CN106534808A - Video monitoring method and apparatus based on virtual cameras - Google Patents
Video monitoring method and apparatus based on virtual cameras Download PDFInfo
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- CN106534808A CN106534808A CN201611233270.2A CN201611233270A CN106534808A CN 106534808 A CN106534808 A CN 106534808A CN 201611233270 A CN201611233270 A CN 201611233270A CN 106534808 A CN106534808 A CN 106534808A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
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Abstract
The invention discloses a video monitoring method and apparatus based on virtual cameras, applied to a video monitoring system. The method comprises the following steps: receiving basic stream video data from the camera, and virtualizing a predetermined number of virtual cameras; receiving a code stream request from a video terminal, and allocating the virtual camera to the received code stream request to serve as a stream sending end of the video terminal; sending the basic stream video data to the stream sending end, packaging the basic stream video data of the stream sending end according to a code stream package mode corresponding to the code stream request, and sending the packaged basic stream video data to the corresponding video terminal. By adoption of the video monitoring method and apparatus disclosed by the invention, the shared use of the camera is achieved, thereby greatly reducing the deployment number of physical cameras and improving the monitoring utilization rate of the cameras, only a plurality of virtual cameras are configured to be compatible with different platforms, and the cameras only need to send encoded basic streams, so that the performance requirements for the cameras are greatly reduced, and the investment cost of the cameras is reduced.
Description
Technical field
The invention belongs to technical field of video monitoring, and in particular to a kind of video frequency monitoring method based on virtual video camera and
Device.
Background technology
Video monitoring system is the important component part of safety and protection system, and which is widely used in various places and (for example makees
Industry place, office space, public place of entertainment, family etc.) security monitoring.Under prior art conditions, video monitoring system is usual
By monitoring device end (i.e. photographic head), and monitor terminal (i.e. video terminal) constitute.
To same scene monitoring, because the monitor supervision platform of department at different levels (i.e. video terminal) docking mode is different, institute is simultaneous
The agreement of appearance is different, because in order to each video terminal can be normally carried out monitoring, needs are deployed according to video terminal
Compatible agreement the video camera of corresponding quantity is set causes to meet the requirement for requiring each video terminal, thus and take the photograph
The deployment redundancy of camera, monitoring cost are high.
For solving the problems, such as video camera deployment redundancy, high cost, it is proposed that a kind of method for enabling many code streams to video camera,
The network video device (comprising web camera or video encoder) of front end is supported to generate multiple video code flows simultaneously, these
Video code flow is completely independent configuration, can be respectively fast, the different compression ratio of different resolution, different frames or
Different coded systems (H.264, MPEG-4 or MJPEG etc.), to meet different network access requirements.
It is compatible different monitoring platform so by a video camera, and efficiently solves deployment redundancy issue.Due to
Output multi-channel code stream, very high to the performance requirement of video camera simultaneously, directly results in equipment cost increase.
The content of the invention
For the deficiencies in the prior art, the invention provides a kind of video frequency monitoring method and dress based on virtual video camera
Put, in many video monitoring systems of energy effectively solving, video camera disposes the problem of redundancy.
To achieve these goals, technical solution of the present invention is as follows：
A kind of video frequency monitoring method based on virtual video camera, is applied to video monitoring system, the video monitoring system
Including video camera, and to the video terminal of video camera request video flowing, the video monitoring based on virtual video camera
Method, including：
The basic flow video data from video camera is received, the virtual video camera of predetermined quantity is fictionalized；
The code stream request from video terminal is received, and the code stream request for receiving distributes virtual video camera as this
Corresponding stream end of video terminal；
Basic flow video data is sent to described stream end, corresponding code stream encapsulation format is asked by described according to code stream
Corresponding video terminal is sent to after the basic flow video data encapsulation that stream end receives.
The video monitoring system of the present invention refers to multiple video terminals while monitoring same application scenarios, based on the present invention's
Method only needs to arrange a video camera (physics video camera) for the scene of monitoring.
It should be noted that code stream request carries the tunneling that video terminal asks code stream, it is right to need after receiving
The code stream request is parsed, and basic flow video data is packaged into corresponding form according to analysis result then.So, pass through
Multiple virtual video cameras are set, each video terminal is docked with virtual video camera, you can reach a physics video camera compatible
The purpose of different agreements.
Preferably, the video frequency monitoring method based on virtual video camera, each for also including for fictionalizing virtually is taken the photograph
Camera arranges corresponding virtual VLAN；
The video frequency monitoring method based on virtual video camera, also includes：
Safeguard virtual video camera service condition table, the virtual video camera service condition table include virtual video camera numbering,
The corresponding VLAN of virtual video camera, virtual video camera IP, compatible platform agreement and service condition.
Independent one IP address of correspondence of each virtual video camera fictionalized in the present invention, and by for each virtual shooting
Machine correspondence fictionalize a virtual VLAN make it is mutually isolated between the virtual video camera.
Conveniently, the video frequency monitoring method based on virtual video camera, also includes：
Media stream table is safeguarded, the media stream table includes virtual video camera numbering, code stream encapsulation format, purpose
Port, source port, purpose IP and source IP.
Preferably, the described video frequency monitoring method based on virtual video camera, also including each virtual video camera of setting
Priority；
The code stream request distribution virtual video camera for receiving includes as corresponding stream end of the video terminal：Root
Make according to code stream request distribution virtual video camera of the priority of virtual video camera for receiving from unappropriated virtual video camera
For sending out stream end.
Further preferably, when the video camera is monopod video camera, the video monitoring side based on virtual video camera
Method, also includes：
The control instruction for controlling monopod video camera that video terminal is sent to corresponding virtual video camera is received, according to
The priority of the corresponding virtual video camera of video terminal, it is allowed to which the corresponding video terminal of the high virtual video camera of priority is to head
Video camera is controlled.
Present invention also offers a kind of video monitoring apparatus based on virtual video camera, are applied to video monitoring system, institute
Stating video monitoring system includes video camera, and asks the video terminal of video flowing to the video camera, described based on virtually taking the photograph
The frequency supervising device of camera, including：
Virtualization unit, for receiving the basic flow video data from video camera, fictionalizes virtually taking the photograph for predetermined quantity
Camera；
Requesting processing, the code stream for receiving from video terminal are asked, and the code stream request point for receiving
With virtual video camera as corresponding stream end of the video terminal；
Code stream encapsulation unit, for receiving the basic flow video data that the virtualization unit is sent to described stream end,
Corresponding code stream encapsulation format is asked to be sent to phase after the basic flow video data that described stream end receives is encapsulated according to code stream
The video terminal answered.
Preferably, the virtualization unit is additionally operable to each virtual video camera for fictionalizing arranges corresponding virtual
VLAN,
The video monitoring apparatus based on virtual video camera, also including form maintenance unit, for safeguarding virtual shooting
Machine service condition table,
The virtual video camera service condition table includes virtual video camera numbering, the corresponding VLAN of virtual video camera, virtual
Video camera IP, compatible platform agreement and service condition.
Further preferably, the form maintenance unit, is additionally operable to safeguard media stream table；
The media stream table includes virtual video camera numbering, code stream encapsulation format, destination interface, source port, purpose
IP and source IP.
Preferably, described virtualization unit is additionally operable to set the priority of each virtual video camera；
Described requesting processing is reception according to the priority of virtual video camera from unappropriated virtual video camera
The code stream request distribution virtual video camera for arriving flows end as sending out.
Further preferably, when the video camera is monopod video camera, the video monitoring based on virtual video camera is filled
Put, also including cradle head control unit, take the photograph for controlling head to what corresponding virtual video camera sent for receiving video terminal
The control instruction of camera, and according to the priority of the corresponding virtual video camera of video terminal, it is allowed to the high virtual shooting of priority
The corresponding video terminal of machine is controlled to monopod video camera.
Compared with prior art, present invention achieves the shared use of video camera, greatly reduces the deployment of physics video camera
Quantity, improves the monitoring utilization rate of video camera, is compatible different platform, it is only necessary to distribute the docking of multiple stage virtual camera, and
Video camera only needs to the basic flow after sending coding, and the performance requirement of video camera is reduced, the cost of investment of video camera is reduced.
Description of the drawings
Structural representations of the Fig. 1 for the video monitoring system of the embodiment of the present invention；
Flow chart of Fig. 2 positions present invention based on the video frequency monitoring method of virtual video camera；
Fig. 3 is reception schematic diagram of the present invention based on the video monitoring apparatus of virtual video camera.
Specific embodiment
In order to be better understood from the present invention, the side of the present invention is expanded on further below in conjunction with specific embodiments and the drawings
Case, but present disclosure is not limited solely to the following examples.
The present embodiment is described in detail by taking the video monitoring system shown in Fig. 1 as an example, and the video monitoring system includes
Video camera, and the video terminal of video flowing is asked to the video camera, in the present embodiment, video terminal includes company A, company
B ... ..., company X.Video camera connection switch in Fig. 1, each video terminal is by network connection switch, camera acquisition prison
Control the video image of scene and carry out coding and obtain corresponding basic flow video data, basic flow video data does not enter row format
Encapsulation, and the basic flow video data is sent to into switch, switch is used for fictionalizing virtual video camera and video terminal pair
Connect, and basic flow video data is carried out being copied to each virtual video camera, and it is right after the code stream for receiving video terminal is asked
The basic flow video data of respective virtual video camera is packaged, and the code stream after encapsulation is sent to corresponding video terminal.
In the present embodiment, video terminal is monitor terminal, can be the equipment such as PC, server, positioned at company A, public
Department B ... ..., company X.
Video camera shoot video image, by encoder be encoded to transmitting stream TS stream or PS stream, then plus for
The network message such as UDP/TCP/RTP transmitted in IP network header information so as on network with the data flow of network message form
It is transmitted.Basic flow video data (Elementary Stream) in the present embodiment is mainly based upon and gets rid of UDP/
Data flow after the header informations such as TCP/RTP, TS/PS/ONVIF, also referred to as naked code stream.
As shown in Fig. 2 the video frequency monitoring method based on virtual video camera of the present embodiment, specifically includes following steps：
(S1) video image of camera acquisition monitoring scene carry out coding and obtain corresponding basic flow video data, and
The basic flow video data is sent to into switch；
Video camera sends basic flow video data has two ways to switch：
Mode one：Video camera actively sends multicast data flow in the form of M-VLAN to switch；
Mode two：Switch proactive notification video camera, video camera are received basic flow video data after the notice with multicast
The form of VLAN sends multicast data flow to switch.In whole video monitoring system, each equipment has the network address of oneself.
In the present embodiment, video camera transmission multicast data flow is as shown in table 1 to the data form of switch, using switch as purpose, to image
As source, wherein purpose MAC and source IP, machine refers to that MAC Address and the IP address of switch, source MAC and source IP refer to shooting respectively respectively
The MAC Address of machine and IP address.
Table 1
(S2) switch fictionalizes the virtual video camera of predetermined quantity after receiving basic stream video data；
As a kind of implementation, the virtual video camera of predetermined quantity is fictionalized, wherein predetermined quantity can be in switch
Arrange when dispatching from the factory, or set from user to switch input before virtualization, the concrete value of the predetermined quantity can be according to reality
Service condition sets, and can meet application demand, the quantity without video terminal in other particular/special requirements, with video monitoring system
It is unrelated.And the virtual video camera for fictionalizing in this case and video terminal are without corresponding relation.
For ensureing safety and reliability, each virtual video camera for fictionalizing is all to having virtual VLAN, virtual camera
Corresponding virtual VLAN can accordingly be generated when generation, while also one IP address of independent correspondence, each virtual video camera it
Between be isolated from each other and be independent of each other；And the video camera fictionalized per platform takes a physical resource of switch, can be with compatible different
Platform.
Used as another kind of implementation, the predetermined quantity of virtual video camera is equal to video in system (i.e. video monitoring system)
The quantity of terminal, that is, fictionalize corresponding virtual video camera conduct respectively for each video terminal when fictionalizing virtual video camera
It is corresponding to send out stream end.And there is one-to-one relationship with video terminal in the virtual video camera for fictionalizing in this case.
When actually realizing, fictionalize virtual video camera and be also set with priority, for avoiding conflict, any two from virtually imaging
The priority of machine must be different.When priority is set, subsequently when virtual video camera is distributed for video terminal, according to preferential
Level is distributing；If not setting priority, subsequently when virtual video camera is distributed for video terminal, can be according to virtual video camera
Numbering or title sequence distributing.
The priority of each virtual video camera can set at random and can also be referred to according to certain strategy according to application demand
It is fixed.Generally, when the virtual video camera that fictionalizes with video terminal without corresponding relation when, the priority of each virtual video camera can be with
It is random to set；When the virtual video camera for fictionalizing is with video terminal one-to-one relationship, can be according to certain strategy setting, example
Such as, set according to the identity of corresponding video terminal, for example, can be set according to the user identity of video terminal：In two videos
When the user of terminal is respectively provincial and city-level, then with the priority of the corresponding virtual video camera of provincial video terminal higher than city-level
The corresponding virtual video camera of video terminal.
Priority can adopt various method for expressing, such as English alphabet, numeral etc., the even character of self-defining.For
Facilitate implementation, using numeral expression in the present embodiment, directly each virtual video camera is carried out using numeral volume according to priority
Number, numbering is less, then priority is higher.
During practical application, exchange opportunity safeguards a virtual video camera priority level table, records the power of each virtual video camera
Limit rank (i.e. priority) as shown in table 2, including virtual video camera numbering, the corresponding VLAN of virtual video camera, virtual camera IP,
Service condition and Permission Levels.
Table 2
During whole monitoring, the quantity of virtual video camera can remain unchanged, it is also possible to dynamic change.
For the utilization system resource of maximum possible, dynamic change scheme is adopted in the present embodiment, each virtual shooting is recorded
The service condition of machine, when implementing, the service condition of monitor in real time each virtual video camera is (idle or using two kinds of uses
Situation), the quantity of virtual video camera is adjusted according to service condition.If free time exceedes default time threshold, release should
The system resource that virtual video camera takes.Actual being understood to of the system resource of release virtual video camera deletes the virtual shooting
Machine, the system resource of release can be used for realizing other operations.
It should be noted that free time refers to continuous free time, it is if switch to service condition by idle condition, idle
Time needs reclocking after zero；The value of default time threshold can be set according to practical application request without particular/special requirement.
For ensureing control real-time, switch has also safeguarded virtual video camera service condition table, the service condition table record
There is the letter such as virtual video camera numbering, the corresponding VLAN of virtual video camera, virtual video camera IP, compatible platform agreement and service condition
Breath, it is concrete as shown in table 3.Whenever the service condition for monitoring virtual video camera changes, just in time to virtual video camera
Corresponding contents in service condition table are updated, and such that it is able to monitor the service condition of each virtual video camera, also allow for moving
State adjusts virtual video camera.
Table 3
(S3) video terminal sends code stream request to switch according to their needs, and switch is received from video terminal
Code stream request after, be the code stream request distribution virtual video camera that receives as corresponding of video terminal stream end；
Switch is the virtual shooting of code stream request distribution for receiving according to the priority and use state of virtual video camera
Machine, selects the virtual video camera of untapped highest priority to be assigned as code stream request every time.
When implementing, by inquiring about virtual video camera service condition table, select from the virtual video camera service condition table
In one and number the virtual video camera X of minimum not using, send out stream end as this session.
The tunneling of request code stream, the address of video terminal itself is carried in the request of video terminal transmitted stream
(IP address, port numbers) etc..After switch receives the code stream request, it is necessary first to the code stream request is parsed, is extracted
Go out relevant information, such as the tunneling of request code stream, address (IP address, port numbers) of corresponding video terminal etc., and according to
The tunneling of request code stream determines the code stream form of video terminal request, according to being elected to be the address and video terminal of sending out stream end
Address determines the address of the transmitting-receiving Media Stream of the request and port numbers.
Switch is code stream request distribution virtual video camera, actually by the virtual video camera and corresponding video terminal
Network interconnection (by setting respective purpose IP, source IP and destination interface and source port etc.) is carried out, enables the two mutual
Carry out information exchange.
After determining code stream form, receiving and dispatching address and the port numbers of Media Stream each other, sending out a stream end can according to corresponding port
And address list item, media stream is gone out (carry out information exchange), in order to ensure the correct encapsulation and transmission of data, is exchanged
Machine safeguards media stream table, to record the address and port numbers that receive Media Stream (including destination interface, source port, purpose IP
With source IP), code stream encapsulation format and corresponding as the virtual video camera numbering for sending out stream end, it is concrete as shown in table 4.
Table 4
(S4) to stream end transmission basic flow video data is sent out, corresponding code stream encapsulation format is asked to send out stream end according to code stream
Corresponding video terminal is sent to after the basic flow video data encapsulation of reception.
When actually realizing, switch receives the basic flow video data from video camera, and flows the virtual of end to as sending out
Video camera sends basic flow video data.
Specifically, basic flow video data is sent to as the virtual video camera for sending out stream end：
Only basic flow video data can be sent, or to virtual to the virtual video camera for being allocated as sending out stream end
Each virtual video camera for going out sends basic flow video data.In view of the system money for sending the consumption of basic flow video data
Source, preferably only can send basic flow video data to the virtual video camera for being allocated as sending out stream end.
The tunneling (code stream encapsulation format) of request code stream, asking according to different video terminal is carried in code stream request
Ask the tunneling of code stream that basic flow video data is packaged into different forms.For example, for the video end corresponding to company A
The basic flow video data of correspondence virtual video camera is packaged into UDP+PS code stream forms, for the video corresponding to company B by end
The basic flow video data of correspondence virtual video camera is packaged into UDP+TS code streams, for the video end corresponding to company X by terminal
The basic flow video data of correspondence virtual video camera is packaged into TCP+TS code streams by end.
Further, when basic flow video data is sent to video terminal by switch, first to transmitted stream host-host protocol
Detected, if udp protocol code stream, then just directly transmit away, will not be cached；If Transmission Control Protocol code stream,
So send out flow module the message temporary cache that sends out to be emptied caching after the confirmation message for receiving opposite end again, be confiscated
Confirmation message, can be resend at regular intervals, to ensure that data completely can be reached.
As can be seen that the present embodiment is broadly divided into two based on many video terminal video frequency monitoring methods of virtual video camera
Part, Part I are that switch fictionalizes virtual video camera (including step S1), and Part II is the monitoring of virtual video camera
Business procession (including step S2～S4).
The video frequency monitoring method of the present embodiment, when front end is monopod video camera, also including reception video terminal to correspondence
The control instruction for controlling monopod video camera that sends of virtual video camera, and according to the corresponding virtual video camera of video terminal
Priority, it is allowed to the corresponding video terminal of the high virtual video camera of priority is controlled to monopod video camera.
Control to camera pan-tilt, needs the Permission Levels situation operation according to virtual video camera setting.It is virtual to image
Machine when virtual generation can be numbered the size of distribution authority successively, number little virtual video camera according to virtual video camera,
Authority is bigger.
Control instruction is issued to video camera, there are following three kinds of situations：
Situation one：Receive from video terminal to the virtual video camera transmission for connecting for controlling monopod video camera
During control instruction, and the high control of camera pan-tilt (i.e. head) control instruction is being received by priority ratio just virtual video camera
System, now, the big virtual video camera of authority can not seize control, and after current control terminates, (head stops operation time-out one
Fix time, the time can adjust, set according to actual needs)), by the virtual video camera machine root received in control instruction
Head is operated according to the control instruction for receiving；
Situation two：Receive from video terminal to the virtual video camera transmission for connecting for controlling monopod video camera
During control instruction, and head is just by the control that the priority ratio virtual video camera is low, and now, the big virtual video camera of authority can be with
Control is seized, i.e., is directly referred to according to the control for receiving by the virtual video camera machine for receiving highest priority in control instruction
Order is operated to head；
Situation three：Received from different video terminal simultaneously to the virtual video camera transmission for connecting for controlling head
The control instruction of video camera, and when head is not controlled processed, the virtual video camera of highest priority refers to according to the control for receiving
Order is operated to head；And when head is controlled, the priority for being controlled the virtual video camera of head is connect with all
The priority for receiving the virtual video camera of control instruction is compared, and is subsequently grasped according to situation one and two according to comparative result
Make.
For example：
Current head is controlled by the virtual video camera that priority is 3：
If a () only receives a control instruction：
When the priority of the corresponding virtual video camera of video terminal for sending the control instruction is 2, then directly by priority
The virtual video camera control head that priority is 3 is taken over for 2；
When the priority of the corresponding virtual video camera of video terminal for sending the control instruction is 4, then continue by priority
For 3 virtual video camera control head, the void that priority is 3 is taken over by the virtual video camera that priority is 2 again up to after terminating
Intend camera control head；
If b () receives two control instructions：
When the priority of corresponding two virtual video cameras of video terminal for sending two control instructions is respectively 2 and 4,
The virtual video camera control head that priority is 3 is taken over by the virtual video camera that priority is 2 directly then；
When send control instruction corresponding two virtual video cameras of video terminal priority be respectively 4 and 5 when, then after
It is continuous that head is controlled by the virtual video camera that priority is 3, until being taken over preferentially by the virtual video camera that priority is 4 after terminating again
Level controls head for 3 virtual video camera.
If switch receives 2 control instructions simultaneously, and two control instructions send the video of the control instruction respectively
The priority of the corresponding virtual video camera of terminal is 2
It should be noted that after the system resource for having virtual video camera is released (i.e. the virtual video camera is deleted),
The priority number of remaining virtual video camera is constant, and it is to delete that such as priority is 2 virtual video camera, and corresponding priority is
The priority of 3 virtual video camera remains as 3.
Corresponding to said method, the present embodiment also proposed a kind of video monitoring apparatus based on virtual video camera, application
In video monitoring system as shown in Figure 1, corresponding to the switch described in said method, i.e., in the above-mentioned methods with switch
As a example by illustrating.The device can be special specific installation, it is also possible to be integrated between video terminal and video camera
The network equipment on, such as it is integrated in a switch or to be integrated in the encoder or network hard disk video recorder being connected with video camera
On NVR.
The video monitoring apparatus based on virtual video camera of the present embodiment as shown in figure 3, including：
Virtualization unit, for receiving the basic flow video data from video camera, fictionalizes virtually taking the photograph for predetermined quantity
Camera；
Requesting processing, the code stream for receiving from video terminal are asked, and the code stream request point for receiving
With virtual video camera as corresponding stream end of the video terminal；
Code stream encapsulation unit, sends basic flow video data for receiving virtualization unit to described stream end, according to code
It is sent to after the basic flow video data encapsulation that described stream end is received by the corresponding code stream encapsulation format of stream request and regards accordingly
Frequency terminal.
Wherein, virtualization unit is additionally operable to each virtual video camera for fictionalizing and arranges corresponding virtual VLAN.
When implementing, video monitoring apparatus also include form maintenance unit, for safeguarding virtual video camera service condition
Table and media stream table.Virtual video camera service condition table to check or dynamic adjustment virtual video camera, media stream
Table can ensure that the correct encapsulation and transmission of data.
Further, in the video monitoring apparatus of the present embodiment, virtualization unit is additionally operable to set the excellent of each virtual video camera
First level；
Requesting processing is the code for receiving from unappropriated virtual video camera according to the priority of virtual video camera
Stream request distribution virtual video camera flows end as sending out.
Further, when video camera is monopod video camera, the video monitoring apparatus based on virtual video camera also include head
Control unit, refers to the control for controlling monopod video camera that corresponding virtual video camera sends for receiving video terminal
Order, and according to the priority of the corresponding virtual video camera of video terminal, it is allowed to the corresponding video of the high virtual video camera of priority
Terminal-pair monopod video camera is controlled.
Video monitoring apparatus of the present embodiment based on virtual video camera, when video monitoring is carried out according to the present embodiment Fig. 2
Shown video frequency monitoring method.
It should be noted that the video camera of the present embodiment, the image for acquisition monitoring scene coding obtain corresponding
Basic flow video data, and basic flow video data is sent in the form of M-VLAN.Send basic in the way of M-VLAN
Stream video data can effectively reduce the occupancy of bandwidth to switch.
Obviously, those skilled in the art can carry out the essence of various changes and modification without deviating from the present invention to the present invention
God and scope.So, if these modifications of the present invention and modification belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising these changes and modification.
Claims (10)
1. a kind of video frequency monitoring method based on virtual video camera, is applied to video monitoring system, the video monitoring system bag
Include video camera, and ask the video terminal of video flowing to the video camera, it is characterised in that be described based on virtual video camera
Video frequency monitoring method, including：
The basic flow video data from video camera is received, the virtual video camera of predetermined quantity is fictionalized；
The code stream request from video terminal is received, and the code stream request for receiving distributes virtual video camera as the video
Corresponding stream end of terminal；
Basic flow video data is sent to described stream end, corresponding code stream encapsulation format is asked according to code stream, described is flowed
Corresponding video terminal is sent to after the basic flow video data encapsulation that end receives.
2. the video frequency monitoring method based on virtual video camera as claimed in claim 1, it is characterised in that described based on virtually taking the photograph
The video frequency monitoring method of camera, also includes：
Each virtual video camera for fictionalizing arranges corresponding virtual VLAN；
Safeguard virtual video camera service condition table, the virtual video camera service condition table includes virtual video camera numbering, virtual
The corresponding VLAN of video camera, virtual video camera IP, compatible platform agreement and service condition.
3. the video frequency monitoring method based on virtual video camera as claimed in claim 2, it is characterised in that described based on virtually taking the photograph
The video frequency monitoring method of camera, also includes：
Media stream table is safeguarded, the media stream table includes virtual video camera numbering, code stream encapsulation format, destination
Mouth, source port, purpose IP and source IP.
4. the video frequency monitoring method based on virtual video camera as claimed in claim 1, it is characterised in that described based on virtually taking the photograph
The video frequency monitoring method of camera, also includes：
Set the priority of each virtual video camera；
The code stream request distribution virtual video camera for receiving flows end for corresponding as the video terminal, including：
It is that the code stream request distribution for receiving virtually is taken the photograph from unappropriated virtual video camera according to the priority of virtual video camera
Camera flows end as sending out.
5. the video frequency monitoring method based on virtual video camera as claimed in claim 4, it is characterised in that be in the video camera
During monopod video camera, the video frequency monitoring method based on virtual video camera also includes：
The control instruction for controlling monopod video camera that video terminal is sent to corresponding virtual video camera is received, according to video
The priority of the corresponding virtual video camera of terminal, it is allowed to which the corresponding video terminal of the high virtual video camera of priority is imaged to head
Machine is controlled.
6. a kind of video monitoring apparatus based on virtual video camera, are applied to video monitoring system, the video monitoring system bag
Include video camera, and ask the video terminal of video flowing to the video camera, it is characterised in that be described based on virtual video camera
Frequency supervising device, including：
Virtualization unit, for receiving the basic flow video data from video camera, fictionalizes the virtual video camera of predetermined quantity；
Requesting processing, the code stream for receiving from video terminal are asked, and the code stream request distribution for receiving is empty
Intend video camera as corresponding stream end of the video terminal；
Code stream encapsulation unit, for receiving the basic flow video data that the virtualization unit is sent to described stream end, according to
Code stream is sent to corresponding after asking the basic flow video data encapsulation that described stream end is received by corresponding code stream encapsulation format
Video terminal.
7. video monitoring apparatus based on virtual video camera as claimed in claim 6, it is characterised in that the virtualization unit
It is additionally operable to each virtual video camera for fictionalizing and one corresponding virtual VLAN is set；
The video monitoring apparatus based on virtual video camera, also including form maintenance unit, for safeguarding that virtual video camera makes
With information slip, the virtual video camera service condition table includes virtual video camera numbering, the corresponding VLAN of virtual video camera, virtual
Video camera IP, compatible platform agreement and service condition.
8. the frequency supervising device based on virtual video camera as claimed in claim 7, it is characterised in that the form maintenance unit
It is additionally operable to safeguard media stream table：
The media stream table include virtual video camera numbering, code stream encapsulation format, destination interface, source port, purpose IP and
Source IP.
9. video monitoring apparatus based on virtual video camera as claimed in claim 6, it is characterised in that described virtualization list
Unit is additionally operable to set the priority of each virtual video camera；
The requesting processing is the code for receiving from unappropriated virtual video camera according to the priority of virtual video camera
Stream request distribution virtual video camera flows end as sending out.
10. video monitoring apparatus based on virtual video camera as claimed in claim 9, it is characterised in that in the video camera
For monopod video camera when, the video monitoring apparatus based on virtual video camera, also including cradle head control unit, for receive regard
The control instruction for controlling monopod video camera that frequency terminal is sent to corresponding virtual video camera, and according to video terminal correspondence
Virtual video camera priority, it is allowed to the corresponding video terminal of the high virtual video camera of priority is controlled to monopod video camera
System.
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