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masking/animating

Posted: Fri, 26th Nov 2010, 2:49am

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FXhomer40781

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Is there a way with Visionlab to mask something and make it move independently on its own ... without the background moving with it?
Posted: Fri, 26th Nov 2010, 3:20am

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Axeman

Force: 17995 | Joined: 20th Jan 2002 | Posts: 6124

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SuperUser

I'm not entirely sure what you are asking, sorry, but chances are good that the answer is yes. There are two basic tools for masking, each of which serves a different purpose: Masks and garbage mattes. The specific uses for each, and the differences between them, are discussed in this knowledgebase article.

If that doesn't answer your question, please provide some more specific details about what you are trying to do. I'm pretty sure we can get you sorted, if I can just get a clearer picture of what you are after.
Posted: Fri, 26th Nov 2010, 6:00am

Post 3 of 8

FXhomer40781

Force: 1000 | Joined: 25th May 2007 | Posts: 32

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Actually, I was trying to do the scene I'd thought about doing before 'poltergeist scene' with stuff flying around. I'm attempting to do just a soda can flying on its on around a room. I saw someone do something kind of like this on youtube.
Posted: Fri, 26th Nov 2010, 6:44am

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Axeman

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SuperUser

Ok, so a garbage matte is what you would want to use there, since you just want to remove everything from the layer with the can, except the can itself, right?

Drop the layer you want to use for the can over the background, add a garbage matte, and draw it around the can. Then invert it, and you should be good to go.
Posted: Sat, 27th Nov 2010, 4:50am

Post 5 of 8

FXhomer40781

Force: 1000 | Joined: 25th May 2007 | Posts: 32

VisionLab User

Gold Member

After I add garbage matte and draw around the can and invert, whenever I drag the can I drew, the can does not move with the curser at all. The only thing that moves is the 'freehand' thing I drew.
Posted: Sat, 27th Nov 2010, 5:09am

Post 6 of 8

Axeman

Force: 17995 | Joined: 20th Jan 2002 | Posts: 6124

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SuperUser

Oh, you don't want to move the garbage matte, you want to move the layer. Use the garbage matte to remove all of the layer except the can. Once that is done, you reposition the layer using the animation tools. Any time you want to move the layer around on the canvas, you use the Animation toolset.
Posted: Sat, 27th Nov 2010, 5:23am

Post 7 of 8

FXhomer40781

Force: 1000 | Joined: 25th May 2007 | Posts: 32

VisionLab User

Gold Member

Okay, so I tried this again, and guess what? I think I finally started to figure this out! Some people on here told me I couldn't do this poltergeist scene without having the camera on a tripod, but I did. I hand held the camera and still could get the soda can flying through the air. It'll take a WHILE to do this, cause I'll have to go frame by frame. When I do the actual scene I need to do, I think I'll do equal parts/visual effects and practicals. Thanks, Axeman!
Posted: Sat, 27th Nov 2010, 6:12am

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Axeman

Force: 17995 | Joined: 20th Jan 2002 | Posts: 6124

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SuperUser

Sure thing!

It is indeed possible to do that type of scene with a handheld camera, though some people lack the patience required to get quality results. any work done frame-by-frame can take a while.

Another option for speeding things up, though, is to shoot on a tripod and add camera shake in post, after the effects have been composited in. Ideally you would shoot at higher resolution than the final project for that method, but a bit of shake can usually be achieved without too much quality loss.