oh, i see. i have never done anything like your example. i have converted lots of videos, but not where it would go back in the file. yeah, i can see how you would want to slow down everything else on the system by swapping it, to get your video processed a bit faster. it's just nothing i would do. however, if i wanted to, i could just truncate a file of 6GB, add it as swap and delete it afterwards.