CN110460811B - Multimedia data processing method and system based on video network - Google Patents
Multimedia data processing method and system based on video network Download PDFInfo
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- CN110460811B CN110460811B CN201910704645.6A CN201910704645A CN110460811B CN 110460811 B CN110460811 B CN 110460811B CN 201910704645 A CN201910704645 A CN 201910704645A CN 110460811 B CN110460811 B CN 110460811B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/643—Communication protocols
- H04N21/64322—IP
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
Abstract
The invention provides a multimedia data processing method and a system based on a video network, comprising a video network camera for acquiring initial data; according to the video networking protocol, the video networking camera encodes the initial data to obtain target data based on the video networking protocol, and sends the target data to a video networking server through a communication channel; and under the condition that the video network server receives the service request sent by the video network terminal, adding target data matched with the service request into a response aiming at the service request. In the invention, after the video network camera encodes the initial data according to the video network protocol, the video network camera can directly send the target data based on the video network protocol to the video network server, thereby saving the protocol conversion step of the data based on the IP protocol in the prior art, simplifying the whole video transmission process and reducing the picture delay and the equipment use cost.
Description
Technical Field
The invention relates to the technical field of video networking, in particular to a multimedia data processing method and system based on video networking.
Background
With the rapid development of network information technology, video information communication such as video conferences and video monitoring is widely applied to work, study and life. The video networking is an important milestone for network development, is a higher-level form of the internet, is a real-time network, and can realize the real-time transmission of full-network high-definition videos which cannot be realized by the internet at present.
The network camera belongs to an important component in the application of the video network, and at present, the main process that the network camera transmits the shot video information to the terminal in the video network is as follows: firstly, the network camera converts an optical image into an electric signal through a photoreceptor, the electric signal is converted into a digital image signal after analog-to-digital conversion, and the digital image signal is processed by a digital signal processing chip of the network camera to obtain video information coded based on an Interconnection Protocol (IP) between networks. Then, the network camera pushes the video information coded based on the IP to a streaming media server, and the streaming media server carries out protocol conversion processing on the video information coded based on the IP and recodes the video information into the video information based on the video networking protocol. And finally, the streaming media server sends the video information based on the video networking protocol to a related video networking terminal or server.
When the video network terminal or the server receives the video information, the video information must be subjected to protocol conversion, so that the problems of complex whole video transmission flow, high picture delay and high equipment use cost are caused.
Disclosure of Invention
In view of the above, embodiments of the present invention are proposed to provide a method and system for processing multimedia data based on a video network that overcome or at least partially solve the above problems.
In order to solve the above problem, an embodiment of the present invention discloses a multimedia data processing method based on a video network, the method is applied to a video network, the video network includes a video network server, a video network camera and a video network terminal, a communication path for transmitting data is established between the video network camera and the video network server, the method includes:
the video network camera acquires initial data;
according to a video networking protocol, the video networking camera encodes the initial data to obtain target data based on the video networking protocol, and sends the target data to the video networking server through the communication channel;
and under the condition that the video network server receives a service request sent by the video network terminal, adding target data matched with the service request into a response aiming at the service request.
In order to solve the above problem, an embodiment of the present invention further discloses a multimedia data processing system based on a video network, where the method is applied to a video network, the video network includes a video network server, a video network camera and a video network terminal, a communication path for transmitting data is established between the video network camera and the video network server, and the system includes:
the acquisition module is used for acquiring initial data by the video network camera;
the video network camera is used for coding the initial data according to a video network protocol to obtain target data based on the video network protocol, and sending the target data to the video network server through the communication channel;
and the adding module is used for adding target data matched with the service request to a response aiming at the service request under the condition that the video network server receives the service request sent by the video network terminal.
The embodiment of the invention has the following advantages:
the embodiment of the invention provides a multimedia data processing method and a system based on a video network, which comprises the following steps: the method comprises the steps that a video network camera acquires initial data; according to the video networking protocol, the video networking camera encodes the initial data to obtain target data based on the video networking protocol, and sends the target data to a video networking server through a communication channel; and under the condition that the video network server receives the service request sent by the video network terminal, adding target data matched with the service request into a response aiming at the service request. In the invention, after the video network camera encodes the initial data according to the video network protocol, the video network camera can directly send the target data based on the video network protocol to the video network server, thereby saving the protocol conversion step of the data based on the IP protocol in the prior art, simplifying the whole video transmission process and reducing the picture delay and the equipment use cost.
Drawings
FIG. 1 is a schematic networking diagram of a video network of the present invention;
FIG. 2 is a schematic diagram of a hardware architecture of a node server according to the present invention;
fig. 3 is a schematic diagram of a hardware structure of an access switch of the present invention;
fig. 4 is a schematic diagram of a hardware structure of an ethernet protocol conversion gateway according to the present invention;
FIG. 5 is a flowchart of the steps of one embodiment of the invention for video-networking based multimedia data processing;
FIG. 6 is a block diagram of a video network-based multimedia data processing system of the present invention;
FIG. 7 is a flowchart of the detailed steps of an embodiment of a method for processing multimedia data based on video networking according to the present invention;
fig. 8 is a block diagram of a video-networking based multimedia data processing system.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The video networking is an important milestone for network development, is a real-time network, can realize high-definition video real-time transmission, and pushes a plurality of internet applications to high-definition video, and high-definition faces each other.
The video networking adopts a real-time high-definition video exchange technology, can integrate required services such as dozens of services of video, voice, pictures, characters, communication, data and the like on a system platform on a network platform, such as high-definition video conference, video monitoring, intelligent monitoring analysis, emergency command, digital broadcast television, delayed television, network teaching, live broadcast, VOD on demand, television mail, Personal Video Recorder (PVR), intranet (self-office) channels, intelligent video broadcast control, information distribution and the like, and realizes high-definition quality video broadcast through a television or a computer.
To better understand the embodiments of the present invention, the following description refers to the internet of view:
some of the technologies applied in the video networking are as follows:
network Technology (Network Technology)
Network technology innovation in video networking has improved over traditional Ethernet (Ethernet) to face the potentially enormous video traffic on the network. Unlike pure network Packet Switching (Packet Switching) or network Circuit Switching (Circuit Switching), the Packet Switching is adopted by the technology of the video networking to meet the Streaming requirement. The video networking technology has the advantages of flexibility, simplicity and low price of packet switching, and simultaneously has the quality and safety guarantee of circuit switching, thereby realizing the seamless connection of the whole network switching type virtual circuit and the data format.
Switching Technology (Switching Technology)
The video network adopts two advantages of asynchronism and packet switching of the Ethernet, eliminates the defects of the Ethernet on the premise of full compatibility, has end-to-end seamless connection of the whole network, is directly communicated with a user terminal, and directly bears an IP data packet. The user data does not require any format conversion across the entire network. The video networking is a higher-level form of the Ethernet, is a real-time exchange platform, can realize the real-time transmission of the whole-network large-scale high-definition video which cannot be realized by the existing Internet, and pushes a plurality of network video applications to high-definition and unification.
Server Technology (Server Technology)
The server technology on the video networking and unified video platform is different from the traditional server, the streaming media transmission of the video networking and unified video platform is established on the basis of connection orientation, the data processing capacity of the video networking and unified video platform is independent of flow and communication time, and a single network layer can contain signaling and data transmission. For voice and video services, the complexity of video networking and unified video platform streaming media processing is much simpler than that of data processing, and the efficiency is greatly improved by more than one hundred times compared with that of a traditional server.
Storage Technology (Storage Technology)
The super-high speed storage technology of the unified video platform adopts the most advanced real-time operating system in order to adapt to the media content with super-large capacity and super-large flow, the program information in the server instruction is mapped to the specific hard disk space, the media content is not passed through the server any more, and is directly sent to the user terminal instantly, and the general waiting time of the user is less than 0.2 second. The optimized sector distribution greatly reduces the mechanical motion of the magnetic head track seeking of the hard disk, the resource consumption only accounts for 20% of that of the IP internet of the same grade, but concurrent flow which is 3 times larger than that of the traditional hard disk array is generated, and the comprehensive efficiency is improved by more than 10 times.
Network Security Technology (Network Security Technology)
The structural design of the video network completely eliminates the network security problem troubling the internet structurally by the modes of independent service permission control each time, complete isolation of equipment and user data and the like, generally does not need antivirus programs and firewalls, avoids the attack of hackers and viruses, and provides a structural carefree security network for users.
Service Innovation Technology (Service Innovation Technology)
The unified video platform integrates services and transmission, and is not only automatically connected once whether a single user, a private network user or a network aggregate. The user terminal, the set-top box or the PC are directly connected to the unified video platform to obtain various multimedia video services in various forms. The unified video platform adopts a menu type configuration table mode to replace the traditional complex application programming, can realize complex application by using very few codes, and realizes infinite new service innovation.
Networking of the video network is as follows:
the video network is a centralized control network structure, and the network can be a tree network, a star network, a ring network and the like, but on the basis of the centralized control node, the whole network is controlled by the centralized control node in the network.
As shown in fig. 1, the video network is divided into an access network and a metropolitan network.
The devices of the access network part can be mainly classified into 3 types: node server, access switch, terminal (including various set-top boxes, coding boards, memories, etc.). The node server is connected to an access switch, which may be connected to a plurality of terminals and may be connected to an ethernet network.
The node server is a node which plays a centralized control function in the access network and can control the access switch and the terminal. The node server can be directly connected with the access switch or directly connected with the terminal.
Similarly, devices of the metropolitan network portion may also be classified into 3 types: a metropolitan area server, a node switch and a node server. The metro server is connected to a node switch, which may be connected to a plurality of node servers.
The node server is a node server of the access network part, namely the node server belongs to both the access network part and the metropolitan area network part.
The metropolitan area server is a node which plays a centralized control function in the metropolitan area network and can control a node switch and a node server. The metropolitan area server can be directly connected with the node switch or directly connected with the node server.
Therefore, the whole video network is a network structure with layered centralized control, and the network controlled by the node server and the metropolitan area server can be in various structures such as tree, star and ring.
The access network part can form a unified video platform (the part in the dotted circle), and a plurality of unified video platforms can form a video network; each unified video platform may be interconnected via metropolitan area and wide area video networking.
Video networking device classification
1.1 devices in the video network of the embodiment of the present invention can be mainly classified into 3 types: servers, switches (including ethernet gateways), terminals (including various set-top boxes, code boards, memories, etc.). The video network as a whole can be divided into a metropolitan area network (or national network, global network, etc.) and an access network.
1.2 wherein the devices of the access network part can be mainly classified into 3 types: node servers, access switches (including ethernet gateways), terminals (including various set-top boxes, code boards, memories, etc.).
The specific hardware structure of each access network device is as follows:
a node server:
as shown in fig. 2, the system mainly includes a network interface module 201, a switching engine module 202, a CPU module 203, and a disk array module 204;
the network interface module 201, the CPU module 203, and the disk array module 204 all enter the switching engine module 202; the switching engine module 202 performs an operation of looking up the address table 205 on the incoming packet, thereby obtaining the direction information of the packet; and stores the packet in a queue of the corresponding packet buffer 206 based on the packet's steering information; if the queue of the packet buffer 206 is nearly full, it is discarded; the switching engine module 202 polls all packet buffer queues for forwarding if the following conditions are met: 1) the port send buffer is not full; 2) the queue packet counter is greater than zero. The disk array module 204 mainly implements control over the hard disk, including initialization, read-write, and other operations on the hard disk; the CPU module 203 is mainly responsible for protocol processing with an access switch and a terminal (not shown in the figure), configuring an address table 205 (including a downlink protocol packet address table, an uplink protocol packet address table, and a data packet address table), and configuring the disk array module 204.
The access switch:
as shown in fig. 3, the network interface module mainly includes a network interface module (a downlink network interface module 301 and an uplink network interface module 302), a switching engine module 303 and a CPU module 304;
wherein, the packet (uplink data) coming from the downlink network interface module 301 enters the packet detection module 305; the packet detection module 305 detects whether the Destination Address (DA), the Source Address (SA), the packet type, and the packet length of the packet meet the requirements, and if so, allocates a corresponding stream identifier (stream-id) and enters the switching engine module 303, otherwise, discards the stream identifier; the packet (downstream data) coming from the upstream network interface module 302 enters the switching engine module 303; the incoming data packet of the CPU module 304 enters the switching engine module 303; the switching engine module 303 performs an operation of looking up the address table 306 on the incoming packet, thereby obtaining the direction information of the packet; if the packet entering the switching engine module 303 is from the downstream network interface to the upstream network interface, the packet is stored in the queue of the corresponding packet buffer 307 in association with the stream-id; if the queue of the packet buffer 307 is nearly full, it is discarded; if the packet entering the switching engine module 303 is not from the downlink network interface to the uplink network interface, the data packet is stored in the queue of the corresponding packet buffer 307 according to the guiding information of the packet; if the queue of the packet buffer 307 is nearly full, it is discarded.
The switching engine module 303 polls all packet buffer queues, which in this embodiment of the present invention is divided into two cases:
if the queue is from the downlink network interface to the uplink network interface, the following conditions are met for forwarding: 1) the port send buffer is not full; 2) the queued packet counter is greater than zero; 3) obtaining a token generated by a code rate control module;
if the queue is not from the downlink network interface to the uplink network interface, the following conditions are met for forwarding: 1) the port send buffer is not full; 2) the queue packet counter is greater than zero.
The rate control module 308 is configured by the CPU module 304, and generates tokens for packet buffer queues from all downstream network interfaces to upstream network interfaces at programmable intervals to control the rate of upstream forwarding.
The CPU module 304 is mainly responsible for protocol processing with the node server, configuration of the address table 306, and configuration of the code rate control module 308.
Ethernet protocol conversion gateway：
As shown in fig. 4, the apparatus mainly includes a network interface module (a downlink network interface module 401 and an uplink network interface module 402), a switching engine module 403, a CPU module 404, a packet detection module 405, a rate control module 408, an address table 406, a packet buffer 407, a MAC adding module 409, and a MAC deleting module 410.
Wherein, the data packet coming from the downlink network interface module 401 enters the packet detection module 405; the packet detection module 405 detects whether the ethernet MAC DA, the ethernet MAC SA, the ethernet length or frame type, the video network destination address DA, the video network source address SA, the video network packet type, and the packet length of the packet meet the requirements, and if so, allocates a corresponding stream identifier (stream-id); then, the MAC deletion module 410 subtracts MAC DA, MAC SA, length or frame type (2byte) and enters the corresponding receiving buffer, otherwise, discards it;
the downlink network interface module 401 detects the sending buffer of the port, and if there is a packet, obtains the ethernet MAC DA of the corresponding terminal according to the destination address DA of the packet, adds the ethernet MAC DA of the terminal, the MAC SA of the ethernet protocol gateway, and the ethernet length or frame type, and sends the packet.
The other modules in the ethernet protocol gateway function similarly to the access switch.
A terminal:
the system mainly comprises a network interface module, a service processing module and a CPU module; for example, the set-top box mainly comprises a network interface module, a video and audio coding and decoding engine module and a CPU module; the coding board mainly comprises a network interface module, a video and audio coding engine module and a CPU module; the memory mainly comprises a network interface module, a CPU module and a disk array module.
1.3 devices of the metropolitan area network part can be mainly classified into 2 types: node server, node exchanger, metropolitan area server. The node switch mainly comprises a network interface module, a switching engine module and a CPU module; the metropolitan area server mainly comprises a network interface module, a switching engine module and a CPU module.
2. Video networking packet definition
2.1 Access network packet definition
The data packet of the access network mainly comprises the following parts: destination Address (DA), Source Address (SA), reserved bytes, payload (pdu), CRC.
As shown in the following table, the data packet of the access network mainly includes the following parts:
| DA | SA | Reserved | Payload | CRC |
wherein:
the Destination Address (DA) is composed of 8 bytes (byte), the first byte represents the type of the data packet (such as various protocol packets, multicast data packets, unicast data packets, etc.), there are 256 possibilities at most, the second byte to the sixth byte are metropolitan area network addresses, and the seventh byte and the eighth byte are access network addresses;
the Source Address (SA) is also composed of 8 bytes (byte), defined as the same as the Destination Address (DA);
the reserved byte consists of 2 bytes;
the payload part has different lengths according to different types of datagrams, and is 64 bytes if the datagram is various types of protocol packets, and is 32+1024 or 1056 bytes if the datagram is a unicast packet, of course, the length is not limited to the above 2 types;
the CRC consists of 4 bytes and is calculated in accordance with the standard ethernet CRC algorithm.
2.2 metropolitan area network packet definition
The topology of a metropolitan area network is a graph and there may be 2, or even more than 2, connections between two devices, i.e., there may be more than 2 connections between a node switch and a node server, a node switch and a node switch, and a node switch and a node server. However, the metro network address of the metro network device is unique, and in order to accurately describe the connection relationship between the metro network devices, parameters are introduced in the embodiment of the present invention: a label to uniquely describe a metropolitan area network device.
In this specification, the definition of the Label is similar to that of the Label of MPLS (Multi-Protocol Label Switch), and assuming that there are two connections between the device a and the device B, there are 2 labels for the packet from the device a to the device B, and 2 labels for the packet from the device B to the device a. The label is classified into an incoming label and an outgoing label, and assuming that the label (incoming label) of the packet entering the device a is 0x0000, the label (outgoing label) of the packet leaving the device a may become 0x 0001. The network access process of the metro network is a network access process under centralized control, that is, address allocation and label allocation of the metro network are both dominated by the metro server, and the node switch and the node server are both passively executed, which is different from label allocation of MPLS, and label allocation of MPLS is a result of mutual negotiation between the switch and the server.
As shown in the following table, the data packet of the metro network mainly includes the following parts:
| DA | SA | Reserved | label (R) | Payload | CRC |
Namely Destination Address (DA), Source Address (SA), Reserved byte (Reserved), tag, payload (pdu), CRC. The format of the tag may be defined by reference to the following: the tag is 32 bits with the upper 16 bits reserved and only the lower 16 bits used, and its position is between the reserved bytes and payload of the packet.
Based on the characteristics of the video network, one of the core concepts of the embodiment of the invention is provided, after the video network camera acquires the initial data, the video network camera encodes the initial data according to the video network protocol to obtain target data based on the video network protocol, and the target data is sent to the video network server through a communication channel; and under the condition that the video network server receives the service request sent by the video network terminal, adding target data matched with the service request into a response aiming at the service request. In the invention, after the video network camera encodes the initial data according to the video network protocol, the video network camera can directly send the target data based on the video network protocol to the video network server, thereby saving the protocol conversion step of the data based on the IP protocol in the prior art, simplifying the whole video transmission process and reducing the picture delay and the equipment use cost.
Referring to fig. 5, a flowchart illustrating steps of an embodiment of multimedia data processing based on the internet of view according to the present invention is shown, where the method may be applied to the internet of view, and specifically may include:
Referring to fig. 6, there is shown a block diagram of a multimedia data processing system based on an internet of view according to the present invention, which includes an internet of view camera 10, an internet of view server 20, and an internet of view terminal 30.
In the present invention, the video camera 10 may acquire data of a current environment, encode the acquired initial data according to a video protocol, obtain target data based on the video protocol, establish a communication path with the video server 20, and send the target data to the video server 20 through the communication path.
The video network server 20 may store communication parameters of the video network cameras, may establish a communication path with the video network cameras 10, and receive target data sent by the video network cameras 10 through the communication path, or may receive a service request sent by the video network terminal 30, and add target data matched with the service request to a response to the service request according to the service request.
The terminal 30 of the video network can send a service request to the video network server 20 and receive target data matched with the service request fed back by the video network server 20. The user can view or share the received target data through the video network terminal 30, and the user can also send the recording parameter of the target data to the video network server 20 through the video network terminal 30, so that the video network server 20 modifies the encoding parameter of the target data of the video network camera 10.
In the invention, after the video network camera encodes the initial data according to the video network protocol, the video network camera can directly send the target data based on the video network protocol to the video network server, thereby saving the protocol conversion step of the data based on the IP protocol in the prior art, simplifying the whole video transmission process and reducing the picture delay and the equipment use cost.
In the step, the video network camera can convert the optical image of the surrounding environment into an electric signal through the photoreceptor, the electric signal is converted into a digital image signal after analog-to-digital conversion, and the digital image signal is processed by a digital signal processing chip of the video network camera to obtain initial data aiming at the surrounding environment.
Specifically, the video network camera can process digital image signals according to different video coding formats, resolutions, frame rates and code rates, wherein the video coding format can be one of MJPEG (Motion Joint Photographic Experts Group), H264 and H265; the resolution may be one of 1920 × 1080, 1280 × 720, 640 × 480, and 320 × 288; the frame rate may be one of 15 frames per second, 24 frames per second, 25 frames per second, 30 frames per second, and 60 frames per second; the code rate may be one of 4 megabits, 2 megabits, 0.5 megabits, and 0.2 megabits.
In actual life, most network devices are built in an IP protocol, and data sent by the network devices are also data based on the IP protocol, but for other terminals or servers with built-in private protocols, data based on the IP protocol cannot be directly analyzed and obtained. Therefore, in order to receive data based on the IP protocol, a server for protocol conversion must be added in the data transmission link, and the protocol conversion server parses the data based on the IP protocol according to the IP protocol, and then encodes the parsed data according to the private protocol again to obtain the data based on the private protocol. The protocol conversion server sends the data based on the private protocol to a target terminal with a built-in private protocol, and the target terminal can analyze and acquire the data.
In this step, the video networking camera may encode the initial data in accordance with the video networking protocol, since the video networking protocol is built in the video networking camera.
Specifically, after the video network camera acquires the initial data, the video network camera can start a camera coding acquisition process, and code the initial data according to the video network protocol to obtain target data based on the video network protocol. The video network camera can directly send target data based on the video network protocol to the video network server through a communication channel established between the video network camera and the video network server.
In the embodiment of the invention, after the video networking camera acquires the initial data, the initial data can be coded according to the video networking protocol to obtain the target data based on the video networking protocol. Because the video network server is also internally provided with a video network protocol, the target data can be directly sent to the video network server by the video network camera without protocol conversion processing in the transmission process, and the video network server analyzes and acquires the target data.
In this step, the user may select a desired service type through a client interface of the video network terminal, and view a picture recorded by any video network camera accessing the video network server, where the service type may include: the method comprises the steps of live broadcasting the pictures recorded by the current video network camera and playing back the pictures recorded by the video network camera within a certain period of time. The terminal of the video network can generate a service request according to the selection of the user, wherein the service request can include: the terminal number of the video network camera to be checked and the recording time of the target data to be checked. The video network terminal can send the generated service request coded based on the video network protocol to the video network server, and the video network server adds the target data to the response of the service request according to the end number of the video network camera in the service request and the recording time of the corresponding target data and sends the target data to the video network terminal.
In summary, an embodiment of the present invention provides a method for processing multimedia data based on a video network, including: the method comprises the steps that a video network camera acquires initial data; according to the video networking protocol, the video networking camera encodes the initial data to obtain target data based on the video networking protocol, and sends the target data to a video networking server through a communication channel; and under the condition that the video network server receives the service request sent by the video network terminal, adding target data matched with the service request into a response aiming at the service request. In the invention, after the video network camera encodes the initial data according to the video network protocol, the video network camera can directly send the target data based on the video network protocol to the video network server, thereby saving the protocol conversion step of the data based on the IP protocol in the prior art, simplifying the whole video transmission process and reducing the picture delay and the equipment use cost.
Referring to fig. 7, a flowchart illustrating specific steps of an embodiment of a method for processing multimedia data based on a video network according to the present invention is shown, wherein the method includes:
step 601, under the condition that the video camera is started, the video camera generates a network access instruction. Wherein the network access instruction comprises communication parameters of the video network camera.
In this step, when the video camera is powered on and the network is connected, the video camera may receive a network access detection instruction based on the video protocol, which is sent by the video server at regular time. The network access detection instruction contains an interface address of the video network server, and the video network server can scan newly accessed video network equipment by sending the network access detection instruction. After receiving a network access detection instruction sent by a network access server, the video network camera starts a network access process service and generates a network access instruction based on a video network protocol, wherein the network access instruction based on the video network protocol comprises communication parameters of the video network camera.
In this step, the video networking camera may determine an interface address of the video networking server according to the received networking detection instruction based on the video networking protocol, and send a networking instruction based on the video networking protocol to the video networking server according to the interface address.
In this step, the internet of view server may receive and obtain, through the internet of view protocol-based access instruction sent by the internet of view camera in the internet of view protocol parsing step 602, the communication parameter included in the access instruction, and perform a verification operation on the access instruction according to the communication parameter. And if the verification operation is passed, the video network server establishes a communication channel with the video network camera.
Further, in the case that a communication path for transmitting the target data is successfully established between the video network camera and the video network server, the video network server may also periodically send a heartbeat request based on the video network protocol to the video network camera, where the heartbeat request includes a device status query instruction. When the video camera receives a heartbeat request containing a device status query instruction, the video camera can send a heartbeat receipt based on the video protocol according to the current status mode, wherein the heartbeat receipt includes device status information.
In the embodiment of the invention, the communication path is established by using the network access verification mode, so that the video network camera can establish the communication path with the video network server only when the communication parameters of the video network camera exist in the network access list of the video network server, the video network server is prevented from being accessed by unknown equipment, target data is prevented from being transmitted or unknown equipment is prevented from being transmitted by the video network camera, and the safety of the whole data transmission process and the video network is improved.
Optionally, a network access list is stored in the video network server, where the network access list includes communication parameters of at least one video network camera; step 603 may specifically include:
substep 6031, in case that the network access list includes the communication parameter included in the network access instruction, the network access server confirms that the verification operation is passed.
In this step, the video network server stores a network access list, wherein the network access list comprises communication parameters of at least one video network camera. The video network server may query whether the communication parameter in the network access instruction is configured in the network access list, and if the communication parameter exists in the network access verification, the video network server confirms that the verification operation is passed.
Sub-step 6032, in the event that the verification operation passes, the internet of view server establishes a communication pathway with the internet of view camera.
In the step, in the case that the verification operation passes, the video network server configures the communication parameters to the communication channel process service of the video network server, and generates a confirmed network access instruction based on the video network protocol. After the network access confirmation instruction is generated by the video network server, the video network server can send the network access confirmation instruction to the video network camera, the network access confirmation instruction is used for informing the video network camera that the communication channel is established, and the video network server can receive target data. And under the condition that the video network camera receives the network access confirmation instruction, the video network camera generates a receipt instruction based on a video network protocol according to the network access confirmation instruction and sends the receipt instruction to the video network server. At this time, a communication path between the video network server and the video network camera is successfully established.
Step 604, in the case that the communication path is established between the video camera and the video server, the video camera generates a streaming request and sends the streaming request to the video server.
In this step, in the case that the communication path is established between the video camera and the video server, the video camera may generate a streaming request according to the video protocol, and send the streaming request to the video server.
In this step, after receiving the stream pushing request in step 604, the video network server generates a stream pushing confirmation instruction for the stream pushing request according to the video network protocol, and sends the stream pushing confirmation instruction to the video network camera, where the stream pushing confirmation instruction may include a parameter for setting target data. The parameters may include a video encoding format, a resolution, a frame rate, and a code rate, wherein the video encoding format may be one of MJPEG, H264, and H265; the resolution may be one of 1920 × 1080, 1208 × 720, 640 × 480, and 320 × 288; the frame rate may be one of 15 frames per second, 24 frames per second, 25 frames per second, 30 frames per second, and 60 frames per second; the code rate may be one of 4 megabits, 2 megabits, 0.5 megabits, and 0.2 megabits.
In this step, specifically, in the internet of view, the server of the internet of view may generate the push flow acknowledgement command that may be transmitted in the internet of view through the 8785 protocol, the specification of which 8785 protocol may be as described in table 1 below:
TABLE 1
8785 the protocol can be a push flow confirmation command of the video network server, which is a short message instruction with length of 32W sent by the server, and the video network server commands the video network camera to make some specified operations.
In the embodiment of the present invention, the "dev _ type" in the video networking camera push flow confirmation instruction may be written into the video networking camera, the "dev _ no" in the video networking camera push flow confirmation instruction may be written into the video networking camera, and the "opt _ para" in the video networking camera push flow confirmation instruction may be written into the operation that needs to be performed on the video networking camera, that is, the operation code, for example, instructs the video networking camera to record the initial data with the video coding format of H264, the resolution of 1920 × 1080, the frame rate of 60 frames per second, and the code rate of 4 megabytes.
Preferably, the parameter may be set according to a preset requirement of the video networking server or a service request sent by the video networking terminal.
In this step, after the video network camera receives and analyzes the stream pushing confirmation instruction based on the video network protocol, the video network camera may create a collection thread and start recording pictures of the surrounding environment according to the parameters of the target data. The video network camera can establish an encoding thread while establishing the acquisition thread according to the plug flow confirmation instruction. After the video network camera creates the encoding thread, the encoder is opened and configured according to the received target data parameters, and the recorded environment picture is encoded into initial data corresponding to the stream pushing confirmation instruction.
In a specific implementation, the video network camera may acquire the initial data by:
and a substep 6061 of reading an operation code for recording the initial data from the received data packet when the data characterizing the push flow confirmation instruction is read from the data packet.
Sub-step 6062, mapping the operation code of the recording initial data to the specified parameter of the recording initial data.
And a substep 6063, wherein the parameters of the recorded initial data drive the video network camera to record according to the parameters of the recorded initial data.
In the video network, if the video network camera receives a data packet, the 0 th field number may be read from a protocol packet of the data packet, and if the 0 th field number is "8785", the protocol packet is characterized as a stream pushing confirmation instruction, and an operation code for recording initial data may be read from the 3 rd to 30 th field numbers.
Specifically, in a video network, a video network server may encode initial data according to an elementary stream video data protocol, the specification of which may be as described in table 2 below:
TABLE 2
In the embodiment of the invention, after the video networking camera acquires the initial data, the initial data can be coded according to the video networking protocol to obtain the target data based on the video networking protocol. Because the video network server is also internally provided with a video network protocol, the target data can be directly sent to the video network server by the video network camera without protocol conversion processing in the transmission process, and the video network server analyzes and acquires the target data.
The step may refer to the above step, which is not described in detail in the embodiment of the present invention.
In summary, an embodiment of the present invention provides a method for processing multimedia data based on a video network, including: the method comprises the steps that a video network camera acquires initial data; according to the video networking protocol, the video networking camera encodes the initial data to obtain target data based on the video networking protocol, and sends the target data to a video networking server through a communication channel; and under the condition that the video network server receives the service request sent by the video network terminal, adding target data matched with the service request into a response aiming at the service request. In the invention, after the video network camera encodes the initial data according to the video network protocol, the video network camera can directly send the target data based on the video network protocol to the video network server, thereby saving the protocol conversion step of the data based on the IP protocol in the prior art, simplifying the whole video transmission process and reducing the picture delay and the equipment use cost.
Referring to fig. 8, a block diagram of a multimedia data processing system based on video network according to the present invention is shown, which may specifically include:
an obtaining module 701, configured to obtain initial data by the video camera;
the encoding module 702 is configured to encode the initial data according to a video networking protocol to obtain target data based on the video networking protocol, and send the target data to the video networking server through the communication path;
an adding module 703, configured to add, when the video network server receives a service request sent by the video network terminal, target data matched with the service request to a response to the service request.
Preferably, the system further comprises:
the first generation module is used for generating a network access instruction by the video camera under the condition that the video camera is started; wherein the network access instruction comprises communication parameters of the video network camera;
the sending module is used for sending the network access instruction to the video network server by the video network camera;
and the verification module is used for performing verification operation on the communication parameters included by the network access instruction by the video network server and establishing the communication channel with the video network camera under the condition that the verification operation is passed.
Preferably, the verification module includes:
the verification submodule is used for confirming that the verification operation is passed by the video network server under the condition that the network access list contains the communication parameters included in the network access instruction;
the establishing sub-module is used for establishing the communication channel between the video network server and the video network camera under the condition that the verification operation is passed.
Preferably, the system further comprises:
the second generation module is used for generating a stream pushing request by the video camera under the condition that the communication channel is established between the video camera and the video server, and sending the stream pushing request to the video server;
and the third generation module is used for generating a push flow confirmation instruction aiming at the push flow request by the video network server under the condition that the confirmation operation aiming at the push flow request is received, and sending the push flow confirmation instruction to the video network camera so that the video network camera executes the operation of acquiring the initial data according to the push flow confirmation instruction.
To sum up, an embodiment of the present invention provides a multimedia data processing system based on a video network, including: the method comprises the steps that a video network camera acquires initial data; according to the video networking protocol, the video networking camera encodes the initial data to obtain target data based on the video networking protocol, and sends the target data to a video networking server through a communication channel; and under the condition that the video network server receives the service request sent by the video network terminal, adding target data matched with the service request into a response aiming at the service request. In the invention, after the video network camera encodes the initial data according to the video network protocol, the video network camera can directly send the target data based on the video network protocol to the video network server, thereby saving the protocol conversion step of the data based on the IP protocol in the prior art, simplifying the whole video transmission process and reducing the picture delay and the equipment use cost.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The foregoing describes in detail a multimedia data processing method and system based on video networking, and the principle and implementation of the present invention are explained by applying specific examples, and the description of the foregoing examples is only used to help understanding the method and core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (8)
1. A multimedia data processing method based on video network is characterized in that the method is applied to the video network, the video network comprises a video network server, a video network camera and a video network terminal, a communication channel for transmitting data is established between the video network camera and the video network server, the video network camera is internally provided with a video network protocol, and the method comprises the following steps:
under the condition that the communication channel is established between the video network camera and the video network server, the video network camera generates a flow pushing request and sends the flow pushing request to the video network server;
the video network server generates a push flow confirmation instruction aiming at the push flow request under the condition that the confirmation operation aiming at the push flow request is received, and sends the push flow confirmation instruction to the video network camera, so that the video network camera executes the operation of acquiring initial data according to the push flow confirmation instruction;
the video network camera acquires the initial data;
according to a video networking protocol, the video networking camera encodes the initial data to obtain target data based on the video networking protocol, and sends the target data to the video networking server through the communication channel, wherein the target data is not subjected to protocol conversion processing in the transmission process;
under the condition that the video network server receives a service request sent by the video network terminal, adding target data matched with the service request into a response aiming at the service request so that a user can select a required service type and view a picture recorded by any video network camera accessed into the video network server, wherein the service type comprises: the method comprises the steps of live broadcasting the pictures recorded by the current video network camera and playing back the pictures recorded by the video network camera within a certain period of time.
2. The method of claim 1, further comprising, prior to the step of the video networking camera acquiring initial data:
under the condition that the video network camera is started, the video network camera generates a network access instruction; wherein the network access instruction comprises communication parameters of the video network camera;
the video network camera sends the network access instruction to the video network server;
and the video network server carries out verification operation on communication parameters included by the network access instruction, and establishes the communication channel with the video network camera under the condition that the verification operation is passed.
3. The method of claim 2, wherein the video networking server has a network entry list stored therein, the network entry list comprising communication parameters of at least one video networking camera;
the step that the video network server carries out verification operation on communication parameters included in the network access instruction, and establishes the communication channel with the video network camera under the condition that the verification operation is passed, comprises the following steps:
under the condition that the network access list contains the communication parameters included by the network access instruction, the video network server confirms that the verification operation is passed;
in the event that the authentication operation passes, the video network server establishes the communication path with the video network camera.
4. The method of claim 1, wherein the encoding format of the initial data comprises an h.264 format.
5. A multimedia data processing system based on video network, wherein the system is applied in video network, the video network includes a video network server, a video network camera and a video network terminal, a communication channel for transmitting data is established between the video network camera and the video network server, the video network camera is provided with a video network protocol inside, the system includes:
the second generation module is used for generating a stream pushing request by the video camera under the condition that the communication channel is established between the video camera and the video server, and sending the stream pushing request to the video server;
the third generation module is used for generating a push flow confirmation instruction aiming at the push flow request by the video network server under the condition that the confirmation operation aiming at the push flow request is received, and sending the push flow confirmation instruction to the video network camera so that the video network camera executes the operation of acquiring initial data according to the push flow confirmation instruction;
the acquisition module is used for acquiring the initial data by the video network camera;
the video network camera is used for coding the initial data according to a video network protocol to obtain target data based on the video network protocol, and sending the target data to the video network server through the communication channel, wherein the target data is not subjected to protocol conversion processing in the transmission process;
an adding module, configured to add, when the video network server receives a service request sent by the video network terminal, target data matched with the service request to a response to the service request, so that a user selects a required service type, and views a picture recorded by any video network camera accessing the video network server, where the service type includes: the method comprises the steps of live broadcasting the pictures recorded by the current video network camera and playing back the pictures recorded by the video network camera within a certain period of time.
6. The system of claim 5, further comprising:
the first generation module is used for generating a network access instruction by the video camera under the condition that the video camera is started; wherein the network access instruction comprises communication parameters of the video network camera;
the sending module is used for sending the network access instruction to the video network server by the video network camera;
and the verification module is used for performing verification operation on the communication parameters included by the network access instruction by the video network server and establishing the communication channel with the video network camera under the condition that the verification operation is passed.
7. The system of claim 6, wherein the video network server has a network entry list stored therein, the network entry list comprising communication parameters of at least one video network camera;
the authentication module includes:
the verification submodule is used for confirming that the verification operation is passed by the video network server under the condition that the network access list contains the communication parameters included in the network access instruction;
the establishing sub-module is used for establishing the communication channel between the video network server and the video network camera under the condition that the verification operation is passed.
8. The system of claim 5, wherein the encoding format of the initial data comprises an H.264 format.
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