Re: [Tracker] Tracker creating multiple entries in Media Players

[Philip Van Hoof <philip codeminded be>]

Hi Benjamin,

Unfortunately you are out of luck (or you are lucky if you love 
programming the solution, as you will have to do this):

The version of Tracker on the N900 is really old. Many softwares running 
on the N900 are not compatible with more recent versions of Tracker.  
After the release of the N900 the Tracker team completely redesigned 
Tracker. This includes its client API (from a RDFQ API to a SPARQL based 
one).

No complete compatibility layer has been written (and the existing one 
would need to be completed to make more recent versions of Tracker run 
on a N900). The existing one is also no longer being shipped with 
Tracker. You need Tracker 0.8's versions to find its source code.

As many softwares running on the N900's Maemo Diablo are using the old 
API, you would need to implement this API using the new infrastructure 
(while keeping the ABI and API compatible, which basically means that 
you can't change the .h file while reimplementing the .c file):

https://git.gnome.org/browse/tracker/tree/src/libtracker?h=tracker-0.6

The new infrastructure can do more than the ancient release, so this 
isn't impossible. It's also not easy. During the 0.8 releases attempts 
where made to provide such a compatibility layer. Back then this was 
done for a Nautilus Tags plugin that was using the old API and could not 
be replaced/rewritten as new releases of Tracker happened (the ones 
which were a complete redesign of Tracker):

https://git.gnome.org/browse/tracker/tree/src/libtracker-client/tracker.c?h=tracker-0.8#n1500
https://git.gnome.org/browse/tracker/tree/src/libtracker-client/tracker.c?h=tracker-0.8#n1554
https://git.gnome.org/browse/tracker/tree/src/libtracker-client/tracker.c?h=tracker-0.8#n1614
https://git.gnome.org/browse/tracker/tree/src/libtracker-client/tracker.c?h=tracker-0.8#n1684

In theory those implementations should be sufficient to make a new 
Tracker work on a N900 Maemo Diablo. But this has never been tested (the 
compatibility layer wasn't made for a upgrade of the N900 Maemo Diablo's 
Tracker, but for the GNOME desktop and in particular just for the 
Nautilus plugin).

Doing all this would, however, be a really, really nice improvement for 
the N900's operating system to upgrade its Tracker to a modern version. 
Among other things you'll reduce battery consumption, fix hundreds of 
bugs and improve CPU and I/O utilisation. I'm pretty sure that the 
compatibility layer will also introduce bugs. So ..

Good luck!

Kind regards,

Philip


Benjamin Oppermann schreef op 6/10/2013 17:01:
> Following up:
> The current version of Tracker on Maemo 5 is 0.6.95-25maemo1+0m5, dated
> 2010-05-26
> details here: http://maemo.org/packages/view/tracker/
> Ben
>
>
> On Sun, Oct 6, 2013, at 03:33 AM, Benjamin Oppermann wrote:
> > Hello,
> > Tracker handles the indexing of media files in Maemo 5 on the Nokia N900
> > for use in the media player.
> > In said media player, a great percentage of my music tracks are
> > presented as duplicates, even though the files are present only once on
> > the device. In Maemo forums, three ideas are circulating about how to
> > handle this:
> > 1) tracker-processes -r
> > did not solve anything for me as the database was rebuilt with the same
> > fault again.
> > 2) touch name-of-duplicate-file
> > Is no good for me as the problem regards not just one file, but a couple
> > hundred or more - not all of them, but too many to do this manually for
> > each one.
> > 3) deleting the tracker folder (haven't tried that yet but looks to me
> > like it'd amount to the same effect as 1).
> >
> > Well I just wanted to hear what you guys think about it, maybe this has
> > been fixed in newer versions of tracker. Unfortunately I'm unable right
> > now to tell which version of Tracker is used in Maemo.
> >
> > Thanks,
> > Ben
> >
> > P.S. Here are the related threads in Maemo forums:
> > http://talk.maemo.org/showthread.php?p=1377437#post1377437
> > http://talk.maemo.org/showthread.php?t=76086
> >
> >
> > --
> >    
> >    bennypr0fane myopera com
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