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Premiere CS4 – masking or cutting an object for animation
Hi
I would very much appreciate some help on this and will try to explain as clearly as possible.
Am using Premiere CS4.
My clip is of a complete black background and a person standing in the middle of the frame (there is a small spotlight on floor where he is standing but other than this complete black background.I need to be able to cut the person out and move him upwards as if he is levitating
I havent dealt with moving objects around in Premiere at all and dont know if this is possible. Would I need to use Photoshop or AE for this or is it something that can be done solely in Premiere?
I then also have two other clips, both again black background. First clip has a person on left side of the frame with complete black background. Second clip has a person on right hand side of frame again all black background. At various intervals I need to be able to have all of these people in the same clip, but will be using holographic projection so cannot use different transparencies as it will effect projection.
I know there are a lot of experts here, and I havent posted before, so hoping you will be able to help, thank you
Tash
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2 Replies
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If you had a perfectly black background and no black in the subject, you could try playing with the Luma key filter.
Odds are that you will need heavy rotoscoping, and that’s a job for After Effects.
Vince Becquiot
Kaptis Studios
San Francisco – Bay Area -
Hi Tash,
Provided your black backgrounds truly are black this can be done in Premiere.
Using the “Crop” effect you can reveal the smallest amount of needed space, the part of the video you want to keep. This allows you to crop all the shots enough so they can move over each other to create the illusion that there are multiple people on screen at the same time.
To animate them looking like they are hovering will take some time and animated keyframes on the position property. (Look up keyframes and animation for more detailed help).
Finally, I’d create a Back ground for the clips to sit over (BG clip is on Track 1 all other clips go above that and each one that is stacked on top to have multiple clips interacting at the same time will “stack” on top of each other. So if you have 3 people clips that you want to appear on screen at the same time will require 4 tracks stacked on top of each other with the BG layer being on Track 1.
There are two ways to do this. As Video will always create some kind of ‘grain’ in blacks a flat black colour might not “sell”. The first thing you could do is to crush the blacks using the three-way color corrector. Change the “tonal range” to ‘Master’ and then under that move the black triangle on the “input levels” over the right until the blacks look true black. Do this to all the clips, they might all need a slightly different amount of black input.
Last thing to do is make a New Black Video. File>New>Black Video…
When the pop up for the frame size and frame rate appears make sure they match the properties of your project (check that by selecting the sequence Icon in the project panel then right click and select the properties… Check the frame size would be some number x number DV PAL is 720×576, then check the frame rate PAL is 25fps. If the values here are the same when you make a new black video click OK.
Add this to layer 1 and all the other clips above each other starting from layer 2. The Black BG might not needed, but it’s there for safety.
Good Luck,
– JBJon Barrie
aJBprods
http://www.jonbarrie.net
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