Quick wins for a faster PC:
Scan for outdated or missing drivers - takes under a minuteDriver Scan →Clear out junk files and repair common Windows errorsFree Scan →NDI (Network Device Interface) is a way for compatible cameras, computers and other devices to send and receive video, audio and metadata over an IP network. It is a connectivity technology, not a codec: NDI formats use different codecs and make different trade-offs in bandwidth, latency and image quality.
What NDI does
An NDI sender makes a source available on a network; an NDI-enabled receiver can find and use it. A source might be a camera, graphics system, mixer, capture card, media player or software application. NDI describes the connection as bidirectional and capable of carrying multiple streams over a shared network connection.
That does not mean every NDI device or application supports every format, or that any network can carry any number of streams reliably. Check both ends of the workflow and test the network under the resolution, frame rate and stream load you plan to use.
NDI is not a codec
NDI is the interface and transport workflow; the video format determines how the picture is encoded and affects bandwidth, latency and image quality. NDI’s format overview associates SpeedHQ with NDI High Bandwidth and H.264/AVC and H.265/HEVC with NDI HX formats. The official overview does not provide a current, universal bitrate or latency table, so a single bandwidth figure cannot accurately describe every NDI stream. NDI’s technology overview explains the distinction.
Do these 3 things before closing this tab:
1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minute#1 Best Overall
- Compact but Powerful Design: ZowieBox is smaller than a phone, featuring a tally light and LCD screen for streaming status. Capture console gameplay in up to 4K with zero-lag HDMI passthrough, while the built-in video encoder converts video for IP streaming. The IP stream can also be decoded back to a 4K HDMI signal.
- Standalone Game Streaming: Just plug and play—ZowieBox enables PC-free live gaming without affecting gameplay. As an RTMP hardware encoder and HDMI streamer, it delivers stable streaming directly from your source, making it ideal for gaming, live events, and professional broadcasting.
- NDI|HX3 Converter Technology: ZowieBox converts HDMI signals to NDI|HX3/HX2/HX, functioning as an NDI video encoder, or NDI Video Decoder for flexible IP workflows. Certified NDI technology enables low-latency gameplay streaming through OBS/vMix. Note: Encoder and decoder modes cannot run simultaneously; full NDI signals are not supported.
- UVC to HDMI Conversion: Supporting up to 4K@30fps and 1080p@60fps decoding, ZowieBox enables flexible conversion for webcam and video workflows. As a video decoder and HDMI to IP converter, it expands connectivity options for professional video devices. Note: USB capture card functionality is not currently supported.
- All-around Configuration Options: Control ZowieBox through its web UI on a PC, phone, or tablet. Manage connected PTZ cameras, tally light, video/audio, OSD, work mode, streams, network, and system settings. Support for VISCA over IP encoder workflows enables flexible PTZ control, while the dashboard provides video preview and system status.
NDI High Bandwidth and NDI HX
High Bandwidth and HX are NDI format families with different trade-offs, not separate connectivity standards. In general, the appropriate choice depends on the source and receiver support, the available network, and the importance of image quality and latency in the specific workflow.
NDI High Bandwidth
NDI associates SpeedHQ with its High Bandwidth format. Confirm that the sending and receiving devices support the required format and that the network can handle the intended workload; do not assume that a format label alone guarantees a particular bitrate or performance.
Rank #2
- SDI NDI Encoder Decoder: Encode SDI signals to NDI or decode NDI signals to SDI. It supports NDI|HX3, NDI|HX2, and NDI|HX (Certified), but not full NDI (NDI|HB). Streamlines workflows with high-efficiency NDI|HX formats, ensuring seamless integration between different production systems. Note: ZowieBox cannot be used as an encoder and decoder at the same time. It can only switch between the two working modes, not use both modes at the same time
- AVoIP to NDI and SDI: It can decode AVoIP video streams (RTMP, RTSP, SRT) into NDI and SDI in decoding mode, seamlessly integrating diverse video sources into NDI-compatible workflows for enhanced efficiency in media production and broadcasting
- UVC to SDI Converter: Easily turn your UVC cameras into SDI cameras. With up to 1080@60fps decoding resolution, ZowieBox allows you to unfold more possibilities for webcam devices. Note: USB capture card functionality is not supported
- SDI Extender: Using two ZowieBoxes enables point-to-point transmission: one serves as an SDI encoder/transmitter, while the other functions as an SDI decoder/receiver. This setup allows SDI video signals to be transmitted via a LAN. Note: The SDI signal of ZowieBox (hardware before 10.1.13) is not compatible with ATOMAS SHOGUN INFERNO, SHOGUN ULTRA, Blackmagic Decklink Quad 2
- Standalone Live Streaming: Just plug and play, ZowieBox can stream videos PC-free, not affecting your computer performance at all. Support SRT caller/RTMP(S)/RTSP streaming protocol
NDI HX
NDI’s 2023 NDI 5.6 white paper describes HX as providing similar video quality at a lower bit rate, making it potentially suitable for constrained links such as Wi-Fi or WAN connections. It also identifies PTZ cameras and mobile phones as common HX hardware examples. This is background on the format, not confirmation of support in a specific model: check the device maker’s specifications. NDI 5.6 White Paper (2023).
What you need to use NDI
- An NDI-capable sender, such as a supported camera or software source.
- A compatible receiver or receiving application.
- A network that connects the devices and has enough capacity for the chosen formats and stream load.
- NDI Tools if you need its workflow utilities. NDI describes the suite as a free collection of software applications. Its tools documentation directs users to contact sales for commercial-purpose use; check the applicable terms rather than treating that notice as a complete licensing ruling. NDI Tools.
Download Tools from NDI’s official site. The installation guide warns that third-party download sites may not provide the latest release. Installing NDI Tools.
Rank #3
- 【Real-Time IP Workflow】1920×1080@60fps NDI encoder, enabling frame-accurate synchronization for live streaming teams, sports events, game streaming, and multi-camera production. The NDI encoder converts HDMI signals into full NDI video streams with latency below 65 milliseconds, ensuring seamless synchronization of video motion and fast-paced actions. Compatible with vMix/OBS/Wirecast integration.
- 【Flexible IP to Display】A bidirectional all-in-one device that functions as both an NDI encoder and NDI decoder. When used as an decoder, it converts NDI streams into 1080p60 HDMI signals. Decode NDI signals from the production console to HDMI large screens for real-time multi-camera monitoring, project vMix NDI video streams onto meeting room displays, or route live signals to broadcast monitors. Eliminate complex cabling—a single Ethernet cable can simultaneously transmit power and signals. (Select encoder or decoder mode via the NDI backend network interface).
- 【IP-Based Wiring Infrastructure】Using an HDMI-to-NDI converter, a single network cable can replace long-distance HDMI cabling (up to 100 meters), enabling both power supply (PoE+) and network transmission over a single cable, significantly simplifying on-site cabling. Also supports PoE+ or Type-C interface 5V power supply, reducing cabling costs. It is an ideal solution for educational live streaming and recording classrooms, as well as enterprise IT management IP-based production.
- 【Real-Time Status Monitoring】The HDMI decoder is equipped with a Tally indicator light and an LCD screen that displays real-time information, including IP address, network status, encoding/decoding status, video resolution, audio input/output status, and indicator light status. Without the need for a computer, you can monitor the latest program updates in real-time during live events.
- 【Real-Time Monitoring via Uncompressed HDMI Signal Loop-Out】The NDI live streaming encoder supports HDMI loop-out functionality, enabling near-zero latency signal pass-through. This allows for real-time video signal monitoring without interrupting NDI encoder processing and transmission. This provides a simpler setup solution for video production or live streaming.
Set up a basic NDI workflow
- Check format support. Identify the NDI format your sender provides and confirm the receiver or software can accept it. Verify resolution and frame-rate support on both ends.
- Connect both devices to the network. Start with a wired connection where practical, particularly when reliability matters or several sources are involved. Confirm that the devices can reach one another.
- Install the relevant software. If your workflow needs NDI Tools, obtain it from NDI’s official Tools page and follow the installation guide for your system.
- Open the receiver and select the source. The exact menu depends on the application. If the source does not appear, use the discovery and network checks below rather than assuming the sender is offline.
- Test with the real workload. Check picture, audio, delay and stability at the intended resolution, frame rate and number of simultaneous streams. NDI’s network guidance recommends testing because results depend on the environment and settings.
Using NDI with OBS
NDI’s OBS page identifies the NDI plugin for OBS as unofficial and points users to a setup guide. It is not an official NDI plugin, and compatibility with every current OBS version is not established. Check the plugin’s setup instructions and compatibility information for the OBS version you run before relying on it for a production workflow. NDI for OBS.
Plan the network before adding sources
NDI’s network-interface guidance recommends setting the adapter to 1 Gbps Full Duplex or higher, if supported, to make maximum available throughput possible. This is adapter configuration guidance, not a guaranteed per-stream bandwidth requirement or a promise that every gigabit network can carry every NDI workload. Actual needs vary with format, resolution, frame rate, number of streams and network implementation. NDI Network Interface Settings.
Rank #4
- 4K HDMI Encoding with Loop-Through Output – Encode HDMI video up to 4096×2160p30 while using the HDMI loop-through for local monitoring or pass-through to displays and switchers.
- Multi-Protocol & Multi-Destination Streaming – Stream simultaneously via RTMP, RTMPS, SRT, NDI|HX, HLS, and TS over UDP/RTP, supporting modern broadcast and IP workflows.
- Advanced Video Processing & Overlays – Includes de-interlacing, scaling, cropping, aspect ratio conversion, and support for text, image, and clock overlays for branded output.
- Simultaneous Streaming & Recording – Record video directly to internal storage (128 GB), external USB storage, or network locations while streaming live, with support for scheduled and loop recording.
- Flexible Network & Connectivity Options – Equipped with Gigabit Ethernet with PoE and Wi-Fi 802.11 a/b/g/n/ac, plus support for 4G/5G USB modems (not supplied) for fixed or mobile deployments.
Network adapters are commonly set to auto-negotiation. NDI cautions that changing adapter properties can improve or worsen reliability and recommends using a network analyzer to test before and after changes. A gigabit Ethernet switch and cabling may suit a wired, multi-device setup, but choose equipment only after sizing the installation; NDI’s guidance does not prescribe a particular switch, port count or cable specification.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Why an NDI source may not appear
- The devices are not reachable. Confirm that the sender and receiver are connected to networks that can communicate. Check routing, VLANs and firewall rules with the network administrator where applicable.
- The receiver does not support the sender’s format. Check format and resolution support in the sender, receiver and software documentation.
- Discovery is restricted. NDI discovery commonly relies on network discovery mechanisms that may not pass between subnets or across multicast-restricted segments. NDI Discovery Service can act as a centralized registry and may help in those environments; its exact configuration depends on the network.
- The issue is not necessarily discovery alone. Discovery tools can help diagnose registered senders, receivers, addresses and server connection settings, but they do not automatically fix firewall, VLAN, routing or compatibility problems.
NDI documents both NDI Discovery and Discovery Service. Consider the service when multicast discovery is restricted or a workflow spans network segments; follow the configuration guidance for your environment.
Best Value
- HDMI to SRT/RTMP(S)/RTSP Encoder:Convert HDMI video sources into SRT, RTMP, or RTSP streams for real-time online broadcasting and remote production. Stream directly from cameras, gaming consoles, or other HDMI devices to platforms such as YouTube, Twitch, Facebook Live, or private streaming servers. Ideal for live events, conferences, sports, education, and professional AV applications, delivering stable, high-quality video with low latency.
- SRT/RTMP(S)/RTSP to HDMI Decoder: Decode SRT, RTMP(S), and RTSP network streams and output them through HDMI to TVs, monitors, switchers, and other video equipment. Easily bring remote cameras, drones, action cameras, or surveillance streams to local HDMI displays for real-time monitoring and playback. Ideal for sports events, press conferences, live production, and multi-display applications, providing stable HD video output and seamless integration with devices such as ATEM switchers.
- HDMI to UVC Encoder: Use an HDMI to UVC converter to connect a professional HDMI camera to your computer for high-quality video calls in meetings. It also allows you to link HDMI devices (e.g., cameras or classroom equipment) to teaching computers or projectors for better interactivity. Enables HDMI cameras or sources to connect to computers or streaming devices for high-quality live broadcasts
- UVC to HDMI Decoder: Convert UVC cameras (e.g., USB webcams, action cameras) to HDMI signals for easy connection to conference equipment or large displays or ATEM switcher, enhancing video quality and participation. In education and training, convert UVC signals to HDMI for display on large screens
- SRT/HDMI Encoder & Decoder:SRT (Secure Reliable Transport) provides secure, low-latency video transmission with enhanced stability over challenging network conditions. ZowieBox enables bidirectional conversion between HDMI and SRT streams, allowing reliable remote production, live streaming, and video contribution workflows with high-quality transmission even across long-distance networks.
Licensing and device checks
NDI says its standard SDK is royalty-free subject to its terms. Developers distributing applications must follow the applicable attribution and implementation requirements. NDI also notes that AAC, H.264 and H.265 formats may require separate licensing, which is the developer’s responsibility. The NDI Advanced SDK has separate commercial-use instructions, so do not assume standard SDK terms apply to it. NDI SDK licensing.
NDI’s FAQ says it stopped selling NDI-HX upgrade licenses on December 31, 2025. That policy does not establish whether an individual camera already supports HX or whether its manufacturer offers another upgrade path. Check the exact model with its manufacturer. NDI FAQ.
Or let it run in the cloud
NDI is for moving supported sources across a network; it does not itself keep a pre-recorded YouTube stream running around the clock. For that separate job, StreamNeo is a cloud service that loops uploaded videos or playlists on a YouTube channel: upload a recording, add your YouTube stream key, and go live. Nothing has to stay on at home; uploaded quality streams as made, up to 4K 60fps, at one price per slot. StreamNeo can automatically recover if YouTube drops the stream. The first day is free with no card, and the monthly option is $9.99 per month. Start a free day with StreamNeo.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
