Blackmagic: DeckLink 8K Pro: f | Forum

Blackmagic: DeckLink 8K Pro: frame(s) missed

Hello everyone!

I am just starting to use Aximmetry as a Virtual Production tool and I having some issues that I'm not sure if is because Aximmetry or the Decklink (Also I'm having some Genlock problems, maybe is that...)

Let's start: I am using a 3 PTZ (Tracked cam project) in UHD with a Unreal Project. Now that everything is working, I have signal, I got tracking, etc... I have several issues that I will comment here:

1- I start the project and the first thing I realized is that I don't have G in the Genlock zone in Aximmetry, but I have it in the Decklink Ref Zone. My cameras has the Genlock too so... I'm not sure if i missing something or not.

Blackmagic: DeckLink 8K Pro: frame(s) missed

2- Then I am having the decklink problem. I am having 2160P50 Inputs and output 1080i50 (If I change to 50p I got more than 8 frames missed) that is the less frames missed that I reach but it shouldn't have any, right?

Blackmagic: DeckLink 8K Pro: frame(s) missed

My specs are:

Blackmagic: DeckLink 8K Pro: frame(s) missed +

And I am using the Aximmetry DE 2023.3.2

Maybe is some compatibility problems? Any idea will be welcome.

Thanks for everything :)

Best regards.

rodrigo__gamez

TwentyStudios

3 inputs at 4K50p is probably more than your system can handle. Even if your GPU and CPU meters are in the green, you still might over saturate your PCIe bus with the Decklink input. A Z790 has limited PCIe lanes and depending on how your system is set up you might not ever run the Decklink at 8x speed.

You probably don’t have to worry about genlocking the Decklink output. Aximmetry will genlock to the video input so everything will be in sync anyway.

Mobeon KK

Which firmware of decklink 8K pro is it? We got similar issue on the latest that is14.0, and then we downgrade it to the former one. It’s fixed.

rodrigo__gamez

Hello again,

Thanks for the replies :)

- We have change the Motherboard and it looks fine. But now we have the GPU performance at 90%-100% in red, we are working okey with that but I am afraid while the emition to have drop frames... Any Idea to improve performance?

- The Decklink Firmware is the last one, don't know exactly the ver, sorry. I will tell you later, but I think that wasn't the problem. Thanks anyways.

TwentyStudios

There are hundreds of ways to optimize your UE5 scene and none of them are specific to Aximmetry. If your scene is using Lumen and not baked lighting you could start by turning of shadow casting on lights that don’t need it. Lighting is the first thing to look into to improve performance. You could also set a console command to lower the screen percentage until you’re just below 90% GPU load.

rodrigo__gamez

I saw that the Power Options from Windows were in Balanced, turning on the High Performance option increased a lot the GPU performance so thanks anyways! :)

Going back to first point we are thinking to change again the CPU but with the project in 1080p50. Do you think it will work a 3x1080p Inputs and 1x1080p output project with a Z790 Motherboard? Same aspecs, 4090RTX, Decklink 8K, etc...

Thanks again for everything.

TwentyStudios

Ah, the power options is the first thing you should change when you install a new system.

I can’t say what difference the CPU will do. We run one 4K camera per workstation and the CPU is rarely above 40%.

Blackmagic: DeckLink 8K Pro: frame(s) missed

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