<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; ">A codec is an extension of sorts that allows the machine to decode a particular format of file.<DIV><BR class="khtml-block-placeholder"></DIV><DIV>For your files, it seems that the required codec is included in the VLC (and likely Mplayer) software, but QT does not share codecs with these programs. In order to allow QT to play the clips you have two choices:</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>1) Find out what type of codec is being used (using Get Info, for the Video track format) and locate a compatible codec from the web and install it (e.g., DivX). You can first try <A href="http://versiontracker.com">http://versiontracker.com</A> to locate and download these to some extent.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>or</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><SPAN class="Apple-style-span">2) Transcode the file from the existing format to a QT compatible format (like MOV). For this, you can use a program like <I>ffmpegX</I> which you can also download from versiontracker.</SPAN></DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><SPAN class="Apple-style-span">(or 3, just use VLC or Mplayer and avoid the hassle since both support full screen natively and for free)...</SPAN></DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><SPAN class="Apple-style-span">jim</SPAN></DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><BR class="khtml-block-placeholder"></DIV></BODY></HTML>