Video connections

In the real world, patch cords are used to route video signals between sources, effects processors, and sinks. In the video system, video components are connected through their input and output ports. For example, you connect video components to mix images from two video sources in an effects processor and display the result:


Graphic ports

Like all media components, a video component has at least one port (input or output). You connect the components by connecting their port surrogates. For more information about general time-media components and ports, see "Building media networks" on page 291.

Graphic types

Video types are represented by TGraphicType, which is derived from TMediaType. The type specifies the format of the data that flows down a connection between video components. When two ports are connected, a type negotiation takes place to verify that the types of the ports match. If they do not match, an exception is thrown.

NOTE MGraphic is currently the only type supported by graphic input and output ports.

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