thanks,
- Chris
Chris Castleberry, Camera Raw Engineer
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Chris Castleberry, Camera Raw Engineer
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Apologies for the delay.
As far as we have been able to determine, exiftool appears to be modifying the private MakerNote tag which causes Camera Raw to reject the files.
Can you confirm whether exiftool is inadvertently changing the MakerNote tag?
Thanks,
- Chris
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Chris Castleberry, Camera Raw Engineer
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Following is a note from my colleague who has been investigating this issue.
"...the original sample file shows MakerNote tag length is 268182 bytes. When I run exiftool on the sample file, the result has MakerNote tag length 268100, which is 82 bytes shorter. Furthermore, when I diff the contents of the MakerNote tags (before/after), I see very different values."
- Chris
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Thanks for replying.
Yes, your colleague is correct, but the maker notes are stored in a TIFF IFD format. The information is all still there if the IFD is parsed properly. You can't just look at the maker notes as a black box of binary data if you expect to extract information consistently. If you do this, then your code will easily break with camera firmware updates (among other things).
Chris Castleberry, Camera Raw Engineer
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Another bit of information from my colleague.
"That's not what we were told by Samsung.
The private MakerNote really is a binary blob and they gave us specific offsets to use to extract their data.
We've never had any problems with Samsung firmware updates.
External tools should never rearrange private MakerNote data for this reason."
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