Help De-interlacing DVD correctly and fixing aspect ratio

[clashradio]

or change the order

LWLibavVideoSource("VTS_01_1.VOB")
assumeTFF()
Telecide(back=1,guide=2,post=0).Decimate(cycle=25)
bob().srestore(frate=24)  #removes the ghosts

Yeah that works for the ghosting, much appreciated. Thanks Sharc.

I still have the issue with odd frames being removed as mentioned in #18. Any work around that please ?

Hi Sharc,

Is it the (bob) or the Telecide(back=1,guide=2,post=0 that helps with ghosting?

[Sharc]

or change the order

LWLibavVideoSource("VTS_01_1.VOB")
assumeTFF()
Telecide(back=1,guide=2,post=0).Decimate(cycle=25)
bob().srestore(frate=24)  #removes the ghosts

Yeah that works for the ghosting, much appreciated. Thanks Sharc.

I still have the issue with odd frames being removed as mentioned in #18. Any work around that please ?

Hi Sharc,

Is it the (bob) or the Telecide(back=1,guide=2,post=0 that helps with ghosting?

- Telecide() or TFM() matches the fields of telecined or phase-shifted video
- Decimate() or TDecimate() removes duplicates (which may result from the fieldmatching)
- bob().sRestore() removes ghosts from blended fields (typically originating from framerate conversions)
All of these filters have settings to optimize their effectiveness, depending on the source
https://www.rationalqm.us/decomb/decombnew.html
http://avisynth.nl/index.php/Internal_filters
http://avisynth.nl/index.php/External_filters
http://avisynth.nl/index.php/TIVTC
http://avisynth.nl/index.php/Srestore

[clashradio]

or change the order

LWLibavVideoSource("VTS_01_1.VOB")
assumeTFF()
Telecide(back=1,guide=2,post=0).Decimate(cycle=25)
bob().srestore(frate=24)  #removes the ghosts

Yeah that works for the ghosting, much appreciated. Thanks Sharc.

I still have the issue with odd frames being removed as mentioned in #18. Any work around that please ?

Hi Sharc,

Is it the (bob) or the Telecide(back=1,guide=2,post=0 that helps with ghosting?

- Telecide() or TFM() matches the fields of telecined or phase-shifted video
- Decimate() or TDecimate() removes duplicates (which may result from the fieldmatching)
- bob().sRestore() removes ghosts from blended fields (typically originating from framerate conversions)
All of these filters have settings to optimize their effectiveness, depending on the source
https://www.rationalqm.us/decomb/decombnew.html
http://avisynth.nl/index.php/Internal_filters
http://avisynth.nl/index.php/External_filters
http://avisynth.nl/index.php/TIVTC
http://avisynth.nl/index.php/Srestore

Thank you. I have trouble with ghosting sometimes. I'm sure this will help

[Sharc]

or change the order

LWLibavVideoSource("VTS_01_1.VOB")
assumeTFF()
Telecide(back=1,guide=2,post=0).Decimate(cycle=25)
bob().srestore(frate=24)  #removes the ghosts

Yeah that works for the ghosting, much appreciated. Thanks Sharc.

I still have the issue with odd frames being removed as mentioned in #18. Any work around that please ?

@akuma786: If you are still here take a look at this post for inserting interpolated frames. Applied to frame 141 of your clip:

[johnmeyer]

I have been meaning to try applying what I suggested earlier in this thread. I did briefly try my various automatic scripts for detecting and correcting field shifts (which is one aspect of the problem) as well as detecting and then dealing with duplicates. The section between frames 563 and 575 is the easy place to figure out the automatic fix. If I get time, I may try to do it, even if the OP has moved on.

[johnmeyer]

This simple script seems to detect and correct the field reversal. It uses the old MugFunky "FillDrops" function to take care of the duplicate which happens at each point where the fields reverse.

This is the result:

Automatically Detect and Correct Field Reversal

#Detect and correct field reversal
#John Meyer March 21, 2026

Loadplugin("E:\Documents\My Videos\AVISynth\AVISynth Plugins\plugins\MVTools\mvtools2.dll")

#Modify this to point to the video file you use. 
src = AVISource("E:\fs.avi").ConvertToYV12()

# Start by assuming TFF 
clip = src.AssumeTFF()

# Use TFM in debug mode to detect combing
tfm = clip.TFM(mode=2, debug=true)

# Conditional: if combing detected, flip field order
# Change test from 5.0 to something else, if needed

ScriptClip(tfm, """
  c = YDifferenceToNext()
  c > 5.0 ? last.AssumeBFF() : last
""")

filldrops ()

#-----------------
#Begin functions

#Function which detects duplicate frames and fills one of those frames with 
#a motion estimated frame. This function (unlike my modified one below) is
#hard-wired with a detection threshhold of 1.1. I was too lazy to correct this

function filldrops (clip c)
{
  super=MSuper(c,pel=2)
  vfe=manalyse(super,truemotion=true,isb=false,delta=1)
  vbe=manalyse(super,truemotion=true,isb=true,delta=1)
  filldrops = mflowinter(c,super,vbe,vfe,time=50)
  fixed = ConditionalFilter(c, filldrops, c, "YDifferenceFromPrevious()", "lessthan", "1.1")
  return fixed
}


#Same as FillDrops, but for interlaced video

function filldropsI (clip c, float "thresh")
{
  thresh = Default(thresh, 0.1)
  even = c.SeparateFields().SelectEven()
  super_even=MSuper(even,pel=2)
  vfe=manalyse(super_even,truemotion=true,isb=false,delta=1)
  vbe=manalyse(super_even,truemotion=true,isb=true,delta=1)
  filldrops_e = mflowinter(even,super_even,vbe,vfe,time=50)

  odd  = c.SeparateFields().SelectOdd()
  super_odd=MSuper(odd,pel=2)
  vfo=manalyse(super_odd,truemotion=true,isb=false,delta=1)
  vbo=manalyse(super_odd,truemotion=true,isb=true,delta=1)
  filldrops_o = mflowinter(odd,super_odd,vbo,vfo,time=50)

  evenfixed = ConditionalFilter(even, filldrops_e, even, "YDifferenceFromPrevious()", "lessthan",  String(thresh))
  oddfixed  = ConditionalFilter(odd,  filldrops_o, odd,  "YDifferenceFromPrevious()", "lessthan",  String(thresh))

  Interleave(evenfixed,oddfixed)
  Weave()
}

[Sharc]

Oh yes, thanks, I remember the discussions and links here. So the OP has a full arsenal for addressing his issues - if he returns

[Akuma786]

Hi yeah I tried everything so far, almost gave up.@Johnmeyer I've tried your script above, it seems to work on that segment (between frames 563 and 575) you mentioned but there's many other scenes that it doesnt fix automatically. I noticed on other scenes if I change :AssumeTFF() to AssumeBFF() it fixes some but for others I have to change back to AssumeTFF(). Dont know what else to do.

[Akuma786]

Here is a short clip:https://www.swisstransfer.com/d/f5c80775-3e2c-424d-a1a5-23b43d57996d

If i use your script you'll see some parts are not fixed until I change line 10 from AssumeTFF() to AssumeBFF()

Here is the script, maybe I'm doing something wrong in script:

#Detect and correct field reversal
#John Meyer March 21, 2026



#Modify this to point to the video file you use. 
src =  LWLibavVideoSource("G:\future projects\Dance of the Drunken Mantis proejct\NEW SAMPLE\VTS_01_1.VOB").ConvertToYV12()

# Start by assuming TFF 
clip = src.AssumeTFF()

# Use TFM in debug mode to detect combing
tfm = clip.TFM(mode=2, debug=true)

# Conditional: if combing detected, flip field order
# Change test from 5.0 to something else, if needed

ScriptClip(tfm, """
  c = YDifferenceToNext()
  c > 5.0 ? last.AssumeBFF() : last
""")

filldrops ()

#-----------------
#Begin functions

#Function which detects duplicate frames and fills one of those frames with 
#a motion estimated frame. This function (unlike my modified one below) is
#hard-wired with a detection threshhold of 1.1. I was too lazy to correct this

function filldrops (clip c)
{
  super=MSuper(c,pel=2)
  vfe=manalyse(super,truemotion=true,isb=false,delta=1)
  vbe=manalyse(super,truemotion=true,isb=true,delta=1)
  filldrops = mflowinter(c,super,vbe,vfe,time=50)
  fixed = ConditionalFilter(c, filldrops, c, "YDifferenceFromPrevious()", "lessthan", "1.1")
  return fixed
}

Crop(10, 4, -8, -0, align=true)
Spline36Resize(704, 284)

[Sharc]

deleted; double post

[Sharc]

If i use your script you'll see some parts are not fixed until I change line 10 from AssumeTFF() to AssumeBFF()

Here is the script, maybe I'm doing something wrong in script: ....

I didn't try, but as with all threshold based decisions you may not just copy the script 1:1. One usuallly has to adjust the decision thresholds to the particular source for best results.

[Sharc]

Or try, (similar to above):
The script removes most ghost, returning 25fps, preserving the original number of frames (624) with some duplicates. Then duplicates and near duplicates get substituted by motion interpolated frames (labelled "interpolated" for demo). As the number of frames is preseved the audio should stay synched.

LWLibavVideoSource("VTS_01_1.VOB")

#ghosts removal
QTGMC(preset="fast").SRestore(frate=25)

# followed by replacement of remaining dupes (or near dupes) by motion interpolated frames
# script based on a proposal by jagabo
thresh=2.2 #sensitivity for dupes recognition; adjust as needed
alt = DoubleFPS_RIFE().SelectOdd() # double frame rate, keep only the newly interpolated frames
alt=alt.subtitle("interpolated",size=24) #for debugging only, disable for real use case
test = mt_lutxy(last, last.Loop(2,0,0),"x y - abs", chroma="-128") # abs diff between frames, for duplicate detection
ConditionalFilter(test, alt, last, "AverageLuma", "lessthan", "thresh") # replace nearly identical frames with the motion interpolated frames

AssumeFPS(24.0, synch_audio=true)  #slowdown if really needed


function DoubleFPS_RIFE(clip source)
{ 
    source.z_ConvertFormat(pixel_type="RGBPS", colorspace_op="709:709:709:l=>rgb:709:709:f")
    Rife(model=12, sc=true, sc_threshold=0.10)
    z_ConvertFormat(pixel_type="YUV420P8", colorspace_op="rgb:709:709:f=>709:709:709:l")
}

[Selur]

just for fun I used QTGMC(preset="fast") + sRestore(frate=25) + SeedVR2,...

[johnmeyer]

My script worked fine on the two sections that others had identified and which I also easily found. I did not, however, walk through the entire clip frame-by-frame. As others have suggested, you may need to "tune" the script by adjusting the threshold ("c > 5.0").

[Akuma786]

Thanks Sharc that works alot better overall. Yeah johnmeyer I tried adjusting threshold coudnt get it to improve other section of movie. I like the upscale Selur, what parameters, settings you used on SeedVR2, I would like to replicate the same results please. I have downloaded ComfyUI and SeedVR2.

[Selur]

Here is an export of the settings: https://pastebin.com/dpkPcqsu
should be near the defaults, aside from using ffv1 as output.

Cu Selur

[Akuma786]

Thanks Selur, will test it out. Much appreciated.

[Selur]

Much fun, but be aware diffusion based upscalers like SeedVR2 or Topaz Starlight are really slow.