The invention provides a method and system for the automated post production of a single video file, the method comprising the steps of gathering video data from a plurality of camera sources; gathering audio data from a plurality of microphone sources; using an automated tracking offline algorithm to track a sound emitting from a moving target object in a 3D space, to provide localization data of said target object to identify an optimum camera source to provide video data of said target object; and composing a composite video sequence of said moving target from a plurality of identified optimum camera sources in a single video file. The algorithm relies on both video data from multiple camera views and audio data from multiple microphone arrays to infer the 3D position of the active speaker over the duration of the captured presentation.