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Applying motion effect to quicktime movs with Alpha
I rendered quicktime movs incl. alpha channel with the Animation codec from After Effects. I imported these clips into Avid…everything looks fine….but it won’t let me apply the motion effect to these matte key clips…Is there another way to apply time remapping in Avid? Will different settings make it work?
I am working on Win Avid Xpress Pro.
Thanks for any help!
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6 Replies
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Here’s what you need to do.
1. Put your movie with alpha into your timeline–say V2.
2. Step into the movie, highlight the alpha track and copy it to your clipboard.
3. Step out of your effect. Hit the Remove Effect key to get rid of your matte key effect on your movie with alpha (on V2). This will leave you with just the fill.
4. On V3, cut in the alpha you copied earlier.
5. Speed up the fill (now alone on V2) and copy the speed effect onto the alpha on V3. Voila! Sped up movie with alpha (the alpha is simply on a different track).Michael
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Or… quick & dirty, mixdown the QT & do the motion effect on the mixdown.
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But won’t that destroy the alpha? I assumed bonnfox wanted to speed up just the quicktime with alpha to avoid rerendering it in whatever program it was created in. Plus, if it was going over another shot and you mixed everything down the motion effect would speed up the background too. Or is there a way to make the mixdown retain alpha info?
Mike.
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ahh, I didn’t think of that because if it were me I’d just make the speed adjustment in AE instead of monkeying around trying to figure out other ways in Avid :-\ It was hard to guess exactly what he was trying to accomplish.
Bill
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I agree with you–I’d just import the rendered clip into AE, throw on a time remap and rerender. It would be a lot faster than the way I suggested, but now the original poster knows how to time remap with alpha!
Mike.
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… in theory. He hasn’t replied since his initial post 😀
Bill
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