Re: calculation of the total duration of a score

[Paul]

Hi Marc,

Well, looks like I sent the file too soon before testing it for this use 
case.  It looks like the html-live-score is using different units of 
time somehow?  I haven't had a chance to look into it or figure out the 
difference.

Anyway, the attached file will report the correct total duration, thanks 
to some help from looking at Harm's code.  (But I think this version 
will probably not work with the code for html-live-score...)

Anyway, you're probably better off using Harm's code since it was 
written for calculating the total duration.

Cheers,
-Paul



On 09/08/2016 06:10 AM, Marc Hohl wrote:
> Hi Paul,
>
> thanks for the file. It lookes quite promising, but a quick test shows 
> some strange numbers I do not understand:
>
> test.ly ---
>
> \version "2.19.47"
>
> \include "grob-meta-data-engraver.ily"
>
> \score {
>   \new Staff {
>      \tempo 4 = 60
>      \repeat unfold 60 c'4
>    }
>    \layout { }
>    \midi { }
>  }
>
> Processing this file yields to:
>
> GNU LilyPond 2.19.48
> »test.ly« wird verarbeitet
> Analysieren...
> Interpretation der Musik...[8][16][16]3.75
> Vorverarbeitung der grafischen Elemente...
> Interpretation der Musik...
> MIDI-Ausgabe nach »test.midi«...
> Ideale Seitenanzahl wird gefunden...
> Musik wird auf eine Seite angepasst...
> Systeme erstellen...
> Layout nach »/tmp/lilypond-pgKSZe« ausgeben...
> Konvertierung nach »test.pdf«...
> Löschen von »/tmp/lilypond-pgKSZe«...
> Kompilation erfolgreich beendet
>
> address@hidden ~/engraver$ timidity test.midi
> Playing test.midi
> MIDI file: test.midi
> Format: 1  Tracks: 2  Divisions: 384
> Sequence:
> Text: creator:
> Text: GNU LilyPond 2.19.48
> Playing time: ~64 seconds
> Notes cut: 0
> Notes lost totally: 0
>
> It shows a duration of 3.75 in line 4.
>
> A timidity call plays the file in about 64 seconds
> (even strange, 60 notes with tempo 4 = 60 should have a total duration 
> of 60 seconds).
>
> What does 3.75 mean?
>
> Marc
>
>
> Am 08.09.2016 um 05:39 schrieb Paul:
> > On 09/05/2016 05:01 AM, Marc Hohl wrote:
> >
> > > Has someone else already done something like this? I have no experience
> > > in writing scheme engravers, so any hint would be highly appreciated.
> >
> > lilypond-html-live-score does something like this by post-processing an
> > SVG with python to add meta data to the grobs in the SVG file:
> > https://gitlab.com/sigmate/lilypond-html-live-score/blob/master/make-live-score#L88 
> >
> >
> >
> > I was working on porting part of that to scheme so it could be done
> > directly.  I've attached my include file.  It will currently display the
> > total duration to the log.  It could be simplified in various ways if it
> > was calculating just the total duration and not adding timing info to
> > every grob.
> >
> > It's still a work in progress and only lightly tested.
> >
> > -Paul
> >
> >
> >
> > _______________________________________________
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> > address@hidden
> > https://lists.gnu.org/mailman/listinfo/lilypond-user
>
>
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grob-meta-data-engraver.ily
Description: Text document