NewTek NDI video streaming over local network
NDI NewTek local network video streaming
Network Device Interface (NDI) is a high-performance standard that allows
anyone to use real time, ultra-low latency video on existing IP video networks.
NDI does not use traditional protocols such as TCIP or UDP it has its own
protocol which can allow real-time video streaming in up to 4K over your local
network. This has many advantages for many industries such as live
broadcasting, Graphic designers, software programmers & even in-house
To Simplify how NDI works
Normally sending video and audio over a local network is usually slow and
jittery even using UDP. Video would normally not be sent over TCIP as TCIP
recovers lost packet’s (which is not needed) UDP does faster transmission as it
does not recover lost packets. To send high quality video over a local network
just is not that efficient at present using TCIP or UDP. NewTek created a new
protocol that sends video and audio over the local network smooth and fast
including 4K video. Though it does require a computer with a high specification
especially for 4k video. A very good CPU & GPU is required. In most
professions requiring such high quality will already be using high spec
computers or at least should be.
So where is the advantage?
The advantage for video production and other companies is, now they can send
video and or audio signals from many compatible hardware devices & many
software applications like Skype. Hardware devices and cameras including
PTZ cameras. NewTek themselves have such cameras along with other manufactures.
This of course is ideal in video production & live tv if the control room
is located on a different floor though it is usually located near the studio. However,
in live broadcasting other members of the team are located on other floors who
are responsible for having video footage ready to go, weather charts & specific
graphics. This means they can send even in a paused or static state over the
local network, ready for the control room to receive on any computer using receiving
software such as Finncast Studio.
Skype are now sending the callers video & audio over NDI. Microsoft have integrated NewTek NDI into Skype which can be turned on and off. The procedure is simple to use and works very well but to date, only in specific versions of Skype. The best version of Skype to download & use is Skype for content creators. You can easily integrate Skype callers in your content or special programs like Finncast Studio. My experience using Skype with NDI has been very stable & Finncast allows you to control the volume for each Skype caller from their built-in audio mixer & they even have a mute button. This situation allows for remote interviews live using Skype, which is free for anyone to use.
So how do you receive the audio and video signals sent over the local network?
Hardware such as video cameras & software programs with NewTek NDI integrated send the audio & video over the network. This alone severs no purpose unless you have software such as Finncast Studio to receive the video and have full control over it. Think of it this way, video & audio is sent over the local network and we require usually specific software to received it. The publisher of the software will have features to view & control the footage. Of course, this is not necessarily video footage, it can also be a web browser, static images and so on. Programs like Finncast Studio will allow you to add the received signal to multi-screen, switch it through their built-in video switcher, adjust volume, color, brightness & contrast. Overlay other footage images on top of it.