WO2011160298A1

WO2011160298A1 - Method and system for issuing network video

Info

Publication number: WO2011160298A1
Application number: PCT/CN2010/074339
Authority: WO
Inventors: 赵勇
Original assignee: 深圳市中瀛鑫科技股份有限公司
Priority date: 2010-06-23
Filing date: 2010-06-23
Publication date: 2011-12-29

Abstract

A method and system for issuing network video are disclosed in the present invention. The method includes that: a server establishes a video acquisition terminal recording table which comprises an identification code of the video acquisition terminal, an IP address and an access mode thereof; the server receives an access request which is sent from a client side and is used for accessing the video acquisition terminal, wherein the access request includes the identification code of the video acquisition terminal; the access mode of the video acquisition terminal to be accessed by the client side is determined; if the access mode is a direct connection mode, the IP address of the video acquisition terminal is searched according to the identification code and sent to the client side; and if the access mode of the video acquisition terminal accessed by the client side is a backward interlinkage mode, an upload request is sent to the video acquisition terminal, the video acquisition terminal is requested to upload video images and the received video images are forwarded to the client side. The present invention can lead the client side to be easier to view the video images of the video acquisition terminal.

Description

Network video publishing method and system

Technical field

The present invention relates to the field of network communications, and in particular, to a network video publishing method and system.

Background technique

There are two ways to remote network video surveillance in the prior art:

Centralized monitoring. Set the camera in multiple areas, based on the traditional access mode, using DDN, V.90 Modem, ISDN and other access methods for remote centralized monitoring in the equipment room. This method basically uses a special networking scheme, requires a large amount of streaming media forwarding, and has a designated monitoring terminal, and not all terminals can see the monitoring image.

Remote monitoring in a point-to-point manner. A remote monitoring system based on ADSL/CableModem point-to-point mode, such as a home remote monitoring system. Add a video capture card to the PC of the video capture terminal in the monitored area or to the video server to access 1-4 analog video signals. The remote client uses an access method such as ADSL/CM/LAN/Modem to access the Internet, and then finds the PC or video server in the monitored area according to the IP address of the video collection terminal ADSL, extracts image signals, and performs monitoring on the monitored area. Image observation and language communication.

In the above two methods, most of the video capture terminals are installed in the local area network. The external remote client cannot access the video capture terminal because it cannot penetrate the LAN or the router used by the client has a firewall. Collect video images of the area monitored by the terminal.

technical problem

The main technical problem to be solved by the present invention is to provide a network video publishing method and system, which is convenient for an external remote client to see a video image of a region monitored by the video collection terminal.

Technical solution

According to an aspect of the present invention, a network video publishing method is provided, including:

Establishing a video collection terminal record table, where the record table includes at least an identifier of the video collection terminal, an IP address, and an access method;

The server receives an access request sent by the client to access the video collection terminal, where the access request includes an identity identification code of the video collection terminal that the client wants to access;

Determining, according to the identity identification code of the video collection terminal that the client that is included in the access request, the access mode of the video collection terminal that the client wants to access;

If the access mode of the video collection terminal to be accessed by the client is directly connected, the IP address of the video collection terminal is searched according to the identity identification code of the video collection terminal, and the IP address of the video collection terminal is sent to the Describe the client, so that the client accesses the video collection terminal;

If the access mode of the video collection terminal to be accessed by the client is a backlink, send an upload request to the video collection terminal, request the video collection terminal to upload a video image, and forward the received video image to the client. end.

According to another aspect of the present invention, a network video distribution system is provided, including: a video collection terminal recording table, the record table includes at least an identification code of the video collection terminal and an IP address and an access method thereof; and a receiving unit, configured to receive the client The access request sent by the terminal to the video collection terminal, where the access request includes an identifier of the video collection terminal that the client wants to access; the search unit is configured to collect, according to the video that the client included in the access request is to access An identification code of the terminal, in which the access mode of the video collection terminal is found, and the identity of the video collection terminal is determined when the access mode of the video collection terminal to be accessed by the client is directly connected The IP address of the video collection terminal is searched; the request uploading unit is configured to send an upload request to the video collection terminal when the access mode of the video collection terminal to be accessed by the client is a reverse link, and request the video collection terminal to upload a video image; a sending unit, configured to find the video captured by the searching unit The IP address of the terminal is sent to the client, so that the client accesses the video collection terminal, or forwards the received video image uploaded by the video collection terminal to the client.

The present invention further provides a network video distribution system, comprising: at least one video collection terminal for capturing an image of a monitored area; at least one server, the server comprising a receiving unit, a sending unit, and a request uploading unit, the receiving unit The requesting uploading unit is configured to send an uploading request to the video collecting terminal, where the request is sent by the client, and the video image uploaded by the video collecting terminal is sent by the client; The sending unit is configured to send the IP address of the video collection terminal to be accessed to the client, or forward the video image uploaded by the video collection terminal to the client; the control center includes a video collection terminal record table and a search a unit, the record table includes at least an identification code of the video collection terminal and an IP address and an access method thereof; the searching unit learns the video collection from the record table according to the identity identification code of the video collection terminal sent by the client The access mode of the terminal, the video capture to be accessed by the client. The access mode of the terminal is to search for the IP address of the video collection terminal according to the identity identification code of the video collection terminal, and send the information to the client through the server, and the access mode of the video collection terminal that the client wants to access And controlling, by the server, to send an upload request to the video collection terminal, and requesting the video collection terminal to upload a video image.

The present invention also provides a computer executable program having the above functions and a medium storing the program.

Beneficial effect

The direct connection and the reverse tunneling manner enable the video collection terminal to remain connected to the server after registration, and the user can view the video that he wants to view in time, regardless of whether the local area network of the video collection terminal can be penetrated. Capture the video image captured by the terminal.

DRAWINGS

FIG. 1 is a flowchart of a network video distribution according to an embodiment of the present invention;

2 is a structural diagram of a network video distribution system according to another embodiment of the present invention;

3 is a structural diagram of a network video distribution system according to still another embodiment of the present invention;

4 is a flowchart of a network video distribution according to still another embodiment of the present invention;

FIG. 5 is a virtual multicast diagram formed in an embodiment of the present invention.

Embodiments of the invention

The present invention will be further described in detail below with reference to the accompanying drawings.

Since most video capture terminals are installed in a local area network, it is difficult for an external remote client to access the video capture terminal through the local area network. To this end, the core of the present invention is to assign a fixed identification code to the video capture terminal. The video collection terminal registers with the network video distribution system when the device is powered on, or records the identification code of the video collection terminal, the IP address and the access mode of the video collection terminal on the network video distribution system. Each user knows its access mode through the ID of the network video capture terminal, and sees the video image in a proper way to realize the function of real-time video distribution.

The first mode: the user can directly access the video collection terminal by obtaining the IP address of the video collection terminal.

The second method: when the local area where the video collection terminal is located cannot be penetrated, that is, when the local area cannot be directly accessed, the server system notifies the video collection terminal to first send the video image to the server, and the server forwards the video image to the user for viewing.

The network video distribution system for implementing the above functions includes a video collection terminal recording table, a receiving unit, a searching unit, a request uploading unit, and a transmitting unit. The video collection terminal record table includes at least the identification code of the video collection terminal, its IP address and access mode, and may also include the relevant port number and online status. The receiving unit is configured to receive an access request sent by the client to access the video collection terminal, where the access request includes an identity identification code of the video collection terminal that the client wants to access. The searching unit is configured to search for the access mode of the video collection terminal in the record table according to the identifier of the video collection terminal in the access request, and when the access mode of the video collection terminal to be accessed by the client is directly connected Searching for an IP address or an IP address and a port number of the video collection terminal according to the identity identification code of the video collection terminal. The request uploading unit is configured to send an upload request to the video collecting terminal when the access mode of the video collecting terminal to be accessed by the client is a reverse link, and request the video collecting terminal to upload a video image. The sending unit is configured to send, to the client, an IP address or an IP address and a port number of the video collection terminal that is searched by the searching unit, so that the client accesses the video collection terminal, or the received The video image uploaded by the video collection terminal is forwarded to the client.

The network video publishing method based on the above network video publishing system is as shown in FIG. 1 and includes the following steps:

Step S11, first, a video collection terminal recording table is established on the system, where the recording table includes an identification code of the video collection terminal, an IP address and an access method thereof, or an identification code of the video collection terminal, an IP address, and a port thereof. Number and access method. The access mode includes the direct connection mode and the reverse link mode. When the local area network where the video collection terminal is located is transparent, the access mode of the video collection terminal is recorded as a direct connection mode. When the local area network where the video collection terminal is located cannot be penetrated, the video collection is performed. The access mode of the terminal is recorded as a reverse link method.

Step S12: When the client needs to view the video image of a video collection terminal, log in to the server, and send an access request to the video collection terminal to the server, where the access request includes a video collection terminal to be accessed by the client. The identification code, the server receives the access request sent by the client, and then performs step S13.

Step S13, determining an access mode of the video collection terminal that the client wants to access. The access record is associated with the identifier of the video capture terminal included in the access request, and the access mode associated with the identifier is obtained. The access mode is the access mode required by the video capture terminal.

Step S14: If the access mode of the video collection terminal to be accessed by the client is the direct connection mode, the IP address or the IP address and the port number of the video collection terminal are searched according to the identity identification code of the video collection terminal, and the steps are S15, sending an IP address or an IP address and a port number of the video collection terminal to the client, so that the client accesses the video collection terminal;

Step S16: If the access mode of the video collection terminal to be accessed by the client is the reverse link mode, send an upload request to the video collection terminal, and request the video capture terminal to upload a video image. In step S17, when the video image uploaded by the video collection terminal is received, the received video image is forwarded to the client.

The following description will be made by way of specific examples.

Embodiment 1:

In this embodiment, as shown in FIG. 2, the network video distribution system includes at least one video collection terminal 21, at least one server 22, and a control center 23 that are connected.

The video capture terminal 21 is used to capture an image of the monitored area, which may be an integrated camera and video server, or a network camera. The server 22 includes a receiving unit 221, a transmitting unit 222, and a request uploading unit 223. The control center 23 includes a video collecting terminal recording table 231 and a searching unit 232.

The video collection terminal 21 is provided with an identification code. When the video collection terminal 21 registers with the server 22, it sends its own identification code, IP address and port number to the server 22, and the server 22 collects the video. The identification code, IP address, and port number of the terminal 21 are recorded in the video collection terminal recording table 231 of the control center 23. The record table 231 includes an identity code of the video capture terminal and an IP address, a port number, and an access mode, the identity code is associated with the IP address and a related port number; or the identity code and the The IP address is associated.

After registering with the server 22, the video collection terminal 21 waits for the reverse connection of the server 22. If the connection is reversed, it indicates that the local area network where the video collection terminal is located can be penetrated, and the access mode is recorded as a direct connection mode. When the reverse connection of the server 22 fails to be established within the specified time, the video collection terminal 21 considers that the local area network cannot be penetrated, and then actively establishes a connection with the server 22, that is, establishes a so-called reverse tunnel, and the access mode is recorded as a back link. the way. After the video capture terminal 21 and the server 22 are connected, the server 22 records the online status and connection mode (direct or reverse link) of the video capture terminal, and summarizes it into the video capture terminal record table 231 of the control center. The server dynamically updates the IP address, online status, and access mode of the video collection terminal, or updates the IP address, related port number, online status, and access mode of the video collection terminal. The updated results are overwritten with the records in the video collection terminal record table.

When the client 24 of the remote user logs in to a certain server 22 and issues an access request to the server 22 to access a certain video collection terminal, the access request includes the identification code of the video collection terminal 21 to be accessed. The receiving unit 221 of the server 22 receives the access request sent by the client, and the server 22 summarizes the access request to the control center 23. The searching unit 232 of the control center 23 learns the access mode of the video collection terminal from the record table 231 according to the identity identification code of the video collection terminal sent by the client, and the video collection that the search unit 232 needs to access at the client terminal 24. When the access mode of the terminal 21 is directly connected, the IP address and the port number of the video collection terminal are searched according to the identity identification code of the video collection terminal, and sent to the sending unit 222 of the server, where the sending unit 222 collects the video. The IP address or IP address and port number of the terminal are sent to the client 24. When the access mode of the video collection terminal to be accessed by the client 24 is a reverse link, the search unit 232 of the control center controls the request uploading unit 223 of the server to send an upload request to the video collection terminal 21, requesting the video collection. The terminal uploads a video image.

The video capture terminal 21 uploads the video image to the server 22. After receiving the video image, the receiving unit 221 of the server forwards the video image to the client 24 through the sending unit 223.

In this embodiment, the remote client only needs to know the identity identification code of the video collection terminal to be accessed. When the local area network where the video collection terminal is located can be penetrated, the remote client can directly access the video collection terminal to implement the Real-time viewing of the video and control of the video capture terminal can greatly reduce the burden on the server. When the local area network where the video collection terminal is located cannot be penetrated, the server forwards the video image uploaded by the video collection terminal to the client, so that the client can also see the image of the video collection terminal in real time.

Embodiment 2:

As shown in FIG. 3, different from the first embodiment, the control center 23 of the network video distribution system further includes a first determining unit 233 and a second determining unit 234, and the first determining unit 233 determines that the video capture is to be accessed. Whether the number of clients of the terminal 21 exceeds a set amount, and if so, the request uploading unit 223 is controlled to send an upload request to the video collecting terminal 21. The video collection terminal cannot bear simultaneous access by multiple clients. For example, the video collection terminal can receive up to 10 simultaneous accesses by the client. When the server receives the request of the client to access a certain video collection terminal, the access request is summarized to the control. The center 23, the control center 23 counts the number of clients requesting access to the same video collection terminal during this time. If the set amount (for example, 8) is exceeded, the request uploading unit 223 is controlled to send an upload request to the video collection terminal. The video capture terminal is required to upload a video image to the server 22, and the server 22 forwards the video image to the client 24. To ensure the normal operation of the video collection terminal, the set amount should be less than or equal to the maximum number of concurrently accessible clients of the video capture terminal.

In order to prevent many clients from accessing the same video collection terminal, a second determining unit 234 is also designed in the embodiment, and the second determining unit 234 determines whether the server 22 has the capability to forward all the video collections to be accessed. The client of the terminal, if yes, controls the sending unit 222 to forward the video image to all clients that want to access the video collection terminal; otherwise, the second determining unit 234 controls the sending unit 222 to The received video images are forwarded to a number of servers within the same system, and the server receiving the video images forwards the video images to all clients according to a predetermined scheduling rule. The scheduling rule may be, for example, a multicast mode, to form a virtual multicast network, as shown in FIG. 5.

The network video publishing method of the network video distribution system based on this embodiment is as shown in FIG. 4, and includes the following steps:

Step S41: The client logs in to the server, and sends an access request to the server to access the video collection terminal, where the access request includes the identity identification code of the video collection terminal to be accessed.

In step S42, the server transmits the access request to the control center.

In step S43, the control center counts the number of clients accessing the same video collection terminal. When the number of clients accessing the same video collection terminal exceeds the set amount, step S45 is performed, when the number of clients accessing the same video collection terminal does not exceed When the amount is set, step S44 is performed.

Step S44: The control center learns the online status and access mode of the video collection terminal from the record table according to the identity identification code of the video collection terminal sent by the client, and the access mode of the video collection terminal that the client wants to access. In the case of the direct connection mode, step S51 is performed. When the access mode of the video collection terminal to be accessed by the client is the reverse link mode, step S54 is performed.

In step S45, the control center notifies the server.

Step S46: The server sends an upload request to the video collection terminal, and requests the video collection terminal to upload a video image. In this case, regardless of the access mode of the video collection terminal, the server sends an upload request to the video collection terminal.

In step S47, the video collection terminal uploads a video image to the server.

In step S48, the server determines whether it has the capability to forward to all clients that want to access the video collection terminal. If yes, step S49 is performed, otherwise the server forwards the received video image to several servers in the same system. And transmitting, by the server receiving the video image, the video image to all clients according to a predetermined scheduling rule.

In step S49, the server forwards the video image to all clients that want to access the video collection terminal.

In step S51, the control center searches the record table for the associated IP address or IP address and port number according to the identity code of the video collection terminal sent by the client, and sends the IP address or IP address and port number to the server.

In step S52, the server sends the IP address or IP address and port number to the client.

In step S53, the client links with the video collection terminal to access and control the video collection terminal.

In step S54, the control center notifies the server.

In step S55, the server sends an upload request to the video collection terminal, and requests the video collection terminal to upload a video image.

In step S56, the video collection terminal uploads a video image to the server.

In step S57, the server forwards the received video image to the client.

This embodiment has three ways of viewing video images.

The first mode: the user can directly access the network video collection terminal, that is, the public network IP address and the associated port number of the network video collection terminal registered by the specific network video collection terminal on the server directly access the video collection terminal. . This can greatly reduce the burden on the server.

The second way: the LAN where the video capture terminal is located cannot be penetrated (direct access), and the video capture terminal can connect to the server system and always keep the connection, but does not send video (and establish a so-called reverse tunnel). When a user sends a video viewing request, the server system notifies the video collection terminal to first transmit to the server system, and the server system forwards to the viewing user.

The third way: when there are more users to watch, it is also forwarded by the server system. That is, it is first transmitted from the video collection terminal to a server in the server system, and then the server forwards the video signal to other servers, which then forward the data to other viewed users. The system will be assigned a forwarding relationship between the server and the user by a unified scheduling algorithm. Therefore, the entire server system constitutes a virtual multicast network. For example, in a kindergarten or school setting up a network video publishing system, a class usually has dozens of students. When the parents of these students are required to view the video recording of the class at the same time, the virtual multicast network can be used to reduce one. The burden on the server shortens the time the parents wait to receive video images.

In the above embodiment, the control center may be a single computer or a server, or may be only one software system installed in one of the servers.

The above process can be written in various computer languages into a program executable by a computer, which can be executed by a computer to perform the above functions.

In one embodiment, the program is executed by a computer to perform the following functions:

Establishing a video collection terminal record table, where the record table includes at least an identity identification code of the video collection terminal registered thereto and an IP address and an access mode of the video collection terminal;

Receiving an access request sent by the client to access the video collection terminal;

Determining, according to the identity request code of the video collection terminal that the client wants to access, the access mode of the video collection terminal that the client wants to access;

If the access mode of the video collection terminal to be accessed by the client is directly connected, the IP address of the video collection terminal is searched according to the identity identification code of the video collection terminal, and the IP address of the video collection terminal is sent to the Client

In another embodiment, the program can also perform the following functions through computer execution:

Determining whether the number of clients to access the video collection terminal exceeds a set amount, and if yes, sending an upload request to the video collection terminal, requesting the video collection terminal to upload a video image to the server, and receiving the received The video image is forwarded to at least one client.

Determining whether the server has the capability to forward the video image to all clients that need to access the video collection terminal, and if yes, forwarding the video image to all clients that need to access the video collection terminal, otherwise And the server forwards the received video image to a plurality of servers in the same system, and the server that receives the video image forwards the video image to all clients according to a predetermined scheduling rule.

After registering with the server, the video collection terminal waits for the reverse connection of the server. If the reverse connection is successful within the set time, the server records the access mode of the video collection terminal in the record table. In the direct connection mode, the video collection terminal actively establishes a connection with the server and maintains a connection when the reverse connection fails to be established within the set time, and the server records the access mode of the video collection terminal in the record table. For backlinks.

The program having the above functions may be stored on the medium by various storage methods, which may be various semiconductor storage devices such as a hard disk, an optical disk, a flash disk, and the like.

The network video distribution system of the invention is suitable for home security, public place monitoring, factory monitoring, kindergarten school security monitoring and remote meeting.

The above is a further detailed description of the present invention in connection with the specific embodiments, and the specific embodiments of the present invention are not limited to the description. It will be apparent to those skilled in the art that the present invention may be made without departing from the spirit and scope of the invention.

Claims

A network video publishing method, comprising:

Establishing a video collection terminal record table, where the record table includes at least an identifier of the video collection terminal, an IP address, and an access method;

The server receives an access request sent by the client to access the video collection terminal;

Determining, according to the identity identification code of the video collection terminal that the client that is included in the access request, the access mode of the video collection terminal that the client wants to access;

If the access mode of the video collection terminal to be accessed by the client is directly connected, the IP address of the video collection terminal is searched according to the identity identification code of the video collection terminal, and the IP address of the video collection terminal is sent to the Describe the client, so that the client accesses the video collection terminal;

If the access mode of the video collection terminal to be accessed by the client is a backlink, send an upload request to the video collection terminal, request the video collection terminal to upload a video image, and forward the received video image to the client. end.
The method according to claim 1, wherein after the server receives the request for accessing the video collection terminal sent by the client, the method further comprises: determining whether the number of clients to access the video collection terminal exceeds a set amount, If yes, sending an upload request to the video collection terminal, requesting the video collection terminal to upload a video image to the server, and forwarding the received video image to at least one client.
The method according to claim 1 or 2, further comprising: after the server receives the video image uploaded by the video collection terminal, further comprising: determining whether the server has the capability to forward the video image Giving all clients that want to access the video collection terminal, if yes, forwarding the video image to all clients that want to access the video collection terminal, otherwise the server forwards the received video image To several servers within the same system, the video image is forwarded to all clients by a server that receives the video image in accordance with a predetermined scheduling rule.
The method according to any one of claims 1 to 3, further comprising the step of periodically updating the IP address, port number and access mode in the record table.
The method according to any one of claims 1 to 3, wherein the access mode of the video collection terminal to be accessed by the client is obtained from the record table according to the identity identification code of the video collection terminal.
A network video distribution system, comprising:

a video collection terminal recording table, where the recording table includes at least an identification code of the video collection terminal, an IP address thereof, and an access method;

a receiving unit, configured to receive an access request sent by the client to access the video collection terminal, where the access request includes an identity identification code of the video collection terminal that the client wants to access;

a searching unit, configured to search, according to the identifier of the video collection terminal that the client that is included in the access request, the access mode of the video collection terminal, and the client to access The access mode of the video collection terminal is that, when the connection is directly connected, the IP address of the video collection terminal is searched according to the identity identification code of the video collection terminal;

The request uploading unit is configured to send an upload request to the video collecting terminal when the access mode of the video collecting terminal to be accessed by the client is a reverse link, and request the video collecting terminal to upload a video image;

a sending unit, configured to send an IP address of the video collection terminal that is searched by the search unit to the client, so that the client accesses the video collection terminal, or uploads the received video collection terminal The video image is forwarded to the client.
The system according to claim 6, further comprising a first determining unit, wherein the first determining unit determines whether the number of clients to access the video collecting terminal exceeds a set amount, and if so, controls the The request uploading unit sends an upload request to the video collection terminal.
The system according to claim 6 or 7, further comprising a second determining unit, wherein said second determining unit determines whether said server has the capability to forward to all clients that want to access said video collecting terminal, if If yes, the sending unit is controlled to forward the video image to all clients that want to access the video collection terminal. Otherwise, the second determining unit controls the sending unit to forward the received video image to On several servers within the same system, the video image is forwarded to all clients by a server that receives the video image according to a predetermined scheduling rule.
A network video distribution system, comprising:

At least one video capture terminal for capturing an image of the monitored area;

At least one server, the server includes a receiving unit, a sending unit, and a request uploading unit, where the receiving unit is configured to receive an access request that is sent by the client and includes an identifier that is to be accessed by the video collecting terminal, and the video collecting terminal uploads The request uploading unit is configured to send an upload request to the video collection terminal; the sending unit is configured to send the IP address of the video collection terminal to be accessed to the client, or upload the video collection terminal The video image is forwarded to the client;

a control center, the control center includes a video collection terminal recording table and a searching unit, where the recording table includes at least an identification code of the video collection terminal, an IP address and an access manner thereof, and the searching unit is configured according to the video collection terminal sent by the client. The identification code of the video collection terminal is obtained from the record table, and the video is searched according to the identity identification code of the video collection terminal when the access mode of the video collection terminal to be accessed by the client is directly connected. The IP address of the terminal is collected and sent to the client by the server, and when the access mode of the video collection terminal to be accessed by the client is a reverse link, the server is controlled to send an upload request to the video collection terminal, and the The video capture terminal uploads a video image.
The system according to claim 9, wherein the control center further comprises a first determining unit, wherein the first determining unit is configured to count the number of clients that want to access the same video collecting terminal, when accessing the same video collection When the number of clients of the terminal exceeds the set amount, the control server sends an upload request to the video collection terminal.
The system according to claim 9 or 10, wherein the server further comprises a second determining unit, the second determining unit determining whether the server has the capability to forward to all clients who want to access the video collecting terminal End, if yes, controlling the sending unit to forward the video image to all clients that want to access the video collection terminal, otherwise, the second determining unit controls the video that the sending unit will receive The images are forwarded to a number of servers within the same system, and the video image is forwarded by the server receiving the video image to all clients in accordance with predetermined scheduling rules.
The system according to any one of claims 9 to 11, wherein the video collection terminal transmits its own identification code, IP address and port number to the server when registering with the server. The server records the identity identification code, the IP address, and the port number of the video collection terminal into the video collection terminal record table of the control center.
The system according to claim 12, wherein said video collection terminal waits for a reverse connection of said server after registering with said server, and if said reverse connection is successful within a set time, said server Recording the access mode of the video collection terminal in the record table as a direct connection mode; the video collection terminal actively establishes a connection with the server and maintains a connection when the reverse connection fails to be established within a set time, the server The access mode of the video collection terminal in the record table is recorded as a reverse link mode.
The system of claim 13 wherein said control center periodically updates the IP address, port number, and access mode in said record table.
The system according to any one of claims 9 to 14, wherein the video capture terminal comprises a camera and a video server integrated together, or the video capture terminal is a network camera.
A program executable by a computer, characterized in that the program is executed by a computer to perform the following functions:

Establishing a video collection terminal record table, where the record table includes at least an identity identification code of the video collection terminal registered thereto and an IP address and an access mode of the video collection terminal;

Receiving an access request sent by the client to access the video collection terminal;

Determining, according to the identity request code of the video collection terminal that the client wants to access, the access mode of the video collection terminal that the client wants to access;

If the access mode of the video collection terminal to be accessed by the client is directly connected, the IP address of the video collection terminal is searched according to the identity identification code of the video collection terminal, and the IP address of the video collection terminal is sent to the Client

If the access mode of the video collection terminal to be accessed by the client is a backlink, send an upload request to the video collection terminal, request the video collection terminal to upload a video image, and forward the received video image to the client. end.
The program according to claim 16, wherein said program is executed by a computer to perform the following functions:

Determining whether the number of clients to access the video collection terminal exceeds a set amount, and if yes, sending an upload request to the video collection terminal, requesting the video collection terminal to upload a video image to the server, and receiving the received The video image is forwarded to at least one client.
The program according to claim 17, wherein said program is executed by a computer to perform the following functions:

Determining whether the server has the capability to forward the video image to all clients that need to access the video collection terminal, and if yes, forwarding the video image to all clients that need to access the video collection terminal, otherwise And the server forwards the received video image to a plurality of servers in the same system, and the server that receives the video image forwards the video image to all clients according to a predetermined scheduling rule.
A computer readable medium having a computer executable program, the program being executed by a computer to perform the following functions:

Establishing a video collection terminal record table, where the record table includes at least an identity identification code of the video collection terminal registered thereto and an IP address and an access mode of the video collection terminal;

Receiving an access request sent by the client to access the video collection terminal;

Determining, according to the identity request code of the video collection terminal that the client wants to access, the access mode of the video collection terminal that the client wants to access;

If the access mode of the video collection terminal to be accessed by the client is directly connected, the IP address of the video collection terminal is searched according to the identity identification code of the video collection terminal, and the IP address of the video collection terminal is sent to the Client

If the access mode of the video collection terminal to be accessed by the client is a backlink, send an upload request to the video collection terminal, request the video collection terminal to upload a video image, and forward the received video image to the client. end.
The medium according to claim 19, wherein said program is executed by a computer to perform the following functions:

Determining whether the number of clients to access the video collection terminal exceeds a set amount, and if yes, sending an upload request to the video collection terminal, requesting the video collection terminal to upload a video image to the server, and receiving the received The video image is forwarded to at least one client.