Wiggly sections in video image caused by noise-reduction

I saw this useful link posted somewhere, somewhen, that discusses artifacts and how to identify them (useful to me as a newbie, because us newbies don’t always know the correct names of some phenomena)

http://www.michaeldvd.com.au/Articles/VideoArtefacts/VideoArtefacts.html

One of the sections discusses how noise reduction can cause parts of the image to move independently of other parts.

I’m seeing this in some of my clips, such as a cloud on the horizon doing a merry jig while its brothers remain stationary. At first I blamed it on RemoveDirt.dll, but that one is not the only filter to cause it.
Maybe I need to ease up my settings a bit.

Does anyone know of a cure, or is this just the nature of the beast?

I hope you gurus have a solution for this ---
gG

whats your source?

Vhs commercial tapes captured with a Dazzle DVC-90 USB2 device
< I know, the dregs of the capture world >

Captured in VirtualdubMod using Huffyuv codec.

I mostly see this effect in mid-to-long-range distance shots, like foliage, clouds, signs with small letters seen at a distance.
I've not found it on close-up shots, which are captured with great detail and crispness.

Any thoughts?

It sounds like you need some synchronization during the analog playback.

Do you mean something like TBC during capture?

Or "synchronization" during playback of the completed edited video?

The raw captures seem ok, just noisy and grainy.
The effect appears after applying de-noise filters.

I'll post a couple of short clips tomorrow.

Ta -

Hi jagabo.
Thank you for that very understandable explanation.

I have to 'fess up that upon more careful examination of the raw capture, I do see sections with some wriggliness <is that a legal word?> .
I guess I didn't see it before due to the combination of telecine combing, grainy noise, the speed with which I scrolled the timeline, and my tired aging eyes.

When I apply a filter, it does get more noticeable.
It would seem that I will have to live with this.
But motion hides a multitude of sins, and there are worse things in this world to worry about.

Right now I'm working with 2nd generation dubs, so I am definitely stuck with the wiggles.

I will have to start saving my pennies to budget for a TBC for future projects with retail tapes.

Many thanks for your input

gG

try that fxVHS filter for vdub...heard it works wonders
I got it but my svhs deck died

Thanks zoobie, I will give that a try too.