# NDI Support

Exaplay 3 can receive **NDI®** (Network Device Interface) video streams as live inputs, and optionally output to NDI for monitoring or routing.

## What Is NDI?

NDI is a royalty-free standard by NewTek/Vizrt for transmitting high-quality video over standard IP networks (Gigabit Ethernet or faster). Common NDI sources include:

* **vMix**, **OBS**, **Wirecast** — live production software
* **PTZ cameras** with NDI output
* **NDI converters** for SDI and HDMI sources
* Other Exaplay 3 instances

## Receiving NDI

1. Ensure the NDI sender is on the same network as the Exaplay machine.
2. In the **File Browser**, click the **Live Feeds** tab.
3. Available NDI sources appear automatically (NDI discovery uses mDNS).
4. Drag an NDI source onto a track in the Timeline, the same as any media file.

![Live Feeds tab with NDI sources](/files/c90lu7ICJ3n16EqG40Ki)

## NDI Performance

| Resolution | Required network bandwidth |
| ---------- | -------------------------- |
| 1080p/30   | \~125 Mbps                 |
| 1080p/60   | \~250 Mbps                 |
| 4K/30      | \~500 Mbps                 |

Use a dedicated VLAN or at least a managed switch with QoS for NDI traffic in professional environments.

## NDI Output (Monitoring)

To send an Exaplay output as an NDI stream:

1. Open **Config → Outputs**.
2. Select the output you want to share.
3. Enable **NDI Output** and enter a stream name.

The stream becomes discoverable by any NDI receiver on the network.

## Troubleshooting

| Problem                     | Solution                                                                 |
| --------------------------- | ------------------------------------------------------------------------ |
| NDI source not discovered   | Check firewall (allow UDP 5353 for mDNS, and TCP/UDP 5960+ for NDI data) |
| Dropped frames              | Use a wired connection; NDI is latency-sensitive                         |
| High CPU on receive         | Install the NewTek NDI SDK for hardware-accelerated decoding             |
| Source shows but won't play | Check that resolution and frame rate are within system limits            |


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