Small flicker - any ideas

[Akane_Tendo]

I am getting a small flicker at the top of some of my encodes using the following script. Any suggestions as to what might be causing the flickering?

loadplugin("mpeg2dec.dll")
#loadplugin("vobsub.dll")
loadplugin("decomb.dll")
LoadPlugin("c:\filters\convolution3d.dll")

mpeg2source("Fushigi Yugi 7 of 7.d2v")

crop(4,2,696,476)
Telecide(guide=1,gthresh=50,chroma=true,threshold=10)
Decimate()
#vobsub("X:\path\to\vts_01_0")
Convolution3d (preset="animeHQ")
bicubicresize(544,416,0,0.75)

[Akane_Tendo]

Well no one answered so maybe more information will help. I don't see any problem in newer anime titles. The older the title the more little glitches I get in the picture. It is rather like seeing something on a projecter and you get a hint of a flaw in a picture after it is watched a couple of times. You can still watch the movie, and even get used to the flickers, but why do so. The flickers are not on the original source material.

I am updating all of my filters tonight to make sure they are the latest and greatest. I am mostly encoding anime, though I do make the occasional movie. I like to keep backups of all my stuff as some friends are rather careless with my stuff.

Any help that anyone can suggest is appreciated.

[Belgabor]

Perhaps you could try to step frame by frame through your vid to see what's actually wrong (and perhaps post some screenshots). On what you told so far it's hard to pinpoint what's going wrong.