Using filters that do not support interlacing (on interlaced material)

[ariga]

Is it possible to apply filters that do not support interlacing on interlaced material?

For interlaced PAL-DV, I am guessing:
SeparateFields()
top=SelectEven()
bottom=SelectOdd()
top=top.Filter1()
bottom=bottom.Filter1()
top=top.Filter2()
bottom=bottom.Filter2()
...
Interleave(top,bottom)
Weave()

Or is there a better/simpler way ?

Any filters that wouldn't work correctly this way, other than resizing?

[R3Z]

Easiest way i know is to dumb bob (without Motion compensation);

Bob(0,0.5)

Apply filters

Then re-interlace;

SeparateFields().SelectEvery(4,0,3).Weave() # bff
or
SeparateFields().SelectEvery(4,1,2).Weave() # tff

Thanks go to Didee for teaching me this.

[foxyshadis]

One option is to use:

function myfilters(clip c) {
c.stuff().morestuff()....
}

separatefields
interleave(selecteven.myfilters,selectodd.myfilters)
weave

Besides resizing, I can't think of anything that causes strange artifacts when always using its own fields, though denoising may occasionally be a little too strong.

[Leak]

One option is to use:
Besides resizing, I can't think of anything that causes strange artifacts when always using its own fields, though denoising may occasionally be a little too strong.
Well, since you're working on half-height fields that way the filter's radius will be twice as high vertically. That might be something to consider...

np: Tocotronic - Superpitcher/Wassermann Maxi Mix (Pure Vernunft Darf Niemals Siegen / Remixe)

[ariga]

Thanks for the replies.
One option is to use:
Besides resizing, I can't think of anything that causes strange artifacts when always using its own fields, though denoising may occasionally be a little too strong.Well, since you're working on half-height fields that way the filter's radius will be twice as high vertically. That might be something to consider...
Would bobbing as suggested by R3Z above help to reduce such artifacts?

[foxyshadis]

Sure, but the only reason you split into even/odd like this is speed, and bobbing removes that advantage. I don't think double-height denoising can cause "artifacts" unless you use extremely strong settings, it just changes the nature of the effect sometimes. Different can be good or bad or irrelevant, give it a shot and see if it bothers you.

[Serbianboss]

Sorry for maybe offtopic, but can we use filters like frfun7,peachsmoother and other non interlaced filters with this script:


AVISource("C:\movie.avi")
ConvertToYuY2(interlaced=true)

SeparateFields()
odd=SelectOdd.##here goes frfun7, peachsmoother,convolution3d,fluxsmooth or other non interlaced filter
evn=SelectEven.##here goes frfun7, peachsmoother,convolution3d,fluxsmooth or other non interlaced filter
Interleave(evn,odd)
Weave()


This script is actual for convolution 3d, so can be this used for another non interlaced filter on interlaced material.