Now that NDI has multicast functionality - has anyone used NDI out (with multicast enabled in NDI Access Manager) of Vmix for display to multiple screens around a venue?

NDI/HX is for hardware devices only. The question is moot.

If you're considering NDI-HX, just encode to an RTMP stream and reflect it off an NGINX instance. Your own local stream to clients on your LAN. Minimal workload for the NGINX server, it could be a raspberry Pi.

You could use a hardware encoder, but that would likely only serve a few client streams.

There will be some latency, but NDI-HX has latency anyway.

I've considered this sort of thing for on-campus digital signage.

NDI over Gigabit LAN would be our ideal. Unfortunately there are no wired ethernet ports in the venues we will be in, or they are on networks that we won't have access to test and configure before we arrive in order to guarantee success. Hence looking for an alternative that is definitely not ideal. Wireless - because we bump in the morning, and bump out that afternoon and need to reduce set up time. Running cable takes time and needs to be taped down / secured for WHS reasons and would be some quite long runs.

At the moment the tentative plan is a point to point or point to multipoint set up from a central distribution pole to 4 displays using something like a https://www.ubnt.com/airmax/liteap-ac/ as the base and https://www.ubnt.com/airmax/nanostation-ac/ or https://www.ubnt.com/airmax/nanobeam-ac-gen2/ as the receivers (probably a 1-2 setup). Or go straight for a 1-1 ptp nanobeam to nanobeam setup. We have some concerns around using something rather overpowered for basketball size court(s) locations, and of course potential interference between each link.

Kane - if you have advice on alternative options I'd be happy to have some leads to chase down.

Hallo,

Video Encoder H.264 RTMP Encoder HDMI Encoder IPTV H264 Mit HLS HTTP RTSP UDP


or

transfer

WLAN-Bridge Nanostation NS-5ACL

Gruss

Decoder HTTP RTSP RTMP UDP HLS Zu HDMI VGA CVBS Empfänger


Drahtlose H.264 HDMI VGA CVBS Decoder HD Video Audio IP Streaming Decoder WiFi HTTP RTSP RTMP UDP HLS Zu HDMI VGA CVBS Empfänger

Why not just use ffmpeg to encode a multicast Transport stream right from your vMix DirectShow output? I do it all of the time.


But you still have possible issues with WiFi and Multicast being enabled on the network you don't control.

Steve

We'd prefer as close to realtime as possible.

We set up our own network - that's actually the purpose of the post. Working out the practical limits of wifi to see what might work.
NDI - only for low latency. But - you're right, if NDI-HX, then multicasting h.264 is likely a better option - what's the lowest latency you've introduced doing this?

Optimized settings 300ms
Safe settings 500/1000ms
With FFMPEG

Elvis,

That's amazingly helpful - thankyou! So - to check I understand:

In the Youtube video - you have camera - video encoder - ethernet - vmix with a delay of ~300ms?
or - was it camera - video encoder - (wireless) - NS-5ACL - vmix with a delay of 300ms?


And in the past you have used:
camera - video encoder (hdmi) - ethernet - NS-5ACL - LBE-5AC-Gen2 with 300-400ms latency?
or - was it camera - video encoder -(wireless) - LBE-5AC-Gen2
over 3Km! nice.

Thanks!

Amazing - thankyou!