how much space do i need?

[vizz]

right i have a 750mb divx file, i want to right it to a vcd usind nero, i start nero up click on create vcd, drag the file over into the image, click on burn.

it tells me that it is converting video file, to mpeg-1, leave it over night come back in the morning and it tells me that i have run out of hard drive space.

thing is i have 8.7 gig free.

how much space do i need to convert the file.