Hi,
I have been doing all my tests, and having lots of fun, but find a bit of a hitch moving between editorial renders and my original 4K footage. I am testing out some scenarios where I feel the Roto-brush tool will help nicely. I make the adjustments on the editorial proxy renders, and am happy with the outcome (I do realize that in any footage replacment there will be a need for some after-the-fact fix ups) untill I replcae the footage with the corrcetly scaled 4K originals. I notice that AE then has to reconfigure each frame with the new footage. If I want to render out the proxies to use as Alpha mattes, what format should I render them to?
Do I still need high quiality intermediate codecs for ALpha channel only, especially since edge detail is important, or is there a suggested Alpha codec to use?
Thanks guys
Pierre