\documentclass[12pt, xcolor={svgnames,table}]{beamer}
%\documentclass[20pt,handout]{beamer}
\usetheme{Darmstadt}
\usepackage{graphicx}
%\usepackage[german]{babel}
\usepackage{ngerman}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{tikz}
\setbeamertemplate{footline}[frame number]
\usepackage{pgfpages}
<% if notes %>
\setbeameroption{show notes on second screen = right}
<% end %>

\newcommand{\cc}[1]{\includegraphics[height=4mm]{../../img/#1.png}\hspace{1mm}}
\usepackage{ifthen}
\newcommand{\license}[2][]{\\#2\ifthenelse{\equal{#1}{}}{}{\\\scriptsize\url{#1}}}
\usepackage{textcomp}
\usepackage{hyperref}

\pgfdeclareimage[height=.6cm]{c3d2logo}{./img/c3d2.pdf}

\pgfdeclarelayer{foreground}
\pgfsetlayers{main,foreground}
\logo{\pgfputat{\pgfxy(-1,0)}{\pgfbox[center,base]{\pgfuseimage{c3d2logo}}}}

\title{<%= lecture['title'] %>}
\author{\small <%= lecture['presenters'] %> \\\large <%= lecture['organization'] %>}
\date{<%= lecture['date'] %>}

\begin{document}
\maketitle

<% deck.each do |section, snippets| %>
  \section{<%= section %>}
  \subsection{}
  <% snippets.each do |snippet| %>
    \input{<%= snippet.sub(/\.tex$/, "") %>}
  <% end %>
<% end %>

\end{document}