Reducing the ghost-effect

[ookzDVD]

Dear forum,

Since all my material is in NTSC-interlaced format,
so I have to perform de-interlace and I could encode them in
progressive mode.

So far I use SmartDeinterlace with default setting which
GordionKnot generate the script for me.

As the result is I always got the ghost-effect,
so the question is what is the best way (filter) to reduce
the ghost-effect since to remove it is "impossible".

Thank you.

[DJ Bobo]

You're using the wrong filter.

You should use Inverse Telecine to get progressive, smooth and ghost free 24fps output:
1) Use IVTC2.2 with the following setting:
ivtc(32,11,120)
2) Or use Decomb with the following setting:
Telecide()
Decimate(cycle=5)

[Pko]

I think that bobotns' solution will work very well but ONLY if your material is FILM (that is, 24fps, for example from movies, converted to NTSC by telecining)

If it is not so, I think the better solution is using decomb with simply FieldDeinterlace(). It works very well for me with default settings, but there are some parameters to change is you wish to do some experimentation; read the docs in that case.

Usually, a little ghosting will remain but usually is very bearable.

[Mentar]

If you really really don't want any ghosts, you should run decomb with the blend=false setting in the Telecide call. Because sometimes the "ghosts" are in fact blended frames to enable a kind of half-motion.

Typical anime setting would be this:

Telecide(blend=false,guide=1,gthresh=50,threshold=30)
Decimate(cycle=5)

[ookzDVD]

@ bobotns,

Thank you,
I think my source is not from FILM, it's purely interlaced,
'cause when I look at from VDub, frame by frame, all are interlaced.

@ Pko,

Yes, I've tried use decomb, but I found the quality is a little bit
blurry than use SmartDeinterlace, but I'll learn more.

@ Mentar,

Thank you, but it will be dropped to @25 isn't it ?
And it's not anime. But thank you again.

[hakko504]

Greedy also seems to produce ghost-free de-interlacing with
GreedyHMA(1,0,0,0,0,0,0,0)It is not distinctly better than smartdeinterlace (or Decomb) in interpolation mode but is absolutely worth a try for most sources.

[ookzDVD]

hi Hakko,

Thank you again, I still remember your tips for SmartDeinterlace,
it seems useful for me. Thank you again.