Basically im using the quicktime file to be put on to a computer and read off there, not off a set top dvd player. i tried compressing the file with H.264 and a kb/s speed of 8000 but it just lost quality. so initally all i would like help with is making it run smoothly when i burn it on to a dvd so when the lecturer puts it onto his computer and sees it there it all looks fine. with the dvd authoring is that only to do with the settop dvd player? because i just need help with finding a soloution in putting it on to a computer without it becoming scratchy. I apreciate your help.