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paco3346  
#1 Posted : Sunday, January 30, 2022 1:18:17 AM(UTC)
paco3346

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I've found previous posts discussing how input latency is slightly different between AJA, Magewell, and BMD but how are things looking in 2022?

I'm putting together a system for IMAG right now and recent testing resulted in a 27ms (< 2 frames at 60fps) latency end-to-end (camera to LED wall).

Camera -> Hardware Switcher -> Decklink SDI 4K -> vMix -> HDMI to LED Processor

For the final build we're wanting to go with a DeckLink 4K Extreme 12G. Should I expect the same input latency as the Decklink SDI 4K?
Is it even worth testing an AJA card if I'm already getting such great performance?
JDroadie  
#2 Posted : Friday, February 4, 2022 6:35:58 AM(UTC)
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smokin good time, are you sure? Is the camera genlocked to the switcher?
paco3346  
#3 Posted : Friday, February 4, 2022 7:35:36 AM(UTC)
paco3346

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So I actually checked my notes again and it's 47ms total. (I must have mis-remembered the number.)

We're in the process of replacing a system from ~2015 that is Pandora's Box 6 and has the exact same latency (down to the ms).
With the new system we're going genlock across the board (right now it's all framesync in our hub & switcher). We're even using a Quardo Sync II card to genlock the GPU to the house.

I'll report back with numbers once we have the whole thing installed but it may be 2-3 months.
JDroadie  
#4 Posted : Friday, February 4, 2022 8:50:27 AM(UTC)
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even 47 is good
MattiaCC  
#5 Posted : Thursday, March 31, 2022 6:09:39 AM(UTC)
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Originally Posted by: paco3346 Go to Quoted Post
I've found previous posts discussing how input latency is slightly different between AJA, Magewell, and BMD but how are things looking in 2022?

I'm putting together a system for IMAG right now and recent testing resulted in a 27ms (< 2 frames at 60fps) latency end-to-end (camera to LED wall).

Camera -> Hardware Switcher -> Decklink SDI 4K -> vMix -> HDMI to LED Processor

For the final build we're wanting to go with a DeckLink 4K Extreme 12G. Should I expect the same input latency as the Decklink SDI 4K?
Is it even worth testing an AJA card if I'm already getting such great performance?


Hi, I'm interesting for the same issue, can I ask more spec about hardware you used in the chain? In particular, you use any scaler between vmix and sending card? 47ms is really good in my opinion, about 2-3 frame at 60p... Camera, switcher, capture card and low latency sending/receiving card normally count more than 2 frame

thanks
paco3346  
#6 Posted : Friday, May 6, 2022 2:36:20 AM(UTC)
paco3346

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A quick update on this:

We found that our original testing was flawed (in more than 1 way) and the actual latency on the system we were replacing was 9 frames at 59.94.

That chain was Hitachi HD6000 -> BMD Video Hub 40x40 -> ROSS Carbonite -> SDI Input card (don't know what brand/model) -> Win 7 Pandora's Box 5 -> GTX 980 -> Nova MCTRL660

We just got the new system installed and tested last week and the latency is now.... 9 frames. So no improvement but it's not any worse.

Chain is Hitachi HD6000 -> BMD Video Hub 40x40 -> ROSS Carbonite -> DeckLink 8K pro -> Win10 vMix 25 -> RTXA6000 -> MCTRL660
ChauRichardson  
#7 Posted : Sunday, June 26, 2022 12:28:50 AM(UTC)
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Hi, I want to know how input latency is slightly different between AJA, Magewell, and BMD. Can you please share the link of that discussion with us? I will be thankful to you. I have tried to find it over here but can't find it. I am waiting for your reply and till then I will visit https://edubirdie.org/edubirdie-review-the-most-honest-and-reliable/ here to read the most honest and reliable Edubirdie reviews because I want to hire their essay writers but before that I want to make sure they are trustworthy.
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