RE: Question about page break time indices
Carl, Use the the bar numbers and the timing of a single (average) bar duration to calculate the time somewhere in the music Is this a option? Kind regards, Dirk -Original Message- From: lilypond-user-bounces+klamer=zonnet...@gnu.org [mailto:lilypond-user-bounces+klamer=zonnet...@gnu.org] On Behalf Of Carl Peterson Sent: woensdag 30 december 2015 8:11 To: lilypond-user@gnu.org Subject: Question about page break time indices All, I am involved in some choral recording projects where we are having the singers sing from projected slides. To aid in timing, pitch, etc., we have it set up where they have headphones feeding them the MIDI of the song being recorded as they sing. All of this is synchonored through the recording software, with the slides being pre-rendered to a video file. Right now, the music slides are being created in Finale (cringe), the MIDI is being manually input into the recording software because we've had issues with Finale's MIDI being accurate on tempo changes, and I am using Apple Keynote to render the slides to video using manual timings. I would like to use Lilypond to render the individual slides and the MIDI, then use ffmpeg and some other things to programmatically render the video itself. The issue is that in order to do that, I need accurate timing information on slide changes. Which gets to my question/request. Is there a way, when Lilypond is running, for it to output some sort of auxiliary file with some kind of tick/time code information about each page? In other words, what is the time index of the first note on a given slide/page? With this, I can work with scripting tools to work backwards from each time code to generate the still images for the transitions from slide to slide. Thanks, Carl ___ lilypond-user mailing list lilypond-user@gnu.org https://lists.gnu.org/mailman/listinfo/lilypond-user - Geen virus gevonden in dit bericht. Gecontroleerd door AVG - www.avg.com Versie: 2016.0.7303 / Virusdatabase: 4489/11286 - datum van uitgifte: 12/30/15 - Geen virus gevonden in dit bericht. Gecontroleerd door AVG - www.avg.com Versie: 2016.0.7303 / Virusdatabase: 4489/11286 - datum van uitgifte: 12/30/15 ___ lilypond-user mailing list lilypond-user@gnu.org https://lists.gnu.org/mailman/listinfo/lilypond-user
Re: Question about page break time indices
Am 30.12.2015 um 13:03 schrieb Thomas Morley: > there were some similiar projects for videos etc, can't remember, though. > Others? There is ly2video: https://github.com/aspiers/ly2video For examples search for ly2video on youtube. ___ lilypond-user mailing list lilypond-user@gnu.org https://lists.gnu.org/mailman/listinfo/lilypond-user
Re: Question about page break time indices
Hi Carl,
2015-12-30 8:10 GMT+01:00 Carl Peterson :
> All,
>
> I am involved in some choral
> recording projects where we are
> having the singers sing from
> projected slides. To aid in timing,
> pitch, etc., we have it set up where
> they have headphones feeding them the
> MIDI of the song being recorded as
> they sing. All of this is synchonored
> through the recording software, with
> the slides being pre-rendered to a
> video file.
>
> Right now, the music slides are being
> created in Finale (cringe), the MIDI
> is being manually input into the
> recording software because we've had
> issues with Finale's MIDI being
> accurate on tempo changes, and I am
> using Apple Keynote to render the
> slides to video using manual timings.
>
> I would like to use Lilypond to
> render the individual slides and the
> MIDI, then use ffmpeg and some other
> things to programmatically render the
> video itself. The issue is that in
> order to do that, I need accurate
> timing information on slide changes.
there were some similiar projects for videos etc, can't remember, though.
Others?
>
> Which gets to my question/request. Is
> there a way, when Lilypond is
> running, for it to output some sort
> of auxiliary file with some kind of
> tick/time code information about each
> page? In other words, what is the
> time index of the first note on a
> given slide/page? With this, I can
> work with scripting tools to work
> backwards from each time code to
> generate the still images for the
> transitions from slide to slide.
>
> Thanks,
> Carl
Not sure I fully understand, but is the following of some help for you?
\version "2.19.32"
#(define* (print-pages-first-bar-numbers layout pages #:optional print-to-file)
;; If `print-to-file is set #t the output is written to a file
;; otherwise usually displayed in Terminal
(let* ((lines (map (lambda (page) (ly:prob-property page 'lines)) pages))
;; list of first systems of each pages
(sys
(map
(lambda (line)
(append-map
(lambda (l)
(let ((system-grob (ly:prob-property l 'system-grob)))
(if (not (null? system-grob))
(list system-grob)
system-grob))
)
line))
lines))
;; list of rhythmic-locations of first sys
;; returning a BarNumber and a moment, the moment is usually zero
(sys-rhythmic-location
(map
(lambda (s)
(if (and (not (null? s)) (ly:grob? (car s)))
(grob::rhythmic-location (car s))
#f))
sys))
(start-bar-numbers
(map
(lambda (r-l)
(if (pair? r-l)
(car r-l)
#f))
sys-rhythmic-location))
(formatted-output
(map
(lambda (page b-nr)
(if b-nr
(format #f "page ~a starts with BarNumber ~a\n" page b-nr)
(format #f "page ~a contains no music\n" page))
)
(iota (length pages) 1 1)
start-bar-numbers)))
(if (not (null? start-bar-numbers))
(if print-to-file
(let* ((output-name (ly:parser-output-name))
(outfilename (format "~a-page-first-bars.log" output-name))
(outfile (open-output-file outfilename)))
(if (output-port? outfile)
(begin
(format #t "\n\tprinting to ~a" outfilename)
(for-each
(lambda (i) (display i outfile))
formatted-output))
(ly:warning
(_ "Unable to open output file ~a to print the information")
outfilename))
(close-output-port outfile))
(for-each display formatted-output)
\paper {
#(define (page-post-process layout pages)
(print-pages-first-bar-numbers layout pages #t))
}
\header { title = "TITLE" }
\pageBreak
\score {
\new Staff {
\repeat unfold 2 {
\time 4/4 c''1
\time 3/4 d''2.
\time 3/8 e''8 8 8
\pageBreak
}
}
}
\markup "MARKUP"
\pageBreak
\score {
\new Staff {
\repeat unfold 2 {
\time 4/4 c''1
\time 3/4 d''2.
\time 3/8 e''8 8 8
\pageBreak
}
}
}
Cheers,
Harm
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Question about page break time indices
All, I am involved in some choral recording projects where we are having the singers sing from projected slides. To aid in timing, pitch, etc., we have it set up where they have headphones feeding them the MIDI of the song being recorded as they sing. All of this is synchonored through the recording software, with the slides being pre-rendered to a video file. Right now, the music slides are being created in Finale (cringe), the MIDI is being manually input into the recording software because we've had issues with Finale's MIDI being accurate on tempo changes, and I am using Apple Keynote to render the slides to video using manual timings. I would like to use Lilypond to render the individual slides and the MIDI, then use ffmpeg and some other things to programmatically render the video itself. The issue is that in order to do that, I need accurate timing information on slide changes. Which gets to my question/request. Is there a way, when Lilypond is running, for it to output some sort of auxiliary file with some kind of tick/time code information about each page? In other words, what is the time index of the first note on a given slide/page? With this, I can work with scripting tools to work backwards from each time code to generate the still images for the transitions from slide to slide. Thanks, Carl ___ lilypond-user mailing list lilypond-user@gnu.org https://lists.gnu.org/mailman/listinfo/lilypond-user
