If I'm reading this properly, it sounds like you need to use a Straight -- not premultiplied -- alpha channel... and of course, you need to render in a codec that supports alpha channels.
Thanks for the response! Sorry it's unclear, I'm just not totally sure how to ask the question properly. I tried that and it doesn't seem to be working. After importing the file after exporting it that way it still came in with a white alpha channel.
I am exporting Animation mov with an alpha channel.
Oh, set it to RGB+Alpha in the Output Module.
Not Alpha -- that just makes a B&W image of the alpha channel... which is handy if the next application can't read alpha channels but can use a matte.
Use the Lossless with Alpha preset but change the color to Straight alpha. BTW, there is no difference between a zero alpha - fully opaque and a RGB only movie.
That's strange - those are the settings I've been trying with no luck. Even after using those settings when I check the alpha channel it is not totally black as I need it.
I understand that there is no visual difference, but I was told the system our network uses to feed graphics requires an alpha channel of 0 to hide the slate. They need to see the slate only in a preview monitor and have it otherwise be transparent to avoid the chance of having it pop up live.
We are running some more tests tomorrow to see if an RGB image will work, but I was told it did not work in previous tests and that it needs an Alpha channel.
Thanks again for the responses! Will give an update tomorrow.
How are you determining the alpha channel's level? Throw a black solid on the bottom layer and render and no matter what alpha channel codec that I try, the alpha is zero. Drop any video or image without an alpha in the timeline and render and the alpha is also always zero when checked in Levels, Info Panel, or on a scope.