\documentclass[a4paper]{article}
\usepackage{pdfpages}
\begin{document}
\includepdf[pages=-,nup=1x2,landscape,frame=false]{testin.pdf}
\end{document}

\includepdf[nup=1x2,landscape,pages=4-7]{foo.pdf}
\includepdf[nup=1x2,landscape,pages=4-7,turn=false]{foo.pdf}
\includepdf[nup=2x2,pages=1-4,column]{foo.pdf}

\includepdf[nup=2x2,pages={{},5-7}]{foo.pdf}

\includepdf[nup=2x2,pages=1-4,frame]{foo.pdf}

\includepdf[nup=2x2,pages=1-4,
            trim= 0 40mm 0 40mm,
            clip]{foo.pdf}

\includepdf[nup=2x2,pages=1-4,pagecommand={\thispagestyle{plain}}]{foo.pdf}

\documentclass{article}
\usepackage{pdfpages}
\makeatletter
\def\for#1#2#3{\@ifnextchar[{\@for@{#1}{#2}{#3}}{\@for@{#1}{#2}{#3}[1]}}
\long\def\@for@#1#2#3[#4]#5{\setcounter{#1}{#3}\addtocounter{#1}{1}%
        \edef\for@loopend{\arabic{#1}}%
        \setcounter{#1}{#2}%
        \loop
        \ifnum \expandafter\the\csname c@#1\endcsname < \for@loopend\relax
        #5\addtocounter{#1}{#4}\repeat}
\newcounter{repeatcnt}
\makeatother

\begin{document}
\for{repeatcnt}{1}{10}{%
        \includepdfmerge{a.pdf,\therepeatcnt,b.pdf,\therepeatcnt}
}
\end{document}

\def\pdffile{ainput.pdf}                % <-- file 이름 수정
\def\page #1 [#2 #3 #4 #5]{%
  \count0=#1\relax
  \setbox0=\hbox{%
    \pdfximage page #1{\pdffile}%
    \pdfrefximage\pdflastximage
  }%
  \pdfhorigin=-#2bp\relax
  \pdfvorigin=#3bp\relax
  \pdfpagewidth=#4bp\relax
  \advance\pdfpagewidth by -#2bp\relax
  \pdfpageheight=#5bp\relax
  \advance\pdfpageheight by -#3bp\relax
  \ht0=\pdfpageheight
  \shipout\box0\relax
}
\page 1 [40 290 552 552]             % <-- 괄호 안의 BoundingBox 수정
\end

%%-----------
\documentclass{article}
\usepackage[pdftex]{graphicx}
\usepackage{pdfpages}

\begin{document}
\pagestyle{empty}
\includepdf[pages=-,signature=12,landscape]{doc.pdf}
\end{document}
%%------------

% Permission flag for PDF encryption: Revision will be 3 if the key size
% is greater than 40 bits.
%
% 0x0004 (Revision 2) Print the document.
%        (Revision 3) Print the document (possibly not at the highest quality
%        level, depending on whether bit 12[0x0800] is also set).
% 0x0008 Modify the contents of the document by operations other than those
%        controlled by bits 6[0x0020], 9[0x0100], and 11[0x0400].
% 0x0010 (Revision 2) Copy or otherwise extract text and graphics from the
%        document, including extracting text and graphics (in support of
%        accessibility to disabled users or for other purposes).
%        (Revision 3) Copy or otherwise extract text and grphics from the
%        document by operations other than that controlled by bit 10[0x0200].
% 0x0020 Add or modify text annotations, fill in interactive form fields,
%        and, if bit 4[0x0008] is also set, create or modify interactive
%        form fields (including signature fields).
%
% (Revision 3 only)
% 0x0100 Fill in existing interactive form fields (including signature
%        fields), even if bit 6 is clear.
% 0x0200 Extract text and graphics (in support of accessibility to disabled
%        users or for other purposes).
% 0x0400 Assemble the document (insert, rotate, or delete pages and create
%        bookmarks or thumbnail images), even if bit 4 is clear.
% 0x0800 Print the document to a representation from which a faithful digital
%        copy of the PDF content could be generated. When this bit is clear
%        (and bit 3 is set), printing is limited to a low-level representation
%        of the appearance, possibly of degraded quality.

#> dvipdfmx -S -P 0x002C foo

#> dvipdfmx -K 128 -S -P 0x0D00 foo

#> dvipdfmx -K 128 -S -P 0x082C foo