How can I get an outline in org-beamer export without changing the other frames?

Question

I have this org-beamer example:

#+TITLE:      Example
#+LANGUAGE:   en
#+SELECT_TAGS: export
#+EXCLUDE_TAGS: noexport
#+CREATOR: Emacs 26.3 (Org mode 9.1.9)
#+STARTUP: beamer
#+BEAMER_FRAME_LEVEL: 2
#+COLUMNS: %40ITEM %10BEAMER_env(Env) %9BEAMER_envargs(Env Args) %4BEAMER_col(Col) %10BEAMER_extra(Extra)
#+OPTIONS:   num:t toc:t \n:nil @:t ::t |:t ^:t -:t f:t *:t <:t
#+OPTIONS:   TeX:t LaTeX:t skip:nil d:nil todo:t pri:nil tags:not-in-toc

* Section

** Frame
   Pellentesque condimentum, magna ut suscipit hendrerit, ipsum augue ornare nulla, non luctus diam neque sit amet urna.

* Other Section

** Other Frame
   Nullam rutrum.

* Third Section

** Third Frame
   Pellentesque tristique imperdiet tortor.

It does what - almost. The "normal" pages look like this:

But: the Outline is empty. I found that I can add an outline for the 2nd level org items with the option #+OPTIONS: H:2. With that option, I get an outline, but now the pages look like this:

Is there a way to get both?

Answer 1

Based on Joe Corneli's answer here, you can create an outline manually as a list of your frames.

Create a file named list-of-frames.tex and edit your org file as follows:

list-of-frames.tex:

\makeatletter
\newcommand\listofframes{\@starttoc{lbf}}
\makeatother

\addtobeamertemplate{frametitle}{}{%
  \addcontentsline{lbf}{section}{\protect\makebox[2em][l]{%
    \protect\usebeamercolor[fg]{structure}\insertframenumber\hfill}%
  \insertframetitle\par}%
}

your-file.org:

#+TITLE:      Example
#+LANGUAGE:   en
#+SELECT_TAGS: export
#+EXCLUDE_TAGS: noexport
#+CREATOR: Emacs 26.3 (Org mode 9.1.9)
#+STARTUP: beamer
#+BEAMER_FRAME_LEVEL: 2
#+COLUMNS: %40ITEM %10BEAMER_env(Env) %9BEAMER_envargs(Env Args) %4BEAMER_col(Col) %10BEAMER_extra(Extra)
#+OPTIONS:   num:t toc:nil \n:nil @:t ::t |:t ^:t -:t f:t *:t <:t
#+OPTIONS:   TeX:t LaTeX:t skip:nil d:nil todo:t pri:nil tags:not-in-toc
#+LaTeX_HEADER: \input{list-of-frames.tex}

* Outline
:PROPERTIES:
:BEAMER_env: ignoreheading
:END:
\addtocounter{framenumber}{-1}
\begin{minipage}[c][\textheight][c]{\linewidth}
\listofframes
\end{minipage}

* Section

** Frame
   Pellentesque condimentum, magna ut suscipit hendrerit, ipsum augue ornare nulla, non luctus diam neque sit amet urna.

* Other Section

** Other Frame
   Nullam rutrum.

* Third Section

** Third Frame
   Pellentesque tristique imperdiet tortor.