Beamer:在外部播放器中切换幻灯片时自动启动视频(mp4)

Beamer:在外部播放器中切换幻灯片时自动启动视频(mp4)

我是 Beamer 的新手,在 Linux 上使用它,只用了 evince,没有 Acrobat 软件。我正在用 Beamer 准备演讲,想加入视频。目前我使用 Beamer 的多媒体包来尝试实现这一点:

\documentclass{beamer}
\usetheme{Warsaw}

\usepackage{multimedia}


\begin{document}

\begin{frame}{First frame}
\end{frame}


\begin{frame}{Second Frame}
\movie[externalviewer,autostart]{A movie}{my_movie.mp4}
\end{frame}

\end{document}

我可以单击链接,视频会按预期开始播放。不幸的是,我不知道我是否只有演示者,或者我是否有鼠标,所以我希望视频在显示帧时自动开始播放。这应该可以通过使用的命令来实现,但它不起作用 - “autostart”参数不起作用。有什么办法吗,我该如何实现这个?谢谢,mathse

答案1

在 PDF 中,这可以通过使用由页面打开事件触发的“启动”操作来实现。

在 Acrobat Reader 中工作;由于 Evince 不监听页面事件,因此必须通过单击链接手动触发“启动”操作。

pdflatexlualatex; example-video.mp4,即不是嵌入的,必须复制到 PDF 的目录中:

\documentclass{beamer}
\usepackage{luatex85}

\title{Presentation}

\begin{document}

\begin{frame}
\titlepage
\end{frame}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% `launch' action, triggered on `page-open'
\edef\pdfpageattrSaved{{\the\pdfpageattr}}
\begingroup
\edef\x{\endgroup
  \pdfpageattr{%
    /AA <<  %additional actions for next page
      /O << %on page-open event
        %%%%%%%%% adjust this %%%%%%%%%
        /S/Launch /F(example-movie.mp4)
        %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
      >>
    >>
  }%
}%
\x
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\begin{frame}{With video}
  \leavevmode\pdfstartlink attr {/Subtype/Link} user {/A <<
    %%%%%%%%% adjust this %%%%%%%%%
    /S/Launch /F(example-movie.mp4)
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  >>}%
  Click\pdfendlink\ to trigger `Launch' action manually (Evince).
\end{frame}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% reset no normal behaviour
\expandafter\pdfpageattr\pdfpageattrSaved
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\begin{frame}{The End}
\end{frame}

\end{document}

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