I have had similar problems and mentioned them to CraigS a few weeks ago. I have Wirecast 8.2 Win 10 and Two NDI sources from external pcs (sometimes I run multiple NDI from each computer - Skype and Desktop). Usually 1 NDI source is picked up easily but it takes a lot of restarting etc to get the two sources working. I also have intermittent problems with picking up the Audio from the second source. Occasionally NDI monitor on the Wirecast machine isn't picking up the NDI but stopping and restarting NDI scan on the external PC quickly sorts out that problem. But having two (or more) NDI sources visible on the Wirecast Computer via NDI Monitor is no guarantee that Wirecast will pick up the two sources - It will usually pick up one source and as I said a lot of new shots, restarts etc are required to get it going. That said I usually do get it to work eventually.

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My system operates on a dedicated Gigabit LAN. Hope this adds to the pool of knowledge. Are all your NDI (source) tools up to date? While I believe we sorted out backward compatibility I want to make sure that's not part of the issue. Each of you describe your NDI Sources to Wirecast setup in detail to see if we can duplicate the issue. Include all NDI tools used and their versions. Ideally a Gigabit LAN should be able to handle 16 1080p60 sources but keep in mind larger sources (computer screens for example) may take up more bandwidth.

Of course even two large sources shouldn't be an issue in and of itself. Basil McCrea or Matthew Potter or CraigS from a resource standpoint (CPU or GPU) as it pertains to the Wirecast host computer, do you think it would be better to offload a Skype (or Zoom) session to a second computer and bring it in via NDI, or would it be less taxing on the host computer to run both Wirecast and the Zoom session simultaneously.

Specs: i7 6500, 16GB Ram, NVidia 750-ti graphics card, Wirecast 8.2 streaming to Facebook and recording a stream, offloading the stream encoding and recording to the graphics card. Mike G I will always, ALWAYS be under the opinion that offloading any extraneous processing to other machines for a better experience. Not only will that second machine be able to have finer audio controls but if you’re needing to have different visual inputs it would be an absolute saviour for as well. It could actually use the input from the NDI output of Wirecast on that other computer so long as it‘s setup for receiving NDI inputs. Audio could be controlled separately and fed in through NDI or the audio out of the machine, the only downside I see to the offloading the Skype to another machine on the network is the network speed you’re essentially doubling it and truly requiring the hard-line ethernet in this case (You should be ethernet anyway but fringe cases be it as they may). That being said however, the most optimal variant of the skype conversation is another machine brought through as a true digital capture solution through another machine.

NDI is a great new technology that can allow for inputs without needing other capture cards however I have noticed issues with audio and video lag in my rudimentary testing to date. It still needs to grow.

It will eventually be a great technology but at the moment, I would NOT trust it for a live production environment conference call yet. Not until NewTek resolves the fact that they are trying to create an industry standard yet charging $50 for a mobile application that is still broken, or conversion tools that require “Upgrades” to even select audio inputs.