Trim/Crop PDF file with LaTeX

pdf-trim.tex

\documentclass[12pt,oneside,a4]{article}

\usepackage{forloop}
\usepackage{ifthen}

\usepackage{graphicx}
\usepackage{pdfpages}

\setlength{\parindent}{0pt}

\begin{document}
\thispagestyle{empty}

\newcounter{ct}
\forloop{ct}{1}{\value{ct}<363}{
  \includepdf[trim=1cm 3cm 1cm 2cm, pages={\arabic{ct}}]{input.pdf}
}

\end{document}