Abstract: A method for key play base transfer of a video between a server and a client over a network comprises initializing a session between the server and the client, wherein a key frame index is transferred to the client from the server. The method further comprises receiving a client request for content at the server, wherein the request comprises a key frame pointer and a parameter specifing a packet length, and sending a packet to the client in response to the request for content from the server, wherein the packet is a variable length according to the parameter.

Abstract: A system and method are provided for processing audio/video (A/V) data provided from multiple A/V sources. The system includes A/V data capture devices for receiving the A/V data, each of which receives A/V data from a predetermined number of A/V sources; drivers for driving output data of the A/V data capture devices for a first set of application programs, each of the drivers receiving output data from corresponding one of the A/V data capture devices and being associated with corresponding one of the first set of application programs; virtual drivers for driving input data for a second set of application programs, each of the virtual drivers being associated with corresponding one of the second set of application programs; and a channel mapping unit for mapping data from the drivers into the virtual drivers.