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Timeline duration of garbage mattes

Posted: Tue, 14th Dec 2004, 12:31am

Post 1 of 6

SFX-Spaz

Force: 460 | Joined: 7th Jun 2003 | Posts: 100

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I am having trouble trying to achieve a certain effect with garbage mattes. I can't figure out how to make a garbage matte end at a certain point. I have a complex set-up of mattes, but they all overlap over each other. I want to be able to control when certain garbage mattes show up, and when they shouldn't. How can I do this?

I'm sorry if I'm missing something obvious.

Thanks,
Johnny
Posted: Tue, 14th Dec 2004, 12:39am

Post 2 of 6

Brettsta

Force: 3385 | Joined: 15th Nov 2003 | Posts: 2114

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MAybe what you want to use is a mask. You can find masks in the media browser. Drag it over you footage and you must select that and the clip you want it to apply to and right click and link it. You can control when masks start and end.
Posted: Tue, 14th Dec 2004, 12:42am

Post 3 of 6

Serpent

Force: 5426 | Joined: 26th Dec 2003 | Posts: 6515

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Your starting point and end point must meet to close the matte. It will turn a transparent red. I think this is what you are talking about.
Posted: Tue, 14th Dec 2004, 1:40am

Post 4 of 6

Simon K Jones

Force: 27955 | Joined: 1st Jan 2002 | Posts: 11683

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FXhome Team Member

Garbage mattes last for the entire duration of an object, as they are linked directly to it. If you want to control a mask indepedently, use the standalone mask system (drag the default mask object from the media browser onto the timeline and treat it like any other clip).

Alternatively, if you have several mask shapes within a single mask/gmatte, and you want one to 'end', simply drag it right off the canvas. By sure to watch the tweening to ensure that it goes straight from it's final position to off-canvas, otherwise it'll just animate smoothly off the frame, which would look a bit funny. smile

Let us know if you have any probs.
Posted: Tue, 14th Dec 2004, 3:34am

Post 5 of 6

SFX-Spaz

Force: 460 | Joined: 7th Jun 2003 | Posts: 100

EffectsLab Lite User Windows User

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Thanks for your replies.

I seemed to have the most luck with your suggestion, Tarn. I was probably doing something wrong, but the mask didn't seem to work the same way as a garbage matte. I had it linked to the clip I needed it to be linked to, but I couldn't seem to get what I wanted. Taking the garbage mattes off screen was the simplest and most effective solution.

Thanks for the quick replies,

Johnny
Posted: Tue, 14th Dec 2004, 10:47am

Post 6 of 6

Simon K Jones

Force: 27955 | Joined: 1st Jan 2002 | Posts: 11683

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FXhome Team Member

Masks do indeed work differently to garbage mattes.

Gmattes are directly attached to their host object. If you animate or move the object, the gmatte will move in perfect sync with it. This makes gmattes perfect for helping to remove unwanted areas of an image or tidy up the keying.

Masks, on the other hand, are their own objects on the timeline, and will stay put exactly where they are unless you tell them otherwise. This makes them very useful for applying to multiple objects and using to create depth in a shot.