how to use DivX to compress the movie to .rmvb file

hi, i have get some movie file which is ".rmvb”
and it only have about 100Mb file size.
i find out that it have the better graphic quality than Divx ?
DO you know what type of program and codec it use?
Is it virtualDub?
i am finding how to compress the movie file to
".rmvb”.
Hope someone can tell me more about it.....
Thank..

RMVB is a Real Media format container - Real Media Variable Bitrate. It’s what you put RealVideo 9/RealVideo 10 content in. Much like you put DivX content in an AVI container.

Yes, some would argue that RV9/RV10 IS better than DivX in terms of quality per file size. It’s certainly not much worse than DivX, that’s for sure.

There are two programs that you can use to create RV9/RV10 files, which will automatically be placed in a RMVB container when done. One is commercial and the other is freeware. They are:

Real Helix Producer Plus 9.0.1 - commercial
(http://www.realnetworks.com/products/producer/)

AutoRV9 - free
(http://www.dark-angel.does.it/)

I prefer AutoRV9 for its simplicity.

A thread about RV9/RV10 created by the person who developed it:
http://forum.doom9.org/showthread.php?s=2ce1b97603f3d4973f2d3c4c534ebd54&threadid=40392

Real Alternative can be used to play RMVB files:
(http://www.free-codecs.com/download/Real_Alternative.htm)

Also if you’ve got a modified Xbox, it can play RMVB. Install the latest version of XBMC or XBMP which support it.

use XVID ou 2 passes Divx, but trash realmedia softwares & codecs ASAP !
You will only gain a few percent in size with rmvb.