distorsion of SmoothFPS2 when ---> NTSC HD to PAS SD

[marcorocchini]

Hi ****

really this time I think IResize is problematic

so that for this C0004.MXF NTSC HD file, I would like converto to PAL SD

https://www.dropbox.com/s/scno3zjczncabq9/C0004.MXF?dl=0

I have try this script that produce excellent result ecxept any artifacts distorsion

LoadCPlugin("v:\automazioneclip\core\yadif.dll")
vid=FFVideoSource("C:\Users\Administrator\Desktop\Nuova cartella (23)\C0004.MXF")
aud=FFAudioSource("C:\Users\Administrator\Desktop\Nuova cartella (23)\C0004.MXF")        
audioDub(vid, aud)
assumeFPS(29.97002997003)              
ConvertAudioTo16Bit()
ConvertToYUY2(interlaced=true)
colorMatrix(mode="Rec.709->Rec.601") 
yadif()               
SmoothFPS2(50000,1000)        
AssumeTFF().SeparateFields().SelectEvery(4, 0, 3).Weave()
AssumeFPS(25)

plugin required:

ffms2.dll https://www.dropbox.com/s/i9xcw0304mbhd9h/ffms2.dll?dl=0
mvtools2.dll https://www.dropbox.com/s/uayb5xb6xsjcvdz/mvtools2.dll?dl=0
colormatrix.dll https://www.dropbox.com/s/zelczg9dt32h7yp/ColorMatrix.dll?dl=0
smoothFPS2.avsi (*)
IResize (*)

* slightly catMod

function SmoothFPS2(clip source, int num, int den) { 
super = MSuper(source, pel=2, hpad=0, vpad=0, rfilter=4)
backward_1 = MAnalyse(super, chroma=false, isb=true, blksize=32, searchparam=3, plevel=0, search=3, badrange=(-24))
forward_1 = MAnalyse(super, chroma=false, isb=false, blksize=32, searchparam=3, plevel=0, search=3, badrange=(-24))
backward_2 = MRecalculate(super, chroma=false, backward_1, blksize=8, searchparam=1, search=3)
forward_2 = MRecalculate(super, chroma=false, forward_1, blksize=8, searchparam=1, search=3)
backward_3 = MRecalculate(super, chroma=false, backward_2, blksize=4, searchparam=0, search=3)
forward_3 = MRecalculate(super, chroma=false, forward_2, blksize=4, searchparam=0, search=3)
MBlockFps(source, super, backward_3, forward_3, num, den, mode=0)}

SEEMS that in my files the 32 in place of 16 reduce a little distorsions lines

and the IResize:

function IResize(clip Clip, int NewWidth, int NewHeight) {
  Clip
  SeparateFields() 
  Shift=(GetParity() ? -0.25 : 0.25) * (Height()/Float(NewHeight/2)-1.0)
  E  = SelectEven().LanczosResize(NewWidth, NewHeight/2, 0,    Shift)
  O  = SelectOdd( ).LanczosResize(NewWidth, NewHeight/2, 0,   -Shift)
  Ec = SelectEven().LanczosResize(NewWidth, NewHeight/2, 0,  2*Shift)
  Oc = SelectOdd( ).LanczosResize(NewWidth, NewHeight/2, 0, -2*shift)
  Interleave(E, O)
  IsYV12() ? MergeChroma(Interleave(Ec, Oc)) : Last
  Weave()
}

seems in my files that LanczosResize in place of Spline36Resize is a little more detailed

Hoewver I don't know where to put the IResize, in the case, but in everycase I think IResize is lower quality than the Virtualdub Resizer.
So this script let output 1920x1080, and in virtualdub I set the deinterlace(doubleframerate)-->resize720x576withinterlaceflag-->andthenInterlace(evenFieldFirst)

Anyone have idea how to resolve the distorsion artifacts, also with other optical flow plugin but alwais YUY2? thanks

[poisondeathray]

Use whatever you feel works best.

Play with the settings, or use another optical flow /interpolation filter. You will ALWAYS get artifacts in some situations. Usually when objects cross over one another, rotational movements, large movements. It's impossible to get perfect motion estimation in those situations without extra help. You can mask them out with other programs, compositing, or use motion tracking / track points to refine the motion estimation, mattes to separate foreground , background. This is what is done professionally if optical flow is used. It's never used "blindly" or in batch, even in Cat studios on Cat Planet

IResize isn't used in your script that you posted (not called). You can only use optical flow on progressive video (you cannot generate new inbetween frames if video is interlaced). For the 17th time, IResize is usually used for interlaced HD to interlaced SD - notice there is no progressive state. Therefore IResize cannot be used with optical flow

I posted a workaround how you can use Optical flow (or any filter that is supposed to be 4:2:0 only) with 4:2:2 in one of your other threads. <USE CAT SEARCH>

[Cornucopia]

pdr, you and jagabo have WAYYY more patience than I could certainly muster.



Scott

[marcorocchini]

IResize isn't used in your script that you posted (not called).

because seems to me it lower a lot the quality when used with smoothfps2. Considering the 4-5 method for resizing that I know, seems to me that the when avisynth pass all the interlaced stream to virtualdub, and it deinterlace/resize/interlace ... this seems to me the way that guarantee the best quality.


Spline36Resize take too aliasing
LanczosResize take aliasing
GaussResize take too smooth and too aliasing in some points

...

the way of pass all to virtualdub for resinze is not rational and logical, but seems to me that is the best quality

IResize is usually used for interlaced HD to interlaced SD - notice there is no progressive state

________ ________
hoewver thanks poison

[poisondeathray]

IResize isn't used in your script that you posted (not called).

because seems to me it lower a lot the quality when used with smoothfps2.

Because it's interlaced. You cannot use it with smoothfps2 with IResize. Read post #2 (Again).

You can only use optical flow on progressive video (you cannot generate new inbetween frames if video is interlaced). For the 17th time, IResize is usually used for interlaced HD to interlaced SD - notice there is no progressive state. Therefore IResize cannot be used with optical flow

You cannot interpolate frames with optical flow when video is still interlaced . Got it ? OPTICAL FLOW ONLY WORKS PROPERLY ON PROGRESSIVE FRAMES

But if you deinterlace, it defeats the purpose of using IResize. You might as well use one of the deinterlace, resize , reinterlace methods (+/- low pass)

...
this seems to me the way that guarantee the best quality.
...

The only thing certain .... is there is no such thing that ensures "best" quality. Differnt settings and filters are more suited for different situations

the way of pass all to virtualdub for resinze is not rational and logical, but seems to me that is the best quality

Ok if you think so...then use it