Filtering avi problem

[Flipp]

Whenever I try to filter avi files with virtualdub they stop at the 4 mins,3 mins etc. mark.Why does the files get so big,for example 4 mins of the video is 4GB or more?
How can I filter avi files an get the same size or maybe a little bigger?
I just want to resize avi files to smaller pixels and get rid of macroblocks.I'm talking about 700MB and 500MB avi files.

[benderman]

You need to selct and configure a codec for video-compression in fulkl-processing-mode. Else VD will save the video as uncompressed RGB-video which may be VERY big.

[Flipp]

Thanks man.