What is NDI and why does it matter for live events

Short answer: NDI sends video and audio over an ordinary IP network instead of dedicated video cable. For live events that means fewer cable runs, faster changes and more sources, provided the network is designed for it.

What NDI actually does

NDI, short for Network Device Interface, turns each camera, laptop or graphics machine into a source that any other device on the network can see and pull. Routing becomes a software choice instead of a patch bay.

What it unlocks on a show

• One Ethernet backbone instead of an SDI run for every source
• Remote presenters and overflow rooms without extra hardware
• Confidence monitors and record feeds added in minutes
• Last-minute source changes without pulling new cable

Where it falls short

NDI compresses video, so it is not the right path for the most critical, lowest-latency feed in the room. We keep the main program path on SDI or a dedicated AV-over-IP system, and use NDI for everything around it.

What the network needs

• Gigabit switching at minimum, with headroom per stream
• A dedicated VLAN, isolated from guest and house traffic
• Managed switches with multicast handled properly
• Wired connections; WiFi is for monitoring only

The bottom line

NDI is a flexibility tool, not a replacement for a redundant main path. Designed well, it removes cable and adds options. Dropped onto a venue's shared network, it drops frames at the worst moment.