Network A/V in OBS Studio with NewTek's NDI technology.

• NDI Source : receive NDI video and audio in OBS
• NDI Output : transmit OBS video and audio to NDI
• NDI Filter (a.k.a NDI Dedicated Output) : transmit a single OBS source or scene audio to NDI

• OBS >=28
• NDI 5 Runtime (optionally installed via NDI Tools)

1. Download and install the Linux, MacOS, or Windows version at Releases.
   • Linux:
     1. Download obs-ndi-4.11.1-linux-x86_64.deb
     2. sudo dpkg -i obs-ndi-4.11.1-linux-x86_64.deb
   • MacOS:
     1. Download obs-ndi-4.11.1-macos-universal.pkg
     2. Run obs-ndi-4.11.1-macos-universal.pkg
   • Windows:
     1. Download obs-ndi-4.11.1-windows-x64-Installer.exe
     2. Run obs-ndi-4.11.1-windows-x64-Installer.exe
2. Download and install the NDI 5 runtime from:
   • Linux:

     #!/bin/bash
     set -e
     LIBNDI_INSTALLER_NAME="Install_NDI_SDK_v5_Linux"
     LIBNDI_INSTALLER="$LIBNDI_INSTALLER_NAME.tar.gz"
     LIBNDI_INSTALLER_SHA256="00d0bedc2c72736d82883fc0fd6bc1a544e7958c7e46db79f326633d44e15153"
     pushd /tmp
     sudo apt-get install curl
     curl -L -o $LIBNDI_INSTALLER https://downloads.ndi.tv/SDK/NDI_SDK_Linux/$LIBNDI_INSTALLER -f --retry 5
     echo "$LIBNDI_INSTALLER_SHA256 $LIBNDI_INSTALLER" | sha256sum -c
     tar -xf $LIBNDI_INSTALLER
     yes | PAGER="cat" sh $LIBNDI_INSTALLER_NAME.sh
     rm -rf ndisdk
     mv "NDI SDK for Linux" ndisdk
     sudo cp -P ndisdk/lib/x86_64-linux-gnu/* /usr/local/lib/
     sudo ldconfig
     echo libndi installed to /usr/local/lib/
     ls -la /usr/local/lib/libndi*
     rm -rf ndisdk
     popd
     

* MacOS: http://ndi.link/NDIRedistV5Apple
* Windows: http://ndi.link/NDIRedistV5

Reference: https://obsproject.com/kb/plugins-guide#install-or-remove-plugins

1. rm -rf ~/.config/obs-studio/plugins/obs-ndi
2. Optionally delete NDI Runtime:

   1. sudo rm /usr/local/lib/libndi*.*
      sudo ldconfig
      

1. Open Finder
2. Show hidden files with Command-Shift-.
3. Delete ~/Library/Application Support/obs-studio/plugins/obs-ndi.plugin
4. Optionally delete NDI Tools/Runtime:
   1. Finder->Applications: Delete all NDI * applications
   2. Delete /Library/Application Support/NewTek/NDI
   3. Delete /usr/local/lib/libndi.*

1. Add/Remove Programs
2. Delete %ProgramFiles%\obs-studio\obs-plugins\64-bit\obs-ndi.*
3. Optionally delete NDI Tools/Runtime:
   1. Add/Remove Programs
   2. Delete %ProgramFiles%\NDI\NDI 5 Runtime
   3. Delete %ProgramFiles%\NDI\NDI 5 Tools

In PowerShell v5 terminal:

git clone https://github.com/obs-ndi/obs-ndi.git
cd obs-ndi
.github/scripts/Build-Windows.ps1
...
tbd...

NOTE: Only Debian and Ubuntu are officially supported

In terminal:

git clone https://github.com/obs-ndi/obs-ndi.git
cd obs-ndi
.github/scripts/build-linux.sh
...
sudo cp -r release/obs-plugins/64bit/* /usr/local/lib/x86_64-linux-gnu/obs-plugins/
...
sudo cp -r release/data/obs-plugins/* /usr/local/share/obs/obs-plugins/
...
sudo ldconfig

In terminal:

git clone https://github.com/obs-ndi/obs-ndi.git
cd obs-ndi
.github/scripts/build-macos.zsh
...
cp -r release/obs-ndi.plugin ~/Library/Application\ Support/obs-studio/plugins/
...

Subsequent builds can be sped up by using build-macos.zsh --skip-deps.
[For some reason --skip-all doesn't work.]
See build-macos.zsh --help for more details.

From a bash shell (confirmed also works on WSL):

.github/scripts/check-format.sh 1

NOTE: obs-ndi is based on obsplugin-template that requires clang-format-13:

if type clang-format-13 2> /dev/null ; then
    CLANG_FORMAT=clang-format-13
elif type clang-format 2> /dev/null ; then
    # Clang format found, but need to check version
    CLANG_FORMAT=clang-format
    V=$(clang-format --version)
    if [[ $V != *"version 13.0"* ]]; then
        echo "clang-format is not 13.0 (returned ${V})"
        exit 1
    fi
else
    echo "No appropriate clang-format found (expected clang-format-13.0.0, or clang-format)"
    exit 1
fi

MacOS brew only has formulaes for clang-format 15, 11, or 8. If you want to check-format on MacOS then you will need to:

1. brew install clang-format
2. edit .github/scripts/check-format.sh and change all 13 to 15
3. !!DO NOT COMMIT THESE CHANGES!!