[Digikam-devel] video metadata support: req. guidance

[Gilles Caulier]

2007/12/14, Loïc Brarda <loic.brarda21 at fnac.net>:
>
> 2007/12/13, Gilles Caulier <caulier.gilles at gmail.com>:
> > digKam already use KMetadata (and Exiv2 but only for photo). If i
> rememeber,
> > KMatadata can parse few video formats to handle metadata entries. We
> just
> > need to take a look into KMetadata code to learn how to use API.
> KMetadata
> > use kfile-plugins to supports video format (and images format)
> >
> > http://websvn.kde.org/branches/KDE/3.5/kdemultimedia/kfile-plugins/
> >
> >  In digikam, we have a class to get metadata: DMetadata. This one is
> used to
> > load informations from files to database :
> >
> >
> http://websvn.kde.org/branches/extragear/kde3/graphics/digikam/libs/dmetadata/
> >
>
> I don't see any kfile-plugin there. For me, it first tries to load
> metadata through Exiv2 then if it fails, it tries to use DCraw. Adding
> kfile-plugin when DCraw fails could be a non invasive and extensible
> way to do it (On supported files, Exiv2 will probably always be more
> complete than kfile-plugins).
>
> bool DMetadata::load(const QString& filePath)
> {
>     // In first, we trying to get metadata using Exiv2,
>     // else we will use dcraw to extract minimal information.
>
>     if (!KExiv2::load(filePath))
>     {
>         if (!loadUsingDcraw(filePath))
> ->     {
> ->          if (!loadUsingKfilePlugins(filePath))
>                 return false;
> ->       }
>     }
>
>     return true;
> }
>
> '->' lines beeing lines inserted in the load method. And of course,
> loadUsingKfilePlugins function has to be implemented.


There is no KMetadata in DMetadata class, but in image properties panel :

http://websvn.kde.org/branches/extragear/kde3/graphics/digikam/libs/imageproperties/imagepropertiestab.cpp?revision=670778&view=markup

... where KFileMetaInfo is called ...

Gilles




Cheers,
>   Loïc
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