Hi Hrvoje

Thanks for pointing it out. 
The behavior of 00:00 track length is because of Strigi in Nepomuk.
Strigi was not able to extract the length information from the music tracks. 

But fortunately, Vishesh Handa has been developing a new Nepomuk without using Strigi. You can read about it here - http://vhanda.in/blog/2012/11/nepomuk-without-strigi/

And Nepomuk will be using taglib in this next version and you can find adequate metadata then.

Will be fixed with Nepomuk2.

Phalgun, thanks for a fast response. I am aware of the new Indexer's, and i'm in fact using them, so i'm not sure how to interpret your comment 1.

Yes, I'm in the process of porting the plugin to Nepomuk2 ( the new Nepomuk version )

When I'm done with that, the audio metadata would be fetched using taglib. And subsequently, the collection metadata would look complete like the current SQL collection. 

Changing the status to verified as this bug needs to be worked on, hopefully before the plugin ships. 

Lastly, thanks for trying out the Nepomuk plugin.

(In reply to comment #4)
> Yes, I'm in the process of porting the plugin to Nepomuk2 ( the new Nepomuk
> version )
Cool, didn't understood that the first time.

> When I'm done with that, the audio metadata would be fetched using taglib.
> And subsequently, the collection metadata would look complete like the
> current SQL collection. 
> 
> Changing the status to verified as this bug needs to be worked on, hopefully
> before the plugin ships. 
If i can test, just let me know here, i'll be happy to do so :-)

> Lastly, thanks for trying out the Nepomuk plugin.
Thanks for coding it :-)

Is this bug still supposed to be present in KDE 4.10 RC3? Because it is on my Kubuntu 12.10 system.

@Michael, bug is for fixing on the Amarok side :-) see comment #4

*** Bug 314475 has been marked as a duplicate of this bug. ***

Seems to have nothing to do with Amarok, since even Dolphin shows incorrect track length in 4.10 final, using the new file indexer.

Created attachment 77532 [details]
Screenshot

(In reply to comment #9)
> Seems to have nothing to do with Amarok, since even Dolphin shows incorrect
> track length in 4.10 final, using the new file indexer.
Strange, as it works here, (screen attached)
Also, nfo:duration for that file is 213, which is also correct.
So, while nepomuk stores correct value, this rather seems like Amarok's bug.

Very strange. Looks like something's wrong with my setup. I purged some strigi packages. It's possible nepomuk was still using the strigi backend, I guess. I'll reindex.

(In reply to comment #11)
> Very strange. Looks like something's wrong with my setup. I purged some
> strigi packages. It's possible nepomuk was still using the strigi backend, I
> guess. I'll reindex.

Had the same issue Michal, I couldn't even seek through the songs as they were all 0:00 in length. I solved this problem like this:
1 - Disable the Nepomuk plugin
2 - Restart amarok
3 - Enable the Nepomuk plugin
4 - Restart amarok

And there you have it: correct lenghts :-)

Can you please check if this solves  your issue and we can mark the bug as "Solved"?

I must apologize. It seems I was too quick to say the issue was solved for me.

The behavior is as follows:
1 - Add any track to the playlist from the Nepomuk collection: no track length and no album art
2 - Restart amarok and the tracks you added before now are shown with both the album art and the proper track length

The strange thing is that if you try to add them again from the Nepomuk collection they won't show the proper information.

Can anyone confirm this?