Live Production Software Forums

Welcome Guest! To enable all features please Login or Register.



Go to last post Go to first unread
#1 Posted : Sunday, July 19, 2020 7:29:51 AM(UTC)

Rank: Newbie

Groups: Registered
Joined: 5/9/2020(UTC)
Posts: 6
Location: Cologne

Hi all,
today I have prepared a show we are running in august several times. Potential problem: I am maxing out the network on the VMix computer and am thinking on how to reduce the traffic a bit. I could use some suggestions.
I´ll explain what ndi-streams are going on in the setup:
On the input side I have 4 computers with two screens each plus two single screen-computer. All 10 screens are going into vmix by vmix desktop capture, they are 1080p. From VMix I am using all 4 outputs. Output 3 and 4 are going to 5 computers each. All four outputs are going back to VMix inputs, so that I can do a kind of submixing. Then I have two webpages as inputs, but they do not cause much traffic. So if I summarize, I have 14 NDI input streams and 14 output streams in 1080p.

Two ideas are in my head:
Is there any other way to get the vmix outputs back in vmix apart from ndi (and sdi out/in, I would need an 8-port card, only have a 4 port)?
And the other idea is: Could I use multicast to split the outputs going to multiple computers in the switch rather than sending them unicast to every computer? How would I do that?

Oh, I discovered a topic "Has anyone got a working ndi setup yet" : Although ressource monitor shows 100% network load and the ndi streams are a bit choppy when there is motion on all sources, it works.
Pretty astonishing.
#2 Posted : Sunday, July 19, 2020 9:06:29 AM(UTC)

Rank: Advanced Member

Groups: Registered
Joined: 3/20/2014(UTC)
Posts: 2,418
Location: Bordeaux, France

Thanks: 198 times
Was thanked: 686 time(s) in 527 post(s)
Check Zen Computer NDI Router


Buy a 10 Gbits NIC
#3 Posted : Sunday, July 19, 2020 10:21:31 PM(UTC)

Rank: Member

Groups: Registered
Joined: 2/23/2019(UTC)
Posts: 24
United Kingdom

Thanks: 4 times
Was thanked: 4 time(s) in 3 post(s)
If you are doing full screen capture I'd try out using NDI Scan Converter to see if it's output is any different than vMix desktop capture. I don't know if it will be any different but there is a chance one option might be more efficient for desktop capture. In either case, reduce the frame rate to match your project if you are doing under 60P

Zen Computers' NDI Rtx might help if you want to use another machine to take on the load of splitting the NDI outputs to multiple machines.

vMix input of it's own NDI output shouldn't hit your network card.

In the hamburger menu at the bottom right of vMix you can run vMix NDI Config and enable UDP - I'm not sure if the is Multicast UDP but would be worth a try. If you have NDI tools installed then Access Manager also has multicast options.

The easy option is add a 10gig network card - or, if you stay on TCP, even a second gigabit card to the network should help now NDI can use multiple paths.

#4 Posted : Monday, July 20, 2020 9:05:18 AM(UTC)

Rank: Advanced Member

Groups: Registered
Joined: 7/1/2015(UTC)
Posts: 1,033
United States
Location: Houston TX

Thanks: 293 times
Was thanked: 238 time(s) in 210 post(s)
Add a NIC to your vMix host and run a second Ethernet cable to the switch. NDI automatically link aggregates. If you had saturated your lone NIC the problem will be solved.
Users browsing this topic
Forum Jump  
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.