download virtual dub from here
*www.virtualdub.org/
downlaod divx helium codec from here
*labs.divx.com/archives/000055.html
install them
now in virtual dub
use the compressoin option
select the divx compresiion and edit the changes
make the video a little bit smaler or decrease the kbps sttream from there
or else
u could try anothr feature i.e
Overburning
How to overburn
*www.tacktech.com/display.cfm?ttid=253
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