On Tue, 2023-12-12 at 02:31 -0800, Aaron Hill wrote:
> Would this not work?
>
> %%%%
> #(define (add-midi-to-score score)
> #{ \score { $score \midi {} } #})
>
> toplevel-score-handler =
> #(lambda (score)
> (collect-scores-for-book (add-midi-to-score score)))
> %%%%
Indeed it does!
Without a \midi block one midi file is produced.
However, if there is already a \midi block, two midi files are
produced. I'm not sure if that's going to be a problem aside from the
extra processing time.
If there are multiple \score blocks, I don't know what would happen...
ly2video is only intended to process a single score. Or perhaps even
just a single instrument. And tries to do so on files that already
produce a pdf.
There is another project called LilypondToBandVideoConverter which
outputs multiple midi tracks and multiple videos. It requires a unique
lilypond file that won't compile to anything on it's own. It just puts
the music in predefined variables that the python code then puts into a
purpose built lilypond file to create what it needs.
