On Mac the ffmpegx tool supports 2 audio tracks. Maybe worth checking out?<div><br><div><a href="http://www.ffmpegx.com/index.html">http://www.ffmpegx.com/index.html</a></div><div><ul><li><span class="Apple-style-span" style="font-family: Geneva, Verdana, Arial, Helvetica; color: rgb(51, 51, 51); font-weight: bold; ">Creates AVI or MPG files with two audio tracks.</span></li>
<li><span class="Apple-style-span" style="font-family: Geneva, Verdana, Arial, Helvetica; color: rgb(51, 51, 51); "><b>Supports subtitles</b> in VobSub, SubRip, MicroDVD, SubViewer, Sami, VPlayer, RT, SSA, AQTitle, JACOsub and MPsubt formats</span></li>
</ul></div><div><div><br></div><div><div class="gmail_quote">On Tue, Feb 2, 2010 at 5:40 PM, Silvia Pfeiffer <span dir="ltr"><<a href="mailto:silvia@silvia-pfeiffer.de">silvia@silvia-pfeiffer.de</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div class="im">On Wed, Feb 3, 2010 at 11:21 AM, Chris Double <<a href="mailto:chris.double@double.co.nz">chris.double@double.co.nz</a>> wrote:<br>
> Excerpts from Frank Barchard's message of Wed Feb 03 13:11:15 +1300 2010:<br>
>><br>
>> Yes, and its good to learn from DVD's too.<br>
<br>
</div>DVD is a subpart of MPEG: <a href="http://www.mpucoder.com/DVD/vobov.html" target="_blank">http://www.mpucoder.com/DVD/vobov.html</a>,<br>
<a href="http://dvd.sourceforge.net/dvdinfo/dvdmpeg.html" target="_blank">http://dvd.sourceforge.net/dvdinfo/dvdmpeg.html</a> .<br>
Uses the same functionality for tracks, iiuc.<br>
<div class="im"><br>
> It might be useful to look at the Matroska container format too. It handle's multiple tracks iirc.<br>
<br>
</div>Matroska is interesting, see<br>
<a href="http://www.matroska.org/technical/specs/index.html#Track" target="_blank">http://www.matroska.org/technical/specs/index.html#Track</a> .<br>
<br>
It has a TrackNumber and a TrackUID (the latter probably maps well<br>
onto Ogg serialnumbers) and a Name (human-readable).<br>
<br>
Further for display order it has a TrackOverlay element, which<br>
specifies a track to be an overlay onto another one.<br>
<br>
Cheers,<br>
<font color="#888888">Silvia.<br>
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