[Scott Ferril]

I’m having the exact same issues. In fact, there’s a concern that Alexa footage is noisy, but instead the way after effects is interpreting the footage seems to be noisy. I’m not sure who at Adobe could address this, but it may be something to do with 10bit verses 12bit? Alexa uses 12bit color, and ProRes 4444 can be either 10bit or 12bit. Not sure what the issue is, but that’s my guess. I get the same spikes, or specs all across the picture when bringing Alexa footage into after Effects.

Also, there is a color shift, which is again why I suspect 10-12bit errors. Maybe it’s the alpha channel, not sure. Or all three combined. I’ve tried using no color space, preserving RGB in project, comp and render settings. The interpret footage says the ProRes 4444 has no color space. But even if I add one…no help.

This is not the case with other software. I have the same file keying quickly and better with the limited FCP chroma keyer. And Baselight and FilmMaster work fine.

For now, I would simply say that After Effects cannot handle proRes 4444. Hope they figure this out soon.

I have example files and renders if anyone is interested.

Scott Ferril
Editor / VFX Supervisor / Stereographer

[Scott Ferril]

Not at first, the PCIe card was a bit loose. I fixed that, at least to the point of it showing up, and the output from FCP worked. It did ask for a firmware update when I tried to use the stand alone mode to test. I did that twice and neither were clear if it update. A couple days later I tried it and it worked, no reason why, just had sat off over a couple days. Think the firmware update set in. Not sure. It seems to work now. Wish I knew what it was…

Thanks, scott