WO2022241990A1 - Procédé et appareil de gestion de liaison de transmission multimédia, et support de stockage - Google Patents

Procédé et appareil de gestion de liaison de transmission multimédia, et support de stockage Download PDF

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Publication number
WO2022241990A1
WO2022241990A1 PCT/CN2021/119993 CN2021119993W WO2022241990A1 WO 2022241990 A1 WO2022241990 A1 WO 2022241990A1 CN 2021119993 W CN2021119993 W CN 2021119993W WO 2022241990 A1 WO2022241990 A1 WO 2022241990A1
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WIPO (PCT)
Prior art keywords
target
transcoding
media
session module
request
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PCT/CN2021/119993
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English (en)
Chinese (zh)
Inventor
张凯
范瑞
刘海军
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武汉中科通达高新技术股份有限公司
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Publication of WO2022241990A1 publication Critical patent/WO2022241990A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1101—Session protocols
    • H04L65/1104—Session initiation protocol [SIP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
    • H04L69/164—Adaptation or special uses of UDP protocol
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/765—Interface circuits between an apparatus for recording and another apparatus
    • H04N5/77—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television camera

Definitions

  • the embodiments of the present application relate to the technical field of media transmission, and in particular, to a method, device, and storage medium for media transmission link management.
  • a service terminal wants to invite a camera’s video
  • two links need to be maintained, one is the session initiation protocol (Session initiation Protocol, SIP) uplink to initiate a session invitation to the camera
  • SIP Session initiation Protocol
  • the established SIP communication link the other is the media link between the camera and the media server (used to send video to the media server), but the process of establishing the SIP communication link takes a long time, if there are other services in this process
  • the terminal requests the camera's video, it will cause network congestion in the camera's data stream transmission.
  • Embodiments of the present application provide a media transmission link management method, device, and storage medium, which can effectively avoid network congestion in camera data stream transmission.
  • the embodiment of the present application provides a media transmission link management method, including:
  • the transcoding server receives the request information for requesting the data stream of the target camera sent by the service terminal; detects whether there is a transcoding session module corresponding to the target camera, and if not, sends the request information to the dispatcher center, and create a target transcoding session module based on the target camera, cache the request information into the target request cache list of the target transcoding session module, and send a session invitation to the target camera at the scheduling center until the completion During the session, cache all received request information for the data stream of the target camera into the target request cache list;
  • the dispatch center creates a target dispatch session module based on the target camera, sends the session invitation to the target camera based on the target dispatch session module, and if the normal status code returned by the target camera based on the session invitation is received , then send the normal status code to the transcoding server, and send a notification message to the target camera to notify the target camera to send the data stream, and send the request information to the media server to causing the media server to create a target media session module based on the target camera to receive the data stream;
  • the transcoding server creates a first media transmission link between the target transcoding session module and each service terminal corresponding to each request information in the target request cache list, and creates the target transcoding session module and a second media transmission link between the target media session modules;
  • the media server sends the data stream received by the target media session module to the target transcoding session module based on the second media transmission link;
  • the transcoding server distributes the data stream received by the target transcoding session module to each service terminal based on the first media transmission link.
  • the step of the transcoding server creating the first media transmission link between the target transcoding session module and each service terminal corresponding to each request information in the target request cache list includes:
  • the transcoding server traverses the target request cache list, and creates a corresponding video transmission service for each request information in the target request cache list;
  • the transcoding server sends the address information of the video transmission service to each service terminal corresponding to each request information through the request identifier of each request information in the target request cache list, so that the Each service terminal sends access request information based on the address information;
  • the transcoding server creates a first media transmission link between the target transcoding session module and each service terminal based on the access request information.
  • the media transmission link management method further includes:
  • the dispatch center If the dispatch center receives the abnormal status code returned by the target camera based on the session invitation, then send the abnormal status code to the transcoding server;
  • the transcoding server After receiving the abnormal status code, the transcoding server releases the target transcoding session module, generates a request failure message, and sends the request failure message to each service terminal.
  • the step of the transcoding server receiving the request information sent by the service terminal for requesting the data stream of the target camera includes:
  • the transcoding server receives the text data sent by the business terminal based on the full-duplex communication protocol websocket, the text data includes a target request identifier and a target camera identifier, and the target request identifier is used to identify the request corresponding to the text data, so The target camera identifier is used to identify the target camera.
  • the step of the transcoding server sending the request information to the dispatch center includes:
  • the transcoding server converts the text data into binary data
  • the transcoding server sends the binary data to the dispatch center.
  • the media transmission link management method further includes:
  • the transcoding server adds the target transcoding session module to a transcoding session mapping table, and the transcoding session mapping table is used to characterize the correspondence between camera identifiers and transcoding session modules; and/or,
  • the dispatching center adds the target dispatching session module to a dispatching session mapping table, and the dispatching session mapping table is used to characterize the correspondence between camera identifiers and dispatching session modules.
  • the media transmission link management method further includes: if the transcoding server detects that there is a transcoding session module corresponding to the target camera, then detecting whether the data stream has been accessed; access, create the first media transmission link, and send the address information of the first media transmission link to the service terminal.
  • the step of creating the second media transmission link between the target transcoding session module and the target media session module by the transcoding server includes:
  • the transcoding server sends a registration packet to the registration monitoring service unit of the target media session module through the target transcoding session module to create a data stream forwarding service between the target transcoding session module and the target media session module A second media transport link between units.
  • the step of the transcoding server sending the registration packet to the registration monitoring service unit of the target media session module through the target transcoding session module it also includes:
  • the media server receives the logout packet sent by the transcoding server through the target transcoding session module through the registration monitoring service unit, remove the target transcoding session module from the distribution list.
  • the step of the transcoding server distributing the data stream received by the target transcoding session module to the service terminals based on the first media transmission link includes:
  • the transcoding server performs packet loss detection, rearrangement, packet assembly and encapsulation processing on the data stream to obtain media serialization packets;
  • the transcoding server distributes the media serialization package to each service terminal based on the first media transmission link.
  • the embodiment of the present application provides a media transmission link management device, including:
  • Transcoding server dispatch center and media server
  • the transcoding server is used to receive the request information sent by the service terminal for requesting the data flow of the target camera; detect whether there is a transcoding session module corresponding to the target camera, and if not, send the request information to send to the dispatching center, and create a target transcoding session module based on the target camera, cache the request information into the target request cache list of the target transcoding session module, and send the request information to the dispatching center to the When the target camera sends a session invitation until the session is completed, all received request information for the data stream of the target camera is cached in the target request cache list;
  • the scheduling center is configured to create a target scheduling session module based on the target camera, and send the session invitation to the target camera based on the target scheduling session module, and if the target camera returns based on the session invitation normal status code, send the normal status code to the transcoding server, and send a notification message to the target camera to notify the target camera to send the data stream, and send the request message to the target camera
  • the media server so that the media server creates a target media session module based on the target camera to receive the data stream;
  • the transcoding server is further configured to create a first media transmission link between the target transcoding session module and each service terminal corresponding to each request information in the target request cache list, and create the target transcoding A second media transmission link between the code session module and the target media session module;
  • the media server is configured to send the data stream received by the target media session module to the target transcoding session module based on the second media transmission link;
  • the transcoding server is further configured to distribute the data stream received by the target transcoding session module to each service terminal based on the first media transmission link.
  • transcoding server is specifically used for:
  • the dispatching center is further configured to send the abnormal status code to the transcoding server if the abnormal status code returned by the target based on the session invitation is received; the transcoding server further uses After receiving the abnormal status code, release the target transcoding session module, generate a request failure message, and send the request failure message to each service terminal.
  • the transcoding server is specifically used to receive the text data sent by the service terminal based on the full-duplex communication protocol websocket, the text data includes the target request identifier and the target camera identifier, and the target request identifier is used to identify the text In the request corresponding to the data, the target camera identifier is used to identify the target camera.
  • the transcoding server is specifically configured to convert the text data into binary data; and send the binary data to the dispatch center.
  • the transcoding server is further configured to add the target transcoding session module to a transcoding session mapping table, and the transcoding session mapping table is used to characterize the correspondence between camera identifiers and transcoding session modules; and/ Or, the dispatching center is further configured to add the target dispatching session module to a dispatching session mapping table, and the dispatching session mapping table is used to represent a correspondence between camera identifiers and dispatching session modules.
  • the transcoding server is further configured to detect whether the data stream has been accessed if it is detected that there is a transcoding session module corresponding to the target camera, and if the data stream has been accessed, create the the first media transmission link, and send the address information of the first media transmission link to the service terminal.
  • the transcoding server is specifically configured to send a registration packet to the registration monitoring service unit of the target media session module through the target transcoding session module, so as to create a session between the target transcoding session module and the target media session
  • the data flow of the modules is forwarded to the second media transmission link between the service units.
  • the media server is further configured to set the target transcoding session
  • the module is added to the distribution list; if the logout packet sent by the transcoding server through the target transcoding session module is received through the registration monitoring service unit, the target transcoding session module is removed from the distribution list .
  • the transcoding server is specifically configured to perform packet loss detection, rearrangement, packetization, and encapsulation processing on the data stream to obtain a media serialization packet; based on the first media transmission link, transfer the media The serialized package is distributed to each service terminal.
  • Still another aspect of the embodiments of the present application provides a storage medium, which includes instructions, which, when run on a computer, cause the computer to execute the method in any embodiment of the first aspect above.
  • the solution provided by the embodiment of the present application firstly create a transcoding session module, a scheduling session module, and a media session module corresponding to the camera, and request the data stream of the camera based on the created modules, using a modular
  • the media transmission link management method ensures the independence of the business and has the characteristics of low coupling; then, the request cache list provided by the transcoding session module is used to cache all the request information for the camera data stream, so that only one channel needs to be reserved Request to ensure the uniqueness of the media link between the dispatch center and the camera; finally, make full use of the distribution advantages brought by the high bandwidth of the media server to solve the problem of insufficient distribution capabilities caused by the small network bandwidth of the camera. Therefore, the problem of network congestion in the data stream transmission of the camera can be effectively avoided.
  • Figure 1a is a system architecture diagram of the operation of a media transmission link management device provided by the embodiment of the present application
  • FIG. 1b is a schematic diagram of request caching through the ws request caching list of the transcoding session module provided by the embodiment of the present application;
  • FIG. 2 is an architecture diagram of a media transmission link management system provided by an embodiment of the present application
  • FIG. 3 is a flow chart of a method for managing a media transmission link provided in an embodiment of the present application
  • FIG. 4 is a schematic diagram of a transcoding session mapping table provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a scheduling session mapping table provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a link between a dispatch center, a camera, and a media server provided in an embodiment of the present application;
  • FIG. 7 is a schematic structural diagram of a media transmission link management device provided by an embodiment of the present application.
  • modules or sub-modules described as separate components may or may not be physically separated, may or may not be physical modules, or may be distributed into multiple circuit modules, and some or all of them may be selected according to actual needs module to achieve the purpose of the embodiment of the application.
  • the embodiment of the present application provides a media transmission link management method, which is applied to a media transmission link management device.
  • the media transmission link management method is mainly used in urban monitoring and alarm networking systems, intelligent transportation systems, Surveillance system, used to build a bridge between traditional security surveillance video and Internet video, to achieve the purpose of converting traditional surveillance video into Internet video stream (data stream), simplifying the acquisition of national standard (GB) equipment video stream, and effectively avoiding GB
  • the transmission link of the device data flow is congested.
  • Traditional surveillance video refers to the video data collected by the front-end camera (front-end camera).
  • the terminal (user terminal) calls the video data.
  • the user terminal includes the client and the platform terminal that are registered and authorized by the urban monitoring and alarm network system or the intelligent transportation system, and have operation requirements for the data and equipment in the system.
  • the client includes Traffic police terminals
  • platform terminals include terminals included in other platforms in the system, such as terminals of transcoding platforms, etc.
  • the user terminal includes, but is not limited to, a smart phone, a tablet computer, a notebook computer, a smart TV, a smart robot, a personal computer (PC, Personal Computer), a wearable device, a server computer, and the like.
  • the media transmission link management method provided by the embodiment of this application is executed by a media transmission link management device, which can run on the system architecture shown in Figure 1a, please refer to Figure 1a, which is an embodiment of this application Provided is a system architecture diagram for the operation of a media transmission link management device.
  • the system includes service terminals (such as service terminal 1 and service terminal N), a transcoding server, a dispatch center, a media server, and a camera.
  • the link between the service terminal and the transcoding server includes a full dual Industrial communication protocol (websocket, ws) transmission control link and ws video transmission link.
  • the ws transmission control link is used to send information. It is a two-way transmission link with a long connection.
  • the life cycle is controlled by the business terminal, and the transcoding server will not Actively close the link.
  • the ws video transmission link is created by the transcoding server after the transcoding server receives the normal status code (200). It is a one-way transmission link (from the transcoding server to the business terminal).
  • the link between the transcoding server and the dispatch center is a Transmission Control Protocol (Transmission Control Protocol, TCP) link, which is a bidirectional transmission link.
  • TCP Transmission Control Protocol
  • the link between the dispatch center and the camera is a session initiation protocol (Session initiation Protocol, SIP) link, which is a bidirectional transmission link.
  • the link between the dispatch center and the media server is a TCP link, which is a two-way transmission link.
  • the link between the camera and the media server is a video transmission link, such as a User Datagram Protocol (UDP) link (UDP command control link), which is a one-way transmission link (camera to media server).
  • the link between the media server and the transcoding server includes a video transmission link and a UDP command control link.
  • the video transmission link is a one-way transmission link (from the media server to the transcoding server), and the UDP command control link is a one-way transmission link.
  • Transport link (transcoding server to media server).
  • the embodiment of the present application provides the following media transmission link management solution: the service terminal sends a ws target request for requesting the data stream of the camera to the transcoding server, and the transcoding server determines whether the ws target request is For the first ws request of the data stream of the camera (the transcoding server will create a corresponding transcoding session module (transcoding session) based on the identity of the camera for the ws request of the data stream of different cameras, if there is no corresponding transcoding session module, it means that it is the first ws request), if the transcoding server determines that the ws target request is the first request, it will create a transcoding session module, and the transcoding session module provides a ws request cache list, and the ws request cache list not only The ws target request is cached, and all subsequent received ws requests for the data stream of the camera will be cached.
  • the transcoding server determines whether the ws target request is For the first ws request of the data stream of the camera (
  • the ws request usually carries the request identifier and the camera identifier, so the ws request cache list will also include the request identifier and the camera identifier, where the request identifier is used to help the service terminal distinguish which request the corresponding response is from.
  • Figure 1b is a schematic diagram of request caching provided by the embodiment of the present application through the ws request cache list of the transcoding session module. In the figure, the first ws request, the second ws request, and the third ws request requests for request caching.
  • the transcoding server only when the transcoding server creates a transcoding session module when ws is requested for the first time, when the subsequent transcoding server receives a ws request, the transcoding server does not need to create a transcoding session module again, and directly caches the ws request to the ws request cache list In this way, all the ws requests for multiple requests for the data stream of the same camera are managed in a unified manner, and only one request is reserved, thus ensuring the uniqueness of the SIP video link between the dispatch center and the camera.
  • the transcoding server will send the ws target request to the scheduling center, and the scheduling center will create a scheduling session module (scheduling session) associated with the camera, and the scheduling center will send a session invitation to the camera.
  • Normal status code send the normal status code to the transcoding server, and notify the camera to start sending data streams, and convert the ws target request into a binary request and send it to the media server, so that the media server creates a media session module associated with the camera (media session) to receive the data stream sent by the camera.
  • the transcoding server After the transcoding server receives the normal status code, the transcoding server creates the first media transmission link between the transcoding session module and the service terminal (the transcoding server traverses the ws request cache list of the transcoding session module, and the ws request cache list Create a corresponding ws video transmission service (ws video service) for each ws request in , and then pass the address of the ws video transmission service to the service terminal corresponding to each ws request through the ws request identifier (ws handle) of the ws request cache list , after receiving the address, each service terminal actively accesses in to build the first media transmission link), and creates a second media transmission link between the transcoding session module and the media session module (as shown in Figure 1a , there are two transmission links between the transcoding server and the media server, one is the UDP command control link, which is to register with the media session module of the media server, after the registration is completed, the media server will transfer the data transmitted by the camera sent to the transcoding server
  • the media server sends the data stream received by the media session module to the transcoding session module through the second media transmission link. Based on the address sent by the transcoding server, each service terminal accesses the ws video transmission service created by the transcoding server, and obtains the data stream provided by the ws video transmission service through the web page.
  • Figure 2 is an architecture diagram of a media transmission link management system provided by the embodiment of this application, as many ws requests are opened in the ws request cache list ws video service, constructing the media transmission link between the business terminal and the transcoding server, such as ws1, ws2 and wsN in Figure 2, ws1 corresponds to video service 1, ws2 corresponds to video service 2, wsN corresponds to video service N, and the packet service is used for Carry out packet loss detection, rearrangement, grouping and encapsulation processing on the data flow, and the media session module includes a registration monitoring service unit and a data flow forwarding service unit.
  • the video service 1 in the transcoding session module will be disconnected. If all service terminals are detected Close the webpage, then disconnect all video services in the transcoding session module, and the transcoding server will notify the media server, so that the media server removes the data stream forwarding service unit in the media session module, and the media server will notify the dispatching center again, After receiving the notification, the dispatch center closes the link with the camera.
  • Figure 3 is a flow chart of a media transmission link management method provided by the embodiment of the application, the embodiment of the application at least includes follows the steps below:
  • the transcoding server receives the request information sent by the service terminal for requesting the data stream of the target camera; detects whether there is a transcoding session module corresponding to the target camera, and if not, sends the request information to the dispatcher center, and create a target transcoding session module based on the target camera, cache the request information into the target request cache list of the target transcoding session module, and send a session invitation to the target camera at the dispatch center Until the process of completing the session, cache all received request information for the data stream of the target camera into the target request cache list;
  • the user when the user needs to call the data stream of a certain front-end camera, the user can send a ws request for the data stream of the target camera to the transcoding server on the client side of the service terminal, and the ws request can be controlled by ws transmission
  • the link is sent to the transcoding server, so that the transcoding server can receive the ws request sent by the business terminal.
  • the transcoding server will check whether there is a transcoding session module corresponding to the target camera.
  • the ws request is the first request for the data stream of the target camera, and then based on the target
  • the camera creates a target transcoding session module, caches the ws request into the target request cache list of the target transcoding session module, and sends all received requests for the target camera during the process of sending the session invitation to the target camera until the session is completed by the dispatch center.
  • the request information of the data stream is cached in the target request cache list; the request information is sent to the dispatch center.
  • the purpose of the dispatch center sending the session invitation to the target camera is to coordinate resources to ensure that the camera can send data streams to the media server. If the session invitation is successful, it means that the camera can send data streams to the media server.
  • the transcoding session module will only be created when the first request is made. Assuming that the ws1 request is the first request, when the transcoding server receives ws1 When requesting, a transcoding session module will be created, and the ws1 request will be stored in the request cache list provided by the transcoding session module (including the request ID of the ws1 request and the camera ID of the target camera a), and the ws2 request will be received on the transcoding server And after the ws3 request, store the ws2 request and ws3 request in the request cache list (including the request ID of the ws2 request and the request ID of the ws3 request), and all the ws requests stored in the request cache list correspond to the target camera a .
  • the transcoding server may receive a lot of request information for the data stream of the target camera, so the transcoding server The code server can cache these request information into the target request cache list, so as to uniformly manage all the requests requesting the data stream of the same target camera.
  • the transcoding server only sends the request information of one channel to the dispatch center, that is, for multiple requests for the data stream of the same target camera, the transcoding server deduplicates the multiple requests and only keeps one request. Request to request the dispatching center to send a session invitation to the target camera.
  • each service terminal accesses the ws video transmission service created by the transcoding server based on the address sent by the transcoding server. Get the data stream provided by the ws video delivery service. That is, the transcoding server only needs to maintain one transmission channel to control the distribution of data streams to multiple service terminals, realizing real-time preview of the real-time data stream of the same camera by multiple service terminals.
  • ws is a long connection based on TCP transmission, compared to Hypertext Transfer Protocol (Hyper The request-response model of Text Transfer Protocol (HTTP) is more in line with the GB/T28181 application scenario of this application, because after the GB/T28181 request (request information) is sent, there is a response delay, and the ws long connection can be used in GB/T28181 Wait for a long time while the request is being processed.
  • HTTP Hypertext Transfer Protocol
  • the transcoding server can use the saved ws request handle (target request identifier) to pass the ws long
  • the connection returns the response data to the user terminal, thereby improving the service terminal's understanding efficiency of the request information and improving the user experience.
  • the transcoding server For ws requests, the transcoding server is responsible for processing them instead of the scheduling center.
  • the main reasons are as follows: 1. Uniformity. In order to avoid maintaining two ws requests on the transcoding server and scheduling center at the same time, the transcoding 2. To maintain the scalability of the system, in a practical application scenario, each public security department only needs to allocate one transcoding server, and the transmission between the public security department and the transcoding server is internal transmission, and the speed is guaranteed , avoiding problems such as network crossing and opening up borders.
  • the transcoding server will receive multiple request information, and each business terminal can request the data stream of the same front-end camera, and each business terminal It is also possible to request data streams from different front-end cameras.
  • the data stream of the front-end camera can be called by the cascading platform, and then the cascading platform will send the data stream to the media server.
  • the cascading platform includes upper-level platforms and lower-level platforms. It is composed of a provincial level platform, a city level platform and a district level platform.
  • the national level platform can actively call the data of the city level platform, and the city level platform can actively call the data of the district level platform.
  • the platforms are based on GB /T28181 signaling for data transmission, and the cascading between platforms realizes the interconnection and intercommunication between different platforms and realizes effective resource integration.
  • the device list includes device 1, device 2, and device 3, among which , Device 1, Device 2, and Device 3 respectively correspond to three different front-end cameras.
  • the user triggers any of the devices, such as device 1, according to the information of the front-end camera corresponding to device 1, a request (request information) for obtaining the data stream of the front-end camera is generated, and the request is sent to the transcoding server.
  • the data stream can be a real-time data stream or a historical data stream
  • the request information usually carries the front-end identification information of the target camera (target camera ID).
  • the transcoding server will save the front-end identification information of the target camera corresponding to the data stream, and the transmission of the real-time data stream can be understood as a 1-to-N link transmission;
  • the data stream is a historical data stream, The transcoding server will save the front-end identification information of the target camera corresponding to the data stream, and assign a static value and save it.
  • the transmission of the historical data stream can be understood as a 1-to-1 link transmission.
  • the transcoding server saves the following four sets of information: (front-end camera 1, static value 1), (front-end camera 1, static value 2), (front-end camera 1, Static value 3), (front-end camera 1, static value 4); if there are 4 real-time data streams for obtaining front-end camera 1, the transcoding server saves the following set of information: (front-end camera 1).
  • the step of the transcoding server receiving the request information sent by the service terminal for requesting the data stream of the target camera includes:
  • the transcoding server receives the text data sent by the business terminal based on the full-duplex communication protocol websocket, the text data includes a target request identifier and a target camera identifier, and the target request identifier is used to identify the request corresponding to the text data, so The target camera identifier is used to identify the target camera.
  • step of the transcoding server sending the request information to the dispatch center includes:
  • the transcoding server converts the text data into binary data
  • the transcoding server sends the binary data to a dispatch center
  • the transcoding server After receiving the text data, the transcoding server will encrypt and binary convert the text data to obtain binary encrypted data, and then send the encrypted data to the dispatch center through a private protocol. It should be noted that the use of private protocols and encryption algorithms can improve the security of link transmission and avoid transmission packet loss. It should be noted that the dispatch center in this embodiment performs link transmission with the transcoding server and the media server respectively through a proprietary protocol, and the link transmission between the dispatch center and the target camera is performed through the GB/T28181 protocol.
  • the method also includes:
  • transcoding session mapping table is used to characterize the correspondence between camera identifiers and transcoding session modules
  • the target scheduling session module is added to the scheduling session mapping table, and the scheduling session mapping table is used to represent the corresponding relationship between the camera identifier and the scheduling session module.
  • Fig. 4 is a schematic diagram of a transcoding session mapping table provided by the embodiment of the present application.
  • the camera identifier a corresponds to the transcoding session module A (transcoding session A)
  • the camera identifier b corresponds to the transcoding session Session module B (transcoding session B).
  • Figure 5 is a schematic diagram of a scheduling session mapping table provided by the embodiment of the present application. Camera ID a corresponds to scheduling session module A (scheduling session A), and camera ID b corresponds to transcoding session module B (scheduling session B).
  • the scheduling session module in the scheduling session mapping table is used to represent the GB/T28181 link (SIP link) between the camera and the scheduling center.
  • the GB/T28181 link is shown as link a and link b in the figure.
  • the GB/T28181 link depends on the status code. If the status code received by the dispatch center is not 200 (indicating that the session invitation failed), the GB/T28181 link needs to be removed from the dispatch session mapping table, that is, the dispatch session module needs to be removed , the dispatching center removes the relevant dispatching session module in the dispatching session mapping table, and tells the transcoding server at the same time, the transcoding server will release the relevant transcoding session module synchronously, and notify the session invitation failure message by requesting the cache list, so as to Indicates that the session invitation failed.
  • the dispatch center If the status code received by the dispatch center is 200 (indicating that the session invitation is successful), it will tell the transcoding server that the transcoding server knows that the session invitation is successful, and the transcoding server will not release the relevant transcoding session module. Therefore, in some possible embodiments, it further includes: if the dispatch center receives the abnormal status code returned by the target camera based on the session invitation, sending the abnormal status code to the transcoding server ; After receiving the abnormal status code, the transcoding server releases the target transcoding session module, generates a request failure message, and sends the request failure message to each service terminal.
  • it also includes:
  • the transcoding server detects that there is a transcoding session module corresponding to the target camera, then detect whether the data stream has been accessed, and if the data stream has been accessed, then create the first media transmission chain and send the address information of the first media transmission link to the service terminal.
  • the transcoding server detects that there is a transcoding session module corresponding to the target camera, it further includes:
  • the transcoding server caches the request information into the target request cache list.
  • the transcoding server detects that there is a transcoding session module corresponding to the target camera, it means that the current request information is not the first request, and the transcoding server needs to further determine whether the data stream has been accessed, if the data stream has been accessed , the transcoding server directly creates the first media transmission link between the service terminal and the transcoding server, and sends the address information of the first media transmission link to the service terminal, so that the service terminal obtains the data flow.
  • the transcoding server needs to add the request information to the target request cache list (including the target request ID (handle)). After receiving the data stream, the transcoding server will also add the target request ID Return to the service terminal to help the service terminal distinguish which request corresponds to.
  • the dispatch center creates a target dispatch session module based on the target camera, sends the session invitation to the target camera based on the target dispatch session module, and if the target camera returns a normal response based on the session invitation, status code, then send the normal status code to the transcoding server, and send a notification message to the target camera to notify the target camera to send the data stream, and send the request information to the media server , so that the media server creates a target media session module based on the target camera to receive the data stream;
  • the dispatch center can create a target dispatch session module based on the target camera corresponding to the request information, and send a session invitation to the target camera based on the target dispatch session module, if the dispatch center receives the target camera based on The normal status code returned by the session invitation (indicating that the session invitation is successful, and the target camera can send data stream), then the normal status code is sent to the transcoding server, and an acknowledgment (Acknowledge, ACK) message is sent to the target camera to notify the target camera
  • the data stream can be sent, and the request information is sent to the media server, so that the media server creates a target media session module based on the target camera to receive the data stream.
  • FIG. 6 is a schematic diagram of a link between a dispatch center, a camera, and a media server provided in an embodiment of the present application, wherein a tcp bidirectional transmission link is used between the dispatch center and the media server, and the target media session created by the media server
  • the module corresponds to the camera, and the target media session module includes a registration monitoring service unit and a data stream forwarding service unit.
  • the camera starts to transmit the data stream to the media server, and the media server will perform the following operations: 1. Enable the registration monitoring service of the registration monitoring service unit; 2. Enable the data stream forwarding of the data stream forwarding server unit Serve. It should be noted that there will be N media session modules similar to the target media session module in the media server.
  • Different media session modules correspond to different cameras. The essence is to solve the problem of small network bandwidth of the camera.
  • the small bandwidth of the camera does not have a good distribution capability, but the media server has a high network bandwidth, so it has a strong distribution capability.
  • the registration monitoring service plays a role of communicating with the transcoding server, including registration and logout functions.
  • the transcoding server sends a registration packet to the registration monitoring service unit of the target media session module through the target transcoding session module
  • the media server will The target transcoding session module is added to the distribution list, and the media server sends the data stream to the target transcoding session module in the distribution list after receiving the data stream.
  • the media server when the transcoding server sends a logout packet to the registration monitoring service unit of the target media session module through the target transcoding session module, the media server will remove the transcoding session module from the distribution list.
  • the media server determines the life cycle of the communication link between the dispatch center and the camera. For this reason, the media server starts the following two detection logics: detection logic 1, which detects the link between the media server and the camera. For example, the media server detects 10s If the number of received packets is 0, the dispatch center will be notified to close the link with the camera, and the dispatch center will also notify the transcoding server to close the corresponding link.
  • Detection logic 2 after the transcoding server sends a logout packet and the media server logs out, the media server detects whether the number of transcoding session modules in the distribution list is 0, if it is 0 (indicating that no business terminal currently requests the video stream of the camera), Then tell the dispatch center to close the link with the camera, and at the same time the dispatch center will also inform the transcoding server to close the corresponding link.
  • the target camera After the target camera receives the session invitation sent by the dispatch center, if the target camera determines that it can send the data stream, it will return the status code of the target camera to the dispatch center.
  • a three-digit code such as a status code of 200, means normal, and a status code of 404, means the device is offline.
  • the main purpose of the status code returned by the target camera to the dispatch center is: 1. To inform the dispatch center whether the session invitation is reasonable and legal; 2. To inform the dispatch center whether the target camera can normally process the session invitation.
  • the dispatch center can obtain the target camera ID carried in the request information, and the dispatch center will cache the target camera ID so that when the status code is returned to the transcoding server later, the transcoding The server knows which transcoding session module corresponds to.
  • the transcoding server can create a key based on the target camera ID, and cache in the form of a key.
  • cache in the form of a key in the dispatching center.
  • both the transcoding server and the dispatch center will cache the request information, and at the same time cache the request information, they will also cache the target request ID and target camera ID contained therein.
  • the dispatch center receives the abnormal status code returned by the target camera (indicating that the session invitation failed), it will directly return the status code 404 to the transcoding server to notify the transcoding server that the request is over.
  • the transcoding server creates a first media transmission link between the target transcoding session module and each service terminal corresponding to each request information in the target request cache list, and creates the target transcoding session a second media transmission link between the module and the target media session module;
  • the transcoding server after the transcoding server receives the normal status code returned by the target camera, the transcoding server will actively register with the target media session module of the media server to create a link between the target transcoding session module and the target media session module.
  • the step of the transcoding server creating a first media transmission link between the target transcoding session module and each service terminal corresponding to each request information in the target request cache list include:
  • the transcoding server traverses the target request cache list, and creates a corresponding video transmission service for each request information in the target request cache list;
  • the transcoding server sends the address information of the video transmission service to each service terminal corresponding to each request information through the request identifier of each request information in the target request cache list, so that the Each service terminal sends access request information based on the address information;
  • the transcoding server creates a first media transmission link between the target transcoding session module and each service terminal based on the access request information.
  • the transcoding server will traverse the target request cache list of the transcoding session module, create a corresponding video transmission service for each request information in the target request cache list, and then send the The address of the video transmission service is passed to the service terminal corresponding to each request information through the request identifier (ws handle) in the target request cache list. After receiving the address, each service terminal actively accesses it to build the first media transmission link .
  • the transcoding server after receiving the status code returned by the target camera, traverses the target request cache list, and then sends the status code to the service terminal corresponding to each request information in the target request cache list.
  • the business terminal After receiving the status code, the business terminal knows the link transmission status of the current data stream. If the status code is 404, it means that the link transmission of the current data stream has failed to be established, and the business terminal knows that there is no need to continue to wait for the current data stream. If the status code is 200, it means that the link transmission of the current data stream is successfully established, and the business terminal can wait to obtain the current data stream, so that the perfect status notification is realized before the business terminal receives the data stream, which is convenient for the business terminal to understand the current data stream. The link transmission status of the data flow.
  • the media server sends the data stream received by the target media session module to the target transcoding session module based on the second media transmission link;
  • the camera sends the data stream to the target media session module, and after receiving the data stream, the target media session module sends the data stream to the transcoding module through the second media transmission link server.
  • the transcoding server distributes the data stream received by the target transcoding session module to each service terminal based on the first media transmission link.
  • the transcoding server after receiving the data stream sent by the media server, the transcoding server distributes the data stream to each service terminal through the first media transmission link.
  • the step of the transcoding server distributing the data stream received by the target transcoding session module to each service terminal based on the first media transmission link includes:
  • the transcoding server performs packet loss detection, rearrangement, packet assembly and encapsulation processing on the data stream to obtain media serialization packets;
  • the transcoding server distributes the media serialization package to each service terminal based on the first media transmission link.
  • the transcoding server After the transcoding server obtains the data stream, it performs packet loss detection, rearrangement, grouping, and encapsulation processing to obtain data packets, such as fmp4 media data packets.
  • data packets such as fmp4 media data packets.
  • the advantage of encapsulating the data stream into fmp4 media data packets is that h5 is perfect Support, no plug-in is required, only a device that supports h5, and a play button can realize the playback of the data stream, which is easy to use.
  • the fmp4 media data packet After obtaining the fmp4 media data packet, the fmp4 media data packet is transmitted to the service terminal through the first media transmission link, and the service terminal can use the MSR component to play the fmp4 media data packet.
  • the transcoding session module first create a transcoding session module, a scheduling session module, and a media session module corresponding to the camera, request the data stream of the camera based on the created modules, and use a modular media transmission link management method to ensure service Independence, with low coupling characteristics; then through the request cache list provided by the transcoding session module, it is used to cache all the request information for the camera data stream, so that only one request needs to be reserved to ensure the media link between the dispatch center and the camera The uniqueness; Finally, make full use of the distribution advantages brought by the high bandwidth of the media server to solve the problem of insufficient distribution capacity caused by the small network bandwidth of the camera. Therefore, the problem of network congestion in the data stream transmission of the camera can be effectively avoided.
  • Figure 7 is a schematic structural diagram of a media transmission link management device provided by the embodiment of the application , the media transmission link management device includes:
  • the transcoding server 701 is configured to receive the request information sent by the service terminal for requesting the data stream of the target camera; detect whether there is a transcoding session module corresponding to the target camera, and if not, send the request The information is sent to the dispatching center 702, and a target transcoding session module is created based on the target camera, and the request information is cached in the target request cache list of the target transcoding session module, and stored in the dispatching center 702 In the process of sending a session invitation to the target camera until the session is completed, cache all received request information for the data stream of the target camera into the target request cache list;
  • the scheduling center 702 is configured to create a target scheduling session module based on the target camera, send the session invitation to the target camera based on the target scheduling session module, and return the target camera based on the session invitation if receiving the target camera normal status code, send the normal status code to the transcoding server 701, and send a notification message to the target camera to notify the target camera to send the data stream, and send the request information To the media server 703, so that the media server 703 creates a target media session module based on the target camera to receive the data stream;
  • the transcoding server 701 is further configured to create a first media transmission link between the target transcoding session module and each service terminal corresponding to each request information in the target request cache list, and create the target A second media transmission link between the transcoding session module and the target media session module;
  • the media server 703 is configured to send the data stream received by the target media session module to the target transcoding session module based on the second media transmission link;
  • the transcoding server 701 is further configured to distribute the data stream received by the target transcoding session module to each service terminal based on the first media transmission link.
  • the transcoding session module first create a transcoding session module, a scheduling session module, and a media session module corresponding to the camera, request the data stream of the camera based on the created modules, and use a modular media transmission link management method to ensure service Independence, with low coupling characteristics; then through the request cache list provided by the transcoding session module, it is used to cache all the request information for the camera data stream, so that only one request needs to be reserved to ensure the media link between the dispatch center and the camera The uniqueness; Finally, make full use of the distribution advantages brought by the high bandwidth of the media server to solve the problem of insufficient distribution capacity caused by the small network bandwidth of the camera. Therefore, the problem of network congestion in the data stream transmission of the camera can be effectively avoided.
  • the transcoding server 701 is specifically configured to traverse the target request cache list, and create a corresponding video transmission service for each request information in the target request cache list ; sending the address information of the video transmission service to each service terminal corresponding to each request information through the request identifier of each request information in the target request cache list, so that each service terminal is based on Sending access request information based on the address information; establishing a first media transmission link between the target transcoding session module and each service terminal based on the access request information.
  • the transcoding server 701 is specifically configured to receive the text data sent by the service terminal based on the full-duplex communication protocol websocket, and the text data includes the target request identifier and the target camera An identifier, the target request identifier is used to identify a request corresponding to the text data, and the target camera identifier is used to identify the target camera.
  • the transcoding server 701 is specifically configured to convert the text data into binary data; and send the binary data to a dispatch center.
  • the transcoding server 701 is further configured to add the target transcoding session module to a transcoding session mapping table, and the transcoding session mapping table is used to represent The corresponding relationship between the camera ID and the transcoding session module; and/or, the scheduling center 702 is further configured to add the target scheduling session module to the scheduling session mapping table, and the scheduling session mapping table is used to represent the camera ID and Correspondence of scheduling session modules.
  • the transcoding server 701 is further configured to detect whether the data stream has been accessed if it is detected that there is a transcoding session module corresponding to the target camera , if the data stream has been accessed, create the first media transmission link, and send the address information of the first media transmission link to the service terminal.
  • the transcoding server 701 is further configured to cache the request information in the target request cache list.
  • the transcoding server 701 is specifically configured to send a registration packet to the registration monitoring service unit of the target media session module through the target transcoding session module to create A second media transmission link between the target transcoding session module and the data stream forwarding service unit of the target media session module.
  • the media server 703 is further configured to add the target transcoding session module to a distribution list; if the transcoding session module is received through the registration monitoring service unit The server 701 removes the target transcoding session module from the distribution list through the logout packet sent by the target transcoding session module.
  • the embodiments of the present application also provide a non-transitory computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it is implemented to perform the methods provided by the above-mentioned embodiments, for example, including:
  • the transcoding server receives the request information for requesting the data stream of the target camera sent by the service terminal; detects whether there is a transcoding session module corresponding to the target camera, and if not, sends the request information to the dispatcher center, and create a target transcoding session module based on the target camera, cache the request information into the target request cache list of the target transcoding session module, and send a session invitation to the target camera at the scheduling center until the completion During the session, all received request information for the data stream of the target camera is buffered into the target request cache list; the dispatch center creates a target scheduling session module based on the target camera, and based on the target The scheduling session module sends the session invitation to the target camera, and if a normal status
  • the disclosed device may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the modules is only a logical function division. In actual implementation, there may be other division methods.
  • multiple modules or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or modules may be in electrical, mechanical or other forms.
  • the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, that is, they may be located in one place, or may be distributed to multiple network modules. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional module in each embodiment of the embodiment of the present application may be integrated into one processing module, each module may exist separately physically, or two or more modules may be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. If the integrated modules are realized in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • all or part of them may be implemented by software, hardware, firmware or any combination thereof.
  • software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server, or data center Transmission to another website site, computer, server, or data center by wired (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.) means.
  • wired eg, coaxial cable, fiber optic, digital subscriber line (DSL)
  • wireless eg, infrared, wireless, microwave, etc.
  • the computer-readable storage medium may be any available medium that can be stored by a computer, or a data storage device such as a server or a data center integrated with one or more available media.
  • the available medium may be a magnetic medium (for example, a floppy disk, a hard disk, or a magnetic tape), an optical medium (for example, DVD), or a semiconductor medium (for example, a Solid State Disk (SSD)).

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Abstract

La présente demande divulgue un procédé et un appareil de gestion d'une liaison de transmission multimédia, et un support de stockage. Le procédé comprend les étapes suivantes : un serveur de transcodage reçoit des informations de demande envoyées par un terminal de service ; si le serveur de transcodage détermine que les informations de demande sont une première demande d'un flux de données d'une caméra cible, alors le serveur de transcodage, un serveur de planification et un serveur multimédia créent, sur la base de la caméra cible, un module de session de transcodage cible, un module de session de planification cible et un module de session multimédia respectivement ; et sur la base du module de session de transcodage cible, du module de session de planification cible et du module de session multimédia, le flux de données est distribué au terminal de service.
PCT/CN2021/119993 2021-05-20 2021-09-23 Procédé et appareil de gestion de liaison de transmission multimédia, et support de stockage WO2022241990A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117995332A (zh) * 2024-04-07 2024-05-07 北方健康医疗大数据科技有限公司 一种值域代码标准化转换系统及方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112995234B (zh) * 2021-05-20 2021-07-20 武汉中科通达高新技术股份有限公司 一种媒体传输链路管理方法及装置
CN114679433B (zh) * 2022-05-27 2022-08-30 武汉中科通达高新技术股份有限公司 视频访问会话管理系统、方法、计算机设备及存储介质
CN114679435B (zh) * 2022-05-27 2022-08-30 武汉中科通达高新技术股份有限公司 会话管理系统、方法、计算机设备及存储介质

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101079760A (zh) * 2007-07-27 2007-11-28 华为技术有限公司 实现网络监控的方法、系统及内容分发网络
US20120275444A1 (en) * 2011-04-28 2012-11-01 Salah Shahsavari Push-to-multimedia method and system for sharing multimedia information
US20130227060A1 (en) * 2011-01-14 2013-08-29 Research In Motion Limited Mobile media content delivery
CN104363472A (zh) * 2014-10-20 2015-02-18 中兴通讯股份有限公司 基于hls的能力控制方法及服务系统和slb服务器
CN112995234A (zh) * 2021-05-20 2021-06-18 武汉中科通达高新技术股份有限公司 一种媒体传输链路管理方法及装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6101547A (en) * 1998-07-14 2000-08-08 Panasonic Technologies, Inc. Inexpensive, scalable and open-architecture media server
US9063562B2 (en) * 2013-03-11 2015-06-23 Verizon Patent And Licensing Inc. Managing sessions between network cameras and user devices
CN104284239A (zh) * 2013-07-11 2015-01-14 中兴通讯股份有限公司 一种视频播放方法、装置、视频播放客户端和多媒体服务器
US11368753B2 (en) * 2016-01-06 2022-06-21 LiveView Technologies, LLC Managing live video stream connections and data usage
CN107734361A (zh) * 2017-09-30 2018-02-23 深圳融创新技术有限公司 流媒体服务器调度方法、系统、可读存储介质及服务器
CN110971975A (zh) * 2019-12-06 2020-04-07 杭州视洞科技有限公司 一种实时流媒体转发与直连切换的优化方案
CN111464816B (zh) * 2020-04-03 2020-11-17 广东利通科技投资有限公司 一种高速公路视频监控系统
CN112188227A (zh) * 2020-09-30 2021-01-05 武汉中科通达高新技术股份有限公司 一种流媒体数据分发方法和装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101079760A (zh) * 2007-07-27 2007-11-28 华为技术有限公司 实现网络监控的方法、系统及内容分发网络
US20130227060A1 (en) * 2011-01-14 2013-08-29 Research In Motion Limited Mobile media content delivery
US20120275444A1 (en) * 2011-04-28 2012-11-01 Salah Shahsavari Push-to-multimedia method and system for sharing multimedia information
CN104363472A (zh) * 2014-10-20 2015-02-18 中兴通讯股份有限公司 基于hls的能力控制方法及服务系统和slb服务器
CN112995234A (zh) * 2021-05-20 2021-06-18 武汉中科通达高新技术股份有限公司 一种媒体传输链路管理方法及装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117995332A (zh) * 2024-04-07 2024-05-07 北方健康医疗大数据科技有限公司 一种值域代码标准化转换系统及方法

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