Telecide vs Decimate

[lpn1160]

Using the latest version of decomb. This is not really as much a problem as it is a "Hey why is that"?
If I use this script:
AVISource("F:\captures\howtoloseaguyin10days.avi")
#Telecide(order=0,guide=1)
The video has a very, very slightly jitter to it, however if I add #decimate() to make it 23.976fps ,the film plays as smooth as a newborns butt!!
I've always IT'd my captures and very well I might add. I was only experimenting to see a quality difference between 29.970 and 23.976.
Cap was done with picvideo mjpeg version3. cap size was 352,480 luminance was 1 and chrominance was 2. Source was s-video satellite.
I used this script to determine field order:

[v1=AVISource("%f")].converttoyuy2()
v2 = v1.subtitle(v1.GetParity()?"TF":"BF")
v3 = v2.GetParity()?v2.ComplementParity():v2
t0 = v3.ComplementParity()
t1 = t0.separatefields()
t2 = compare(t1.trim(1,0),t1)
b1 = v3.separatefields()
b2 = compare(b1.trim(1,0),b1)
return stackvertical(t2,b2)
Like I said it's not really a problem as it is I'm curious as to why it plays smoother at the IT'd frame rate than the capped frame rate of 29.970 Cap was done with vdub sych build 16297
Thanks in advance for any comments critisims and/or feedback

[Bogalvator]

Originally posted by lpn1160
I'm curious as to why it plays smoother at the IT'd frame rate than the capped frame rate of 29.970

Because the non IVTC'd clip has a duplicate every 5th frame. Step through the video in vdub after Telecide (without Decimate) and you'll see :rolleyes:

[niamh]

http://www.doom9.org/ivtc-tut.htm

plus all the docs in the decomb package. Good reading :)