VOGONS


First post, by Scythifuge

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Greetings,

I would like to put pdfs of game manuals and other period-correct PDFs which I can read while using Acrobat Reader under Windows 3.11. However, most of the PDF files I have will not work, as they were made with modern versions of Adobe Acrobat. Is there a way, such as a site or an open source program which can convert PDFs to version 1.2?

Reply 1 of 8, by Azami

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ghostscript can do this with something like:

gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.2 -dNOPAUSE -dBATCH -sOutputFile=output.pdf input.pdf

As Actobat 3.0 is quite slow to render, you can reduce the DPI by adding

-dPDFSETTINGS=/screen

as argument.

Reply 2 of 8, by Scythifuge

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Azami wrote on 2022-10-21, 21:49:
ghostscript can do this with something like: […]
Show full quote

ghostscript can do this with something like:

gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.2 -dNOPAUSE -dBATCH -sOutputFile=output.pdf input.pdf

As Actobat 3.0 is quite slow to render, you can reduce the DPI by adding

-dPDFSETTINGS=/screen

as argument.

Thank you. I have been trying to do this after I downloaded the latest ghostscript program. However, I am getting Error: /undefined in -sDEVICE=pdfwrite

Reply 3 of 8, by Azami

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Which command are you using?

Reply 4 of 8, by Scythifuge

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Azami wrote on 2022-10-21, 22:15:

Which command are you using?

I am trying it how you posted it, though changing pdf name and location. I am completely new to the program.

Reply 6 of 8, by Scythifuge

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Azami wrote on 2022-10-22, 13:08:

Maybe add quotes to your filenames if there's a space?

https://stackoverflow.com/questions/69896246/ … device-pdfwrite

Still getting errors. I must not be understanding the syntax or am somehow leaving something out or doing it wrong. I appreciate your efforts. I will have to study multiple examples of the program being used in various ways.

Reply 7 of 8, by bttr

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Or your build of Ghostscript doesn't have the PDF writer function included.

Reply 8 of 8, by Scythifuge

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bttr wrote on 2022-10-22, 21:30:

Or your build of Ghostscript doesn't have the PDF writer function included.

Hmm, perhaps. I downloaded the latest version from the site. Maybe I should install a previous version...