[texhax] Splitting 2-up pages

Joel C. Salomon joelcsalomon at gmail.com
Mon Feb 25 16:29:26 CET 2019

(Cross-posted from <https://tex.stackexchange.com/q/476431/2966>.)

I have a PDF document “printed” 2-up, so that on each 11″×8½″ page there
are two 5½″×8½″ pages I’d like to extract. How do I go about this?

I can do this manually by writing

\usepackage[papersize={5.5in,8.5in}, margin=0pt, ignoreall]{geometry}
\includegraphics[viewport= 0 0 396 612, page=1]{two-up.pdf}
\includegraphics[viewport= 396 0 792 612, page=1]{two-up.pdf}
\includegraphics[viewport= 0 0 396 612, page=2]{two-up.pdf}
\includegraphics[viewport= 396 0 792 612, page=2]{two-up.pdf}
% etc.

but this is repetitive and error-prone. Is there a way to do this
automatically for the entire book?

—Joel C. Salomon

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