This article describes video-integration in the Ardour3 Digital Audio Workstation to facilitate sound-track creation and film post-production. It aims to lay a foundation for users and developers, towards establishing a maintainable tool-set for using free-software in A/V soundtrack production. To that end a client-server interface for communication between non-linear editing systems is specified. The paper describes the reference implementation and documents the current state of video integration into Ardour3 and future planned development. In the final sections a user-manual and setup/install information is presented.