Beamer, notes, and bibliography

Question

I would like to create notes for a set of slides, but I have problem with my long bibliography. Here is a MWE:

\documentclass{beamer}
\setbeameroption{show only notes}
\usepackage[backend=biber,style=authoryear-comp]{biblatex}
\addbibresource{beamer.bib}
\usepackage[utf8]{inputenc}
\usetheme{Warsaw}

\makeatletter
\def\beamer@framenotesbegin{% at beginning of slide
    \gdef\beamer@noteitems{}%
    \gdef\beamer@notes{{}}% used to be totally empty.
}

\makeatother

\begin{document}
\begin{frame}[allowframebreaks]
    FOO \\[10cm]
    BAR
\end{frame}
\appendix
\begin{frame}
    \cite{Stack1,Stack2,Stack3,Stack4,Stack5}.
\end{frame}
\begin{frame}[allowframebreaks]
    \printbibliography
\end{frame}
\end{document}

With beamer.bib looking similar to:

@MISC{Stack1, 
  author = {Caesar, Gaius J.}, 
  title = {My long title}, 
  year = {2005}, 
  addendum={Lorem ipsum dolor sit amet, consectetur adipisicing elit, 
sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.} 
}
@MISC{Stack2, 
  author = {Caesar, Gaius J.}, 
  title = {My long title}, 
  year = {2005}, 
  addendum={Lorem ipsum dolor sit amet, consectetur adipisicing elit, 
sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.} 
}
@MISC{Stack3, 
  author = {Gaius J., Caesar}, 
  title = {My long title}, 
  year = {2005}, 
  addendum={Lorem ipsum dolor sit amet, consectetur adipisicing elit, 
sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Lorem ipsum dolor sit amet, consectetur adipisicing elit, 
sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.} 
}
@MISC{Stack4, 
  author = {Caesar, Gaius J.}, 
  title = {My long title}, 
  year = {2005}, 
  addendum={Lorem ipsum dolor sit amet, consectetur adipisicing elit, 
sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Lorem ipsum dolor sit amet, consectetur adipisicing elit, 
sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.} 
}
@MISC{Stack5, 
  author = {Gaius J., Caesar}, 
  title = {My long title}, 
  year = {2005}, 
  addendum={Lorem ipsum dolor sit amet, consectetur adipisicing elit, 
sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Lorem ipsum dolor sit amet, consectetur adipisicing elit, 
sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.} 
}

I used the answer to this question: Run macro on each frame in beamer to generate as many frames in my notes as in my slides. However, if you look at the last note, the bibliography doesn't show up, and as it spans over two frames (if you uncomment the second line \setbeameroption{show only notes}), I don't have the same number of frames in both documents.

Any workaround ?

Answer 1

The \cite commands on the frames are ignored when you compile with show only notes, resulting in an empty bibliography.

Are you sure you want only the notes?

A quick workaround for this would be to compile with \setbeameroption{show notes}, so all frames and notes make it into the output document and then post-process with pdftk (or some other PDF toolkit) to extract only the even pages from the resulting PDF:

pdftk slidesandnotes.pdf cat even output notes.pdf

However, I usually prefer to have the notes together with an image of the slide on each page, so my attempt would be to post-process instead with:

pdfnup --no-landscape --nup 1x2 --scale 0.9 --twoside --offset '0.8cm 0cm'

Ths would result in a portrait-oriented PDF with the slides content in the upper half and the notes in the lower half.