Media stream capturing method, system and device

Abstract

The invention provides an acquiring method of media flow, the method comprises: a purpose end sends the request information of acquiring media flow to a to-end or source end, the request information of acquiring media flow comprises the information of the needed acquired media flow; the purpose end acquires the media flow which is switched in a conversation between the purpose end and the to-end from at least one source conversation between the source end and the to-end by the to-end and the source end based on the information of the media flow which the purpose end needs to acquire. Acquiring part or all of the media flow from one or more source conversation can be realized by the acquiring method and system of the media flow provided by the embodiment of the invention.

Description

technical field [0001] The invention relates to the technical field of multimedia communication, in particular to a method for acquiring a media stream, a system and a device thereof. Background technique [0002] Session Initiation Protocol (SIP, Session Initiation Protocol) is one of the multimedia communication system framework protocols formulated by the Internet Engineering Task Force (IETF, Internet Engineering Task Force). It is a text-based application layer control protocol, which is independent of the underlying protocol. Used to establish, modify and terminate multimedia sessions over the Internet. In SIP, a multimedia session is composed of a group of multimedia senders and receivers and their data streams between each other. A multimedia session uses SIP for dialogue and follows SIP rules when sending requests during the dialogue. The dialogue refers to a SIP relationship between the communication parties, which provides necessary state information for routing ...

AI Technical Summary

Problems solved by technology

[0025] From the above session acquisition process, it can be seen that when UA2 accepted the INVITE request containing the Replaces header field, it switched the entire session belonging to UA3 to UA1, but UA1 could not obtain part of the media stream in the original session, and the INVITE request The Replaces header field can only appear once, so UA1 cannot obtain media streams in multiple sessions

Therefore, during the creation process of the present invention, the inventor found that there are at least the following problems in the prior art: the session acquisition method provided by the prior art can only acquire one session, and cannot acquire part or all of the media in one or more sessions flow

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