A system and method are disclosed for configuring video ports on a computer. An operating system is used to generate a visual user interface comprising a plurality of icons representing video input sources coupled to a tuner and a plurality of icons representing tuner output channels. A user provides input data to associate individual video input sources with individual tuner output channels, thereby generating a set of predetermined video source-channel associations. Appropriate control signals are then used to process video data in accordance with said predetermined video source-channel associations.