Try a script like this and use file prediction to find the optimal CQ value:
Code:
LoadPlugin("C:\encoding\mpeg2dec.dll")
LoadPlugin("C:\encoding\GripFit_preview.dll")
LoadPlugin("C:\encoding\blockbuster.dll")
LoadPlugin("C:\encoding\legalclip.dll")
LoadPlugin("C:\encoding\sampler.dll")
LoadPlugin("C:\encoding\dustv5.dll")
LoadPlugin("C:\encoding\temporalcleanerold.dll")
mpeg2Source("YourFile.d2v")
LegalClip()
GripCrop( width=352, height=288, overscan=1 )
GripSize()
SpaceDust()
TemporalCleaner()
Blockbuster(method="noise", detail_min=1, detail_max=10, variance=.8, seed=1)
GripBorders()
LegalClip()
#Sampler(length=24)
Being a 352x288 target, your CQ will be up in the 80's or 90's.
-kwag