FFmpeg w/ WinFF

How do I make ffmpeg create a 700mb avi file from a vob file? I've tried using the -fs setting, which does give me the approximately file size of 700mb, but cuts the video short. I also tried setting the bitrate to negative 700000, still no luck.

Code:

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-r 29.97 -vcodec xvid -vtag XVID -s 704x384 -aspect 16:9 -maxrate 1800k -b 1500k -qmin 3 -qmax 5 -bufsize 4096 -mbd 2 -bf 2 -flags +4mv+trell -aic 2 -cmp 2 -subcmp 2 -g 300 -acodec mp3 -ar 48000 -ab 128k -ac 2

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Bill

bump