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High Sierra - RX Vega & Final Cut h.264 fix

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It is a problem with blind boot, not sure but I think that only solution is second monitor.
You can start Activity monitor and enable GPU history window to see which graphic is used more at current time, then you can see which graphic is doing what in FCP. For example on my system RX480 does skimming and stabilization and workaround 4K, and internal activates paralel with CPU when exporting, and it happens about 3 times faster than real time is (1min video on timeline exports in 20sec).
 
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You have to enable Intel graphics in BIOS (just to be enabled) and set that it is primary graphics for export of h264 to work,
How to chose it to be primary for export???

You can start Activity monitor and enable GPU history window to see which graphic is used more at current time, then you can see which graphic is doing what in FCP.
How to see which graphics is used in activity mon?
 
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I have iGPU enabled but have heard people getting BruceX scores of less than 15sec with the VEGAs. What are your thoughts?
Are you shure they exported to h264? Not ProRes (which is much faster)?

alexjibcam, i just got the same result - 14 sec on Sapphire RX 580 Nitro+ 8gb exporting to ProRes 422 rendered in project (FCXP 10.4.5 Mojave latest beta).
 
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Thank you very much for helping. THIS DID WORK and I am now able to export .H264 from final cut. The difference in the render was unbelievably fast. I used to have a GTX 1070 and now have the RX Vega 64. The GTX 1070 would take almost more than double the amount of time to render when doing the same project as the RX Vega 64.
What SMBIOS do you have?
Do you have both GPUs loaded when export (in Activity Monitor ->GPU History)?

Screenshot 2019-03-23 at 09.24.13.png
 
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Please help!!! Did everything as you wrote but it did not help. Still error 12912. What else can be done? Maybe change something with my clover configuration?
Снимок экрана 2019-05-15 в 20.25.07.png
Снимок экрана 2019-05-15 в 20.22.14.png
 
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Gigamaxx

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Update to 14.5 if it’s not fixed try emuvariableefi in Drivers64efi.
Thanks so much. But that didn't help. May be something wrong with config.plist?
 

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Thank you very much to all !! Thank you for sharing your knowledge and your time. I feel like a great family that together we make big progress and we help each other. Once again I was able to solve the problem of exporting files to mp4 thanks to you, a problem with which I have spent many hours invested. Greetings to all . :clap::clap:
 
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