I want to convert all of my DVD's to multiple audio track MKV files using Xvid for video and ac3 for audio.

My questions are:
  • What is the maximum number of audio tracks supported by an MKV file? (I have some movies with more than 2 audio tracks that I want ripped.)
  • What is the easiest way to do this conversion? I'd like to find something like AutoGK that will output to an MKV (again, preferably with support for more than 2 audio streams.

Thanks in advance for any help.