Decklink Output Delay

[TestUser22542]

Hey guys,

Recently, we've faced the problem with the output delay in or application.

The Setup: I have a camera input, its coupled to my computer which has the Decklink 8k Pro card. The input signal is overlayed with an interface written in Unity, using keying mode. And the output signal is sent to a screen that displays the signal. The output can have different resolutions, based on user needs.

The problem: We have developed an application in Unity that sends an overlay to BlackMagic DeckLink 8K Pro(Keying). After this, input from the SDI port (camera) and our overlay is blended and output to an external monitor. This system has normal latency at frame rates of 60+ (approx. 80-100ms), however at around 30 fps we see very high latency of around 200ms.

I would be thankful, if you can help to solve this problem!

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