Autoxvid question

[aswiren]

I'm running btv 4.3, and just started using autoxvid to remove commercials and encode the files into the AVI format. the xvid encoded files, though, even without the commercials, are turning out larger than the MPEG recording that i started with. my system info and autoxvid.ini follow.

also, since its not reflected in the autoxvid.ini and its probably important, AutoGK calls up virtualdub to do the encoding.

thanks for any help.

system specs:
athlon xp 4000+
2gb ram
geforce 7800gt
2x pvr-250mce
2x 250gb hd (raid 0)
winxp pro

autoxvid.ini:
[AutoXVID]
BTVRecordFolders= C:\Documents and Settings\All Users\Documents\SnapStream\Beyond TV\shows
BTVRecurseFolders= C:\Documents and Settings\All Users\Documents\SnapStream\Beyond TV\shows
OutPutSize= Quality 75%
MediaTypes= mpg, tp
CutCommercials= C:\Documents and Settings\All Users\Documents\SnapStream\Beyond TV\shows
TV= NTSC
CutProgram= ComskipX
ComSkipClip= Yes
SeriesCutExclude=
SeriesEncodeExclude=
ChannelCutExclude=
ChannelEncodeExclude=
NoEncodeAfterCut= No
Priority= Normal
MakeSubDir= No
SubDirFormat= Genre\Title
Logging= Yes
Quiet= No
Voice= Female
OutPutFolder= C:\Documents and Settings\All Users\Documents\SnapStream\Beyond TV\shows

[Episode]
EpisodeData= Yes

[SubTitles]
SubTitlesDesired= No
BurnSubTitles=
CCPath= .subtitles

[ScheduledRun]
AutoLookAhead=
AGKExecutionHours= immediate
DeleteSource= No
ShutDown= No
WaitForSmartChapters= No