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Red's Motion Key Effect Creating *Two* Masks?

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Peter Moretti
Red's Motion Key Effect Creating *Two* Masks?
on May 21, 2012 at 12:21:17 pm

I am having an issue with Red's Motion Key effect where it seems to be using two masks to replace the moving image. This is causing an offset type of distortion.

I followed this Motion Key tutorial:





B/c I don't have the Artbeats source footage, I used some NTSC 720 X 480 footage that I have.

When I play the effect w/ Remove Area chosen, there is a distortion that seems to be cause by partially overlapping masks.

I remember seeing this behavior before when using the Motion Key, but didn't have the time track down the cause. I see this both when using Red as a standalone app or when launched for Avid's Media Composer.

The project is set to 720 X 480 NTSC DV. Fields is set to Lower Field. I'm using Windows 7 64-bit and Red version AvidFX 6.0.5.1097.

The attached images should illustrate what I'm seeing.


What the effect looks like:



What the Mask looks like:



What the Setup Region looks like:


General settings for the effect:


Thank you very much for the help!


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peter mcauley
Re: Red's Motion Key Effect Creating *Two* Masks?
on May 22, 2012 at 4:19:26 pm

Hi Peter,

We would very much like to work with you to resolve this - would be be possible for us to use the clip that you are using in the images that you posted? If so, please drop me a note at peterm@borisfx.com and we'll give it a shot. Assuming that it will work for us, we can then send you the .red project file so that you can see how we did it.

Cheers,

Peter.



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peter mcauley
Re: Red's Motion Key Effect Creating *Two* Masks?
on May 22, 2012 at 9:37:14 pm

Hi Peter,

The problem with this is that you need to feed the motion key filter a stabilized clip - there's just way too much camera shake in the original shot for the Motion Key to generate a good result. Here's the workflow:

• import the clip into RED
• use the optical stabilizer to stabilize the media
• render out a new stabilized clip
• import the stabilized clip into RED
• use the motion key filter to remove the person

I've sent along a RED project (privately) so that you can see how it's done.

Cheers,

Peter.



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