How to deal with this? (field misalignment)

[bin_ch]

Sorry for such a title, don't even know how to describe this. Will edit it after someone tell me what is this called.

Screenshot here:
http://img713.imageshack.us/img713/452/96938514.th.png (http://img713.imageshack.us/img713/452/96938514.png)

A clip of 5MB:
http://www.mediafire.com/?ky1hxbeba19rey0

I guess it's not interlacing (trying deinterlacing didn't give good result).
Judging from the text, it looks like two fields misplaced vertically by a small amout of pixels?

Thanks in advance.

[LogicDeLuxe]

Looks like scaled interlace material, even though the source seems to be progressive.
Well, the sharpness is gone in this process. But the artifacts can be deals with by deinterlacing the video and scale it back to the original field's heights, and then interleave the fields back to progressive frames.

[bin_ch]

Thanks for the reply, LogicDeLuxe,
but I'm not sure I agree with you for it being scaled interlace material. Look at the text which is static at the end of the clip, it's also affected, which I don't think will happen on scaled interlace material. Or am I wrong?

[*.mp4 guy]

This is a clear cut case of field misalignment. It happens when video is resized as separate fields without taking into account that when a video is stored as fields, those fields each have a unique spatial offset relative to the other. It can be fixed within the limits of linear interpolation if you know the exact way in which the misalignment was introduced, obviously such information is not usually available. Barring an exact solution you are left with various flavors of blur, which all essentially function by removing the aliased high frequency vertical information that differentiates the fields from each other.

[dansrfe]

Is there a way to test by trial and error for matching misalignment?^

[wonkey_monkey]

It looks to me like however it happened, the end result if that there are two copies of the "clean" original, offset by two pixels vertically.

David

[bin_ch]

Thanks for your replies.
But I still have no clue what I could do with it. Anyone could show me a sample script that I can play with?

[cretindesalpes]

SeparateFields ()
Spline36Resize (Width (), Height () * 2)
Weave ()
Spline36Resize (Width (), Height () / 2)

[Didée]

That's too complicated. ;)

Bob(-.6,.8)
Merge(SelectEven,SelectOdd)

You won't get it much better than that, as far as simple field juggling is concerned.