CN110086773B - Audio and video data processing method and system - Google Patents
Audio and video data processing method and system Download PDFInfo
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- CN110086773B CN110086773B CN201910209631.7A CN201910209631A CN110086773B CN 110086773 B CN110086773 B CN 110086773B CN 201910209631 A CN201910209631 A CN 201910209631A CN 110086773 B CN110086773 B CN 110086773B
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- 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
- H04L65/60—Network streaming of media packets
- H04L65/65—Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
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- 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
- H04L69/06—Notations for structuring of protocol data, e.g. abstract syntax notation one [ASN.1]
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- H—ELECTRICITY
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- 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
- H04L69/08—Protocols for interworking; Protocol conversion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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Abstract
The embodiment of the invention provides a method and a system for processing audio and video data, wherein the method comprises the following steps: the protocol conversion server receives the request signaling, and analyzes the request signaling to obtain the identification information of the network video recorder and the identification information of the target audio and video data; the protocol conversion server packages identification information of the network video recorder and identification information of target audio and video data into a request data packet supporting RTSP, adds an internet packet header to the request data packet, sends the request data packet added with the internet packet header to the network video recorder according to the identification information of the network video recorder, receives returned target audio and video data, sends the target audio and video data to a video network node server, the video network node server forwards the target audio and video data to a video network terminal, and the video network terminal displays the target audio and video data. The embodiment of the invention reduces the workload of deploying the network and acquiring the audio and video data.
Description
Technical Field
The invention relates to the technical field of video networking, in particular to a method and a system for processing audio and video data.
Background
The video network is a special network for transmitting high-definition video and a special protocol at high speed based on Ethernet hardware, is a higher-level form of the Internet and is a real-time network.
At present, a large number of cameras are still deployed in the internet, and if a video network terminal in the video network needs to acquire an audio/video code stream in the camera, the camera in the internet needs to be accessed into the video network. Since the communication protocol of the internet is different from that of the video network, complicated operations are required to access a large number of cameras to the video network, and the workload is enormous.
Disclosure of Invention
In view of the above problems, embodiments of the present invention are proposed to provide a processing method of audio-video data and a corresponding processing system of audio-video data, which overcome or at least partially solve the above problems.
In order to solve the above problem, an embodiment of the present invention discloses a method for processing audio/video data, where the method is applied to a video network, and the video network includes: the system comprises a protocol conversion server, a video network node server and a video network terminal, wherein the video network node server is respectively communicated with the protocol conversion server and the video network terminal, the video network is connected with the Internet, the Internet comprises a network video recorder and cameras which are connected with each other, audio and video data of each camera are stored in the network video recorder, the protocol conversion server is connected with the network video recorder, and the method comprises the following steps: the protocol conversion server receives a request signaling from the video network node server, and the video network node server is used for receiving a request message from the video network terminal and generating the request signaling according to the request message; the protocol conversion server analyzes the request signaling to obtain the identification information of the network video recorder and the identification information of the target audio and video data; the protocol conversion server packages the identification information of the network video recorder and the identification information of the target audio and video data into a request data packet supporting a real-time streaming protocol (RTSP), and adds an internet packet header to the request data packet; the protocol conversion server sends the request data packet added with the internet packet header to the network video recorder according to the identification information of the network video recorder, and receives the target audio and video data returned by the network video recorder according to the request data packet; the protocol conversion server sends the target audio and video data to the video network node server, the video network node server is used for forwarding the target audio and video data to the video network terminal, and the video network terminal is used for displaying the target audio and video data.
Optionally, after the step of sending, by the protocol conversion server, the request packet added with the internet packet header to the network hard disk video recorder according to the identification information of the network hard disk video recorder, the method further includes: the protocol conversion server receives a reply data packet from the network hard disk video recorder; the protocol conversion server extracts reply information from the reply data packet and adds a video network packet header to the reply information; the protocol conversion server sends the reply information added with the video network packet header to the video network node server, and the video network node server is used for analyzing the reply information added with the video network packet header to obtain the reply information and sending the reply information to the video network terminal.
Optionally, the video network terminal is configured to start a preset audio/video decoder according to the reply information, and play the target audio/video data by using the audio/video decoder.
Optionally, when the protocol conversion server parses the request signaling, the method further includes: and the protocol conversion server analyzes the request signaling to obtain the time information of the target audio and video data.
Optionally, the method further comprises: and the protocol conversion server packages the identification information of the network video recorder, the identification information of the target audio and video data and the time information into a request data packet supporting the RTSP.
The embodiment of the invention also discloses a processing system of audio and video data, which is applied to the video network, wherein the video network comprises: protocol conversion server, video networking node server and video networking terminal, video networking node server respectively with protocol conversion server with the communication of video networking terminal, the video networking is connected with the internet, the internet includes interconnect's network hard disk video recorder and camera, the last storage of network hard disk video recorder has each the audio and video data of camera, protocol conversion server with network hard disk video recorder connects, protocol conversion server includes: the receiving module is used for receiving a request signaling from the video network node server, and the video network node server is used for receiving a request message from the video network terminal and generating the request signaling according to the request message; the analysis module is used for analyzing the request signaling to obtain the identification information of the network video recorder and the identification information of the target audio and video data; the packaging module is used for packaging the identification information of the network video recorder and the identification information of the target audio and video data into a request data packet supporting a real-time streaming protocol (RTSP), and adding an internet packet header to the request data packet; the sending module is used for sending the request data packet added with the internet packet header to the network video recorder according to the identification information of the network video recorder and receiving the target audio and video data returned by the network video recorder according to the request data packet; the sending module is further used for sending the target audio and video data to the video network node server, the video network node server is used for forwarding the target audio and video data to the video network terminal, and the video network terminal is used for displaying the target audio and video data.
Optionally, the receiving module is further configured to receive a reply data packet from the network hard disk video recorder after the sending module sends the request data packet added with the internet packet header to the network hard disk video recorder according to the identification information of the network hard disk video recorder; the protocol conversion server further includes: the extraction module is used for extracting reply information from the reply data packet and adding a video network packet header to the reply information; the sending module is further used for sending the reply information added with the video network packet header to the video network node server, the video network node server is used for analyzing the reply information added with the video network packet header to obtain the reply information, and sending the reply information to the video network terminal.
Optionally, the video network terminal is configured to start a preset audio/video decoder according to the reply information, and play the target audio/video data by using the audio/video decoder.
Optionally, the analysis module is further configured to analyze the request signaling to obtain time information of the target audio/video data.
Optionally, the encapsulating module is further configured to encapsulate the identification information of the network hard disk recorder, the identification information of the target audio/video data, and the time information into a request packet supporting the RTSP.
The embodiment of the invention has the following advantages:
the embodiment of the invention is applied to the video network, the video network can comprise a protocol conversion server, a video network node server and a video network terminal, wherein the video network node server can be respectively communicated with the protocol conversion server and the video network terminal. Moreover, the video network can be connected with the internet, the internet can comprise the network video recorder and the cameras, the audio and video data of the cameras are stored on the network video recorder, and the protocol conversion server can be connected with the network video recorder.
In the embodiment of the invention, in the video network, a video network terminal sends a request message for acquiring target audio and video data on a network video recorder to a video network node server, wherein the request message can contain identification information of the network video recorder in the internet and identification information of the target audio and video data in the network video recorder. And the video network node server receives the request message, generates a request signaling according to the request message and transmits the request signaling to the protocol conversion server. The Protocol conversion server analyzes the request signaling to obtain identification information of the network hard disk video recorder and identification information of the target audio and video data, the identification information of the network hard disk video recorder and the identification information of the target audio and video data are packaged into a request data packet supporting a Real Time Streaming Protocol (RTSP), and an internet packet header is added to the request data packet so that the request data packet added with the internet packet header can be sent to the network hard disk video recorder in the internet through the internet. And the network video recorder receives the request data packet, determines target audio and video data according to the request data packet, and sends the target audio and video data to a protocol conversion server in the video network through the Internet. The protocol conversion server sends the target audio and video data to the video network terminal through the video network node server, and the video network terminal can display the received target audio and video data.
The embodiment of the invention applies the characteristics of the video network, and the protocol conversion server is deployed in the video network, can receive data in the video network, convert the data into data supporting an internet protocol, and send the data to the network video recorder in the internet. The protocol conversion server can also receive data of a network hard disk video recorder in the Internet, convert the data into data supporting a video networking protocol, and send the data to a video networking node server and a video networking terminal in the video networking. The protocol conversion server in the embodiment of the invention can acquire the target audio and video data from the network hard disk video recorder in the Internet and send the target audio and video data to the video network terminal in the video network so as to display the target audio and video data on the video network terminal. The embodiment of the invention avoids acquiring target audio and video data from a large number of cameras in the Internet, can acquire the target audio and video data from each camera only from the network video recorder in the Internet, does not need to access a large number of cameras into the video network, and reduces the workload of deploying the network and acquiring the audio and video data.
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 illustrating steps of an embodiment of a method for processing audio/video data according to the present invention;
fig. 6 is a schematic diagram of the design of a live broadcast method of audio and video data according to the present invention;
fig. 7 is an operational flow diagram of a method of live broadcasting of audio and video data in accordance with the present invention;
fig. 8 is a block diagram of a protocol conversion server in an embodiment of an audio/video data processing system according to the present invention.
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 internet of vision technology employs network Packet Switching to satisfy the demand of Streaming (translated into Streaming, and continuous broadcasting, which is a data transmission technology, converting received data into a stable and continuous stream, and continuously transmitting the stream, so that the sound heard by the user or the image seen by the user is very smooth, and the user can start browsing on the screen before the whole data is transmitted). 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 (circled part), 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 (downstream network interface module 301, upstream network interface module 302), the switching engine module 303, and the CPU module 304 are mainly included.
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, 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 data packet coming from the CPU module 204 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) and obtaining the token generated by the 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 208 is configured by the CPU module 204, 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 video networking destination address DA of the packet, adds the ethernet MAC DA of the terminal, the MAC SA of the ethernet coordination 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 3 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 |
the Destination Address (DA) is composed of 8 bytes (byte), the first byte represents the type of the data packet (e.g. various protocol packets, multicast data packets, unicast data packets, etc.), there are at most 256 possibilities, 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 types of different datagrams, and is 64 bytes if the type of the datagram is a variety of protocol packets, or is 1056 bytes if the type of the datagram is a unicast packet, but 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 a Label of Multi-Protocol Label switching (MPLS), and assuming that there are two connections between a device a and a device B, there are 2 labels for a packet from the device a to the device B, and 2 labels for a 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, following the protocol of the video network, the protocol conversion server in the video network can forward the request signaling of the video network terminal for acquiring the target audio and video data to the network video recorder in the internet after relevant processing. The protocol conversion server in the video network can also receive target audio and video data from a network hard disk video recorder in the internet, perform relevant processing on the target audio and video data, and forward the target audio and video data to a video network terminal in the video network so as to display the target audio and video data on the video network terminal.
Referring to fig. 5, a flowchart illustrating steps of an embodiment of a method for processing audio/video data according to the present invention is shown, where the method may be applied to a video network, and the video network may include a protocol conversion server, a video network node server, and a video network terminal, where the video network node server may communicate with the protocol conversion server and the video network terminal, respectively, and the video network may be connected to the internet, and the internet may include a network hard disk video recorder and cameras connected to each other, where audio/video data of each camera is stored in the network hard disk video recorder, and the protocol conversion server may be connected to the network hard disk video recorder. The method specifically comprises the following steps:
in step 501, a protocol conversion server receives a request signaling from a node server of a video network.
In the embodiment of the invention, the video network node server receives the request message from the video network terminal and generates the request signaling according to the request message. When the video network terminal sends a request message to the video network node server, the request message carries the identification information of the network video recorder in the internet and the identification information of the target audio and video data in the network video recorder. In practical application, the identification information of the network hard disk recorder can be a virtual number registered in the internet by the network hard disk recorder, and the virtual number has uniqueness in the internet. That is, in the internet, a corresponding network hard disk recorder can be uniquely determined based on a virtual number. The identification information of the target audio and video data can be a number, and the number has uniqueness in the network hard disk video recorder. That is, in a network hard disk video recorder, a target audio and video data can be uniquely determined according to a number.
In a preferred embodiment of the present invention, the request message may further carry time information of the target audio/video data, where the time information may include a date, an hour, a minute, a second, and the like. The purpose of carrying the time information in the request message by the video network terminal is to acquire target audio and video data in a specific time period from the network video recorder.
It should be noted that the video network terminal may obtain the identification information of each network hard disk video recorder, the identification information of each audio/video data in each network hard disk video recorder, and the like in advance. In practical application, the identification information of each network hard disk video recorder and the identification information of each audio/video data in each network hard disk video recorder can be stored in a specified position in the video network node server in advance, and the video network terminal can access the identification information of each network hard disk video recorder and the identification information of each audio/video data in each network hard disk video recorder at the specified position.
In a preferred embodiment of the present invention, the terminal of the video network may transmit the request message to the node server of the video network in the form of a data packet. After receiving the data packet from the video network terminal, the video network node server may analyze the data packet, and if the identification information of the network hard disk video recorder is obtained through analysis, may generate a request signaling according to the analysis result. Wherein, the analysis result includes but is not limited to: identification information of the network hard disk video recorder, identification information of target audio and video data and the like. And the video network node server transmits the generated request signaling to the protocol conversion server in the video network.
When the protocol conversion server analyzes the request signaling, the protocol conversion server can analyze the identification information of the network video recorder and the identification information of the target audio and video data and can also analyze the time information of the target audio and video data. The time information may be time period information of target audio and video data to be acquired by the video networking terminal, and the time information is not necessarily a complete time period of the target audio and video data.
In the embodiment of the invention, the analysis result can comprise identification information of the network video recorder and identification information of the target audio and video data, and the analysis result can also comprise time information of the target audio and video data. RTSP belongs to application-level protocols and can control the transmission of real-time data. RTSP provides an extensible framework that enables controlled on-demand of real-time data, such as audio-visual data. When the protocol conversion server encapsulates the parsing result into a request packet supporting RTSP, the parsing result may be used as a data load portion of the request packet according to a preset sequence, for example, the identification information of the network hard disk recorder is stored to the 1 st to 5 th bytes of the data load portion, the identification information of the target audio/video data is stored to the 6 th to 10 th bytes of the data load portion, and the time information of the target audio/video data is stored to the 11 th to 15 th bytes of the data load portion. The embodiment of the present invention does not specifically limit the storage position, the order, and the like of the analysis result in the data load portion.
The protocol conversion server may add an internet packet header to the data payload portion when adding the internet packet header to the request data packet, and in practical applications, the internet packet header may include a destination network address, a source network address, a data length of the data payload portion, and the like. The destination network address may be a network address of the network hard disk recorder in the internet, and the source network address may be a network address of the protocol conversion server.
It should be noted that, the protocol conversion server may store in advance a correspondence between the network address of the network hard disk recorder and the identification information of the network hard disk recorder.
And step 504, the protocol conversion server sends the request data packet added with the internet packet header to the network video recorder according to the identification information of the network video recorder, and receives target audio and video data returned by the network video recorder according to the request data packet.
And the protocol conversion server determines to obtain the network address of the network hard disk video recorder according to the corresponding relation between the network address of the network hard disk video recorder and the identification information of the network hard disk video recorder which are stored in advance and the identification information of the network hard disk video recorder. And the protocol conversion server sends the request data packet added with the Internet head to the network video recorder according to the network address of the network video recorder.
After the network video recorder receives the request data packet added with the internet head, the internet head can be removed, and the identification information of the target audio and video data is obtained through analysis from the request data packet. The network video recorder can judge whether the target audio and video data exist in the network video recorder according to the identification information of the target audio and video data, and if the target audio and video data exist in the network video recorder, the network video recorder can extract the target audio and video data and generate a reply data packet for indicating the successful extraction. If the network hard disk video recorder does not have the target audio and video data, the network hard disk video recorder can generate a reply data packet for indicating the extraction failure. The reply data packet may include an internet packet header and a data load portion, where the internet packet header may include a network address of the network hard disk recorder and a network address of the protocol conversion server, and the data load portion may include an identifier indicating that the extraction is successful or failed, and the like.
After the protocol conversion server receives a reply data packet from the network video recorder, the protocol conversion server can remove an internet packet header of the reply data packet, extract reply information from a data load part, wherein the reply information is used for indicating that target audio and video data is successfully extracted or target audio and video data is unsuccessfully extracted, add a video network packet header to the reply information, send the reply information added with the video network packet header to a video network node server, analyze the reply information added with the video network packet header by the video network node server to obtain reply information, and send the reply information back to the video network terminal.
And 505, the protocol conversion server sends the target audio and video data to a video network node server so that the video network node server forwards the target audio and video data to a video network terminal, and the video network terminal is used for displaying the target audio and video data.
In the embodiment of the present invention, the process of the protocol conversion server sending the target audio/video data to the node server of the video network may refer to the process of the protocol conversion server sending the plurality of data packets back to the node server of the video network, which is not described herein again.
In a preferred embodiment of the present invention, after receiving the reply information, if the reply information indicates that the network hard disk video recorder extracts the target audio/video data, the video network terminal may start a preset audio/video decoder, and play the received target audio/video data by using the audio/video decoder.
Based on the above description of the embodiment of the audio and video data processing method, a live broadcast method of audio and video data is introduced below, and as shown in fig. 6, the method involves a network hard disk video recorder, a protocol conversion server, a video network node server, and a video network terminal. The network hard disk video recorder is positioned in the Internet, and the protocol conversion server, the video networking node server and the video networking terminal are positioned in the video networking. The network hard disk video recorder is connected with the protocol conversion server. The node server of the video network is respectively communicated with the protocol conversion server and the video network terminal. As shown in fig. 7, the terminal of the video network sends a live broadcast request data packet to the node server of the video network through its scheduling module, where the live broadcast request data packet includes a virtual number of the network hard disk recorder and is accompanied by specific time period information of audio and video data to be watched. After receiving the live broadcast request data packet, the scheduling module of the video network node server calls the protocol module to analyze, and if the virtual number of the network video recorder is obtained through analysis, a request signaling is formed again and sent to the protocol conversion server through the scheduling module. And if the request signaling indicates that the audio and video data at a certain moment in the network hard disk video recorder is requested to be live broadcast, the protocol module encapsulates the request signaling in an RTSP format, adds an internet packet header, and sends the request signaling to the network hard disk video recorder through the scheduling module. After the scheduling module of the network hard disk video recorder receives the request signaling in the RTSP format, if the requested audio and video data exists in the network hard disk video recorder, the network hard disk video recorder generates a data packet which is successfully acquired through the protocol module, and the data packet is replied to the protocol conversion server through the scheduling module. And after receiving the successfully acquired data packet, the scheduling module of the protocol conversion server removes the packet header of the Internet, extracts key information indicating successful acquisition, adds the packet header of the upper video network, and sends the packet header of the upper video network to the video network node server through the video network. After receiving the key information added with the head of the video network packet, a scheduling module of the video network node server analyzes the key information, generates a data packet with successful live broadcast through a protocol module, and sends the data packet to a video network terminal. And after receiving the data packet successfully live broadcast, a scheduling module of the video network terminal opens a self audio/video decoder and enters a decoding mode. And when the network hard disk video recorder generates and sends the successfully acquired data packet, the data module is utilized to send the audio and video data to the protocol conversion server. The data modules of the protocol conversion server and the video network node server can forward audio and video data to the data module of the video network terminal step by step, and finally, the data module of the video network terminal decodes and displays the audio and video data.
The embodiment of the invention is applied to the video network, the video network can comprise a protocol conversion server, a video network node server and a video network terminal, wherein the video network node server can be respectively communicated with the protocol conversion server and the video network terminal. Moreover, the video network can be connected with the internet, the internet can comprise the network video recorder and the cameras, the audio and video data of the cameras are stored on the network video recorder, and the protocol conversion server can be connected with the network video recorder.
In the embodiment of the invention, in the video network, a video network terminal sends a request message for acquiring target audio and video data on a network video recorder to a video network node server, wherein the request message can contain identification information of the network video recorder in the internet and identification information of the target audio and video data in the network video recorder. And the video network node server receives the request message, generates a request signaling according to the request message and transmits the request signaling to the protocol conversion server. And the protocol conversion server analyzes the request signaling to obtain the identification information of the network video recorder and the identification information of the target audio and video data, encapsulates the identification information of the network video recorder and the identification information of the target audio and video data into a request data packet supporting RTSP (real time streaming protocol), and adds an internet packet header to the request data packet so as to send the request data packet added with the internet packet header to the network video recorder in the internet through the internet. And the network video recorder receives the request data packet, determines target audio and video data according to the request data packet, and sends the target audio and video data to a protocol conversion server in the video network through the Internet. The protocol conversion server sends the target audio and video data to the video network terminal through the video network node server, and the video network terminal can display the received target audio and video data.
The embodiment of the invention applies the characteristics of the video network, and the protocol conversion server is deployed in the video network, can receive data in the video network, convert the data into data supporting an internet protocol, and send the data to the network video recorder in the internet. The protocol conversion server can also receive data of a network hard disk video recorder in the Internet, convert the data into data supporting a video networking protocol, and send the data to a video networking node server and a video networking terminal in the video networking. The protocol conversion server in the embodiment of the invention can acquire the target audio and video data from the network hard disk video recorder in the Internet and send the target audio and video data to the video network terminal in the video network so as to display the target audio and video data on the video network terminal. The embodiment of the invention avoids acquiring target audio and video data from a large number of cameras in the Internet, can acquire the target audio and video data from each camera only from the network video recorder in the Internet, does not need to access a large number of cameras into the video network, and reduces the workload of deploying the network and acquiring the audio and video data.
It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the illustrated order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments of the present invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.
Referring to fig. 8, there is shown a block diagram of a protocol conversion server in an embodiment of a processing system for audio and video data, which may be applied in a video network, where the video network includes: the system comprises a protocol conversion server, a video network node server and a video network terminal, wherein the video network node server is respectively communicated with the protocol conversion server and the video network terminal, the video network is connected with the Internet, the Internet comprises a network hard disk video recorder and cameras which are connected with each other, the network hard disk video recorder is stored with audio and video data of each camera, the protocol conversion server is connected with the network hard disk video recorder, and the protocol conversion server specifically comprises the following modules:
a receiving module 801, configured to receive a request signaling from the node server of the video networking, where the node server of the video networking is configured to receive a request message from the terminal of the video networking, and generate the request signaling according to the request message; the analysis module 802 is configured to analyze the request signaling to obtain identification information of the network hard disk recorder and identification information of target audio/video data; an encapsulating module 803, configured to encapsulate the identification information of the network hard disk recorder and the identification information of the target audio/video data into a request packet supporting a real-time streaming protocol RTSP, and add an internet packet header to the request packet; a sending module 804, configured to send the request data packet added with the internet packet header to the network video recorder according to the identification information of the network video recorder, and receive the target audio and video data returned by the network video recorder according to the request data packet; the sending module 804 is further configured to send the target audio and video data to the video network node server, where the video network node server is configured to forward the target audio and video data to the video network terminal, and the video network terminal is configured to display the target audio and video data.
In a preferred embodiment of the present invention, the receiving module 801 is further configured to receive a reply data packet from the network hard disk recorder after the sending module 804 sends the request data packet added with the internet packet header to the network hard disk recorder according to the identification information of the network hard disk recorder; the protocol conversion server further includes: an extracting module 805, configured to extract reply information from the reply data packet, and add a video network packet header to the reply information; the sending module 804 is further configured to send the reply information added with the video network packet header to the video network node server, where the video network node server is configured to analyze the reply information added with the video network packet header to obtain the reply information, and send the reply information to the video network terminal.
In a preferred embodiment of the present invention, the video network terminal is configured to start a preset audio/video decoder according to the reply information, and play the target audio/video data by using the audio/video decoder.
In a preferred embodiment of the present invention, the parsing module 802 is further configured to parse the request signaling to obtain time information of the target audio/video data.
In a preferred embodiment of the present invention, the encapsulating module 803 is further configured to encapsulate the identification information of the network hard disk recorder, the identification information of the target audio/video data, and the time information into a request packet supporting the RTSP.
For the system embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.
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 method for processing audio and video data and the system for processing audio and video data provided by the invention are introduced in detail, and a specific example is applied in the text to explain the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the 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 processing method of audio and video data is characterized in that the method is applied to a video network, and the video network comprises the following steps: the system comprises a protocol conversion server, a video network node server and a video network terminal, wherein the video network node server is respectively communicated with the protocol conversion server and the video network terminal, the video network is connected with the Internet, the Internet comprises a network video recorder and cameras which are connected with each other, audio and video data of each camera are stored in the network video recorder, the protocol conversion server is connected with the network video recorder, and the method comprises the following steps:
the protocol conversion server receives a request signaling from the video network node server, and the video network node server is used for receiving a request message from the video network terminal and generating the request signaling according to the request message;
the protocol conversion server analyzes the request signaling to obtain the identification information of the network video recorder and the identification information of the target audio and video data;
the protocol conversion server packages the identification information of the network video recorder and the identification information of the target audio and video data into a request data packet supporting a real-time streaming protocol (RTSP), and adds an internet packet header to the request data packet;
the protocol conversion server sends the request data packet added with the internet packet header to the network video recorder according to the identification information of the network video recorder, and receives the target audio and video data returned by the network video recorder according to the request data packet;
the protocol conversion server sends the target audio and video data to the video network node server, the video network node server is used for forwarding the target audio and video data to the video network terminal, and the video network terminal is used for displaying the target audio and video data;
after the step of sending the request data packet added with the internet packet header to the network video recorder by the protocol conversion server according to the identification information of the network video recorder, the method further comprises the following steps:
the protocol conversion server receives a reply data packet from the network hard disk video recorder;
the protocol conversion server extracts reply information from the reply data packet and adds a video network packet header to the reply information;
the protocol conversion server sends the reply information added with the video network packet header to the video network node server, and the video network node server is used for analyzing the reply information added with the video network packet header to obtain the reply information and sending the reply information to the video network terminal;
the reply information is used for indicating that the target audio and video data is successfully extracted or the target audio and video data is unsuccessfully extracted;
the generation of the reply message comprises the following steps:
the network video recorder judges whether the target audio and video data exist or not according to the identification information of the target audio and video data;
when the target audio and video data exist in the network hard disk video recorder, the network hard disk video recorder extracts the target audio and video data and generates a reply data packet representing successful extraction;
when the target audio and video data does not exist in the network hard disk video recorder, the network hard disk video recorder can generate a reply data packet representing extraction failure.
2. The method for processing the audio/video data according to claim 1, wherein the video networking terminal is configured to start a preset audio/video decoder according to the reply information, and play the target audio/video data by using the audio/video decoder.
3. The method for processing audio/video data according to claim 1, wherein when the protocol conversion server parses the request signaling, the method further comprises:
and the protocol conversion server analyzes the request signaling to obtain the time information of the target audio and video data.
4. A method for processing audio-visual data according to claim 3, characterized in that the method further comprises:
and the protocol conversion server packages the identification information of the network video recorder, the identification information of the target audio and video data and the time information into a request data packet supporting the RTSP.
5. A processing system of audio and video data is characterized in that the system is applied to a video network, and the video network comprises: protocol conversion server, video networking node server and video networking terminal, video networking node server respectively with protocol conversion server with the communication of video networking terminal, the video networking is connected with the internet, the internet includes interconnect's network hard disk video recorder and camera, the last storage of network hard disk video recorder has each the audio and video data of camera, protocol conversion server with network hard disk video recorder connects, protocol conversion server includes:
the receiving module is used for receiving a request signaling from the video network node server, and the video network node server is used for receiving a request message from the video network terminal and generating the request signaling according to the request message;
the analysis module is used for analyzing the request signaling to obtain the identification information of the network video recorder and the identification information of the target audio and video data;
the packaging module is used for packaging the identification information of the network video recorder and the identification information of the target audio and video data into a request data packet supporting a real-time streaming protocol (RTSP), and adding an internet packet header to the request data packet;
the sending module is used for sending the request data packet added with the internet packet header to the network video recorder according to the identification information of the network video recorder and receiving the target audio and video data returned by the network video recorder according to the request data packet;
the sending module is further used for sending the target audio and video data to the video network node server, the video network node server is used for forwarding the target audio and video data to the video network terminal, and the video network terminal is used for displaying the target audio and video data;
the receiving module is further configured to receive a reply data packet from the network hard disk video recorder after the sending module sends the request data packet added with the internet packet header to the network hard disk video recorder according to the identification information of the network hard disk video recorder;
the protocol conversion server further includes:
the extraction module is used for extracting reply information from the reply data packet and adding a video network packet header to the reply information;
the sending module is further configured to send the reply information added with the video network packet header to the video network node server, and the video network node server is configured to analyze the reply information added with the video network packet header to obtain the reply information and send the reply information to the video network terminal;
the reply information is used for indicating that the target audio and video data is successfully extracted or the target audio and video data is unsuccessfully extracted;
the network hard disk video recorder comprises:
the judging module is used for judging whether the target audio and video data exist according to the identification information of the target audio and video data;
the first generation module is used for extracting the target audio and video data and generating a reply data packet representing successful extraction when the target audio and video data exists in the network hard disk video recorder;
and the second generation module is used for generating a reply data packet representing extraction failure when the target audio and video data does not exist in the network hard disk video recorder.
6. The system for processing audio/video data according to claim 5, wherein the video networking terminal is configured to start a preset audio/video decoder according to the reply information, and play the target audio/video data by using the audio/video decoder.
7. The system for processing audio/video data according to claim 5, wherein the parsing module is further configured to parse the request signaling to obtain time information of the target audio/video data.
8. The system for processing audio/video data according to claim 7, wherein the encapsulation module is further configured to encapsulate the identification information of the network hard disk recorder, the identification information of the target audio/video data, and the time information into a request packet supporting the RTSP.
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