Assumetff().SeparateFields().SelectEvery(4, 0, 3).Weave()

[marcorocchini]

Hi, cats


please watch my avisynth script

FFVideoSource("c:\gopr1234.mp4")
ColorMatrix(mode="Rec.709->Rec.601")
IResize(720,576)

function IResize(clip Clip, int NewWidth, int NewHeight) {
Clip
SeparateFields()
Shift=(GetParity() ? -0.25 : 0.25) * (Height()/Float(NewHeight/2)-1.0)
E  = SelectEven().Spline36resize(NewWidth, NewHeight/2, 0,    Shift)
O  = SelectOdd( ).Spline36resize(NewWidth, NewHeight/2, 0,   -Shift)
Ec = SelectEven( ).Spline36resize(NewWidth, NewHeight/2, 0,  2*Shift)
Oc = SelectOdd( ).Spline36resize(NewWidth, NewHeight/2, 0, -2*shift)
Interleave(E, O)
IsYV12() ? MergeChroma(Interleave(Ec, Oc)) : Last 
Weave()
} 
AssumeTFF()
SeparateFields()
Ev=SelectEven().sharpen(0.20)
Od=SelectOdd().sharpen(0.20)
Interleave(Ev,Od)
Weave()
Assumetff().SeparateFields().SelectEvery(4, 0, 3).Weave()

CHANGEFPS(25)
AssumeFPS(25)
ConvertToYUY2(interlaced=true)

I wonder: how I have to do in virtualdub to insert the line

Assumetff().SeparateFields().SelectEvery(4, 0, 3).Weave()

because my source is 50 fps?

[jagabo]

Use VirtualDub's Interlace filter. Progressive Frames, Even Field First.

[marcorocchini]

thanks, please consider another avisynth script:

FFVideoSource("c:\inputInterlaced1440x1080.mxf")
src = last
src = src.width>720 || src.height>608?src.ColorMatrix(mode="Rec.709->Rec.601"): src 
src.framerate<26 ? src:src.AssumeTFF().SeparateFields().SelectEvery(4,0,3).Weave() 
src.width==720&&src.height==608?src.crop(0,32,0,0):src 
ConvertToYUY2(interlaced=true)
AssumeFPS(25)
ChangeFPS(25)

now I would like to insert the line of resize 720x576

Where I have to put the resize line to avoid chroma ghost or artifarcts?

[jagabo]

I don't know exactly what you think your script is doing. But you need to resize while the video is progressive. So if it's interlaced you need to deinterlace, reszize, then reinterlace.

[marcorocchini]

I understand: and the ConvertToYUY2(interlaced=true) have to insert after or before the resize?

[jagabo]

Generally, after. But there could be situations when you do it before.