CN110087147B - Audio and video stream transmission method and device - Google Patents
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- H—ELECTRICITY
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/239—Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests
- H04N21/2393—Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests involving handling client requests
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- H—ELECTRICITY
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- 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
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- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/858—Linking data to content, e.g. by linking an URL to a video object, by creating a hotspot
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Abstract
The invention provides a method and a device for transmitting audio and video streams. The method comprises the following steps: the method comprises the steps of analyzing an audio and video request from a first terminal to determine an analysis result corresponding to the audio and video request, requesting an audio and video stream corresponding to the analysis result from a video network server, creating a virtual end, establishing a transmission channel between the virtual end and a real-time message transfer protocol rtmp server, sending the audio and video stream requested by the video network server to the transmission channel through the virtual end, and transmitting the audio and video stream to the rtmp server through the transmission channel. By adopting the scheme of the invention, the audio and video stream generated by the terminal in the video network or the audio and video stream generated by the mobile terminal adopting the internet protocol and the computer is played on the related audio and video equipment in the format of rtmp protocol without special protocol conversion equipment, thereby not only reducing the steps of protocol conversion, but also greatly reducing the cost of users and leading the application field of the video network to be wider.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method and an apparatus for audio and video streaming.
Background
rtmp (real Time Messaging protocol) real-Time Messaging protocol is an open protocol developed by Adobe Systems for audio, video and data transmission between Flash players and servers. The protocol is based on a Transmission Control Protocol (TCP), is a protocol family and is mainly used for audio/video and data communication between a Flash/AIR platform and a streaming media/interaction server supporting rtmp protocol.
The video network is a real-time exchange platform and is a higher-level form of the internet, and the video network pushes a plurality of internet applications to high-definition video, unification and high-definition face-to-face. Finally, world no distance is realized, and the distance between people in the world is only the distance of one screen; on the other hand, the video network has the flexibility, simplicity and low price of packet switching, simultaneously has the quality and safety guarantee of circuit switching, and realizes the seamless connection of the whole network switching type virtual circuit and the data format for the first time in the communication history.
When the audio and video stream of the traditional internet protocol and the audio and video stream of the rtmp protocol need to be converted with each other, a special protocol conversion device is needed to perform deep protocol butt joint to perform mutual playing, which increases the cost of a user, and the rtmp protocol does not have related service interaction with the video network, so that the audio and video stream generated by a terminal in the video network cannot be played on related audio and video devices in the format of the rtmp protocol, the audio and video stream of the video network protocol needs to be firstly converted into the audio and video stream of the internet protocol, and then the audio and video stream of the internet protocol is converted into the audio and video stream of the rtmp protocol, which further greatly increases the cost of the user and hinders the development field of the video network.
Disclosure of Invention
The invention provides a method, a device and a system for transmitting audio and video streams, which solve the problem that the audio and video streams generated by a terminal in a video network cannot be played on related audio and video equipment in a format of rtmp protocol.
In order to solve the above technical problem, an embodiment of the present invention provides a method for transmitting audio and video streams, where the method is applied to a streaming media server, the streaming media server is connected to a video network server in a video network, and the method includes:
analyzing an audio and video request from a first terminal to determine an analysis result corresponding to the audio and video request; the audio and video request is used for requesting audio and video information in a second terminal from the second terminal, the first terminal is a non-video network terminal, and the second terminal is a video network terminal;
requesting the audio and video stream corresponding to the analysis result from the video networking server, and creating a virtual end;
establishing a transmission channel between the virtual end and a real-time message transfer protocol (rtmp) server;
and sending the audio and video stream requested by the video networking server to the transmission channel through the virtual end, so as to transmit the audio and video stream to the rtmp server through the transmission channel.
Optionally, analyzing an audio/video request from a first terminal to determine an analysis result corresponding to the audio/video request includes:
analyzing an audio and video request from a first terminal to obtain a format of the audio and video request;
determining an analysis result corresponding to the audio and video request according to the format of the audio and video request, wherein the analysis result comprises: the internet protocol address and the port of the streaming media server, the audio and video stream type corresponding to the audio and video request and the video networking number of the second terminal.
Optionally, sending, by the virtual terminal, the audio/video stream requested by the video networking server to the transmission channel includes:
processing the audio and video stream through the virtual end, and processing the audio and video stream in a video networking format into an audio and video stream in an rtmp format;
and transmitting the audio and video stream in the rtmp format to the transmission channel through the virtual end.
Optionally, the format of the audio-video request is determined according to a format of a uniform resource locator.
Optionally, the parsing result includes: the requesting the audio/video stream corresponding to the analysis result from the video network server by using the mobile terminal number or the computer number comprises the following steps:
requesting audio and video streams corresponding to the audio and video request to a mobile terminal corresponding to the mobile terminal number;
or requesting the computer corresponding to the computer number for the audio and video stream corresponding to the audio and video request.
The embodiment of the invention also provides a device for transmitting audio and video streams, which is applied to a streaming media server, wherein the streaming media server is connected with a video network server in a video network, and the device comprises:
the analysis determining module is used for analyzing the audio and video request from the first terminal so as to determine an analysis result corresponding to the audio and video request; the audio and video request is used for requesting audio and video information in a second terminal from the second terminal, the first terminal is a non-video network terminal, and the second terminal is a video network terminal;
the request creating module is used for requesting the audio and video stream corresponding to the analysis result from the video networking server and creating a virtual end;
the channel establishing module is used for establishing a transmission channel between the virtual end and a real-time message transfer protocol (rtmp) server;
and the transmitting and transmitting module is used for transmitting the audio and video stream requested by the video networking server to the transmission channel through the virtual terminal so as to transmit the audio and video stream to the rtmp server through the transmission channel.
Optionally, the parsing determining module includes:
the analysis submodule is used for analyzing the audio and video request from the first terminal to obtain the format of the audio and video request;
the determining submodule is used for determining an analysis result corresponding to the audio and video request according to the format of the audio and video request, and the analysis result comprises: the internet protocol address and the port of the streaming media server, the audio and video stream type corresponding to the audio and video request and the video networking number of the second terminal.
Optionally, the sending transmission module includes:
the processing submodule is used for processing the audio and video stream through the virtual end and processing the audio and video stream in the video networking format into an audio and video stream in an rtmp format;
and the transmission submodule is used for transmitting the audio and video stream in the rtmp format to the transmission channel through the virtual terminal.
Optionally, the apparatus further comprises:
and the format determining module is used for determining the format of the audio and video request according to the format of the uniform resource locator.
Optionally, the parsing result includes: a mobile terminal number or a computer number, the request creation module comprising:
the mobile fixed terminal request submodule is used for requesting the mobile terminal corresponding to the mobile terminal number for the audio and video stream corresponding to the audio and video request;
or, the audio/video request server is further configured to request the audio/video stream corresponding to the audio/video request from the computer corresponding to the computer number.
Compared with the prior art, the audio and video stream transmission method and device provided by the invention have the advantages that after the streaming media server receives the audio and video request of the first terminal, the request is analyzed, the analysis result corresponding to the audio and video request is determined, the audio and video stream corresponding to the analysis result is requested to the video networking server, the virtual end is established, the audio and video stream transmission channel between the virtual end and the rtmp server is established, the obtained audio and video stream is sent to the audio and video stream transmission channel, and the audio and video stream is transmitted to the rtmp server through the transmission channel. By adopting the scheme of the invention, the audio and video stream generated by the terminal in the video network is played on the related audio and video equipment in the format of rtmp protocol without special protocol conversion equipment, thereby not only reducing the steps of protocol conversion, but also greatly reducing the cost of users, and leading the application field of the video network to be wider.
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In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
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 flow chart of a method of audio and video stream transmission according to an embodiment of the present invention;
fig. 6 is a schematic diagram of audio and video stream transmission according to an embodiment of the present invention;
fig. 7 is a block diagram of an apparatus for audio/video stream transmission according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
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, the streaming media server acquires the request sent by the intelligent terminal according to the protocol of the video network, and analyzes the request to acquire the audio and video stream from the video network server, so that the audio and video stream in the video network can be partially played on the related equipment in an rtmp format.
Fig. 5 shows a flowchart of a method for transmitting audio and video streams, where the method is applied to a streaming media server, the streaming media server is connected to a video network server in a video network, and the method for transmitting audio and video streams includes the following steps:
step 501: analyzing the audio and video request from the first terminal to determine an analysis result corresponding to the audio and video request; the audio and video request is used for requesting audio and video information in the second terminal from the second terminal, the first terminal is a non-video network terminal, and the second terminal is a video network terminal.
In the embodiment of the invention, a program for playing rtmp-format audio and video is installed on a first terminal, the first terminal comprises but is not limited to personal computers, servers, smart phones and other devices which can install the program for playing rtmp-format audio and video so as to play rtmp-format audio and video, and the first terminal is a terminal which is not in a video network.
When the audio and video stream of a second terminal in the video network needs to be watched, the streaming media server receives the audio and video request sent by the first terminal, and the audio and video request is the audio and video in the rtmp format which needs to be watched because the first terminal needs to play the audio and video in the rtmp format. The format of the audio-video request is determined according to the format of the uniform resource locator, and generally, the formats of the audio-video request and the uniform resource locator are the same, for example, the format of an audio-video request is as follows: rtmp: //10.1.7.65: 1935/live/aabb.
Optionally, step 501 specifically includes:
step 501 a: and analyzing the audio and video request from the first terminal to obtain the format of the audio and video request.
In the embodiment of the present invention, after receiving an audio/video request from a first terminal, a streaming media server first parses a format of the audio/video request, because the streaming media server receives a plurality of requests at the same time, formats of the requests may generate different request formats according to different protocols used by the first terminal that sends the request, for example, a request sent by the first terminal that uses an internet protocol may be: rtmp: //192.168.1.110: 1935/live/aabb.
Step 501 b: determining an analysis result corresponding to the audio and video request according to the format of the audio and video request, wherein the analysis result comprises: the internet protocol address and the port of the streaming media server, the audio and video stream type corresponding to the audio and video request and the video networking number of the second terminal.
In the embodiment of the present invention, the streaming media server obtains the specific content of the audio/video request, that is, the analysis result of the audio/video request, according to the format of the audio/video request, where the result includes: the internet protocol address and the port of the streaming media server, the audio and video stream type corresponding to the audio and video request and the video networking number distributed to the second terminal by the video networking server. For example: the audio and video request is as follows: rtmp: 1935/live/aabb, 10.1.7.65 in the analyzed result is the internet protocol address of the streaming media server, because there are many actual streaming media servers, the specific streaming media server is determined according to the internet protocol address; 1935 is a port, which is a port dedicated for rtmp server; live (live) is the type of the audio and video stream corresponding to the audio and video request; aabb is the video networking number allocated to the terminal by the video networking server, and the video networking number allocated to the terminal by the video networking server is generally 5 bits, for example, the video networking number of the terminal in one video networking is: 02866, the audio and video request is specifically: rtmp: //10.1.7.65: 1935/live/02866.
Step 502: and requesting the video networking server for the audio and video stream corresponding to the analysis result, and creating a virtual end.
In the embodiment of the invention, after the streaming media server determines the analysis result of the audio/video request, the streaming media server can request the audio/video stream corresponding to the analysis result from the video network server according to the result, and creates the virtual terminal. For example, the first request specifically includes: rtmp: and/10.1.7.65: 1935/live/02866, the streaming media server requests the video networking server for the audio and video stream on the terminal corresponding to the video networking number 02866. A virtual terminal is allocated to the terminal of the video networking number 02866 in the video networking server, and the virtual terminal can receive the audio and video stream on the terminal of the video networking number 02866, so that the streaming media server can acquire the audio and video stream of the terminal corresponding to the video networking number 02866 from the video networking server. After acquiring the audio and video stream on the terminal of 02866 in the video network, the streaming media server creates a virtual end, which is equivalent to a client of the rtmp server and can realize the transmission of the audio and video stream in rtmp format with the actual rtmp server.
If the audio/video generation device requested to be watched by the first terminal is not a device in the video network but a mobile terminal or a computer adopting an internet protocol, the analysis result of the audio/video request comprises: a mobile terminal number or a computer number, and step 502 further includes:
step 502': requesting audio and video stream corresponding to the audio and video request to a mobile terminal corresponding to the mobile terminal number; or requesting the computer corresponding to the computer number for the audio and video stream corresponding to the audio and video request.
In the embodiment of the invention, if the generation equipment of the audio and video requested to be watched by the first terminal is not equipment in the video network but equipment adopting an internet protocol, the mobile terminal corresponding to the mobile terminal number can be requested for the audio and video stream corresponding to the audio and video request; or requesting the computer corresponding to the computer number for the audio and video stream corresponding to the audio and video request. Because the number of the mobile terminal or the number of the computer is 4 digits, for example, the number of one mobile terminal is 0202, the format of the audio/video request sent by the first terminal to the streaming media server is as follows: rtmp: 1935/live/0202, after the streaming media server analyzes the audio and video request, the streaming media server can acquire audio and video stream from the mobile terminal with the number of 0202, and then creates a virtual terminal; or the number of one computer is 5566, the format of the audio and video request sent by the first terminal to the streaming media server is as follows: rtmp: 1935/live/5566, after the streaming media server analyzes the audio and video request, the streaming media server can acquire the audio and video stream from the computer with the number 5566, and then creates a virtual end.
Step 503: and establishing a transmission channel between the virtual end and the real-time messaging protocol rtmp server.
In the embodiment of the invention, after the stream media server creates the virtual end, an audio and video stream transmission channel is established between the virtual end and the actual rtmp server, and the channel is used for the virtual end to transmit audio and video streams in rtmp format to the actual rtmp server.
Step 504: and sending the audio and video stream requested by the video networking server to a transmission channel through the virtual terminal so as to transmit the audio and video stream to the rtmp server through the transmission channel.
In the embodiment of the invention, after the audio and video stream transmission channel is established, the stream media server controls the virtual terminal to send the acquired audio and video stream to the audio and video stream transmission channel so as to transmit the acquired audio and video stream to the actual rtmp server through the transmission channel, and the first terminal can see the corresponding audio and video stream through the actual rtmp server. The scheme of the invention realizes that the audio and video stream generated by the terminal in the video network or the audio and video stream generated by the mobile terminal and the computer adopting the interconnection protocol is played on the first terminal in the format of rtmp protocol by the streaming media server, and a protocol conversion device does not need to be configured independently, thereby greatly reducing the cost of a user and widening the application field of the video network.
Optionally, step 504 specifically includes:
step 504 a: and processing the audio and video stream through the virtual end, and processing the audio and video stream in the video networking format into an audio and video stream in an rtmp format.
In the embodiment of the invention, after the audio and video stream transmission channel is established, the streaming media server controls the virtual terminal to process the format of the acquired audio and video stream, and because the audio and video stream generated by the second terminal is in the format of the video network, the streaming media server is required to process the audio and video stream in the format of the video network into the audio and video stream in the rtmp format.
Step 504 b: and transmitting the audio and video stream in the rtmp format to a transmission channel through the virtual end.
In the embodiment of the invention, after the acquired audio and video stream is converted into the audio and video stream in the rtm format, the streaming media server controls the virtual end, and the audio and video stream in the rtm format is input into an audio and video stream transmission channel, namely, the audio and video stream generated by a terminal in the video network or the audio and video stream generated by a mobile end and a computer adopting an interconnection protocol is transmitted into an actual rtm server. And the intelligent terminal needing to be watched can watch the audio and video stream in the actual rtmp server.
As shown in fig. 6, which illustrates a schematic diagram of audio and video stream transmission according to an embodiment of the present invention, a streaming media server is connected to a rtmp server, an intelligent terminal, a computer, and a video network server, respectively, the intelligent terminal is installed with a program for playing audio and video in rtmp format, both a terminal in the video network and a computer in the internet generate audio and video streams, the number of the terminal is 01088, and the number of the computer is 3322.
The streaming media server receives an audio and video request sent by an intelligent terminal: rtmp: and/10.1.7.65: 1935/live/01088, analyzing the audio and video request, and determining that the analysis result is as follows: internet protocol address of streaming server: 10.1.7.65, respectively; rtmp-specific port: 1935; the type of the audio/video stream corresponding to the audio/video request is as follows: live; video networking number of terminal in video networking: 01088.
the method comprises the steps that a streaming media server requests audio and video streams on a 01088 terminal from a video networking server, after the streaming media server obtains the audio and video streams on the 01088 terminal, a virtual end equivalent to a client of a rtmp server is created, an audio and video stream transmission channel is established between the virtual end and an actual rtmp server, the streaming media server controls the virtual end, the audio and video streams on the 01088 terminal are processed into audio and video streams in a rtmp format, the audio and video streams in the rtmp format are sent to the audio and video stream transmission channel, and then the audio and video streams are transmitted to the actual rtmp server through the transmission channel. Then the intelligent terminal is according to the address: rtmp: and/10.1.7.65: 1935/live/01088, and audio and video streams on a 01088 terminal in the video network are received in an actual rtmp server.
If the streaming media server receives the audio and video request sent by the intelligent terminal: rtmp: and/192.168.1.111: 1935/live/3322, analyzing the audio and video request, and determining that the analysis result is as follows: internet protocol address of streaming server: 192.168.1.111, respectively; rtmp-specific port: 1935; and the type of the audio and video stream corresponding to the first request is as follows: live; a computer: 3322.
the streaming media server requests audio and video streams for a 3322 computer, creates a virtual end equivalent to a client of the rtmp server after the audio and video streams are acquired, establishes an audio and video stream transmission channel between the virtual end and the actual rtmp server, controls the virtual end by the streaming media server, processes the audio and video streams on the 3322 computer into rtmp-format audio and video streams, sends the rtmp-format audio and video streams to the audio and video stream transmission channel, and transmits the rtmp-format audio and video streams to the actual rtmp server through the transmission channel. Then the intelligent terminal is according to the address: rtmp: and/192.168.1.111: 1935/live/3322, audio and video streams on a 3322 computer are received in an actual rtmp server.
Fig. 7 shows a block diagram of an apparatus for audio and video streaming according to an embodiment of the present invention, where the apparatus is applied to a streaming media server, the streaming media server is connected to a video network server in a video network, and the apparatus for audio and video streaming includes:
the analysis determining module 710 is configured to analyze the audio/video request from the first terminal to determine an analysis result corresponding to the audio/video request; the audio and video request is used for requesting audio and video information in a second terminal from the second terminal, the first terminal is a non-video network terminal, and the second terminal is a video network terminal;
a request creating module 720, configured to request the video networking server for an audio/video stream corresponding to the parsing result, and create a virtual end;
a channel establishing module 730, configured to establish a transmission channel between the virtual terminal and the rtmp server;
and the transmitting and transmitting module 740 is configured to transmit the audio and video stream requested by the video networking server to the transmission channel through the virtual terminal, so as to transmit the audio and video stream to the rtmp server through the transmission channel.
Optionally, the parsing determining module includes:
the analysis submodule is used for analyzing the audio and video request from the first terminal to obtain the format of the audio and video request;
the determining submodule is used for determining an analysis result corresponding to the audio and video request according to the format of the audio and video request, and the analysis result comprises: the internet protocol address and the port of the streaming media server, the audio and video stream type corresponding to the audio and video request and the video networking number of the second terminal.
Optionally, the sending transmission module includes:
the processing submodule is used for processing the audio and video stream through the virtual end and processing the audio and video stream in the video networking format into the audio and video stream in the rtmp format;
and the transmission submodule is used for transmitting the audio and video stream in the rtmp format to the transmission channel through the virtual terminal.
Optionally, the apparatus for audio-video streaming further includes:
and the format determining module is used for determining the format of the audio and video request according to the format of the uniform resource locator.
Optionally, the parsing result includes: the mobile terminal number or the computer number, and the audio and video stream transmission device further comprises:
the mobile fixed terminal request module is used for requesting audio and video streams corresponding to the audio and video requests to the mobile terminal corresponding to the mobile terminal number;
or, the method is also used for requesting the computer corresponding to the computer number for the audio and video stream corresponding to the audio and video request.
Through the embodiment, the method and the device for transmitting the audio and video stream are characterized in that after receiving an audio and video request, a streaming media server analyzes the request, requests the audio and video stream corresponding to the audio and video request to a video networking server according to the analysis result, or requests the audio and video stream corresponding to the audio and video request to a computer by adopting a mobile terminal of an internet protocol, then creates a virtual terminal, establishes an audio and video stream transmission channel between the virtual terminal and an actual rtmp server, controls the virtual terminal to perform protocol conversion on the acquired audio and video stream, then inputs the converted audio and video stream into the audio and video stream transmission channel, and transmits the converted audio and video stream to the actual rtmp server through the transmission channel. By adopting the scheme of the invention, the audio and video stream generated by the terminal in the video network or the audio and video stream generated by the mobile terminal adopting the internet protocol and the computer is played on the related audio and video equipment in the format of rtmp protocol without special protocol conversion equipment, thereby not only reducing the steps of protocol conversion, but also greatly reducing the cost of users and leading the application field of the video network to be wider.
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, herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus 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 apparatus. 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 apparatus that comprises the element.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A method for audio and video stream transmission is characterized in that the method is applied to a streaming media server, the streaming media server is connected with a video network server in a video network, and the method comprises the following steps:
analyzing an audio and video request from a first terminal to determine an analysis result corresponding to the audio and video request; the audio and video request is used for requesting audio and video information in a second terminal from the second terminal, the first terminal is a non-video network terminal, and the second terminal is a video network terminal;
requesting the audio and video stream corresponding to the analysis result from the video networking server, and creating a virtual end;
establishing a transmission channel between the virtual end and a real-time message transfer protocol (rtmp) server;
and sending the audio and video stream requested by the video networking server to the transmission channel through the virtual end, so as to transmit the audio and video stream to the rtmp server through the transmission channel.
2. The method according to claim 1, wherein analyzing the audio/video request from the first terminal to determine an analysis result corresponding to the audio/video request comprises:
analyzing an audio and video request from a first terminal to obtain a format of the audio and video request;
determining an analysis result corresponding to the audio and video request according to the format of the audio and video request, wherein the analysis result comprises: the internet protocol address and the port of the streaming media server, the audio and video stream type corresponding to the audio and video request and the video networking number of the second terminal.
3. The method of claim 1, wherein sending, by the virtual terminal, the audio/video stream requested from the video networking server to the transmission channel comprises:
processing the audio and video stream through the virtual end, and processing the audio and video stream in a video networking format into an audio and video stream in an rtmp format;
and transmitting the audio and video stream in the rtmp format to the transmission channel through the virtual end.
4. The method of claim 2, wherein the format of the audiovisual request is determined in accordance with a format of a uniform resource locator.
5. The method of claim 1, wherein the parsing comprises: the requesting the audio/video stream corresponding to the analysis result from the video network server by using the mobile terminal number or the computer number comprises the following steps:
requesting audio and video streams corresponding to the audio and video request to a mobile terminal corresponding to the mobile terminal number;
or requesting the computer corresponding to the computer number for the audio and video stream corresponding to the audio and video request.
6. The device for audio and video stream transmission is characterized in that the device is applied to a streaming media server, the streaming media server is connected with a video network server in a video network, and the device comprises:
the analysis determining module is used for analyzing the audio and video request from the first terminal so as to determine an analysis result corresponding to the audio and video request; the audio and video request is used for requesting audio and video information in a second terminal from the second terminal, the first terminal is a non-video network terminal, and the second terminal is a video network terminal;
the request creating module is used for requesting the audio and video stream corresponding to the analysis result from the video networking server and creating a virtual end;
the channel establishing module is used for establishing a transmission channel between the virtual end and a real-time message transfer protocol (rtmp) server;
and the transmitting and transmitting module is used for transmitting the audio and video stream requested by the video networking server to the transmission channel through the virtual terminal so as to transmit the audio and video stream to the rtmp server through the transmission channel.
7. The apparatus of claim 6, wherein the parsing determination module comprises:
the analysis submodule is used for analyzing the audio and video request from the first terminal to obtain the format of the audio and video request;
the determining submodule is used for determining an analysis result corresponding to the audio and video request according to the format of the audio and video request, and the analysis result comprises: the internet protocol address and the port of the streaming media server, the audio and video stream type corresponding to the audio and video request and the video networking number of the second terminal.
8. The apparatus of claim 6, wherein the sending transmission module comprises:
the processing submodule is used for processing the audio and video stream through the virtual end and processing the audio and video stream in the video networking format into an audio and video stream in an rtmp format;
and the transmission submodule is used for transmitting the audio and video stream in the rtmp format to the transmission channel through the virtual terminal.
9. The apparatus of claim 7, further comprising:
and the format determining module is used for determining the format of the audio and video request according to the format of the uniform resource locator.
10. The apparatus of claim 6, wherein the parsing result comprises: a mobile terminal number or a computer number, the request creation module comprising:
the mobile fixed terminal request submodule is used for requesting the mobile terminal corresponding to the mobile terminal number for the audio and video stream corresponding to the audio and video request;
or, the audio/video request server is further configured to request the audio/video stream corresponding to the audio/video request from the computer corresponding to the computer number.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102131084A (en) * | 2010-01-19 | 2011-07-20 | 深圳市在线通网络科技开发有限公司 | RTMP (Real Time Messaging Protocol) pushing device and method for audio/video streaming media |
| CN103533315A (en) * | 2013-09-11 | 2014-01-22 | 天脉聚源(北京)传媒科技有限公司 | Method and device for processing audio/video data |
| CN108418778A (en) * | 2017-02-09 | 2018-08-17 | 北京视联动力国际信息技术有限公司 | A kind of internet and method, apparatus and interactive system regarding connected network communication |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102131084A (en) * | 2010-01-19 | 2011-07-20 | 深圳市在线通网络科技开发有限公司 | RTMP (Real Time Messaging Protocol) pushing device and method for audio/video streaming media |
| CN103533315A (en) * | 2013-09-11 | 2014-01-22 | 天脉聚源(北京)传媒科技有限公司 | Method and device for processing audio/video data |
| CN108418778A (en) * | 2017-02-09 | 2018-08-17 | 北京视联动力国际信息技术有限公司 | A kind of internet and method, apparatus and interactive system regarding connected network communication |
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