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VMIX "Analog to Digital" Converter/StageBox - converting 24ch SDI and 32ch Audio into NDI
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zenvideo  
#1 Posted : Sunday, March 31, 2019 4:43:22 AM(UTC)
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Originally Posted by: jacklavey Go to Quoted Post
... or does the ndi processing still take a good chunk of GPU power where I need to stick with a 16x GPU like GTX 1070 or higher?

To the best of my knowledge, as someone who uses the NewTek NDI SDK, all NDI encoding/decoding that uses Processing.NDI.Lib.dll (as found in the NDI folder in vMix) is performed by the CPU, not the GPU. vMix may be using the GPU for other purposes in your scenario, but I think the limits on NDI encoding will come from your CPU.

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thanks 1 user thanked zenvideo for this useful post.
jacklavey on 3/31/2019(UTC)

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jacklavey  
#2 Posted : Sunday, March 31, 2019 4:52:31 AM(UTC)
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nice, that is kind of what I thought, but yes I too am suspecting VMIX may need the GPU for other things.

it might just require some testing on my part. I might go ahead and get the 1050ti card, and then pull out a 1070 and 2080 from my other machines to compare.

Thanks for the response zenvideo
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mjgraves  
#3 Posted : Friday, April 12, 2019 12:37:00 AM(UTC)
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Note really A > D, but definitely SDI > IP.

24 SDI channels, presuming 1080p60, is going to each a lot of bandwidth. You'll need 5 gbps Ethernet.

I'm curious to know how you get that much SDI I/O into one chassis? Three 8-port cards? What mobo supports that?
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jacklavey  
#4 Posted : Friday, April 12, 2019 2:27:02 PM(UTC)
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yes thank you lol, SDI/analog audio - IP, not analog to digital.

We are running this on a 10gb network with a 10gb pcie card to a 10gb router. My other vmix machines are connected to 1 gb ports on the switch not pulling more than 8 full res NDI sources at a time as to not overload the network.

Yes I'm using 3 8 channel pcie cards (decklink quad 2)

EVGA x299 Dark has 5 16x slots + 1 4x slot

ASUS x299 Sage Mobo has 7 16x slots


I'm also converting 32 channels of audio to NDI as well over a big audio interface (thus the analog audio part) Currently only using 16 but planning on going up to 32 eventually so the testing is for 32.
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