Bug 146489

Summary: Converting Jpeg to PNG: Meta data lost
Product: [Applications] digikam Reporter: Martin Schmettow <schmettow>
Component: Plugin-Bqm-ConvertAssignee: Digikam Developers <digikam-bugs-null>
Status: RESOLVED NOT A BUG    
Severity: normal CC: caulier.gilles
Priority: NOR    
Version: unspecified   
Target Milestone: ---   
Platform: unspecified   
OS: Linux   
Latest Commit: Version Fixed In: 7.6.0

Description Martin Schmettow 2007-06-07 14:50:13 UTC 
Version:           0.9.2-beta3 (using KDE 3.5.6, Kubuntu (feisty) 4:3.5.6-0ubuntu14)
Compiler:          Target: i486-linux-gnu
OS:                Linux (i686) release 2.6.20-16-generic

When batch converting images from Jpeg (original from camera) to PNG with "Tools->Batch process->Convert Images" metadata isn't transferred to the PNG (thus lost completely). 
Recently I was informed that with current digikam I should prefer PNG to Tiff in order to conserve metadata, so I expected this to work properly.
Comment 1 caulier.gilles 2007-06-07 15:23:04 UTC 
This tool is a kipi-plugins with use ImageMagick 'convert' command line tool

Gilles
Comment 2 caulier.gilles 2007-06-07 15:23:52 UTC 
Witch kipi-plugins you use ?
Witch ImageMagick version you have installed ?

Gilles Caulier
Comment 3 caulier.gilles 2007-06-07 15:26:04 UTC 
To try to reproduce the problem, you can use this command line on a console :

#convert foo.jpg foo.png

And after with digiKam, take a look if metadata are available in foo.png

Note : try too :

#convert foo.png foo2.jpg 

... normally you will see the same metadata between foo.jpg and foo2.jpg

Gilles
Comment 4 Martin Schmettow 2007-06-07 16:14:22 UTC 
Sorry, I can't reproduce this any longer. Metadata is transferred now. Only thing that happened meanwhile is that I've opened and saved each image in the editor (adjusting white balance). Maybe this problem only appears with images fresh from the camera? I'm going to check that later.
Comment 5 Martin Schmettow 2007-06-07 20:43:26 UTC 
It's strange, but true. Batch converting looses metadata with images fresh from the camera. Opening and saving an image with the editor before converting makes a difference. Same happens with ImagaMagicks convert, so it's obviously an ImageMagick issue. Can someone give me a hint where I should report this.
Comment 6 caulier.gilles 2007-09-25 15:35:14 UTC 
Martin make a file report in ImageMagick bugzilla. Nothing can be done here.

Gilles Caulier