It’s easy to clone areas of a video image by creating a Matte Key within Avid Media Composer.
Watch this Media Composer tutorial on how to create a Matte Key.
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To start, select a clip segment in the timeline and then hold down the option/alt key and press the Up Arrow Twice.
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This will duplicate the clip segment on top of itself two times.
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Next, make sure the V3 track is turned on, and the Monitor Icon is placed onto the V3 Track.
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Navigate to Effects Palette and find the Paint Effect with the Image Category.
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Place the Paint Effect onto the V3 Segment within your sequence.
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Then enter into Effects Mode. This will bring forward the Effects Editor Window.
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Navigate to the Effect Editor Window and click on the Poly Tool.
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Change the Color of the Poly Tool Mask from Red to Black
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Draw a black mask around area to be cloned.
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Then, click on the reduce button in the right corner (or CMD/CTRL K) so you can see outside to visible picture area within the Composer Window.
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Navigate back to the Effect Editor Window and click on the Rectangle Tool. Change the color of the Rectangle Tool to White. Draw a white square around the entire visible picture area.
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After you Draw the Mask, it will cover over the Black Shape that you made earlier. Click on the Send Backward button within the Effect Editor Window
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The end result with be a Black and White Matte.
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Navigate back to the Effect Palette, and find the AniMatte Effect within the Key Category.
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Hold down the ALT/OPTION key and drag the AniMatte effect onto the clip segment that’s on V3.
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The last step is to resize your Matte within the Composer Window. That’s it!
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