Just In Engine.app has access to the specific Video Hardware Devices (AJA/BMD) and/or NDI streams, it is responsible for the encoding processes and for writing the video and metadata files to the chosen destinations. Once started it runs and works in the background, as all settings can be done within the Just Control.app. The Just In Engine.app can be run on the same machine as the Just Control.app or on a separate macOS machine.