What filters do I need to deinterlace this video?

[flashandpan007]

What filters do I need to deinterlace this video?
https://www.youtube.com/watch?v=ZS61kpHH-xo

[johnmeyer]

It is not interlaced. It is simply poorly-encoded, with artifacts from the badly-done deinterlacing; the badly-done re-sizing; and the poor encoding. You're not going to be able to make it look much better.

[flashandpan007]

It is not possbile to improve the quality?

Indeed I think the video has been resized, but I think it hasn't been deinterlaced, because there are so much horizontal interlacing artifacts.

[jagabo]

You can blur the residual comb artifacts but that will leave a blurry mess instead.

[flashandpan007]

Can't find a sample of residual combing artifacts. What are the problems of the video? I thought it is resized without deinterlacing and that makes is impossible to restore the original size to deinterlace it the right way. Maybe a mixture of different sources?

[theewizard]

you can try using a decimate filter in
avisynth or avidemux

[jagabo]

Since the video was resized vertically and not treated as interlaced it is not possible to cleanly separate the two fields any more. About all you can do is blend what's left of them together.

[flashandpan007]

Much better. I don't expect miracles.

[flashandpan007]

But on some points I get this with linear blending:

Maybe due to different sources of the clip?

[johnmeyer]

That's an artifact from re-sizing without first deinterlacing.

[jagabo]

But on some points I get this with linear blending:

[Attachment 35133 - Click to enlarge]
Maybe due to different sources of the clip?

You get that from a simple bilinear or bicubic filter and a clean interlaced source. VirtualDub's simple bicubic resize filter:



I downloaded the video from youtube assuming it was your source. You have a better source? Why didn't you provide that instead? If you have a good clean interlaced source use QTGMC().

[flashandpan007]

I don't have another source. I downloaded the highest resolution from youtube. The Problem is that some scenes are "fine" but other scenes look like this. I think at least two cameras were used. One was set to Interlaced, the other not or this source was deinterlaced already. What can I do to get rid of the horizontal artifacts of an kind? These are very annoying.

[johnmeyer]

Just out of curiosity, why are we trying to improve YouTube videos?? That is an endless task, with very few rewards, IMHO.

[flashandpan007]

I want to improve only this video. Because i like it, but the artifacts are annoying. It is only a try to improve that one. But it look like it is very hard, because there is already so much ****ed up.

[flashandpan007]

Why ****ed isn't written? Only stars. Nice Forum software.

[flashandpan007]

But there is the Bloodhound Gang with
Foxtrot
Uniform
Charlie
Kilo

[manono]

If you go to her Patreon site:

https://www.patreon.com/caitlin?ty=h

she says she has talented people doing the work (including the encoding for YouTube) for her. Why not volunteer to prepare the videos for YouTube since the people doing it now are incompetent. She's asking for mentors and that way you'd be sure to get the source videos with which to work.

[johnmeyer]

If you go to her Patreon site:

https://www.patreon.com/caitlin?ty=h

she says she has talented people doing the work (including the encoding for YouTube) for her. Why not volunteer to prepare the videos for YouTube since the people doing it now are incompetent. She's asking for mentors and that way you'd be sure to get the source videos with which to work.

Outstanding suggestion! That would solve the quality problem and simultaneously help out a "starving artist." Great idea.

[jagabo]

You can try playing around with this:

ffVideoSource("C:\Users\John\Desktop\Africa.mp4") 
Spline36Resize(width, height/2)
Spline36Resize(width, height*2)
aWarpSharp(depth=5)
Sharpen(0.0, 0.3)
Santiag()

The first resize blurs away most of the residual comb artifacts by reducing the image height to half. The second resize restores the original image height. The rest is attempting to restore some of the sharpness.

If you don't know AviSynth you can do something similar in other editors. Reduce the height, restore the height, sharpen a bit.

[killerteengohan]

no guarantee, but you can try this in avisynth and see if it has any effect you were hoping for.

QTGMC(preset="fast")

[jagabo]

no guarantee, but you can try this in avisynth and see if it has any effect you were hoping for.

QTGMC(preset="fast")

That will generate artifacts like in post #9. As will a simple Bob(), SeparateFields(), etc. The two fields are no longer separable since they have been partially blurred together.

[KarMa]

May consider QTGMC(inputtype=2) I've heard you can repair progressive material with interlacing artifacts, such as resized interlaced material that was never deinterlaced. Never tried it myself so idk.

http://avisynth.nl/index.php/QTGMC#Progressive_Input

Update: Downloaded the video and none of the inputtype=(1-3) helped much

[lordsmurf]

This is easy.
The VirtualDub filter "deinterlace area-based" removes most of the interlace artifacts.
Some deblending techniques in Avisynth can lessen the rest.

Or better yet, help the person out as suggested. Then you'll get the original.