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VTonDemand: a framework for indexing, searching and on-demand playback of RTP-based multimedia conferences

In this paper, we describe the implementation of a system for reliable recording and on-demand indexed playback of multimedia conferences using the services provided by RTP (Real-time Transport Protcol) and RTCP (Real-Time Control Protocol) over an intranet. Implementation issues are underlined regarding the file structure used to support random access during playback, the indexing techniques and the database searching capabilities.