removing interference

[John Rofrano]

Do you mean problems with Interlaced footage?

I’m not sure what “interference ” you are talking about.

~jr

http://www.johnrofrano.com
http://www.vasst.com

[Grzegorz Kwiatkowski]

Maybe I used a wrong word for this. When you film a surface/texture of an object that has lines very close one by one, you get this effect. They start to pixelate and interfere wich one another.

[Grzegorz Kwiatkowski]

John,

below is the snapshot of footage I am talking about. Horizontal lines (stairs) in the background are interfering causing pixel-like effect. I had to exchange this take because technical checking at tv channel rejected this.

I know there is a specially dedicated filter for this, at least for Final Cut.

thanks

[John Rofrano]

This can happen when you are shooting interlaced video and the lines and thinner than two fields which will cause them to flicker. You can right-click on the event and go into the Properties and enable Reduce Interlace Flicker and see if that fixes it. if not, you can try adding a slight Gaussian blur in the vertical direction only and see if it reduces it.

~jr

http://www.johnrofrano.com
http://www.vasst.com

[Grzegorz Kwiatkowski]

Both solutions don’t work. I’ve just checked it. I know there’s a filter for this in Final Cut.

[Bouke Vahl]

This is called moire.
You can make a matte (or soft wipe) for the affected area and put a bit of blur on the spot.
That takes care of it.

Bouke

https://www.videotoolshed.com/
smart tools for video pros

[John Rofrano]

[Bouke Vahl] “This is called moire.”

Ah… Vegas doesn’t have a moire filter. What would the matte look like that would remove it?

~jr

http://www.johnrofrano.com
http://www.vasst.com

[Bouke Vahl]

You did not get it.
A blur gets rid of the moire.
But you don’t want to blur the entire image, thus:
Create a matte, or wipe, to select the affected area, and apply the blur only there.

And to see the moire it’s best to switch to composit on your client monitor. The limitations of composit video (as in SD broadcast) make it way worse than on a computer monitor or watching component / SDI.

Bouke

https://www.videotoolshed.com/
smart tools for video pros

[John Rofrano]

[Bouke Vahl] “You did not get it.
A blur gets rid of the moire.
But you don’t want to blur the entire image, thus:
Create a matte, or wipe, to select the affected area, and apply the blur only there.”

Ah… yes. I get it now. The matte is just to limit what gets burred. Of course. 😉

~jr

http://www.johnrofrano.com
http://www.vasst.com