Hi Jack,

 

Thanks for the tip.  Yes, the moire is on the subject’s clothing and the footage was shot with a Sony F3.  I’ll try keying it out first then lowering the resolution and see how that works.  I tried rotobrushing and adding a median blur on the clothes but the results looked ugly.  I’ll keep trying but if you or anyone have any more suggestions, I’m completely open.  There must be a way to fix it in post without completely compromising the sharpness quality.  I know reshooting with different clothes is the best way to do it but it’s footage that can’t be reshot (or cut out entirely).

 

Thanks so much!

 

Joe

 

From: After Effects Mail List [mailto:AE-List@media-motion.tv] On Behalf Of Jack Tunnicliffe
Sent: Tuesday, April 16, 2013 10:40 AM
To: After Effects Mail List
Subject: Re: [AE] Script help - moving a mask

 

Joe:

 

Are you talking about a moire in your subjects or foreground? Often there is a moire or pattern noise caused by large sensor cameras because of the enormous resolution they have which is often more than you need for an HD production. 

 

Yesterday I was working on a project shot on Epic 5K and a sweater a woman was wearing that had a certain patter that caused a moire. Often the moire shows up at a certain focal length where the pixels on the sensor match up with the pattern so zooming in our out with the camera will affect how the patterns causes noise, just like a photograph in AE that is made up of dots... at a certain scale the photo goes nuts.

 

Anyway, my fix yesterday was to change the resolution of the image and presto the moire was gone. Instead of using the full 5K image for the shot I dumbed down the image to half resolution, still more than enough for HD television and the moire disappeared. Now I did this in Davinci Resolve where I have quick access to Raw controls and resolution of the image but the same could be done in AE.

 

If this doesn't work I usually grab onto the area in question, again usually in a colour correction application like Resolve and do a slight blur of the pattern that is causing a moire. 

Jack Tunnicliffe

Java Post Production

 

 

 

On Apr 16, 2013, at 10:56 AM, "Sering, Joselito (HQP)" <joselito.sering@rhi.com> wrote:

Hello all,

I was wondering if anyone has any advice on eliminating or reducing video moiré effectively on footage with subjects shot in front of green screen like plugins or masking techniques.  It's driving us nuts.

Joe 


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