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QT Animation+Alpha and Matte Key fun
After a three year hiatus to FCP I’m back on Avid. The transition back isn’t nearly as bad ad going from Mac back to Windows. Anyway there are a few things I used to do in FCP that I can’t figure out how to do in Avid and both have to do with Quicktime Animation Codec movies with embedded Alpha channels.
So, I have this Lw3rd provided by the client. It animates on but not off. So I want to take the first 10 frames reverse it and put it at the end to make an animate off. The problem is that when I double click with the Lift tool and apply “Reverse Motion” to both the fill and the matte layers the matte layer gives me the “Wrong Format” error and the key gets all messed up. Does anyone know how to do this in the Avid (MC 2.8.1)?
Also, in FCP I used to use the Travel Matte: Alpha transfer mode to “steal” the alpha channel from the Lw3rd and use it wipe the text on and off. It would be something like this: v1 video clip, v2 lw3rd QT+Alpha, v3 lw3rd QT+Alpha, v4 Text layer with Travel Matte: Alpha selected. How would I go about doing something like this in Avid (MC 2.8.1)?
Thanks in advance for all your help.
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1 Reply
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Trying to apply the Reverse Timewarp effect on the lower third won’t work because it’s locked (if it was imported as an animation with alpha). To get around it, do this:
Lay the lower third into your timeline, say on V2.
Step into the effect, select the 10 frames you want to reverse, and hit Control+C (or Apple+C on a Mac, I believe) to load those 10 frames into your source monitor. It will load them as two seperate tracks–Matte and Fill.
Cut them at the end and after the lower third with fill on V2 and Matte on V3. This will “unlock” the matte key effect by creating seperate fill and matte layers, as if they’re seperate video tracks.
Apply a Reverse Timewarp effect on both the Matte and Fill.
Select both V2 and V3 and collapse them. This will give you one track on V2 with a Submaster effect on top.
Drag (don’t Alt+Drag, just Drag) a matte key effect on top of the Submaster effect. It will replace the submaster with the matte key and use the nested Matte over the Fill while maintaining the Reverse Timewarp effects.
After this, I would create a Subsequence out of the Lower Third and Reverse Lower Third so you can just load it into your source monitor and cut it into place everytime you need it. Saves you time down the line.
Let me know if this works. You might need to make a video mixdown of the Reverse Timewarp effects before you collapse them, but I think this will work.
Michael.
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