-
Urgent Help Needed….Alpha channel issue
First of all I need to apologise because I know this will probably be posted countless time but I have an important deadline tomorrow and am too stressed.
I have created a animated graphic in After Effects which I want to import into Avid xpress and drop over the footage. Each time I render and import it places a black background behind the graphic.
I need step by step instructions on how to set this graphic to export with a tranparent background into another program
Please Help!
-
6 Replies
-
Did you render out your file as Millions of Colors+ (RGB+Alpha)?
-
Yer I did I tried it with ‘straight’ output mode
-
Hi!
What I usually do is export a jpg sequence with alpha channel activated, it will give you two sequences the original one and the alpha channel one, I don’t use Avid but I am almost sure it can manage jpg sequences as video as well as permitting you to use the alpha channel sequence to be used as a matte, I don’t use Avid but you could try this way.
Regards
Alejandro
-
Make sure you have “invert alpha” selected on your import
setting on the avid end of things.Scott Cumbo
Editor
Broadway Video, NYC -
Yes to most of the above but give yourself some slack. The section in the AE manual on alphas is long and confusing. I imagine the one in the Avid manual is, too. Read them carefully. Probably twice.
bogiesan
This is my standard sigfile so do not take it personally: “For crying out loud, read the freakin’ manual.”
-
This might help with understanding the whole alpha thing…
https://library.creativecow.net/articles/rabinowitz_aharon/straight_vs_premult.php
Aharon Rabinowitz
Email: arabinowitz (AT) yahoo (DOT) com
All Bets Are Off Productions, Inc.
Creative Cow After Effect Podcast
Internet Killed the Video Star: A Guide to Creating Video for the Web
Reply to this Discussion! Login or Sign Up