how to convert to mp4

[ttunnelus]

hi,
i dunno if this is offtopic or not?
i just wanna ask
how to convert a mpg file to mp4
with software?
because i heard that files stored in mp4 can compress
4 vcd into one vcd
is that true?
can someone give me an adress that covers throughly
about mp4 format

Thanks,

[FenDers]

http://www.divx-digest.com/help.html

try that should prove to be a good starting point