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Re: PNG file output

From: Jean Abou Samra
Subject: Re: PNG file output
Date: Thu, 02 Mar 2023 15:15:54 +0100
User-agent: Evolution 3.46.4 (3.46.4-1.fc37)

Le jeudi 02 mars 2023 à 08:11 -0600, a écrit :

I’ve found your response, and I’ve updated my list subscription to my new email.
My reason for wanting this is that I need to generate several types of output based on some other settings in my input file. For example, I need PDF output for print, and PNG output in a couple different resolutions for projection on a screen. This is for use in a church.
One thought I had was to spawn another LilyPond so that I could specify command line options based on the settings in my input file. I haven’t been able to get this to work so far, for reasons I don’t understand. I tried this using (system "lilypond -fpng"). I also tried Guile’s system*, but got an unbind error. I’m using 2.22.2.

Did you mean “unbound error”? But what is the error precisely?

Perhaps a better approach would be to define whatever settings you have outside of the LilyPond file, in a script invoking LilyPond, add compilation flags based on them, and also pass them to LilyPond using the --evaluate option (

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