That's typical too. It depends on the encoder/decoder used and also
the horsepower of your particular system. What can happen is the
application will skip frames in order to avoid falling too far behind.
The result is brief periods of out of sync audio.
The samples included probably play fine because they were created on
high end systems which should normally be able to avoid sync issues.
If you notice out of sync issues trying to play back a recorded file
off your system prior to buring a DVD it usually is a sign your system
isn't powerful enough to avoid dropping frames during the capture
process. If the file captured plays in sync and only get out of sync
after burning to a DVD then more likely an encoding issue.
I haven't played with Movie Maker yet myself so I'm in the dark what
it can and can't do. On high end software like Vegas you can easily
seperate the video track from the audio and stretch one or the other
to get back in sync if the out of sync is linear in nature. If Movie
Maker supports it try burning the DVD at a slightly lower bitrate.
Another common issue is any home brew DVD may play fine off your
computer but stumble if you attempt to play off a set top DVD player
hooked up to your big screen TV or the other way around.
While Microsoft doesn't advertise it, they also offer a free encoder
called Windows Media Encoder. It a lot more geeky then Movie Maker,
but it offers more control. You can download a free copy here:
http://www.microsoft.com/windows/windowsmedia/forpros/encoder/default.mspx
You may be able to encode as a WMV file with it then transcode back to
MPEG-2 with Movie Maker and avoid the out of sync issue. I haven't
tried, so just guessing.
