[Digikam-devel] [digikam] [Bug 331700] New: Some metadata are written with corrupted encoding of non-latin characters

[Michal Thoma]

https://bugs.kde.org/show_bug.cgi?id=331700

            Bug ID: 331700
           Summary: Some metadata are written with corrupted encoding of
                    non-latin characters
    Classification: Unclassified
           Product: digikam
           Version: 3.5.0
          Platform: Ubuntu Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: Metadata
          Assignee: digikam-devel at kde.org
          Reporter: michal at thoma.cz

I use XMP sidecar metadta for strorage and during copying, that some of this
metatada fails to support utf-8. Non-characters are changed into question
marks.

The tag affected is dc:description.

exif:UserComment and tiff:ImageDescription are written all right. Concerned
characters are of Czech alphabet like ěščřžů etc.

Find XMP sidecar below. It contain description "Hotel Paříž" which is rendered
in dc:description as "Hotel Pa?í?"

This affect interoperability with other software, because dc:description tag is
considered primary description field in some apps - especially exiftool. 

Reproducible: Always

Steps to Reproduce:
1. Write description containing non latin character.
2. At right panel look at XMP metadata and search for Dublin Core Description
tag. 
3. The non latin character are written wrongly.



<?xml version="1.0" encoding="UTF-8"?>
<x:xmpmeta xmlns:x="adobe:ns:meta/" x:xmptk="XMP Core 4.4.0-Exiv2">
 <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
  <rdf:Description rdf:about=""
    xmlns:xmp="http://ns.adobe.com/xap/1.0/"
    xmlns:MicrosoftPhoto="http://ns.microsoft.com/photo/1.0/"
    xmlns:exif="http://ns.adobe.com/exif/1.0/"
    xmlns:digiKam="http://www.digikam.org/ns/1.0/"
    xmlns:tiff="http://ns.adobe.com/tiff/1.0/"
    xmlns:dc="http://purl.org/dc/elements/1.1/"
   xmp:CreatorTool="digiKam-3.4.0"
   xmp:Rating="3"
   MicrosoftPhoto:Rating="50"
   exif:DateTimeOriginal="2014-03-01T17:14:53"
   exif:DateTimeDigitized="2014-03-01T17:14:53"
   exif:ExposureTime="1/200"
   exif:FNumber="90/10"
   exif:ExposureProgram="3"
   exif:ExposureBiasValue="0/10"
   exif:MeteringMode="2"
   exif:FocalLength="5500/100"
   exif:SensingMethod="2"
   exif:CFAPattern="0 2 0 2 2 1 1 0"
   exif:CustomRendered="0"
   exif:ExposureMode="0"
   exif:WhiteBalance="1"
   exif:FocalLengthIn35mmFilm="82"
   exif:SceneCaptureType="0"
   exif:Contrast="2"
   exif:Saturation="0"
   exif:Sharpness="2"
   exif:SubjectDistanceRange="3"
   exif:GPSVersionID="2.3.0.0"
   tiff:ImageWidth="4992"
   tiff:ImageLength="3284"
   tiff:Compression="65535"
   tiff:PhotometricInterpretation="32803"
   tiff:Orientation="8"
   tiff:SamplesPerPixel="1"
   tiff:PlanarConfiguration="1"
   tiff:XResolution="300/1"
   tiff:YResolution="300/1"
   tiff:ResolutionUnit="2"
   tiff:DateTime="2014-03-01T17:14:53"
   tiff:Make="PENTAX             "
   tiff:Model="PENTAX K-5         "
   tiff:Software="K-5 Ver 1.15           ">
   <exif:Flash
    exif:Fired="False"
    exif:Return="0"
    exif:Mode="2"
    exif:Function="False"
    exif:RedEyeMode="False"/>
   <exif:UserComment>
    <rdf:Alt>
     <rdf:li xml:lang="x-default">Hotel Paříž</rdf:li>
    </rdf:Alt>
   </exif:UserComment>
   <exif:ISOSpeedRatings>
    <rdf:Seq>
     <rdf:li>400</rdf:li>
    </rdf:Seq>
   </exif:ISOSpeedRatings>
   <digiKam:CaptionsAuthorNames>
    <rdf:Alt>
     <rdf:li xml:lang="x-default"/>
    </rdf:Alt>
   </digiKam:CaptionsAuthorNames>
   <digiKam:CaptionsDateTimeStamps>
    <rdf:Alt>
     <rdf:li xml:lang="x-default">2014-03-01T20:47:10</rdf:li>
    </rdf:Alt>
   </digiKam:CaptionsDateTimeStamps>
   <tiff:ImageDescription>
    <rdf:Alt>
     <rdf:li xml:lang="x-default">Hotel Paříž</rdf:li>
    </rdf:Alt>
   </tiff:ImageDescription>
   <tiff:BitsPerSample>
    <rdf:Seq>
     <rdf:li>14</rdf:li>
    </rdf:Seq>
   </tiff:BitsPerSample>
   <dc:creator>
    <rdf:Seq>
     <rdf:li>Michal Thoma</rdf:li>
    </rdf:Seq>
   </dc:creator>
   <dc:rights>
    <rdf:Alt>
     <rdf:li xml:lang="x-default">Michal Thoma</rdf:li>
    </rdf:Alt>
   </dc:rights>
   <dc:description>
    <rdf:Alt>
     <rdf:li xml:lang="x-default">Hotel Pa?í?</rdf:li>
    </rdf:Alt>
   </dc:description>
  </rdf:Description>
 </rdf:RDF>
</x:xmpmeta>

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