-
Creating Freeze Frame with Alpha
I’m wondering if anybody else has this problem, and if so if they have a solution. When I create a freeze frame from a clip with alpha, I get a black shadow around it. Not a lot but enough to make it unusable. Does anybody else get this? Thanks.
-
5 Replies
-
Check how the alpha channel is being interpreted. It might have to be pre-multiplied with black.
All the best,
Tom
Class on Demand DVDs “Complete Training for FCP6,” “Basic Training for FCS2” and “Final Cut Express Made Easy”
Author: “Final Cut Pro 5 Editing Essentials” and “Final Cut Express 4 Editing Workshop” -
To get a Freeze frame with Alpha from the Canvas, you need to set the sequence with a codec supporting Alpha.
rafael -
You’ll have to post an image of what you’re doing and what’s appearing on the computer. From the description you’ve given I cannot reproduce the issue you’re having.
All the best,
Tom
Class on Demand DVDs “Complete Training for FCP6,” “Basic Training for FCS2” and “Final Cut Express Made Easy”
Author: “Final Cut Pro 5 Editing Essentials” and “Final Cut Express 4 Editing Workshop” -
I’ve never tried using a codec that supports alpha but I can still make a freeze frame from the canvas with alpha but maybe I’ll try that at some point to see if that fixes the prolbem though, regardless, I’m making the freeze frame from the viewer not from the canvas so I don’t think this should be the issue.
-
It’s not that complicated. In fact, it’s one keystroke. Shift+N. As long as you can see the alpha (checkerboard) in the canvas window, it will retain the alpha in the freeze frame. You can also press shift+n in the viewer. I’m working in SD DV NTSC btw.
If you have a slug or something underneath, well, obviously it’s going to kill the alpha.
And I’ve never had a problem with the black fringe. ALL alphas I do are straight alpha matte. No reason to do premultiplied unless you want it to also look good as a standalone piece. Premultiplied has lots of issues like the black fringe. This example is a double alpha luma matte, but an animation codec clip should work the same.
Attached is a screenshot taken right after pressing shift+N in the sequence.
Reply to this Discussion! Login or Sign Up