Since firmware 1.1.3 the iPhone's / iPod touch's video player allows multiple audio tracks in a video. I wanted to know how to build such a video file. Here is how it works (for OS X, Linux, Windows) using the upcoming version of HandBrake (current version 0.9.1 can't do it). Article is in German, though ...
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iPhone/iPod touch: 2 audio tracks in a video
