I think DVD studio pro could do that, alas no longer in development.  You will 
have to find a "used" copy (ha ha).

The other consideration is that the bandwidth for DVD spec (8Mbps or whatever) 
cannot be exceeded by all the angles put together - that is, besides what fits 
on a disc, you have to consider that the playhead is reading both angles at 
once even if it is only showing one.  Therefore, two streams would be something 
like half quality, three streams would be 1/3 quality.

The principle is the same as "audio commentary" track - You have the film's 
soundtrack, plus maybe another language version, and then the audio 
commentaries, all muxed together as an Mpeg-2 stream.  Thus the total of all 
these things put together can't exceed the DVD bandwidth spec.  Otherwise your 
player will stutter or choke.  Older DVD players choked even on stuff that was 
at the high end of the spec until everyone got the bugs worked out.

I mean if you have a 2 minute doc, you'd think you could use all 4.37 Gb on the 
disc and thus have two high-quality, less-compressed angles... but no, the 
video + audio of all streams together can't exceed 8 Mbps.

When you encode the video to DVD you'd get the choice of bitrate, so you'd have 
to pick 4Mbps or even 3.8 maybe.  Might look okay, depending on what you shoot 
- lots of moving camera, big crowds, etc, might tax the spec.  If it's punk 
enough, who cares?

Maybe you could do this better on BluRay or HD-DVD, giving you more quality to 
work from - it would look like low quality BluRay rather than crappy-quality 
DVD, which would be an improvement.

- Flick


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