Problem with Luminance

mm2k wrote on 10/11/2002, 4:16 PM
I bought some animation clips for use with wedding footage. Many of the clips have open spaces in them intended for placing other footage behind them. The company that sells the animation offers ways to key out the black background(super black according the the company). The only problem is, its offered for Premiere, Final Cut & Avid systems, not VV3. Luminance is one of the things that is adjusted to get the desired result. For the life of me I can not find a way to do this with VV3. How do I key out the black background? Is this a control that VV3 just dosen't have? How do I resolve this probem.

Comments

FadeToBlack wrote on 10/11/2002, 5:11 PM
mm2k wrote on 10/11/2002, 6:47 PM
I wish it were that simple. When I start making adjustments to further tweak the actuall footage using threshold both video tracks fade.
FadeToBlack wrote on 10/11/2002, 7:40 PM
SonyEPM wrote on 10/14/2002, 8:36 AM
Is there an alpha channel with these clips? If they were digital media files made for keying, there should be an alpha. Go to event>properties>media> and set alpha channel to "premultiplied"- if the alpha is there, you should get a very clean key.

If the clips were originally produced for keying in a taped-based linear edit suite, you may have trouble capturing the super black, so in that case GG's method is the way to go.
mm2k wrote on 10/14/2002, 4:41 PM
I tried all of the suggestions and nothing works. I doubt the Animation clip is alpha channel supplied. However Premiere does the job right althought I really don't like using it. GG & SonicEPM thank you for you help and input.
SonyDennis wrote on 10/15/2002, 12:36 PM
If Premiere can key them, Vegas certainly can. How big are these files, I'd like to get one for testing.
///d@
mm2k wrote on 10/17/2002, 12:04 PM
The Animation clip is 156MB as a AVI file. Should I save it for sending to you in a different format? If you still want it where do I upload it to?
Control_Z wrote on 10/17/2002, 12:13 PM
You can just send him a single frame with some black and some not.

But anyway, I use a Rab-Byte super-black opening book for my weddings. You just need to re-read the manual section about keying and also learn to use keyframes. Try moving your tracks around.

Actually, I found black was a sloppy key. i.e., often there was black in the picture the book was opening on. I took the animation into something - I think Ulead's Video Paint - and manually filled each black frame with super-green (0,255,0) using flood fill. Much cleaner key.
mm2k wrote on 10/17/2002, 12:24 PM
Thanks for the info Control Z. I will try you suggestion.
SonyDennis wrote on 10/18/2002, 10:39 PM
You should keep it in the original format because changing the format might lose an alpha channel if it had one. Drop an example file here, and I'll check it out.

ftp://porker.sonicfoundry.com/
username: docdropout
password: gonefishing

Thanks
///d@