Re: Transcribing individual score pages from scans

[David Cuenca]

Hi Federico,

What I need is the ability to generate score in two view modes: each page individually, or all pages together. 

Imagine the use case. A user works page scan by page scan to make the lilypond engraving look exactly like it was originally published (possible already). Then they want to visualize all pages together (possible but only as images, one after the other), and finally they want to download a single .ly file or to render a typeset pdf, or generate a midi file from all the pages together (not possible).

Yes, with the mediawiki extension we already can put all pages together (see [1], if you hover your mouse over the small number on the left you will see that is composed of two pages "100", "101"). When you click on that number you go to the page view of either one, and  if you click edit you will see the lilypond source of the corresponding page. But to associate several independent pages as a bundle (for rendering, download, or midi generation), that doesn't work. 

From our side we are considering each page as an individual independent file. It was suggested by Urs to use one variable for each page, and then render them either individually (when the user is in page view) or all together (when the user request a download of the whole book/score). However, lilypond is running in safe mode, thus variables are not supported...

I hope I have better explained the problem now... any ideas about how to proceed?

If you want to dig deeper you can take a look to our Extension:Proofread Page [2] which manages transclusion. And if you'd like to go even a step further and have a test environment, it is easy to set up a virtual machine with Vagrant [3]. 

Cheers,

Micru

[1] https://ca.wikisource.org/wiki/Segona_serie_de_can%C3%A7ons_populars_catalanes/Fum,_fum,_fum

[2] https://www.mediawiki.org/wiki/Extension:Proofread_Page

[3] https://www.mediawiki.org/wiki/MediaWiki-Vagrant

On Mon, May 12, 2014 at 4:53 PM, Federico Bruni <address@hidden> wrote:

Hi David

I haven't totally understood what you need, but it seems to me that what you are looking for should be achieved by the Mediawiki extension, not by LilyPond.

2014-05-09 13:21 GMT+02:00 David Cuenca <address@hidden>:

Hi Urs,

unfortunately we cannot work with files, nor variables. The only thing we can do is to join text inputs. What we are after is a way to append the source texts that generate individual pages and generate a valid lilypond input just by adding a header/footer.

Is that possible?

Thanks

David

On Fri, May 9, 2014 at 12:31 PM, Urs Liska <address@hidden> wrote:

Am 09.05.2014 12:26, schrieb Urs Liska:

Am 09.05.2014 12:16, schrieb David Cuenca:

Hi,

I'm a contributor from Wikisource, an online digital library part of the
Wikimedia Foundation, where we transcribe works in the public domain.
Since
last year we have enabled a mediawiki extension to render scores [1],
which
now enables our users to transcribe pages with music like these [2] [3]

Of course that is great when a work is only one page long, but for us it
becomes problematic to stitch together all the different pages into a
single one (what we call "transclusion").
Some users are just considering each page independent, but that doesn't
allow us to generate a whole lilypond file for download. For instance
check
this Catalan song [4], if you click on "edit" you will see that we are
combining two pages [5] and [6], where the text resides.

What we would like is to combine these pages to generate the lilypond
file.
I have been checking the input structure documentation [7] and I found
"\book" and "\bookpart", but I didn't see anything like "\bookpage".
Is there any command that would help us to achieve the page separation
that
we need?

If I'm not mistaken that should be quite easy to achieve.
You can organize LilyPond input in variables, and you can combine those
variables to larger units. That is, you don't use variables only to
store the different parts in a score, but you can also separate
different sections of it.

I'm not completely sure if that fits your use case, but you may have a
start with something like:

violinPageI = ŗelative c'' {
% some music
}

violinPageII = ŗelative c'' {
% some music
}

violinMusic = {
   \violinPageI
   \violinPageII
}

\score {
   \new Staff \violinMusic
}

With this you can as well create alternative scores for individual pages
if you like.

Does that sound plausible?

Best
Urs

Oh, I've already a few additional remarks that I forgot.

Of course you will want to store the variables in individual files and include them.

If you have spanners reaching from one variable to another (e.g. slurs) you will have to enclose the variables in an explicitly created voice:

violinMusic = \new Voice {
% ...
}

Urs

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