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附加问题：

tag-icon • tag-icon beamer animate
附加问题：

我希望动画从第四帧开始出现，而不是从第一帧开始。如何实现？

\documentclass[12pt,aspectratio=1610]{beamer}
\usepackage{adjustbox}
\usepackage{animate}
\begin{document}
\section{Section 1}
\begin{frame}[t]{Frame Title}
    \begin{columns}[t]
        \begin{column}{0.5\textwidth}
            \pause
            \adjincludegraphics[width=\linewidth,valign=t,center]{example-image-a}
            \pause
            \[
                Kim=Jong+Un
            \]
        \end{column}
        \begin{column}{0.5\textwidth}
            \pause
            \begin{adjustbox}{width=\linewidth,valign=t,center}
                \animategraphics[controls,loop]{1}{example-image-duck}{}{}
            \end{adjustbox}
            \pause
            \begin{itemize}
                \item Kim Jong Un\pause
                \item Peace Be Upon Him\pause
            \end{itemize}
            \begin{center}
                The end of the world!
            \end{center}
        \end{column}
    \end{columns}
\end{frame}
\end{document}

在此处输入图片描述

附加问题：

如何防止幻灯片向前导航时动画重新启动？下一张幻灯片必须显示动画的当前帧，而不是动画的第一帧。

答案1

从本质上来说，它是旧帖针对问题中给出的具体示例进行了调整。解决方案基于 的animateJS API 以及beamer类的内部\ifbeamer@anotherslide。

所有请求的功能都已解决。此外，当前播放状态（暂停或播放、前进或后退）和动画的当前帧速率在叠加层之间传递。已成功测试与 Acrobat Reader 和 Okular 配合使用。

按照以下方式使用，并注意动画的标记方式，<label>_\thepage以及标签如何与括号命令一起使用，\putBeforeAnim{<label>}/ \putAfterAnim{<label>}。另外，请注意 的draft备选子句中的选项\doifvisible。

\doifvisible{%
  \putBeforeAnim{duck}%
  \animategraphics[label=duck_\thepage,controls,loop]{1}{example-image-duck}{}{}%
  \putAfterAnim{duck}%
}{
  \phantom{\animategraphics[draft,controls,loop]{1}{example-image-duck}{}{}}%
}

完整示例。只需忽略undefined references警告即可。（警告是无害的，只是因为放在\animategraphics框中\phantom。将在下一版本中修复。）

\documentclass[12pt,aspectratio=1610]{beamer}
\usepackage{adjustbox}
\usepackage{animate}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% \putBeforeAnim{<label>}
%   \animategraphics[label=<label>_\thepage,...]{..}{..}{..}{..}
%   or
%   \begin{animateinline}[label=<label>_\thepage,...]{..}
%   ...
%   \end{animateinline}
% \putAfterAnim{<label>}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\newcommand\putBeforeAnim[1]{%
  \myPdfAnnot{1ex}{1ex}{0pt}{%
    /Subtype/Widget/FT/Btn/Ff 65537/T (#1_a_\thepage)%
    /AA <<%
      /PC << % exec on page-close
        /S/JavaScript /JS (
          try{
            var #1CurFrame  =anim['#1_\thepage'].frameNum;
            var #1CurSpeed  =anim['#1_\thepage'].speed;
            var #1PlayingFwd=anim['#1_\thepage'].isPlaying&&  anim['#1_\thepage'].playsFwd;
            var #1PlayingBwd=anim['#1_\thepage'].isPlaying&&(!anim['#1_\thepage'].playsFwd);
          } catch(e){}
        )
      >>
    >>%
  }%
}
\newcommand\putAfterAnim[1]{%
  \myPdfAnnot{1ex}{1ex}{0pt}{%
    /Subtype/Widget/FT/Btn/Ff 65537/T (#1_b_\thepage)%
    /AA <<%
      /PO << % exec on page-open
        /S/JavaScript /JS (
          try{
            anim['#1_\thepage'].frameNum=#1CurFrame;
            anim['#1_\thepage'].speed=#1CurSpeed;
            if(#1PlayingFwd){anim['#1_\thepage'].playFwd();}
            if(#1PlayingBwd){anim['#1_\thepage'].playBwd();}
          } catch(e){}
        )
      >>
    >>
  }%
}
\ExplSyntaxOn
  \let\myPdfAnnot\pbs_pdfannot:nnnn
\ExplSyntaxOff
\makeatletter
\newcommand\doifvisible[2]{\ifbeamer@anotherslide #2\else #1\fi}
\makeatother
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\begin{document}
\section{Section 1}
\begin{frame}[t]{Frame Title}
    \begin{columns}[t]
        \begin{column}{0.5\textwidth}
            \pause
            \adjincludegraphics[width=\linewidth,valign=t,center]{example-image-a}
            \pause
            \[
                Kim=Jong+Un
            \]
        \end{column}
        \begin{column}{0.5\textwidth}
            \pause
            \begin{adjustbox}{width=\linewidth,valign=t,center}
              \doifvisible{%
                \putBeforeAnim{duck}%
                \animategraphics[label=duck_\thepage,controls,loop]{1}{example-image-duck}{}{}%
                \putAfterAnim{duck}%
              }{%
                \phantom{\animategraphics[draft,controls,loop]{1}{example-image-duck}{}{}}%
              }
            \end{adjustbox}
            \pause
            \begin{itemize}
                \item Kim Jong Un\pause
                \item Peace Be Upon Him\pause
            \end{itemize}
            \begin{center}
                The end of the world!
            \end{center}
        \end{column}
    \end{columns}
\end{frame}
\end{document}

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