Yes it is. A good program to use for that is Autogk You can get it at the link below. http://www.autogk.me.uk/
btw try to get good codecs, like divx. www.divx.com it already comes with xvid, but i prefer divx compression alot better.
Thank you for your reply excuse my ignorance when i downloaded autogk i seemed to have got 3 programmes avisynth 2.5 and Vob Sub. Also it appears this will download AVI files in MPEG4 format. Could you tell me if this is compatable with a programme i have arc soft video impression2 which i use to edit a lot of videos. Thank you