Any way to deinterlace a resized video?

[color]

I don't know exactly when, but I did record this with a camera that had video input (digital) that could record from regular composite video. I don't know if it downscaled it first or what it did. But I didn't touch the video at all, since it was on the memory card still. (but its 640x480, 24fps, wierd cause its normaly 720x576 and 25 fps here) Anyway...

Sadly the tape does not exist anymore and this is the only copy of it, and the only film I'm in (so this means alot if its possible to somewhat save it).

VIDEO clip:
https://sprend.com/download?C=60026b08a35d4aabbcfd06c4a75d005a

When I try to deinterlace, it looks like this:
https://i.ibb.co/zsrD6Mw/vlcsnap-2022-12-11-19h55m37s864.png

[Selur]

Throw away half of the horizontal resolution and then go back to the original resolution would be the usual way to approach this.

Spline36Resize(640,240)
Spline36Resize(640,480)

[color]

Throw away half of the horizontal resolution and then go back to the original resolution would be the usual way to approach this.

Spline36Resize(640,240)
Spline36Resize(640,480)


I will try tomorrow. Thank you.

[johnmeyer]

Selur's approach will not work because when you resize interlaced video without first deinterlacing, the "teeth" artifacts are more than one field high.

I did "solve" this problem many years ago and, to my knowledge, this is still the only way to improve the look of your video. I never generalized the function, so as I describe on the third page of the thread, you'll have to change the script depending on the number of horizontal lines in each "tooth."

repair bad deinterlacing (https://forum.doom9.org/showthread.php?t=170813)

After some false starts, I begin to make progress in post #15. Post #42 is the code which I think was my final attempt at fixing the problem, although post #37 may be easier to modify.

[VoodooFX]

VIDEO clip:
https://sprend.com/download?C=60026b08a35d4aabbcfd06c4a75d005a

Can't download, you can use Wetransfer of Google drive.


Max number of downloads for file reached. Please contact the sender if you need to download the file. Sender: Anonymous user (not logged in)

[Reel.Deel]

Adding to Selur's suggestion:

FFVideoSource("044.mkv")
Spline36Resize(width, height/2)
NNEDI3CL(field=1, dh=true)
QTGMC(Preset="Slower", InputType=1)


https://i.ibb.co/FVWN21p/baddeint.png

Probably the best it's going to get.

Can't download

https://files.videohelp.com/u/223002/044.mkv

[Selur]

Selur's approach will not work because when you resize interlaced video without first deinterlacing, the "teeth" artifacts are more than one field high
works for this example for me,...
Adding to Selur's suggestion
Yes, using a better upscale and some additional cleaning will improve the result.
The general idea is to downscale the horizontal resolution so much that you lose the combing lines, and then upscale back to the original resolution.
I like the idea of johnmeyer approach, but unless someone can generalize this into a function with parameters, it doesn't really look usable to me. :)

Cu Selur

[color]

Adding to Selur's suggestion:

FFVideoSource("044.mkv")
Spline36Resize(width, height/2)
NNEDI3CL(field=1, dh=true)
QTGMC(Preset="Slower", InputType=1)


Probably the best it's going to get.[/url]


Is there any difference between NNEDI3 and NNEDI3CL? It seems like its a 64-bit and I only have 32-bit version in avisynth+ plugins installed, so I cant try this right now. But I must say it looks quite good. :)

https://i.ibb.co/7Nw5705/radera.png

there is some blended frames, but its not so often its noticed.

https://i.ibb.co/SXJVLV7/radera1.png

[kedautinh12]

It's just faster and i think no difference

[Dogway]

Maybe you can use a descaler to recover original detail.

[Reel.Deel]

Is there any difference between NNEDI3 and NNEDI3CL? It seems like its a 64-bit and I only have 32-bit version in avisynth+ plugins installed, so I cant try this right now. But I must say it looks quite good. :)

there is some blended frames, but its not so often its noticed.



NNEDI3CL works on the GPU, just replace it with NNEDI3(field=1, dh=true). There's not much you can do about the blended frames since they are "baked" into the video. Similar to when you scale an interlaced video to half the height, you get blended frames. In the sample you provided there is no fast motion but maybe you can try some deblend filters (http://avisynth.nl/index.php/External_filters#Fieldblending_and_Frameblending_removal).

[color]

NNEDI3CL works on the GPU, just replace it with NNEDI3(field=1, dh=true). There's not much you can do about the blended frames since they are "baked" into the video. Similar to when you scale an interlaced video to half the height, you get blended frames. In the sample you provided there is no fast motion but maybe you can try some deblend filters (http://avisynth.nl/index.php/External_filters#Fieldblending_and_Frameblending_removal).


I will try, but i think its baked in as you write.

Thank you all for the help! Im now able to watch the video again. ☺️

[wonkey_monkey]

works for this example for me,...

Mostly because the downscale/upscale results in a vertical blur. Just blur(0,1) (or FastBlur(0,1) ;) ) gives a similar result.

[color]

Mostly because the downscale/upscale results in a vertical blur. Just blur(0,1) (or FastBlur(0,1) ;) ) gives a similar result.

A bit, but I think it looks a bit better with NNEDI3-method, but I agree, It looks a bit similar.

[Reel.Deel]

For a sharper look you can you use DAA (http://avisynth.nl/index.php/DAA):

FFVideoSource("044.mkv")
daa().Blur(0,.25)
QTGMC(Preset="Slower", InputType=1)

Tweak blur so it gets rid the small interlaced residuals.

[kedautinh12]

AllInOne Anti-aliasing with contra-sharpening
https://github.com/Dogway/Avisynth-Scripts/blob/88d7dd948b6ce852d3c847c7ead9b0574f9b2c5d/MIX%20mods/LSharpAAF.avsi#L403

[Selur]

@Reel.Deel: nice, catch using daa() :) adding mClean after daa() also looks nice. :)

[kedautinh12]

vsmclean with bug fix from mclean
https://forum.doom9.org/showthread.php?p=1953247#post1953247

[color]

vsmclean with bug fix from mclean
https://forum.doom9.org/showthread.php?p=1953247#post1953247

Tried both, but I do get "mClean does not have a named argument "yy"".

[kedautinh12]

Tried both, but I do get "mClean does not have a named argument "yy"".

Are you got median filter??
http://avisynth.nl/index.php/Median

[color]

DAA method and NNEDI method:

https://i.ibb.co/qySzrVy/daa.png https://i.ibb.co/qY1F5vk/nnedi.png

I think NNEDI looks a bit better accouly.

[color]

Are you got median filter??
http://avisynth.nl/index.php/Median

Yes I am:

LoadCPlugin("C:\Program Files (x86)\AviSynth+\plugins\Median.dll")

EDIT: I see, I was missing "vsTCanny" and "veed" (modPlus). Now it works.

[kedautinh12]

Sr, my mistake, you need manyplus from V.C.Mohan (different median from above) :D
http://www.avisynth.nl/users/vcmohan/

[Reel.Deel]

DAA method and NNEDI method:

I think NNEDI looks a bit better accouly.


Yeah, DAA keeps more detail overall but also the artifacts. When I was messing with DAA() I used sbrV() (http://avisynth.nl/index.php/Sbr) twice on the result and got a better looking result while not loosing too much detail. I suppose denoising the DAA result using a downscaled-upscaled clip as a prefilter could yield a decent result.

[kedautinh12]

Delete modplus (oldver of manyplus) to work correctly. If error about yy still continue, you can try delete median.dll (maybe)

Edit: just read edited. If work correctly, you don't need delete median.dll

[color]

Yeah, DAA keeps more detail overall but also the artifacts. When I was messing with DAA() I used sbrV() (http://avisynth.nl/index.php/Sbr) twice on the result and got a better looking result while not loosing too much detail. I suppose denoising the DAA result using a downscaled-upscaled clip as a prefilter could yield a decent result.

Yes, that looks good. :)

https://i.ibb.co/pryLYsg/vsmclean.png

[kedautinh12]

Yes, that looks good. :)

https://i.ibb.co/pryLYsg/vsmclean.png

You can share your scripts you use?? Thanks :D

Edit: scripts not clip, sr

[color]

You can share your scripts you use?? Thanks :D

Edit: scripts not clip, sr

https://we.tl/t-IvDVk8SpS0



FFMpegSource2("video.avi")

Spline36Resize(width, height/2)
NNEDI3(field=1, dh=true)
QTGMC(Preset="Slower", InputType=1)

VSmClean()
sbrV().sbrV()