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#1 Posted : Saturday, May 28, 2022 8:39:00 PM(UTC)

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Viet Nam
Location: Hanoi

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Hi, I have a problem with the source dropped when I start recorded instant replay 3 input 4k60 ( Source Dropped )

My PC Specs:
CPU: Ryzen 5950x
GPU: RTX 3080ti
SSD: Samsung 980 1tb
Capture: Decklink 8k Pro

So, I'm looking for a System Specification for Vmix Instant Replay with 4-5 input 4k60 + 1 external 4k60. I confuse between Intel Xeon & Threadripper. If anyone has suggestion, please tell me.

#2 Posted : Wednesday, June 1, 2022 10:00:03 PM(UTC)

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Location: Cologne

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As for now, vMix by default is not able to use more than 2 cameras for 4k60 replay. So better stick to FullHD along your signal chain for 4-5 cameras in instant replay.

Also, Ryzen isn't really the best choice here in terms of pcie lanes and memory channels. You'd be better with Intel X299 and X-series Intel-Core processors. They have more pcie lanes and also more memory channels.
If you have an 30-series NVIDIA graphics-card (16 pci lanes) and 2x Decklink 8k Pro (2x 8 lanes) you are already well above the total pci-lane count of your ryzen.
So the bottleneck really would be your mobo only using a reduced amount of pcie-lanes for each card or managing all the data, prioritizing and communicating in serial. Both would be more or less suboptimal for real-time use.

GPU and RAM are well above what you need, vMix recommends a GTX 1080 ti or higher and at least 16GB DDR4 for 8 channel HD- or 2 channel 4k replay.

In addition, temperature could also be a problem, since the Decklink cards only have a maximum operating temperature of 50 °C. If you have a 3080 ti next to them blasting hot air close, that maximum temperature will be reached easily. A blower-style graphics-card would be a better in this case.

I hope I could provide some helpful information for you
thanks 2 users thanked Jaa_Han for this useful post.
Chircanu on 6/1/2022(UTC), benten2411 on 6/3/2022(UTC)
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