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Using a Matte in FCP
Ok, I’m embarrassed to ask this question, but it’s been driving me crazy. I have footage of an animated truck and a b&w hold out matte for the truck. I’m trying to key out the truck so it drives over a graphic element.
I can easily do this in AVID, but am having trouble making it work in FCP. I know this is a super-simple thing, but I’ve wasted too much time trying to figure it out at this point. Does anybody know how this is done in FCP? I tried all the “composite mode” settings and also tried having the matte layer above my composite layer as well as below it.
Help!
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16 Replies
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Travel Mattes: Walter did a really nice series on them.
https://library.creativecow.net/articles/biscardi_walter/FCPTravelMat1.php
https://library.creativecow.net/articles/biscardi_walter/FCPTravelMat2.php
https://library.creativecow.net/articles/biscardi_walter/FCPTravelMat3.php
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Awesome! So simple! Haha! Thanks!
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What’s even more embarassing is that Greg (college roommate) called me and I didn’t know the answer. Now I do.
Shane
GETTING ORGANIZED WITH FINAL CUT PRO DVD…don’t miss it.
Read my blog, Little Frog in High Def -
Travel Mattes are the bees knees.
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Ok. So that works for playing footage inside a matte. I now realize I actually have a different problem. I want my truck to drive across a still frame of a logo. My 3D guy provided me the truck element and a separate matte layer (hold out) that syncs up with the movement of the truck.
In avid, I just put the two layers on the timeline and use an inverted key on the matte layer and it keys out the truck and I can see the lower layers around the truck. But that isn’t working in FCP.
Does that make sense? I’m not sure how else to describe this.
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You can put an invert filter on the matte
joe
editmojo.com -
Tried that. That was the 1st thing I did. Doesn’t work.
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[Greg Brayton] “Ok. So that works for playing footage inside a matte. I now realize I actually have a different problem. I want my truck to drive across a still frame of a logo”
So instead of putting the truck over footage, you put the truck over the logo (does the truck need to be solid or are you seeing the logo through the truck?) and then keyframe the truck across the logo.
Sorry, trying to follow you here, but we’ll get it.
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The truck starts in the middle of the frame and then pulls away to reveal the logo behind it. It’s a super-simple move, but my truck element doesn’t have a built in alpha channel. Instead I have a “matte” layer that syncs to the truck and it’s move. Does that make more sense?
On the AVID I would just apply a key to the matte layer and invert it. This doesn’t work in FCP for some reason.
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Apply a tint filter to the hold out layer and change balck to white and white to balck. That should invert it.
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