filter arrangement

[shock]

hi everyone. i am a little confused about placement of cnr2. is it best to put it before or after nr? here is the way i have it now, i was wondering if it would be better to put it before c3d or what. the source is old vhs, but it is very clean for vhs. it was passed through a tbc, and i do not like to overkill nr filters.

converttoyuy2(interlaced=true)
assumefieldbased()
assumetff()
separatefields()
odd=selectodd.cnr2()
odd=selectodd.convolution3d(0, 6, 10, 6, 8, 2.8, 0)
odd=LanczosResize(odd,352,240)
evn=selecteven.cnr2()
evn=selecteven.convolution3d(0, 6, 10, 6, 8, 2.8, 0)
evn=LanczosResize(evn,352,240)
interleave(evn,odd)
weave()

[shock]

i figured it out, after looking closely at a few samples. it appears cnr2 works best when above the nr. cnr2 is such a great filter, it really shows a great difference :)

[Wilbert]

I suspect that cnr2 isn't applied at all in your script. You had better change your script into this:

converttoyuy2(interlaced=true)
assumeframebased()
assumetff()
separatefields()
odd=selectodd.cnr2()
odd=convolution3d(odd, 0, 6, 10, 6, 8, 2.8, 0)
odd=LanczosResize(odd, 352, 240)
evn=selecteven.cnr2()
evn=convolution3d(evn, 0, 6, 10, 6, 8, 2.8, 0)
evn=LanczosResize(evn, 352, 240)
interleave(evn,odd)
weave()

[shock]

thats exactly what i did use :). except i didnt put odd and evn into c3d, and i used assumefieldbased since its interlaced.

[Inc]

As I know in avisynth AssumeFieldbased() means that the source is in a field separated state .. and yours isn't as this will be done more further in the script ;-)

[shock]

well it seems to work ok that way. so your saying even though it is interlaced and will remain interlaced that i sould use assumeframebased?

[Wilbert]

Yup. But you probably can leave it out :)

[shock]

i was allways under the impression that assumefieldbased was for interlaced stuff and assumeframepased was for progressive. i sure hope i havent screwed up my encoding is some minor way. they look just superb, youd never think that they were recorded off tv back in 1989, but it was recorded on a hifi super beta and was recorded from that to a jvc vcr with tbc built in. ive never seen tape turn out so wonderful looking. :)

[shock]

oh i think i get it now. assumefieldbased would go below seperatefields, that is correct right? i know it isnt needed, but im just wondering.

[Wilbert]

Yup.

But sometimes it also happens that you want to apply Weave on frames:

http://forum.doom9.org/showthread.php?s=&threadid=73495

Then you have to use assumefieldbased to force them being "fields", because Weave can only be used on "fields".

[shock]

but it wont cause damage to what i have allready done would it? nothing significant? im scared ive screwed up these encodes that took 24hrs each to do, and theres like 5 of them!

[Wilbert]

No it won't. Don't worry :)

[shock]

oh thank god. it just looks so good. it looks as good as some dvds ive seen, and yes i have very good eyes. :).