Re: When (in seconds) does each page begin?

[Valentin Villenave]

On 5/28/20, Matt Wallis <m7956@acumen-it.co.uk> wrote:
> The output from event-listener is so close. I just need to get it to
> listen to the appropriate events ... if that is possible.

Then you should definitely have a look at the last link I sent
(lilypond-html-video); IIRC it uses a Scheme engraver (so no patching
Lily itself) to output svg with additional timing information encoded
as data- attributes for each rhythmic event. Then one can use that to
get a cursor, change CSS attributes on the fly (e.g. noteheads
opacity), switch from one page to the next, etc.  It’s still very much
WIP, but you can have a look at the examples (particularly the
vibraphone one) to get an idea.

I’m CCing Mathieu as it’s his project. Mathieu, you can read Matt’s
previous message here:
https://lists.gnu.org/archive/html/lilypond-user/2020-05/msg00527.html

Cheers,
-- V.