Inverted color / flipped image (ProRes4444 premult in Premiere with Mac Pro 2019, metal, afterburner

[Danny68]

Pretty strange effect when viewing in Premiere and Media Encoder. (File is Prores4444 w premultiplied alpha) In premiere if I change the renderer to software ths goes away. GPU is AMD Radeon Pro Vega II 32 GB. THere is a mac Afterburner card installed. So far I see no reason to believe anything is wrong with the files. If I remove the Afterburner card all returns to normal. Also ProRes4444 with straight alpha looks normal.

 

[Sumeet Kumar Choubey]

Hi Danny68,

We're sorry about the poor experience. Please let us know the version of Premiere Pro that you are using. Also, have you made any recent changes like updating the drivers or updating the apps?

Thanks,

Sumeet

[Shun Y.]

Hi Sumeet,

I had the same experience.
It seems to occur in the case of pre-multiplied alpha.
Changing the renderer to OpenCL will fix it, but it will be abolished in the future, so I hope it will be fixed so that it can be used with Metal.
I have installed 14.9.1 and 15.2, but both are occurring.

system is below.
PC : MacPro7,1

OS : macOS 10.15.7 (Catalina)
GPU : Radeon Pro Vega II 32GB + Afterburner
Premiere Version : 14.9.1 & 15.2

Best Regards,
Shun

[Danny68]

Premiere 15.2.0

This happened on a fresh install on a new system so I had never seen the machine behave otherwise.

Update: I noticed the GPU card is not on the list of fully supported GPU's yet, perhaps in the future this issue will be fixed.

[Brandon Loshe]

I'm curious what responses and potential answers you'll get. For me, Metal never exports correctly regardless of the Premiere Pro version. I get similar results, and oftentimes green glitches in my exports using Metal, too. I haven't had luck getting responses nor answers on my posts. All that I've found is that OpenCL seems to have a better chance at working correctly. Although, I understand that OpenCL is soon to be deprecated, as noted in Premiere for the past several versions.