MVBob no longer seems to work for me with my current set up

[Clown shoes]

I Haven't needed to do any standards conversions for a while, but now the need has returned my script doesn't appear to be working! I am using the latest mvbob script from Scharfis site, with this script;

import("C:\Program Files\AviSynth 2.5\plugins\mv\mvbob.avs")
aviSource("F:\SC\Test\Test1.avi",audio=false)
mvbob()
vvbw=MVAnalyse(truemotion=true,blksize=8,delta=1,pel=2,isb=true,idx=3,chroma=true,sharp=1)
vvfw=MVAnalyse(truemotion=true,blksize=8,delta=1,pel=2,isb=false,idx=3,chroma=true,sharp=1)
vvbw2=MVAnalyse(last.Crop(4,4,-4,-4,true),truemotion=true,blksize=8,delta=1,pel=2,isb=true,idx=4,chroma=true,sharp=1)
vvfw2=MVAnalyse(last.Crop(4,4,-4,-4,true),truemotion=true,blksize=8,delta=1,pel=2,isb=false,idx=4,chroma=true,sharp=1)
MVFlowFPS2(last,vvbw,vvfw,vvbw2,vvfw2,idx=3,idx2=4,num=60000,den=1001)
converttoyuy2()
lanczos4resize(width,480)
assumetff().separatefields().selectevery(4,0,3).weave()

If I try playing it with media player classic the filters being used are the MPEG2 demultiplexer and the mainconcept h264 decoder. Filtergraph also reports the use of the MPEG2 demultiplexer. If I load it into virtualdub, the correct frame size and frame rate are reported but the number of frames and running time are off the chart. The number of keyframes is reported as zero.

I clearly have a configuration problem, but I can't think what to do to fix it. Can anyone point me in the right direction?

[Pookie]

Could be your version of MVtools is too new. IIRC, Mvbob runs on pre 1.0 releases of mvtools. Might be bumping into the MVtools that is doing your frame rate change. Of course, I could be very wrong....

[Clown shoes]

I don't think that's the problem. I've managed to find the same mvbob script I was using before and the same mvtools. The script loads without error but there is no video. Very strange!