[Nepomuk] Music issues I want to fix

[Ignacio Serantes]

I brief update status.

1) I just fix multiple performers bug in flac analyzer.

2) nmm:albumArtist seems to be related to DB structure and is not a coding
bug. I just added nmm:albumArtist to SDO and now there is a nmm:albumArtist
in nmm:MusicAlbum. This is the code I added:
    nmm:albumArtist
    a rdf:Property, nrl:DefiningProperty ;
    rdfs:subPropertyOf nco:contributor ;
    rdfs:label "album artist" ;
    rdfs:comment "Album artist" ;
    rdfs:domain nmm:MusicAlbum ;
    rdfs:range nco:Contact .

I will upload a patch to Review Board for the first one but, what must I do
with the second one?

On Thu, Jun 7, 2012 at 7:59 PM, Ignacio Serantes <kde at aynoa.net> wrote:

> Hi,
>
> I detect next issues with music albums scanning flac and mp3 formats:
>
> 1) Performers:
>
>    - mp3: supports it but it wrongly adding nmm:albumArtist too and this
>    must be related to nmm:MusicAlbum.
>    - flac: only adds one performer, the last added to the file?.
>    nmm:musicArtist it's not imported and an error is launched: "Cannot set
>    values for abstract property '
>    http://www.semanticdesktop.org/ontologies/2009/02/19/nmm#albumArtist'
>    .".
>
> Solution:
>
>    - 0 to n nmm:albumArtist resources must be added to nmm:MusicAlbum.
>    - 0 to n nmm:performer resources must be added to nmm:MusicPiece.
>
>
> 2) Albums:
>
>    - there is no url in nmm:MusicAlbum so two different albums with same
>    name are considered one unique resource.
>    - determine album url is tricky, you need to obtain the url from a
>    track, a method complicated because previous problem.
>
> Solution:
>
>    - add nie:url to albums.
>    - two albums with same name but different path are different albums.
>    This have a side effect with sets if sets are in different paths, but I
>    think is better that sets are considered different albums, than two
>    different albums are the same resource. On the other side, this could be
>    handle with some smart path detection assuming some kind of organization
>    with paths. Other solution could be using nmm:albumArtis to determine if
>    two albums are different but, then we have the problem with various artists
>    compilations.
>    - added nfo:depiction as a cover, an image that could be handled by
>    Bangarang or Nepoogle.
>    - maybe more nfo:depiction for scans?
>
>
> 3) Genres:
>
>    - mp3: is not working.
>    - flac: works fine, supporting unlimited genres.
>
> Solution:
>
>    - bug with mp3 files must be fixed.
>
>
> 4) Sets:
>
>    - there is no total tracks per set.
>    - the total tracks is equal to the total tracks number in the last
>    track scanned.
>
> Solution:
>
>    - a solution similar as seasons in tvshows.
>    - a total tracks and a total tracks per set must be handled.
>
> I'm only using flac and mp3 so the same or other issues could be in other
> music formats.
>
> Sets problems is a minor issue, but the other three, must be fixed.
>
> As practically all my music is in flac format I will try to fix problems 1
> and 2 in flac analyzer, I'm crossing my fingers because is C++, but I wish
> to hear comments/suggestions before begin to code.
>
> --
> Best wishes,
> Ignacio
>
>
>


-- 
Best wishes,
Ignacio
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