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Offsetting the video while not moving the mask
I feel really dumb right now. I haven’t been using AE for a while and can’t figure this out. I’ve been using this technique where you duplicate a layer and make a mask on eg. a wire on a sky and offset the video so I’m getting clean sky on the part I’ve masked. iQ has a DVE effect where you can move only the video or the matte or both. How can I offset the video while keeping the mask in the same place? If I change the position of the layer the mask moves with it.
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5 Replies
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You are moving with the selection (v) tool; try repositioning the layer’s time using the anchor-point selection (y) tool. As long as none of your layers are selected, the timing of the footage will change without moving any of the key frames.
Other methods:
– Use time remapping on your layer, then select both remap key frames (start and finish) and move those around as needed.
– Pre-comp your layer, choosing the option to keep all settings in your current composition. Then go into the precomp and slide the layer around to your heart’s delight!
– The clone tool (you find it as a part of the brush tool options) has a time offset feature, but of course it uses cloning instead of masks.
Ben Unguren
Motion Graphics & Editing
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I don’t want to offset the time, just the position. Precomping sounds like a solution though it’s not as WYSIWYG I’d like. I’ll try that out when I can. Thanks.
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Precomping still moves the mask around.
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I messed up. Precomp worked.
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The After Effects render order [link] is METL: masks, effects, transforms, layer styles, so your mask will always be applied before your position animation (transform).
I know you found a solution with precomping, but here’s another alternative: you could use the masked image as an alpha matte [link] above an unmasked copy of the layer. This will let you transform the layer however you like, then matte it according the mask from the duplicate (but non-animated) layer above.
Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
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