This article is for setting up NDI streams to receive in Streamlabs OBS or other application. For information how to receive NDI streams in Streamlabs OBS see this article.
Create NDI stream with Scan Converter 2
NewTek NDI Tools found on the official website of NewTek contain various applications related to NDI, but one application can be used to capture the entire screen or a region of interest and send that as an NDI stream. The application of interest is called NewTek NDI Scan Converter and can be found in the installed location of the tools.
Once it runs, it is a very lightweight application capable of capturing any monitor automatically or you can select a region of interest you want to capture and transmit. You can access the menu of the application by right-clicking the icon in the system tray. You are also able to select an audio playback device from your computer to send that audio on the selected device with the stream if wanted.
Create NDI stream with vMix Desktop Capture
There is also vMix Desktop capture available from the creators of vMix that creates an NDI stream of every single open window and desktop available. You select which window or desktop you want as NDI stream in Streamlabs OBS rather than selecting in the application which to use.
Create NDI stream with a Mobile Device
NewTek, the inventor of NDI, has also made an iPhone and Android app that allows you to turn your mobile phone into an extra wireless NDI camera, which you can use as an NDI source. You can find more information about this application and the purchase link to the respective stores at their NDI camera page. Other applications, from other developers, could be available that do the same or similar.