Select 220 WITHOUT the X. No alpha channel.
Thank you very much for your reply.
Unfortunately that didn't solve the issue, Avid is still importing with alpha.
I believe the X in 220X denotes a 10-bit as opposed to 8-bit color, I don't think it has anything to do with alpha. I think, I could very well be wrong!
Oh, this is an issue with a setting in Avid! Duh. It's either in Media Creation or Import settings. Turn off the "make the alpha channel" setting, and Avid doesn't attempt to make the Alpha channel. If it's turned on, it'll try to make an alpha channel on ANYTHING. Very inconvenient.
It's a pretty screwy way of doing things, but that's Avid for you.
That's the workaround, but that's not the standard for Avid. I've imported hundreds of clips and Avid won't import as an effect clip with alpha mattes unless the clip has an alpha channel. I've told my clients to change their import settings to Ignore alpha channels, but that's still not ideal since they shouldn't have to.
So either After Effects is mistakenly rendering out an alpha channel or Avid is mistakenly reading an alpha channel. I've tested the clips in FCP as well and since FCP recognized an alpha channel being present, I'm leaning toward After Effects as the problem.
Or my render settings are incorrect!!
Hmmmm....did you inadvertently not click the RGB+Alpha setting off? That might screw it up. Of course, the DNxHD codec is very specific and I forget if RGB+Alpha can even be turned off.
Channels was set to just RGB and Alpha was set to None.
Thank you, Dave!! I'll just have to use a different codec I suppose.
Running the outputs through MPEG Streamclip at the same settings did the trick, even though it's still an extra step.
Thank you again Dave!!
I appreciate the thanks, but let's be honest: I didn't help one bit. Sorry.