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Can I create a mask based off of motion…
Im sure thats a horrible way of wording my question, but heres what im trying to figure out.
I have a shot where the camera is on a tripod and no panning or zooming or anything is happening.
Then I have a hand enter the frame and then exits the frame.
My question is, is there a way to track/mask the change from the constant frame (empty) then when the hand enters the frame, to automatically mask around the change. So, can the change in the actual picture/pixels some how get masked based on a frame by frame basis, based on the empty frame…
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4 Replies
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Only if the background is a solid color like green or blue for keying. But if the background is busy with multipul colors then no. You’ll have to hand draw a mask around the hand using the pen tool, click the mask stopwatch, and then change the mask points each frame.
What is it that you’re trying to do exactly?
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Thanks for the response!
I thought I learnt what im trying to pull off in the past, but I can’t remember it and don’t know how to word it correctly.
Here are links of the shot.
1. – is the empty frame
2. 3. 4. – are the hand I want to mask aroundhttps://austinmccarthy.com/testing/SampleFootage/1.png
https://austinmccarthy.com/testing/SampleFootage/2.png
https://austinmccarthy.com/testing/SampleFootage/3.png
https://austinmccarthy.com/testing/SampleFootage/4.png -
Hey Austin,
What effect exactly are you trying to acheive here? If I know what the end result is supposed to be I may be able to help you better.
lemme know man.
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If the footage is rock solid you could try a quick test with “difference matte” under keying in the effects panel and then garbage mask the shadow but from what I can see you’re probably going to have to rotoscope that hand if you want it separately. If you have CS4 give Mocha a go.
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