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benten2411  
#1 Posted : Saturday, May 28, 2022 8:39:00 PM(UTC)
benten2411

Rank: Newbie

Groups: Registered
Joined: 3/12/2020(UTC)
Posts: 4
Viet Nam
Location: Hanoi

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



My PC Specs:
Mobo: GIGABYTE B550 VISION
CPU: Ryzen 5950x
GPU: RTX 3080ti
RAM: 64GB
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.

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

Rank: Member

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Joined: 8/20/2021(UTC)
Posts: 13
Germany
Location: Cologne

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Was thanked: 2 time(s) in 1 post(s)
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
Jan
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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