How to Choose an NDI Video Switcher

An NDI switcher lets you cut between cameras, computers and other video sources sent over a local network instead of individual video cables. A good choice depends less on headline specifications than on how well the switcher fits your sources, your network and the output you need. This guide walks through the decisions in order, so you can compare options against your own requirements rather than a generic feature list.

Start with the intended use

Begin with the job, not the product. A livestreamed talk, a hybrid meeting room, a classroom, a worship service and a multi-camera studio all place different demands on a switcher. Write down where the sources are, how they reach the network, who operates the switcher and what the final output must be: a live stream, a recording, a feed into a video call, a screen in the room or several of these at once.

• How many sources do you need to switch between today, and how many might you add later?
• Which sources already send NDI, and which are plain HDMI, SDI or USB devices that need a capture source or converter?
• What is the final destination: streaming platform, video call app, local recording, projector or another NDI receiver?
• What resolution and frame rate does that destination expect?
• Will one person operate everything, or do you need remote control, presets or a separate audio operator?
• Is the network shared with office or guest traffic, or dedicated to video?

The answers also point to the form factor. A software switcher runs on a computer you supply, so its limits depend on that machine. A hardware switcher has dedicated controls and fixed inputs and outputs, which can be simpler for volunteers or fast-paced events. Some setups combine both, with a hardware control surface driving software. Decide which model suits your operators before comparing individual products.

Features that matter

NDI support comes in different forms. Full-bandwidth NDI uses light compression and a relatively high bitrate per source, which keeps decoding simple but uses more network capacity. NDI HX variants use stronger encoding, such as H.264 or H.265, to lower the bitrate, which shifts more work to decoding. Check which variants a switcher can receive and send, because a camera that only outputs HX is of little use with a switcher that cannot decode it.

Inputs and outputs. Look at how many NDI sources the switcher can handle at the same time, not just how many it can list. Note any physical inputs for local cameras or computers, and the outputs it provides: NDI program output, HDMI or SDI out, built-in streaming, recording and virtual camera output for video call software.

Resolution and frame rate. Confirm that the switcher supports the resolution and frame rate you plan to use for program output. If your sources run at different frame rates, find out how the switcher handles conversion, since mismatched rates can cause judder or dropped frames. Choose a single target format for the project and check every source against it.

Encoding, streaming and recording. If you intend to stream directly from the switcher, check which streaming protocols and encoding settings it offers and whether you can set the bitrate yourself. For recording, check the recording format, the codec, where files are stored and whether it can record individual inputs separately in addition to the program mix, which is useful for editing afterwards.

Audio. NDI can carry audio alongside video, but switchers differ in how they handle it. Check whether you can mix audio from several sources, add a microphone directly, adjust levels per input and delay audio to keep it in sync with video. If audio is handled by a separate mixer, confirm how that mixer's output gets into the switcher.

Control and monitoring. A multiview display showing all sources at once makes live switching far easier. If you use PTZ cameras, check whether the switcher can control them and recall presets. Tally, which tells camera operators or presenters when they are live, may be supported over NDI or require a separate system. Also consider graphics, lower thirds, transitions and replay only if your production actually needs them.

Treat every specification as a capability to verify in your setup, not as a measure of quality. A maximum input count or supported format describes what a device is designed to accept; actual performance depends on the network, the source devices and, for software, the computer running it.

Check compatibility

Network. NDI depends on the local network, so check it before the switcher. Wired Ethernet is generally more predictable than Wi-Fi for live video. Make sure your network switch and cabling can carry the combined bitrate of all sources you plan to use at once, plus any other traffic on the same network. NDI sources are normally discovered automatically on the same subnet; if sources sit on different subnets or VLANs, you may need an NDI discovery server or network changes, so involve whoever manages the network early.

NDI versions. Sources, switchers and receivers do not always support the same NDI versions or variants. Check the supported versions listed for both the switcher and each source device, and whether any feature, such as HX decoding, depends on a particular version, firmware update or license.

Operating system and apps. For software switchers, confirm support for your operating system and check the vendor's stated hardware requirements, especially for processor and graphics, since decoding many sources is demanding. Find out whether NDI support is built in or added through a plugin or separate tools. If the output must feed a video call app, confirm the switcher offers a virtual camera or another method that app can use as a capture source.

Connectors and power. Count the Ethernet ports and physical video ports you need. If your cameras use Power over Ethernet, check that your network switch supplies enough power for all of them. For hardware switchers, check the power supply, the available outputs to monitors and whether the unit fits where it will be installed.

Privacy and file handling. NDI sources on a network can usually be seen by other devices on that network, so check who has access and whether the switcher or your network offers ways to restrict it. If a product includes cloud features, remote access or online streaming accounts, read the vendor's documentation on what data leaves your network and where recordings are stored. Verify these points rather than assuming any default behavior.

Build a shortlist

Turn your notes into a requirements checklist and compare each candidate against it. Mark each item as required, preferred or not needed, and drop any product that misses a required item.

• Supports the NDI variants your sources actually send, including HX if needed
• Handles your required number of simultaneous sources, with room for growth
• Outputs your target resolution and frame rate
• Provides the outputs you need: NDI, HDMI or SDI, streaming, recording or virtual camera
• Offers the recording format and codec your editing workflow accepts
• Includes the audio mixing, microphone input and sync adjustment you need
• Supports multiview, tally and PTZ control if your production uses them
• Runs on your operating system and hardware, or fits your rack, desk and power setup
• Works with your network layout, including subnets and available bandwidth
• Has documented answers on network access, cloud features and file storage
• Can be operated by the people who will actually run it

Before committing, test the remaining options with your own sources on your own network wherever possible. Many software switchers offer a trial, and some hardware resellers allow evaluation or returns; check the terms first. Run a rehearsal that matches a real session in length and number of sources, watch for dropped frames, audio drift and control problems, and keep the option that meets every required item with the least workaround.