[Digikam-users] exiv2 and metadata for png

[Dick Angus]

On Thursday 02 April 2009 10:24:09 am Gilles Caulier wrote:
> 2009/4/2 Dick Angus <RJA-Linux at shaw.ca>:
> > am running Kubuntu 8.10, KDE 4.2.1, Digikam 0.10.0 (from Kubuntu
> > repositories), and exiv2 0.16 (from Kubuntu repositories). My photos are
> > stored in png format. Many photos have comments, tags, and such in the
> > database. I try to use the Album -> synchronize function and nothing
> > appears to happen. The metadata display on the right hand sidebar is
> > blank. I try to use the image -> metadata -> functions and everything
> > comes up as read-only. Have I got something set wrong or do I need to get
> > version 0.18 of the exiv2 software? From my research I thought exiv2
> > handled metadata edit for png from 0.16 or greater?
> >
> >
> > Here is the output from exiv2 -v image.png in a terminal for one of the
> > images:
> > File 1/1: Mike-0043.png
> > File name : Mike-0043.png
> > File size : 2931006 Bytes
> > MIME type : image/png
> > Image size : 1200 x 1800
> > Mike-0043.png: No Exif data found in the file
> >
> >
> > I thought the album -> synchronize function would copy the data;
> > comments, tags, and such, from the database into the exif/iptc/xmp data
> > of the photo file. I also looked at the iptc and xmp and it is read-only
> > as well. The metadata -> edit caption option does show the caption in
> > edit mode. I must have really misunderstood something about the metadata
> > and how to use it?
>
> To edit PNG metadata, you need
>
> 1/ Exiv2 >= 0.18
>
> 2/ libkexiv2 provided by KDE 4.2.2 (released today) where a bug have
> been fixed to be able to edit this metadata.
>
> Best
>
> Gilles Caulier
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Thanks for the quick response Gilles. I'll get exiv2 0.18 as soon as Kubuntu 
posts it to the repository.

An old mainframer getting current
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