Bug 282903 - Image corrupted after writing metadata due to sidecar XMP
Summary: Image corrupted after writing metadata due to sidecar XMP
Status: RESOLVED FIXED
Alias: None
Product: digikam
Classification: Applications
Component: Metadata-Sidecar (show other bugs)
Version: 2.1.1
Platform: Ubuntu Linux
: NOR normal
Target Milestone: ---
Assignee: Digikam Developers
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2011-09-27 12:33 UTC by Michal Thoma
Modified: 2012-06-27 07:37 UTC (History)
2 users (show)

See Also:
Latest Commit:
Version Fixed In: 2.6.0

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Description Michal Thoma 2011-09-27 12:33:52 UTC 
Version:           2.1.1 (using KDE 4.6.2) 
OS:                Linux

I have a RAW (PEF) file with accompanied XMP, created by digikam 2.0 before - I stopped writing metadata to XMP and reverted to writing metadata to image directly. I still want to Read Metadata from XMP so I also have ticked this.

Now when I change metadata like rating in any Image which has accompanied XMP, file get corrupted after that.

When the option Read Metadata from XMP is not selected, corruption will not happen.

Reproducible: Always

Steps to Reproduce:
1. In Preferences Metadata tab choose Write Metadata to XMP sicar only. 
2. Change Rating or other metadata of the image.
3. In Prefernces Metadata tab choose Write Metadata to image files only. Also tick Read Metadata from XMP option.
4. Change some image metadata then.



Actual Results:  
Image is corrupted and can't be viewed in digikam or other app.

Expected Results:  
Image metadata will be changed and data which were in XMP will be appended or used without corrupting the image.

Sample files (original image with xmp and corrupted image) are for download here:

http://download.thoma.cz/digikam-xmp-corruption.zip
Comment 1 Marcel Wiesweg 2011-10-29 15:08:01 UTC 
What is your exiv2 and libkexiv2 version? Go to Help/Components for this info.
Comment 2 Marcel Wiesweg 2011-10-29 15:10:58 UTC 
It seems the corrupted image contains only the metadata from the sidecar, the original image's metadata seems to be lost. I believe there are quite a few related bugs.
Nonetheless, I dont know why the image cannot be opened anymore. Any ideas where the problem in the file structure can be found?
Comment 3 Michal Thoma 2011-11-08 08:10:14 UTC 
My LibExiv2 is 0.21.1 and LibKExiv 2.0.0
Comment 4 Marcel Wiesweg 2012-03-15 20:59:52 UTC 
With the sidecar fixes applied for next digikam 2.6, current exiv2 and libkexiv2, I could successfully edit the image's metadata without creating corruption.