Green screen issues!!!!!!!

Thr3 wrote on 12/18/2003, 4:58 AM
Ok, basically i took 5 different shots in front of a green screen to create that "multiplicity" effect.........so there would be 5 of me standing around......so anyways, after i did that, i layerd all 5 videos in vegas, and after i got just two of the layers up there, and chrome keyed them out, one turned out transparent, and the other was clear as day........then its like every layer i added, made it worse and worse, very bright picture.......any suggestions on why it would do this?????

thanks


Stan

Comments

Spot|DSE wrote on 12/18/2003, 5:03 AM
You aren't getting them as clean as you think. Are you using an external or internal to preview this? You may need to render a garbage matte to make this work. If you don't know how to create a garbage matte, there is a tutorial on making one at the Sundance site, http://www.sundancemediagroup.com/help/kb
Thr3 wrote on 12/18/2003, 5:11 AM
is it titled garbage matte in the tutorials, cant seem to find it..........
williamconifer wrote on 12/18/2003, 5:13 AM
Buy Spot's book *rummages around for book* "Vegas 4 Editing Workshop". He steps you thru the process of CK and Garbage Mats.

Jack
Spot|DSE wrote on 12/18/2003, 5:33 AM
It's called Chromakey for DV or something like that. One hint, create your matte by viewing with the View Masks Only checkbox checked. That helps a lot.
williamconifer wrote on 12/18/2003, 8:09 PM
Hey Spot I got a Q for you. I followed your section on garbage matts and found when I rendered to a new track that any quick motion threw off the timing between the matt and original track. Like someone putting a hand up to their face. It was like a "green" tracer that was 1 -2 frames behind the original. I kept working in vein to cut out that extra frame or two and get them in sync but that threw off the stuff later down the line. Is that normal?

thanks
jack
Spot|DSE wrote on 12/18/2003, 8:20 PM
Nope. Not sure what you are doing there, but it should line right up exactly, as it's just a render to new track. Make sure your render settings match exactly the project settings. By default, they do. But if you've pranked with it at all...it's anyone's guess. Make sure you have Quantize to Frames enabled. (Alt+F8) Quantize to Frames didn't exist when I wrote that tutorial, I guess I should update it. Before moving anything on the timeline, RAM render that section, to be sure it's not just your proc trying to catch up.