External Output allows you to send audio and video out of vMix in a number of different ways:
2. To other applications running on the same PC such as Skype
3. To other devices on the network using NDI
Click the cog icon next to the External button in the main vMix window and then click Settings.
The External Output Settings window will be displayed. More more information on the options available see Settings - External Output.
Click the External Button next to the Cog Button to start or stop the output.
The Cog Button contains a drop down menu for selecting a source for External 2 in real time
(Available in vMix 4K and Pro)