im not sure if this is in the right section... but:

i capture tv shows with my ATI tv wonder VE card using Divx5 at 300KBps.

after capturing, i edit out comercials with adobe preimiere 6. when i save, i select the video bitrate as Divx5 240kbps...

but after the files finished encoding, i check it.. i right clicked on it, selected properties, checked the summary and it showed the video bitrate as 253KBps!! i did it again but it ended up being 190KBps!

what am i doing wrong?