Check ZenVideo NDI Router here : http://www.zenvideo.co.uk/ndi.htm

It's an NDI software Matrix Router/Switcher, with configurations up to 20-in, 24-out, which can obviously be used with vMix and all your NDI sources.

Demo video :

You should be able to access your vMix Inputs that are cameras, calls or audio and assign them to various I/O.

I have two vMix computers connected. I have the ZenVideo NDI as an 16 X 16 router. The mic Input on vMix computer #1 is assigned to A2 on the ZenVideo router, going to Output Bus A. On the vMix #2 computer, I can add it as NDI (RouterOut-A).

If the ZenVideo NDI won't work for you, perhaps a vMix + OBS solution will.

You mentioned: "I need full screen processed cam + cam + powerpoint"

Only "full screen cam processed cam" requires vMix as a source (and you have 4 available outputs).
Cams can be used as NDI sources from any computer on your network, just turn the option on in vMix settings.
Powerpoints are likely to be converted to NDI on another computer.

I truly believe ZenVideo NDI Router will do the job for you (when you'll figure out how to re-think your workflow).

Basically you just need to switch these NDI feeds. That's what a router does.

Alternative solutions include:
- setting your EXT 2, 3 and 4 to use Mix Inputs 2, 3 and 4 (to get sub-switching capability)
- use vMixUTC or Panel Builder to control dynamically your EXT 2, 3 and 4.
Here's an example video I did several years to demonstrate this:

NDI is heavy on the network. I have made a video that covers the bandwidth consumption. This does not directly answer your question but you might want to rethink your approach.

Glad to hear. Just wanted to make sure you pay attention, which you obviously did.

I'm using the newest version of ndi tools, 4.6, I can use NDI Screen Capture HX and de newest version of the Zen router/switcher, v1.3.4.25. Why do you ask?

I've the feeling I miss something, that I do not fully comprehend how the router/switcher can help me.

The bottom line is that I want to create 7 outputs, one as the master zoom output, and 6 for the speakers: 3 speakers with 2 views each for the breakout rooms. The breakout rooms all run in parallel and the speakers must be able to switch their views at will. With all this parallellism, I can't control the video streams in breakout rooms anymore, so I want have those 6 channels available simultanously and to enable the speakers to switch between those themselves.

What I see as an alternative is to decentralize the production and set up each speaker PC with a fairly full-fledged installation of vMix HD and do much of configuration locally on the speakers PC. That would limit the number of output channels, at the cost of extra vMix licenses and a configuration that is much more difficult to maintain (e.g. many of the views I need to build and maintain both centrally and locally) and more prone to speakers errors. It's doable, but just a few extra NDI outputs would make life a lot easier. In OBS, that part is a piece of cake.


Still my question, do I miss something of the power of the router/switcher in this story?

Thanks for the explanation. Your setup is more advanced than mine and I do see the value of the router here.

you could run your sources through casparcg and process there. Caspars In- and Outputs are only limited by network and your computer specs.

Thanks for the point to caspercg. I wasn't aware of it. I looked at and, yes, it might work. Bit frankly, I came from OBS and money on vMix because I got tired of all the tricks, loops and additional tools. Looking at the caspercg, it seems even more complex (though possible very powerful). Then I'd rather go back to OBS that has no hard limits for NDI outputs. As said above, I also found another, quite elegant solution in vMix.

Still, I do not really understand why vMix has only 4 NDI outputs.....

Indeed, to me that is implied in the question.



Of course, this would be a heavy load on the system in terms of CPU, GPU and bandwidth, probably too much for a midsegment system. But my Ryzen 9 3900X/ Geforce RTX 2060 holds up easily with 4 NDI outputs and I did some tests with OBS running 8 outputs.