umber of the stream within this file that we want to use, also zero-based. "-map 0:3" therefore means that we want to use the fourth stream in the first (and only, in ... case the first "-map" option specifies the stream to use for the video and the second one specifies which stream to use for the audio:
<code>
$ ffmpeg -i mr.vob -ma... ltiplex it and the reworked audio (duly converted to MP2 or AC3) with mplex, or
Ask ffmpeg to pull the video in from the original .vob file and the audio
