CN104349128A - Video and audio coding equipment and system and storage extraction method thereof - Google Patents
Video and audio coding equipment and system and storage extraction method thereof Download PDFInfo
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Abstract
The invention discloses video and audio coding equipment and system and a storage extraction method thereof. The video and audio coding equipment comprises at least one video and audio acquisition board, a main chip processing board and at least one network data receiving and transmitting board, wherein the video and audio acquisition board is used for receiving various video and audio code stream signals through an external video and audio interface; the main chip processing board is connected with the video and audio acquisition board through a video and audio general interface, and is used for coding and compressing the video and audio code stream signals and generating processed data code streams; the network data receiving and transmitting board is connected with the main chip processing board through the video and audio general interface, and is used for realizing interaction with a network through the external video and audio interface in order to transmit the processed data code streams to the network and receive data packets from the network.
Description
Technical field
The present invention relates to a kind of video encoding apparatus field, specifically, relate to a kind of input interface, output interface can flexible configuration video encoding equipment and store extracting method.
Background technology
In recent years, along with the fast development of security protection industry, the resolution of CCTV camera has developed into high definition (HD), full HD (Full HD), even ultra high-definition from SD.Supervisory control system also develops into the networked control stage gradually from simulation monitoring, digital monitoring.The output interface of CCTV camera becomes varied, as BNC, CVBS, HD-SDI, HDMI etc.Meanwhile, the video and audio output interface of some equipment, as VGA, RCA, YPbPr etc., also has the demand of being watched by real-time performance remote playing.
Namely video encoding equipment be realize the reception to specific video and audio interface data, compressed encoding, and the equipment being sent to network function; Coordinate with front monitoring front-end, in conjunction with network, can network consisting supervisory control system; Play front end with video and audio to coordinate, in conjunction with network, long-range video and audio can be realized and play, VOD system.
Existing video encoding equipment, take fixing input, output interface form, only provides one or more video and audio input interfaces, and fixing network interface or optical fiber port export, and there are the following problems for it:
(1) user needs the encoding device of selecting applicable its own interfaces to require, if later stage oneself requirement changes, needs shopping goods again, and existing encoder device will cause waste.
(2) user generally only uses a kind of input interface of encoding device, and comprise one or more form, all the other interfaces do not used can cause waste.
(3) work as input, output interface does not change, and when only need increase encoding device processing capacity, designer needs overall redesign hardware, and upgrade cost is high, and the cycle is long.
Existing encoding device generally takes the strategy of concentrated storage administration, video/audio code stream is sent back storage center in real time and stores.Along with increasing of coding way, the lifting of video and audio quality, bandwidth resources seem more and more rare, and in supervisory control system, the general Video data only adjusting back some accident of display, the readjustment rate of video/audio is not high.Centralized storage wastes valuable bandwidth resources undoubtedly.And along with the development of memory technology, the volume of memory device reduces gradually, and capacity expands gradually, stability, reliability, environmental suitability are all in lifting.These development are stored all to this locality of encoding device and provide guarantee.
Summary of the invention
The invention provides a kind of video encoding equipment for solving the problem, comprising: at least one video and audio collection plate, for by outside video and audio interface, receive various video/audio code stream signal; Master chip disposable plates, connects described video and audio collection plate by a video and audio general-purpose interface, and this master chip disposable plates is used for encoding to described video/audio code stream signal, compressing process, and produces the data code flow after process; And at least one network data transceiver boards, described master chip disposable plates is connected by a network data general-purpose interface, and mutual for by external network data Interface realization and network, to send the packet that the data code flow after described process and reception carry out automatic network to network.
Above-mentioned video encoding equipment, wherein said video and audio collection plate, master chip disposable plates and network data transceiver boards connect with modularization inserting mode with flexible configuration.
Above-mentioned video encoding equipment, wherein said master chip disposable plates comprises: data processing module, for the process to video/audio; RS232/485 module, docks The Cloud Terrace for providing standard 232/485 communication protocol interface and realizes the control of video encoding equipment to The Cloud Terrace; Memory module, connects at least one external storage device, for storing the data code flow after described process; Alarm module, coordinates the warning function of headend equipment, and the video and audio realized under predetermined alarm condition is recorded; And video and audio general-purpose interface and network data general-purpose interface; Power module, for this master chip disposable plates, this video and audio collection plate and this network data transceiver boards are powered.
Above-mentioned video encoding equipment, wherein said video and audio general-purpose interface comprises: one or more groups video interface, audio interface, control bus interface, interface format option interface, configurable I/O interface, power interface and ground interface.
Above-mentioned video encoding equipment, wherein said external network data interface comprises further: network data interface, power interface, interface and network format option interface.
The invention provides a kind of network system applying video encoding equipment described in above-mentioned any one for solving the problem, described network system comprises multiple described video encoding equipment, by procotol interactive information between each video encoding equipment.
The network system of above-mentioned video encoding equipment, one master control video encoding equipment and at least one master control video encoding equipment for subsequent use are wherein set in those video encoding equipment, when this master control video encoding equipment fault, start this master control video encoding equipment for subsequent use and play master control effect, and report master control video encoding equipment fault, after this master control video encoding equipment recovers, become master control video encoding equipment for subsequent use.
The network system of above-mentioned video encoding equipment, wherein said master control video encoding equipment, for safeguarding each video encoding facility information table in this network system, comprises the numbering of described video encoding equipment and the corresponding relation of IP address in this encoding device information table.
A kind of storage extracting method of video encoding equipment is the invention provides for solving the problem, be applied to the video encoding equipment described in above-mentioned any one, at least one memory device of this video encoding equipment connection, it is characterized in that, the storage extracting method of described video encoding equipment comprises: step 1, video and audio collection plate, by outside video and audio interface, receives various video/audio code stream signal; Step 2, master chip disposable plates is encoded to described video/audio code stream signal, is compressed process, after producing the data code flow after process, directly the data code flow after this process is stored to this memory device; Step 3, client accesses this memory device by network and network data transceiver boards, and calls this data code flow in this memory device.
The storage extracting method of above-mentioned video encoding equipment, wherein in described step 2, also comprises the step of the code stream storage mode that a judgement user selects.
The storage extracting method of above-mentioned video encoding equipment, the storage mode of wherein said code stream comprises time period storage and alert event stores, need when storing with time period storage mode to detect whether within the time period of default storage, if within the time period that this presets storage, then store code stream, otherwise do not store code stream, continue the coding of next frame; Being need to detect the switch alarm information whether had from alarm module with the storage of alert event storage mode, if there is warning message, opens and storing until warning message terminates, otherwise not storing code stream, continuing the coding of next frame.
The storage extracting method of above-mentioned video encoding equipment, wherein when this memory device insufficient space, carries out stopping storage operation or covers storage operation.
The storage extracting method of above-mentioned video encoding equipment, wherein step 3 comprises further: step 301, and client initiates inquiry request to master control video encoding equipment, asks the IP address of the video encoding equipment of a certain numbering; Step 302, the IP address of master control video encoding device replied terminal equipment target video encoding equipment; Step 303, client adjusts back the video and audio of certain period or condition to target video encoding device request by IP address; Step 304, target video encoding equipment returns corresponding code stream.
Compared with prior art, beneficial effect of the present invention is: encoding device can as required, and the data of the multiple video and audio input interface of flexible access, process data, compress, and realizes the transmission of data to network interface or optical fiber port.The encoding device of one or more input interfaces is fixed in contrast, reduces hardware cost, improves the flexibility of use.Adopt the local storage mode storing, adjust back, only have the ability occupied bandwidth when callback data, greatly reduce the requirement of system to bandwidth.Can time-dividing storage be supported, the condition storage mode that alert event stores, improve the utilance of memory device.
Accompanying drawing explanation
Fig. 1 is the structure composition schematic diagram of known technology encoding device;
Fig. 2 is the structure composition schematic diagram of the video encoding equipment in one embodiment of the invention;
Fig. 3 is the video encoding equipment master chip disposable plates structural representation in one embodiment of the invention;
Fig. 4 is the workflow diagram that the video encoding in one embodiment of the invention is established;
Fig. 5 is the client-requested fixed number encoding device flow chart in one embodiment of the invention.
Embodiment
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
As the structure chart that Fig. 1 is encoding device in known technology, it fixes one or more input and output, need the equipment selecting to meet oneself interface requirements when user uses, and user only uses one of them input interface the general same time, this can cause the wasting of resources of all the other interfaces undoubtedly; When user's request interface changes, often need to purchase new encoding device, this is again a kind of waste.
As the structure chart that Fig. 2 is the video encoding equipment in one embodiment of the invention.This video encoding equipment, comprising: at least one video and audio collection plate 201, master chip disposable plates 201 and at least one network data transceiver boards 203.Described video and audio collection plate 201, for by outside video and audio interface, receives various video/audio code stream signal; Described master chip disposable plates 202, connects described video and audio collection plate 201 by a video and audio general-purpose interface 2021, and this master chip disposable plates 202 for encoding to described video/audio code stream signal, compress process, and produces the data code flow after process; Described network data transceiver boards 203, described master chip disposable plates 202 is connected by a network data general-purpose interface 2022, and mutual for by external network data Interface realization and network, to send the packet that the data code flow after described process and reception carry out automatic network to network.
Structure is redesigned with modular thought, the method of fixed interface is replaced by independently plate form, by definition video and audio general-purpose interface, plate can be changed flexibly, as long as change the current change needing the interface board used can realize encoding device during use according to the interface shape of input video and audio.For the network interface of encoding device, by define grid transceiver interface, make network data transceiver boards can be replaced by the transceiver boards of Ethernet interface, optical fiber port or other Access Networks as required.
Video and audio general-purpose interface 2012, generally comprises one or more groups video interface, audio interface, control bus interface, interface format option interface, user configurable I/O, VDD-to-VSS interface.Adoptable one is defined as follows: 4 groups of video input interfaces, and every group interface comprises clock signal, 8 bit parallel data positions, and the 0th, 2 group of video input interface also comprises line synchronizing signal, field sync signal.0,1 group and 2,3 groups of video input interfaces can work individually or simultaneously and realize 1 group or two group of 16 digital video transfer of data; Two-way audio interface; Spi bus interface; I2C bus interface; Video and audio form option interface; User's configurable I/O interface; Power interface and ground interface.
Network transceiver interface, generally comprises network data interface, power interface, ground interface, interface format option interface.Adoptable one is defined as follows: 4 groups of differential pairs to meet 100,000,000, gigabit Ethernet, optical networking demand, network format option interface, power interface and ground interface.
Form option interface can realize configuration by the form of hardware or software, example, in hardware is for do drop-down process at Main Processing Unit place, the video and audio collection plate or network data transceiver boards of correspondence do pull-up process, realizes the identifying of different video and audio collection plate with this.Software form can adopt and send the mode of specifying identifier by I/O mouth, adopts hardware mode to realize in this example.On master chip control board, be divided into multiple common I/O pin according to pattern of the input, and all drop-down; On video and audio collection plate, the pin of corresponding this collection plate form is drawn high; In network data transceiver boards, the pin of corresponding this transceiver boards form is drawn high.
Wherein the implementation of the video and audio collection plate of HD-SDI interface is as follows: the gv7601 adopting gennum company is a signals collecting chip, coordinates peripheral circuit, crystal oscillator to realize the conversion of HD-SDI serial signal to 20BIT parallel data.Because video and audio general in this example takes the bit wide of 16BIT, need give up low data, therefore only transmit 2 ~ 9,12 ~ 19 bit data.Video and audio collection plate utilize gv8500 can carry out local echo to the HD-SDI signal gathered simultaneously.For ensureing the extensibility of collection plate, collection plate uses two panels gv7601, gathers, and just use up 4 groups of video input interfaces of video and audio general-purpose interface while can realizing two-way sdi signal.
All the other collection plates to realize alternate example as follows: USB interface collection plate can adopt AD9883 chip; Bnc interface collection plate can adopt TW2865 chip; HDMI collection plate adopts SIL9033 chip; CVBS, YPbPr, S-video interface can adopt AD7182 chip.As long as the conversion of video interface to parallel video and audio general-purpose interface can be realized, and the example that the satisfied chip consistent with the electrical resistance of the pin on Main Processing Unit chip can design as collection plate.
Wherein the implementation of the network data transceiver boards of gigabit Ethernet is as follows: adopt RTL8211BG as PHY chip, connect RJ45 interface, realize 100,000,000, the adaptive access of gigabit Ethernet.In addition, network data transceiver boards can also adopt the form of optical fiber communication, and OWLink, EPON and SFP are possibilities.Along with the development of 4G technology, when bandwidth allows, TD-LTE, WiMax can as the implementations of network data transceiver boards in the present invention.
If Fig. 3 is in one embodiment of the invention, the structure chart of master chip disposable plates.Comprise power module 301, JTAG simulation debugging module 302, memory module 303, data processing module 304, RS232/485 module 305, alarm module 306, video and audio general-purpose interface 307, network universal data interface 308.
Power module 301 is that whole master chip disposable plates 202 and the video and audio collection plate 201 be connected with disposable plates and network data transceiver boards 203 are powered.Connect the power supply of 5V, 2A, and voltage is changed.
JTAG simulation debugging module 302 mainly downloads, debugging routine uses, and J-link can be coordinated to realize the real-time debug of program.
RS232/485 module 305 provides standard 232/485 communication protocol interface, can dock The Cloud Terrace and realize the control of encoding device to The Cloud Terrace.
Memory module 303 is total interfaces of a various memory, and this interface is by data/address bus, and control bus and DDR memory modules, Norflash module, NandFlash module, memory device connect.Toggle switch is that the heel piece connected in the control bus of memory module and Norflash module, NandFlash module selects holding wire.If during toggle switch conducting, be then started by Norflash pattern; If when toggle switch disconnects, be then started by Nandflash pattern.Data in Norflash module, NandFlash module are all to data processing module by data bus transmission.Memory device is the container of the encoded stream of memory encoding equipment, and size can be changed.Video encoding equipment supports two kinds of Starting mode, pattern one, the chip selection signal of NorFlash module is selected to start NorFlash pattern by toggle switch, the advantage of this pattern is that routine data read or write speed is fast, shortcoming is that capacity is less, if it is less that the program of User Exploitation takies resource, this start-up mode can be selected.Pattern two selects the chip selection signal of NandFlash module to start NandFlash pattern by toggle switch, and the maximum advantage of this pattern is that memory capacity is very large, and user can the powerful program of development function, and shortcoming is that routine data read or write speed is slower.User can configure suitable program start-up mode as required.
For user, a time period of general hope or an event are stored as a file; For equipment to the management stored, general hope stores code stream with fixing file size.Present invention employs a kind of mode of compromise, the Single document size of fixed storage is 300M, and each file internal is divided into the data segment do not waited, data segment comprises paragraph header information, segment data.Wherein paragraph header information comprises: the time of advent of stream mode, video size, frame per second, key frame interval, segment length, initial data, event type.Owing to adopting this kind of storage mode, encoding device can provide two kinds of retrieval modes, according to fact retrieval or according to fact retrieval.
Alarm module is can the I/O pin of receiving key amount.Coordinate the warning function of front monitoring front-end, the video and audio recording function under predetermined alarm condition can be realized.Alarm module, as a kind of special input, informs the generation of some situation of video encoding equipment, as exceeded the speed limit, fighting.
Data processing module 304 is main process chip of responsible video and audio compress coding, local storage, long-range playback, the transmission of compressed bit stream network.It can be special video and audio compress chip, as the special DSP of Hi3520, Hi3531 or Ti company is thought in sea.The disposal ability of data processing module, determines the send mode that video encoding equipment can access the type of video and audio collection plate, way and network transmission board.Maximum operating frequency as Hi3515 chip can reach 600MHz, support H.264, JPEG decoding process, support the data decode of the video decode of 8 road D1 forms or full HD+1 road D1 of 1 road 1080P simultaneously; Hi3517 chip then function is more powerful.Owing to not having the chip type of restricting data processing module, guaranteeing and video and audio general-purpose interface, when the electrical characteristic of network general-purpose interface can be docked, main processor board can upgrading, strengthens the disposal ability of video encoding equipment.
As Fig. 4, for the video encoding in one embodiment of the invention establish by workflow diagram.After system electrification, routine executing step is as follows:
1. identify video and audio collection plate by form option interface, correct configuration, initialization video and audio collection plate, and select corresponding coded format.
2. carry out recognition network data transmit-receive plate by form option interface, correct configuration, initialization network data transceiver boards.
3. data processing module receives the data from video and audio general-purpose interface, starts coding.
4. judge the code stream storage mode that user selects, optional storage mode has according to time period storage and stores according to the event of reporting to the police at present.
A) if the form stored on a time period.Need detect whether within the time period that need store, if, store code stream, otherwise do not store code stream, continue the coding of next frame.
B) if the form stored by the event of reporting to the police.The switch alarm information whether had from alarm module need be detected, if had, open and store until warning message terminates, otherwise do not store code stream, continue the coding of next frame.
5. store the coding of complete continuation next frame.
When multiple encoding device is in same sub-network, just define a coded system.In this coded system, by procotol interactive information between each encoding device, one of them encoding device, as master control video encoding equipment, safeguards encoding device information table, comprises encoding device numbering and IP address corresponding relation in table.For ensureing master control video encoding functions of the equipments, master control video encoding equipment for subsequent use is set, both synchronizing information, guard mutually, during the equipment fault of master control video encoding, master control video encoding equipment for subsequent use plays master control effect, and reports master control video encoding equipment fault, master control video encoding equipment becomes master control video encoding equipment for subsequent use, both co-ordinations after recovering.
The present invention also discloses a kind of storage extracting method of video encoding equipment, is applied to above-mentioned video encoding equipment, and at least one memory device of this video encoding equipment connection, the method comprises the steps:
Step 1, video and audio collection plate, by outside video and audio interface, receives various video/audio code stream signal;
Step 2, master chip disposable plates judges the code stream storage mode that user selects, and encodes to described video/audio code stream signal, compress process, after producing the data code flow after process, directly the data code flow after this process is stored to this memory device;
Step 3, client accesses this memory device by network and network data transceiver boards, and calls this data code flow in this memory device.Data in the concrete memory device of client-access in one embodiment comprise: 1. client initiates inquiry request to master control video encoding equipment, asks the IP address of the encoding device of a certain numbering.2. the IP address of master control video encoding device replied client objectives encoding device.3. client adjusts back the video and audio of certain period or condition to target code device request by IP address.4. subject encoder returns corresponding code stream, as shown in Figure 5.When this memory device insufficient space, carry out stopping storage operation or cover storage operation.
The present invention proposes a kind of can the video encoding equipment of flexible configuration, can according to use needs, by changing corresponding video and audio collection plate, network data transceiver boards or master chip disposable plates realize flexible configuration, meet the conversion of various video and audio interface signal to network.And devise this locality storage that rational storage policy realizes video/audio code stream, long-range callback function.The present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the present invention.
The present invention is a kind of flexible configurable video encoding equipment, system and storage extracting method thereof.In the method, encoding device comprises video and audio collection plate, master chip disposable plates, network data transceiver boards.Video and audio collection plate realizes the sampling of standard video/audio code stream, conversion, data access master chip disposable plates; Master chip disposable plates comprises video and audio general-purpose interface, JTAG debugging emulation module, power module, serial general-purpose interface (RS232/485) module, memory module, alarm module, network general-purpose interface, is responsible for encoding to video/audio signal, compressing process; Network data transceiver boards, is responsible for receiving the data that master chip disposable plates sends, and realizes data and send, the data access master chip disposable plates of network transmission to the code stream of network interface or optical fiber port.Any standard video/audio code stream all can use corresponding video and audio collection plate to realize the access of code stream to master chip processing module, compression, and is implemented to the code stream transmission of the network such as network interface, optical fiber port by network data transceiver boards.
Video and audio collection plate is connected with master chip disposable plates by video and audio general-purpose interface; Data transmission board is connected with master chip disposable plates by network general-purpose interface.According to different input video and audio interfaces, as BNC, HD-SDI, VGA etc., video and audio collection plate can flexible configuration be changed; According to different compression methods, data-handling capacity requirement, as H.264, JPEG, H.265 coded system, 1/2/4/8 road video code flow etc., master chip disposable plates can flexible configuration be changed; According to the difference of access network interface, as network interface, optical fiber port, network data transceiver boards can flexible configuration be changed.
Master chip disposable plates external storage equipment, supports the timing video recording of video/audio code stream, local storage, playback function.When the multiple encoding device of concentrated use, there is a master control video encoding outfit of equipment to manage all encoding devices, provide encoding device to number and inquire about with IP corresponding relation, encoding device status poll.
Claims (13)
1. a video encoding equipment, is characterized in that, comprising:
At least one video and audio collection plate, for by outside video and audio interface, receives various video/audio code stream signal;
Master chip disposable plates, connects described video and audio collection plate by a video and audio general-purpose interface, and this master chip disposable plates is used for encoding to described video/audio code stream signal, compressing process, and produces the data code flow after process; And
At least one network data transceiver boards, described master chip disposable plates is connected by a network data general-purpose interface, and mutual for by external network data Interface realization and network, to send the packet that the data code flow after described process and reception carry out automatic network to network.
2. video encoding equipment according to claim 1, is characterized in that, described video and audio collection plate, master chip disposable plates and network data transceiver boards connect with modularization inserting mode with flexible configuration.
3. video encoding equipment according to claim 1, is characterized in that, described master chip disposable plates comprises:
Data processing module, for the process to video/audio;
RS232/485 module, docks The Cloud Terrace for providing standard 232/485 communication protocol interface and realizes the control of video encoding equipment to The Cloud Terrace;
Memory module, connects at least one external storage device, for storing the data code flow after described process;
Alarm module, coordinates the warning function of headend equipment, and the video and audio realized under predetermined alarm condition is recorded; And
Video and audio general-purpose interface and network data general-purpose interface;
Power module, for this master chip disposable plates, this video and audio collection plate and this network data transceiver boards are powered.
4. video encoding equipment according to claim 1, it is characterized in that, described video and audio general-purpose interface comprises: one or more groups video interface, audio interface, control bus interface, interface format option interface, configurable I/O interface, power interface and ground interface.
5. video encoding equipment according to claim 1, is characterized in that, described external network data interface comprises further: network data interface, power interface, interface and network format option interface.
6. apply a network system for the video encoding equipment described in any one of the claims 1-5, it is characterized in that, described network system comprises multiple described video encoding equipment, by procotol interactive information between each video encoding equipment.
7. the network system of video encoding equipment according to claim 6, it is characterized in that, one master control video encoding equipment and at least one master control video encoding equipment for subsequent use are set in those video encoding equipment, when this master control video encoding equipment fault, start this master control video encoding equipment for subsequent use and play master control effect, and report master control video encoding equipment fault, after this master control video encoding equipment recovers, become master control video encoding equipment for subsequent use.
8. the network system of video encoding equipment according to claim 6, it is characterized in that, described master control video encoding equipment, for safeguarding each video encoding facility information table in this network system, comprises the numbering of described video encoding equipment and the corresponding relation of IP address in this encoding device information table.
9. the storage extracting method of a video encoding equipment, be applied to the video encoding equipment described in any one of claim 1-8, at least one memory device of this video encoding equipment connection, is characterized in that, the storage extracting method of described video encoding equipment comprises:
Step 1, video and audio collection plate, by outside video and audio interface, receives various video/audio code stream signal;
Step 2, master chip disposable plates is encoded to described video/audio code stream signal, is compressed process, after producing the data code flow after process, directly the data code flow after this process is stored to this memory device;
Step 3, client accesses this memory device by network and network data transceiver boards, and calls this data code flow in this memory device.
10. the storage extracting method of video encoding equipment according to claim 9, is characterized in that, in described step 2, also comprises the step of the code stream storage mode that a judgement user selects.
The storage extracting method of 11. video encoding equipment according to claim 10, it is characterized in that, the storage mode of described code stream comprises time period storage and alert event stores, need when storing with time period storage mode to detect whether within the time period of default storage, if within the time period that this presets storage, then store code stream, otherwise do not store code stream, continue the coding of next frame; Being need to detect the switch alarm information whether had from alarm module with the storage of alert event storage mode, if there is warning message, opens and storing until warning message terminates, otherwise not storing code stream, continuing the coding of next frame.
The storage method of 12. video encoding equipment according to claim 9, is characterized in that, when this memory device insufficient space, carries out stopping storage operation or covers storage operation.
The storage method of 13. video encoding equipment according to claim 9, it is characterized in that, step 3 comprises further:
Step 301, client initiates inquiry request to master control video encoding equipment, asks the IP address of the video encoding equipment of a certain numbering;
Step 302, the IP address of master control video encoding device replied terminal equipment target video encoding equipment;
Step 303, client adjusts back the video and audio of certain period or condition to target video encoding device request by IP address;
Step 304, target video encoding equipment returns corresponding code stream.
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