好吧，我试图理解这个答案“beamer，media9-同时播放多个视频”，以便在一帧中同时播放两个视频。
但问题是，安装 movie9、l3kernel 和 l3packages 包后，我出现以下错误：
! media9 error: "support outdated"
!
! Support package l3kernel too old.
!
! See the media9 documentation for further information.
我尝试更新这些包（l3kernel和l3packages），但错误仍然相同。我不知道这是否有助于理解问题，但我正在使用以下代码：
\begin{frame}
%(...)
\includemedia[
addresource=cosafea25.flv,
activate=pageopen,
width=500,
height=500,
flashvars={source=cosafea25.flv &autoPlay=true &loop=true}]{\fbox{Play}}{VPlayer.swf}
%(...)
\end{frame}
我正在 Windows 7 中使用 MikTeX 在 pdflatex 中进行编译。
已编辑2013 年 9 月 8 日下午 1:24（格林威治标准时间：-3）
代码的 *.log 文件：
\documentclass{article}
\usepackage{xparse}
\usepackage{media9}
\begin{document}
\end{document}
是：
This is pdfTeX, Version 3.1415926-2.4-1.40.13 (MiKTeX 2.9 64-bit) (preloaded format=pdflatex 2013.6.23) 8 SEP 2013 13:19
entering extended mode
**test.tex
(C:\Users\AlfonsoS\Desktop\test.tex
LaTeX2e <2011/06/27>
Babel <v3.8m> and hyphenation patterns for english, afrikaans, ancientgreek, ar
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lician, german, german-x-2012-05-30, greek, gujarati, hindi, hungarian, iceland
ic, indonesian, interlingua, irish, italian, kannada, kurmanji, latin, latvian,
lithuanian, malayalam, marathi, mongolian, mongolianlmc, monogreek, ngerman, n
german-x-2012-05-30, nynorsk, oriya, panjabi, pinyin, polish, portuguese, roman
ian, russian, sanskrit, serbian, slovak, slovenian, spanish, swedish, swissgerm
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ishmax, welsh, loaded.
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Package: media9 2013/08/26 v0.31 acrobat-9/X compatible media
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!
! media9 error: "support outdated"
!
! Support package l3kernel too old.
!
! See the media9 documentation for further information.
!
! For immediate help type H <return>.
!...............................................
l.73 }
|'''''''''''''''''''''''''''''''''''''''''''''''
| Please install an up to date version of l3kernel.
| Loading media9 will abort!
|...............................................
) (C:\Users\AlfonsoS\Desktop\test.aux)
LaTeX Font Info: Checking defaults for OML/cmm/m/it on input line 6.
LaTeX Font Info: ... okay on input line 6.
LaTeX Font Info: Checking defaults for T1/cmr/m/n on input line 6.
LaTeX Font Info: ... okay on input line 6.
LaTeX Font Info: Checking defaults for OT1/cmr/m/n on input line 6.
LaTeX Font Info: ... okay on input line 6.
LaTeX Font Info: Checking defaults for OMS/cmsy/m/n on input line 6.
LaTeX Font Info: ... okay on input line 6.
LaTeX Font Info: Checking defaults for OMX/cmex/m/n on input line 6.
LaTeX Font Info: ... okay on input line 6.
LaTeX Font Info: Checking defaults for U/cmr/m/n on input line 6.
LaTeX Font Info: ... okay on input line 6.
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(C:\Users\AlfonsoS\Desktop\test.aux) )
Here is how much of TeX's memory you used:
7395 strings out of 493921
139355 string characters out of 3147273
170582 words of memory out of 3000000
10639 multiletter control sequences out of 15000+200000
3640 words of font info for 14 fonts, out of 3000000 for 9000
841 hyphenation exceptions out of 8191
42i,1n,30p,244b,282s stack positions out of 5000i,500n,10000p,200000b,50000s
No pages of output.
PDF statistics:
0 PDF objects out of 1000 (max. 8388607)
0 named destinations out of 1000 (max. 500000)
1 words of extra memory for PDF output out of 10000 (max. 10000000)
感谢您的时间。
答案1
我最近在使用 media9 和 beamer 时遇到了这个问题。
当我尝试更新软件包时，它不起作用。不过，我可以使用 miktex 软件包管理器删除并重新安装它们（l3kernel 和 l3packages）。
答案2
补充一下 Chris 的上述回答：您可能需要在管理员和非管理员模式下运行 MikTex 更新管理器。在 Windows 中，这意味着：
开始 -> 所有程序 -> MikTex 2.9 -> 维护 -> 更新
和
开始 -> 所有程序 -> MikTex 2.9 -> 维护（管理员）-> 更新（管理员）