
NDI originated from the Network Device Interface efforts developed by NewTek, and became a separate entity when NewTek was acquired by the Vizrt Group in 2019. During the global pandemic, NDI adoption exploded as users explored remote production capabilities and discovered that NDI allowed them to securely share NDI sources - particularly PTZ cameras - between remote sites anywhere in the world.
NDI is royalty-free and allows any network-connected product to communicate with each other over IP to transmit, encode, and receive multiple streams that are high quality, low latency, and frame-accurate. Because NDI is freely available, developers can easily integrate the protocol into their devices, applications, or existing systems. Specifically for audio, NDI Audio Direct provides a set of audio plugins that allow virtually any audio software application to take advantage of NDI, integrating NDI audio into software-based audio workflows.
Introduced in 2021, NDI 5 brought native support for macOS, iOS, tvOS, and iPadOS devices, as well as support for ARM-based devices, enabling billions of devices to use NDI. Users can now specify which network interface will be used by NDI, reducing potential conflicts with other protocols or applications, and NDI 5 made it easier to set up private NDI networks, ensuring streams or inputs are only accessible to authorized users.
"Joining the OCA Alliance marks a significant leap forward in the standardization strategy for metadata in NDI. It is also a tremendous pleasure to collaborate with such brilliant minds as the creators of AES70," says NDI Technical Director, Roberto Musso. "I look forward to the opportunity to publish the guidelines for AES70 over NDI soon."

Coinciding with this announcement, NDI has launched a major update to its metadata capabilities, introducing new standards for SCTE, MIDI, DMX, and captioning, and unveiling the NDI Metadata Lab. This latest release expands the possibilities of metadata integration in live production and broadcast workflows, enabling smarter automation, remote control, and seamless interoperability.
Besides documenting some already known capabilities with the support of Vizrt, the new release also introduces four new official standard metadata elements, developed in collaboration with some of the most innovative brands in the NDI Ecosystem: support for broadcast standards CEA-708 & SCTE-104, with ToolsOnAir, the audio standard MIDI with LAMA, and the lighting control standard DMX, in partnership with SalrayWorks.

The success of these partnerships inspired the creation of a new initiative, the Metadata Lab. Any brands and developers can now submit their metadata proposal at ndi.video/metadata-lab. The NDI technical team will then review proposals and work together with creators to test and improve upon the submission. When ready, NDI will publish it as an official NDI Metadata standard in the ever-growing documentation.
www.ocaalliance.com
www.ndi.video
