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I have an mp4 file I would like to use in my beamer presentation.

My MWE is below.

\documentclass{beamer}
\usepackage{multimedia}

\begin{document}
  \begin{frame}{Sound example}
     \movie[width=8cm,height=4.5cm]{test}{151351913876539.mp4}
  \end{frame}

\end{document}

I am using LyX2.3 in a windows 10 environment. My problem is that while the latex file compiles and delivers a pdf output; when I click on the link, I get the following message.

enter image description here

  • 1
    The message is usually correct if the file exists in the same folder as the pdf it will A) warn about opening untrusted files OR B) state it is an unsupported type C)possibly ask if you want to open an alternative file D) tell you the file does not exist if the name does not match SO my 1st question is why is it trying to open a temporary folder is that where the pdf is ? – user170109 Apr 18 at 0:46
  • That is also my question. – Anthony Macks Apr 18 at 1:14
  • OK since you did not wilfully put it there it is a quirk of Lyx to build the tex and pdf files in a temporary folder but it does not transport the external mp4, you need LyX to somehow save the pdf in the folder that has the mp4.file (possibly easier said than done) I suggest this is one for lyx support or else save the tex local with mp4 and run pdfLaTeX mp4test.tex from command line in the mp4 folder P.S there are command for some media packages that can embed the media – user170109 Apr 18 at 1:26
  • 1
    Pkg multimedia implements an old part of the PDF specification that allows playback of AVI and MOV files only. For MP4/h264 encoded videos you need the so-called RichMedia annotation, provided by pkg media9: tex.stackexchange.com/q/345431 – AlexG Apr 18 at 6:44
  • @AlexG Agreed that it may not work with such a file or even other type/formats, however the message would be something like ...mp4 is not a supported file type. Would you like to choose a replacement file? with a yes no option. What happens with LyX is different even if the sound format is an acceptable one. – user170109 Apr 18 at 16:03

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