I use PSP Video 9 to convert videos, but when i try, they instantly convert to MPEG-4 AVC files and not just MPEG-4 files.

Does anybody know how to convert it just as an MPEG-4, because some of the videos don't convert properly to MPEG-4 AVC files.
But there's no sense crying over every mistake, you just keep on trying till you run out of cake.