On 15/10/14 12:52, Henning Hraban Ramm wrote:
Am 2014-10-15 um 08:26 schrieb Vaughan McAlley <vaug...@mcalley.net.au>:
I want to try to produce PDF/A-1b files from Lilypond to submit to the
Australian Music Centre (australianmusiccentre.com.au). It looks like it would
be possible to do this by exporting to Postscript and using Ghostscript:
http://www.ghostscript.com/doc/9.14/Ps2pdf.htm#PDFA
Has anyone done this and have any tips or pitfalls before I start on this
journey myself?
The only thing missing in LilyPond’s PDF files is the XMP metadata mark of
PDF/A-1(b). Every other requirement is fulfilled, as soon as you disable links.
#(ly:set-option (quote no-point-and-click))
The reasons they give against „regular“ PDFs are not valid, at least for
LilyPond’s PDFs - I guess they experienced some really bad data (maybe scanned
scores in PDFs, but even that wouldn’t require printing and re-scanning).
Probably they just don’t know what they’re talking about - I had similar
nonsensical requirements from several printshops.
Some printshop's pre-press setting equipment/software can be very
specific when having to deal with PostScript files (including PDFs) and
outputting them to plate or film. That's not the fault of the print
shops (they are not 'computer' literate as such usually, but know what a
PDF file is).
That's not to say it will be an issue, but it won't hurt to ask why they
ask for such specific requirements and glean if it is because they are
told to or that is what they always require (which usually indicates the
pre-process software they use will check (for whatever it checks for)
when processing the files) or if there is a technical issue they can
tell you.
I cannot speak for all print shops but have had experience with
malformed PS files in the past when I used to work at a 'printshop'. It
can cost a lot of money if a file is processed and the material that
comes out at the other end is garbage - aluminium plates or film costs a
lot of money for them and their margins are small enough as it is,
assuming they are litho printing than just 'laser printing' (even so the
ink still costs them money).
James
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