-
rendering for an Avid with alpha??
I rendered an animation as a quicktime with animation compression with rgb+alpha. I dropped it off with the client and heard back a few days later that there was no “see through parts”. Did I do something wrong? I used Quicktime/Animation/RGB+Alpha/premultiplied. That should work right?
I don’t have the avid codec, but I read on Avid’s site that Animation codec works just fine.
Could they be doing something wrong on their end? Maybe their Avid isn’t interpreting the footage correctly? Straight Alpha vs. premultiplied?
Thanks.
-
2 Replies
-
Use straight.
-
Probably get better results with using a Straight alpha rather than a Premult (I actually think Avid will import either), but it does an much cleaner job with straight alphas just because of the nature of it.
The problem might actually lie with the user…using terminology like “see through parts” might be an indication that they are not used to working with alphas. Avid needs to be told what to do with an alpha channel on import. There are three choices Ignore (which does what it says), Use existing and Invert. Avid has it’s roots in the film world, so Black areas in an Alpha are opaque…while what we’re used to is black areas being transparent…so in most cases in order to import a graphic or video with an alpha the option to “Invert existing” will need to be checked prior to import.Erik
Reply to this Discussion! Login or Sign Up