Re: [Tracker] Indexing RAW images files

[jamie <jamiemcc blueyonder co uk>]

On Wed, 2007-11-21 at 13:55 +0000, Erlend Davidson wrote:
> jamie wrote:
> > On Wed, 2007-11-21 at 07:36 +0100, Tommaso Schiavinotto wrote:
> >   
> > > I would like to report to the mailing list a critic enhancement
> > > for dealing with RAW images files.
> > >
> > > I filed a bug about this.
> > >
> > > I don't actually know if it is the indexing or the thumbnail creation,
> > > anyway having a lot of RAW images files from digital cameras, I got problems
> > > using tracker.
> > >
> > > Tracker uses a lot of memory and CPU to index (or thumbnail) RAW images.
> > >
> > > In fact using the 'convert' command by Imagemagick RAW images
> > > are indexed (or thumbnailed) through a delegate
> > > (/usr/lib/ImageMagick-6.2.4/config/delegates.xml in Gutsy Gibbon) that
> > > uses the
> > > following command line:
> > > dcraw -w -c
> > > Now this is useless both for indexing, since metadata should be
> > > extracted with:
> > > dcraw -i -v
> > > it does not need to decode the image and it's much faster.
> > > If you instead need a thumbnail using
> > > dcraw -e
> > > you can use the thumbnail inside the RAW file, with no need for decoding.
> > >
> > > In both cases it would be very fast and not memory demanding. To do this you
> > > should deal with RAW images as special cases and do not let convert deal
> > > with
> > > them.
> > >
> > >     
> >
> > thanks we will investigate doing this
> It's probably better to use libopenraw these days.  For one it's about 
> 100 times faster than dcraw, and it's easier to integrate into things 
> (it's a library).
>
> http://libopenraw.freedesktop.org/wiki/
>
> It should be possible to just read the metadata directly that way.


we can only use that if its in gutsy main repo (which I dont think it
is)

jamie