Quick Madmapper NDI tutorial live video over ethernet Mac to PC to Mac

This might be the fastest tutorial I could create.

Notes:


A friend had a Question and I thought it was easiest to answer with a video. How to get NDI in and out of Madmapper.

Troubleshooting before you begin:
1. Turn off your wifi (wifi might work, but it won’t look pretty).
2. Use Gigabit Ethernet (that means, cables, routers, and computers that support it). Yes, you can use 10/100 ethernet and send video across, but you can do a lot more with 1000 than 100.
3. Make sure you are on the same network and with an assigned IP address. NDI communicates “almost” automatically over a network, so if your devices are connected, then they should be able to share video.
4. If your computer is slow, try the “low-bandwidth” settings.

And that’s it, after a few clicks you should have a live video feed traveling across your network.

This video was made “fast” sorry if it’s not super polished.
Free music found at FMA
http://freemusicarchive.org/music/Tours/Enthusiast

NDI tools found here:
https://www.newtek.com/ndi/tools/

If you have issues downloading NDI tools, try a different browser or a private window (Adblockers my stop the pop-up form).

You can find the mapping software at Madmapper.com

Hope this helps. Ask questions and maybe I’ll make a more comprehensive version some day.

The NDI tool suite is pretty extensive and worth looking into for sending video over Ethernet.

I used OBS for the screen recording on windows, sorry for the Infinite desktop.


 

NDI bandwidth requirements:

The table below shows typical NDI network bandwidth requirements that we have measured when using NDI® sources with our ingest or playout applications when using very complex signals.

NDI® Format fps Mbps MB/s
NDI|HX 1920×1080 30 24 3?
NDI 1920×1080 25 105 10-13
NDI 1920×1080 30 120 12-15
NDI 1920×1080 60 200 20-25
NDI 3840×2160 30 280 28-35
NDI 3840×2160 60 480 45-60

It is important to note that these results are different than the bandwidth requirement that Newtek indicates:

NDI® Format fps Mbps MB/s
NDI 1920×1080 30 100 12
NDI 1920×1080 60 125 16
NDI 3840×2160 30 200 25
NDI 3840×2160 60 250 32

This is most probably because data rates can vary depending on the type of video signal.

So how many channels can you have?

Unfortunately the answer is NOT as easy as dividing the capability of your network (1Gb theoretical) by the bandwidth requirements.

Indeed, we have seen that on Mac computers, we were able to do max 4 channels of 1080p30 on a 1Gb connection.

(source) ^

 

 

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