Bug #47807 for Image-ExifTool: Makernotes items shifted after copy

Sun Jul 12 07:13:34 2009 mail [...] fackelnet.de - Ticket created

Subject:	Makernotes items shifted after copy
Date:	Sun, 12 Jul 2009 12:45:23 +0200
To:	bug-Image-ExifTool [...] rt.cpan.org
From:	mail [...] fackelnet.de

Hello Phil I stumbled over an issue while using your nice exiftool command line application. After copying the metadata from JPG to DNG with the following command (exiftool 7.82, Windows XP) exiftool -ext dng -tagsFromFile %d%f.jpg -r -P -overwrite_original . the values of some items in the maker notes of the resulting DNG file are sort of shifted by one item "position". Just compare the attached screenshots dng-copied-makernotes.png (target) with jpg-makernotes.png (source). You can find a complete package with the image files at http://www.fackelnet.de/exiftool/ff-data.zip (13 MBytes) The images are from a Leica M8.2. Regards and thanks for all of your efforts in creating exiftool Franz -- Franz Fackelmann Mannheim, Germany

Download jpg-makernotes.png
image/png 6.5k

Download dng-copied-makernotes.png
image/png 7.8k

Mon Jul 13 10:03:32 2009 EXIFTOOL [...] cpan.org - Correspondence added 150 min

Thanks for this very complete bug report. I should have guessed that this Leica quick would bite me at some point: The problem stems from the fact that Leica uses a different base for the makernote offsets in JPEG and DNG images. I was handling this by checking the file type and adjusting the base appropriately, but this strategy breaks down when the makernotes are copied from the JPEG to the DNG (and visa versa). I will fix this problem by adding a patch to exiftool 7.83 to use another technique to determine the proper offset base for these images. I hope to release this version later today. - Phil

Mon Jul 13 10:03:32 2009 The RT System itself - Status changed from 'new' to 'open'

Mon Jul 13 10:03:36 2009 EXIFTOOL [...] cpan.org - Given to EXIFTOOL

Mon Jul 13 10:05:18 2009 EXIFTOOL [...] cpan.org - Correspondence added

On Mon Jul 13 10:03:32 2009, EXIFTOOL wrote: Show quoted text

> I should have guessed that this Leica quick [...]

That should read "quirk", not "quick".

Tue Aug 18 13:29:39 2009 EXIFTOOL [...] cpan.org - Status changed from 'open' to 'resolved'

Tue Aug 18 13:29:40 2009 EXIFTOOL [...] cpan.org - Fixed in 7.88 added

Tue Aug 18 13:29:40 2009 EXIFTOOL [...] cpan.org - Severity Normal added