Method for aggregating and forwarding GB28181 media stream

Abstract

The invention discloses a method for aggregating and forwarding a GB28181 media stream. The method comprises the following steps of designing an SDP file through reading a transfer media data stream of the SDP file; reading a transfer configuration of the SDP file or carrying out reading configuration in a database mode; adding an SDPOutputInfo class structure into a transfer information header file with an SDP as a source; adding a function and a variable into a transfer information class structure with the SDP as the source in the transfer information header file with the SDP as the source;and creating a transfer output task by taking information with the SDP as the source as a creating basis, setting an attribute field a=sendonly of an audio and video media stream when a transfer tasksends SDP information loaded in an Announce instruction, and modifying a transfer object creation method to a method for creating the transfer information object by taking a transfer information structure with the SDP as the source as a parameter. According to the method, one-path data and multi-path copy and forwarding of front-end camera equipment, and safe isolation of the equipment and a peripheral access terminal are realized, equipment resources can use DNS (domain name resolution), a complex and tedious 20-bit national standard protocol is not needed, and the network bandwidth quality is ensured.

Description

technical field [0001] The invention relates to the field of computer communication, in particular to a method for converging and forwarding GB28181 media streams. Background technique [0002] The problems existing in the convergence and forwarding of existing media streams are as follows: [0003] 1: According to the national standard GB / T28181 "Technical Requirements for Information Transmission, Exchange and Control of Networked Security Video Surveillance System" agreement, when the camera supporting the national standard GB / T28181 protocol is registered to the SIP (Session Initiation Protocol) signaling server, the SIP signaling Make the server initiate a real-time video playback command, and the playback command includes the IP address of the media stream receiving end and the receiving port. At this time, the camera that supports the national standard GB / T28181 protocol receives the playback command and sends the specified destination IP and port in the command to P2...

AI Technical Summary

Problems solved by technology

[0003] 1: According to the national standard GB / T28181 "Technical Requirements for Information Transmission, Exchange and Control of Networked Security Video Surveillance System" agreement, when the camera supporting the national standard GB / T28181 protocol is registered to the SIP (Session Initiation Protocol) signaling server, the SIP signaling Make the server initiate a real-time video playback command, and the playback command includes the IP address of the media stream receiving end and the receiving port. At this time, the camera that supports the national standard GB / T28181 protocol receives the playback command and sends the specified destination IP and port in the command to P2P Therefore, in this way, if there are multiple media stream receiving purposes requesting real-time playback of the camera in the national standard GB / T28181 protocol system, the camera cannot bear the maximum connection path beyond its own hardware device settings. Generally, 10 channels is the upper limit, and too many accesses at the same time will also lead to unstable output of the camera code stream, which will cause very large limitations in the actual use of the national standard GB / T28181 protocol system

[0004] 2: For the specific security requirements of the monitoring system running under the GB / T28181 protocol system in the actual application scenario, it is impossible to allow the media stream receiving end to ask the front-end camera without management and authority, so that the front-end camera can directly receive the media stream It is difficult to achieve the security isolation requirements in actual use with the signaling of the existing GB28181 protocol and the organization and propagation of media streams.

[0005] 3: The platform interconnection under the GB / T28181 protocol system cannot guarantee that the multi-party platforms are in the same local area network or private network, nor can it guarantee that the front-end camera equipment and the media stream receiving end are in the same local area network or private network. The network structure GB / T28181 protocol system will cause great difficulties in the access of front-end equipment, such as accessing the front-end equipment through various 20-digit GB / T28181 numbers

[0006] 4: GB / T28181 still does not describe the QoS mechanism of the media data stream in the latest version 2016, so the system under the entire GB28181 protocol system runs the flow control of the network quality between the media stream sender and the media stream receiver hard to guarantee

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