CN100525314C - Video-recording file transmitting method in multistage video frequency monitoring system - Google Patents

Abstract

A video file transmission method in a multi-level video surveillance system, the transmission of video files stored on an original storage server to a target storage server includes the steps of: setting a transmission module on the original storage server and the target storage server; Set up the control module on the client at the same level as the storage server; establish the network connection between the client and the original storage server and the target storage server; the original storage server and the target storage server provide the transmission service license to the client; The server and the target storage server establish a transmission service connection to obtain the file information to be transmitted; the client sends the transmission service license and the file information to be transmitted to the original storage server through the control module; under the control of the control module, the connection between the original storage server and the target storage server The transfer service connection is established between them, and the files to be transferred are transferred from the original storage server to the target storage server.

Description

Video file transmission method in multi-level video surveillance system

technical field

The invention belongs to the technical field of video monitoring, in particular to a video file transmission method in a multi-stage video monitoring system.

Background technique

After experiencing the era of analog surveillance represented by analog video recorders, the era of digital surveillance represented by hard disk video recorders, and the era of remote surveillance represented by video servers, the video surveillance system is entering the era of networked surveillance.

In the era of network monitoring, all monitoring devices are required to be connected through the network in order to achieve interconnection, intercommunication and mutual control, and provide network monitoring information resource sharing services. In the network monitoring system, different levels of monitoring centers will be formed. For example, taking the urban public security video monitoring and alarm network system as an example, there will be police station monitoring centers, sub-bureau monitoring centers, municipal bureau monitoring centers, and provincial department monitoring centers. Taking the bank video monitoring and alarm network system as an example, it will also form a county branch monitoring center, a city branch monitoring center, a provincial branch monitoring center, etc.

In these video surveillance systems, each monitoring center will be equipped with storage servers and clients. The storage server is mainly used to store video files: the storage capacity of the storage server is configured according to the actual situation, and the video data from the front-end monitoring point is stored. The client is mainly used to browse the video files in the storage server and the real-time images of the front-end monitoring points. It can also be used for system management and setting, such as PTZ control, alarm, group switching, GIS and video file transmission control. Under the sharing requirements of network monitoring information resources, the storage server needs to accept the video data of the storage servers of other monitoring centers, and is required to provide video data to the storage servers of other monitoring centers. After the video file is transmitted and stored, it can be browsed on the corresponding client.

In practical applications, it is necessary to send the video data of the storage server of the monitoring center at the same level to the storage server of the superior monitoring center through the client. The video data on the storage server of the monitoring center is sent to the storage server of the municipal sub-branch monitoring center, etc., and this process is called uploading of video data. At the same time, it is also necessary to extract the video data on the storage server of the lower-level monitoring center to the storage server of the same-level monitoring center. The video data on the server, this process is called the downregulation of the video data. Regardless of uploading or downloading, the principle of transferring video files is essentially the same. The principle of the method currently used to transfer video files is: the original storage server where the video file to be transferred is located, and the target storage server to be transferred to, and a network connection is directly established between the two for transfer. If the transfer control is at the level of the original storage server It is uploading, and if the transfer control is at the level of the target storage server, it is downgrading. The disadvantage of this method is that it needs to be operated on site at the location of the storage server, and due to the lack of an effective control mechanism, the security is low and the error rate is high. response, which cannot meet the security requirements of global real-time monitoring. The key technical problem at present is how to conveniently and efficiently realize video file transmission in a multi-level video surveillance system.

Contents of the invention

The purpose of the present invention is to provide a method for video data transmission between storage servers of monitoring centers at all levels.

In order to achieve the above object, the present invention transmits the video files stored on the original storage server to the target storage server and includes the following steps: setting the transmission module on the original storage server and the target storage server, and inserting the operating system of the storage server; Set up a control module on the client at the same level as the original storage server or the target storage server, and hang it into the operating system of the client; the client establishes a network connection between the client and the original storage server and the target storage server through the control module; connection, the original storage server and the target storage server respectively provide the transmission service license to the client through the transmission module; the client respectively establishes a transmission service connection with the original storage server and the target storage server, selects the file to be transmitted on the original storage server through the transmission service connection, And obtain the storage path of the file to be transmitted from the target storage server; the client passes the transmission service permission of the target storage server and the storage path of the file to be transmitted to the original storage server through the control module; under the control of the control module, the original storage server and the target storage server A transfer service connection is established between them, and the files to be transferred are transferred from the original storage server to the target storage server.

Moreover, the network connections between the client and the original storage server and the target storage server are TCP/IP connections based on the Socket protocol.

Moreover, the transmission service connection is an FTP connection, and the content permitted by the transmission service includes a username and password for the FTP connection.

Moreover, during the process of transferring files to be transferred from the original storage server to the target storage server, the client monitors various conditions in the transmission process in real time, and regularly monitors the network status of the original storage server and the target storage server. If the remaining network bandwidth of any of the storage servers cannot meet the requirements, the original storage server and the target storage server are notified to suspend the transmission process until the remaining network bandwidth meets the requirements and continue the transmission.

The present invention utilizes the video file transmission between the monitoring centers at all levels in the client control system in the multi-level video monitoring system, can perform remote control safely and efficiently, can cope with various hardware and network conditions, and can strengthen the performance of the multi-level video monitoring system. function.

Description of drawings

Fig. 1 is a schematic diagram of the principle of the present invention.

Fig. 2 is a flow chart of the client in the uploading embodiment of the present invention.

Fig. 3 is a flow chart of the current storage server in the uploading embodiment of the present invention.

Fig. 4 is a flow chart of the upper-level storage server in the uploading embodiment of the present invention.

Fig. 5 is a flow chart of the client in the down-regulation embodiment of the present invention.

Fig. 6 is a flow chart of the storage server at the current level in the downscaling embodiment of the present invention.

FIG. 7 is a flowchart of a lower-level storage server in a downscaling embodiment of the present invention.

Detailed ways

Referring to the accompanying drawings, the multi-level video monitoring system of the present invention includes different levels of monitoring centers, each level of monitoring center is provided with a storage server and a client, the storage server stores the video files from the monitoring point, and the client can browse the video files in the storage server. video files. The present invention transmits the video file stored on the original storage server to the target storage server and includes the following steps: setting a transmission module on the original storage server and the target storage server, and inserting into the operating system of the storage server; Set up the control module on the client at the same level as the storage server, and hang it into the operating system of the client; the client establishes the network port connection between the client and the original storage server and the target storage server respectively through the control module; The storage server and the target storage server respectively provide the transfer service license to the client through the transfer module; the client respectively establishes a transfer service connection with the original storage server and the target storage server, selects the file to be transferred on the original storage server through the transfer service connection, and downloads the file from the target The storage server obtains the storage path of the file to be transferred; the client passes the transmission service permission of the target storage server and the storage path of the file to be transferred to the original storage server through the control module; under the control of the control module, the original storage server and the target storage server establish The transfer service is connected, and the files to be transferred are transferred from the original storage server to the target storage server. If the control module is set on the client at the same level as the original storage server, and then the client controls the transmission, it is uploading; the control module is set on the client at the same level as the target storage server, and then the client controls the transmission is uploaded. Refer to Figure 1 in the accompanying drawings, the primary monitoring center includes storage server A and client C, and the secondary monitoring center includes storage server B and client D. Solid arrows indicate data transmission during uploading, and dashed arrows indicate down-regulation Data transfer in process.

In the specific implementation, the transmission direction in the multi-level video surveillance system is determined according to the specific needs and the control position, that is, each storage server may be the original storage server or the target storage server, and each client may be used to control the transmission . Therefore, in order to meet the needs of uploading or downloading transmission in any two-level monitoring center of the multi-level video monitoring system, the present invention firstly sets corresponding support on all levels of storage servers and clients in the multi-level video monitoring system during implementation. Software modules for sustainable, repeatable, and controllable delivery.

Modern operating systems generally provide an abstract file system interface model, and subsequent developers can mount specific file systems developed by themselves. The so-called module of the present invention refers to a specific file system for transmission support based on the current computer software technology and using the idea of modular programming. The invention sets a transmission module in the storage server to support access control, bandwidth calculation and file transmission. At the same time, a control module is configured on the client to control the entire transmission process. In the present invention, the data of video data is called video file. In fact, according to the specific monitoring content and storage format, there may also be video files, audio files, alarm signals, etc. The so-called target storage server is not necessarily the adjacent storage server of the original storage server, but can be the storage server of any other monitoring center in the multi-level video surveillance system, that is to say, video files can be transmitted between any two storage servers. And because the levels in the video monitoring system are often divided by people according to the rules of jurisdiction, in fact the present invention is applicable to various monitoring systems and is not limited to the specific configuration of the system.

In order to adapt to different underlying communication software and specific operating systems that may occur in the multi-level video surveillance system, the network connection between the client and the original storage server and the target storage server is TCP/IP (Transmission Control/IP) based on the Socket protocol. Internet Protocol) connection. Socket is a socket specification based on the transport layer protocol, which defines the specification for communication between two computers (also a programming specification), and shields the differences between the underlying communication software and the specific operating system. Socket enables communication between any two computers that have installed TCP protocol software and implemented the socket specification.

In order to realize file transfer conveniently, the transfer service connection between the original storage server and the target storage server is an FTP connection, and the content of the transfer service permission in the present invention includes the user name and password of the FTP connection. The FTP protocol is the file transfer protocol. It is a standard protocol. The FTP protocol is also an application protocol standard using the TCP/IP protocol. It is the easiest way to exchange files between computers and networks. If the network bandwidth is insufficient, the transmission cannot be carried out normally. Therefore, it is necessary to determine the respective network bandwidths of the current storage server and the target storage server in advance to ensure smooth transmission.

It should be noted that the first TCP/IP connection established between the client and the original storage server and the target storage server in the present invention is a network port-to-port connection, that is, a transport layer connection. Therefore, the transfer of the file information to be transmitted also needs to be obtained by establishing an application layer connection between the client and the original storage server and the target storage server. ), the folder path of the video files to be transferred in the original storage server. This kind of application layer connection requirement can also be realized by FTP connection. Since the user name and password are required to use FTP, the client obtains the file information to be transferred after obtaining the FTP user name and password of the current storage server and the target storage server and establishing an FTP connection. It is relatively simple to pass the file path and file name to the processor using an application layer connection such as FTP. FTP connection also can not use user name and password, adopts anonymous access mode, and the embodiment of the present invention must need user name and password for safe setting.

In order to prevent transmission errors, during the process of transferring files to be transferred from the original storage server to the target storage server, the client needs to monitor various conditions during the transmission process in real time, and regularly monitor the network status of the original storage server and the target storage server. If the remaining network bandwidth of any one of the storage server and the target storage server cannot meet the requirements, the original storage server and the target storage server are notified to suspend the transmission process, and continue the transmission until the remaining network bandwidth meets the requirements. Monitor various conditions during the transmission process, including start, transmission, pause, completion, error, etc. If an error occurs, it can be retransmitted. In the embodiment, the real-time detection is realized through a series of specific steps, and the present invention is summarized as the real-time detection steps for the sake of simplicity.

Since the implementation of specific transmission is divided into two cases of uploading and downsizing, the present invention provides two embodiments of uploading and downsizing, respectively describing the workflow of the client, the original storage server, and the target storage server for implementation. Note that the concepts of upper-level storage server, lower-level storage server, lower-level storage server, and local machine appearing in the workflow description are all relative to the subject running the specific process. The software for realizing the workflow is the transmission module and the control module. It is worth noting that a storage server in a multi-level video surveillance system is often used as both the original storage server to provide video files and the target storage server to obtain video files, and the processing procedures required for these two functions are similar. Therefore, the storage servers in the multi-level video surveillance system can use the same control module.

The following is divided into two embodiments of uploading and downregulation for specific description so as to implement:

(1) Uploading is controlled by a client at the same level as the original storage server.

Client Workflow

111) The client first needs to establish a TCP/IP connection with the upper-level storage server (ie, the target storage server of the upload embodiment) through Socket, and obtain the user name and password of the current FTP service (FileTransfer Protocol) of the upper-level storage server.

112) Obtain the current usage of network resources of the upper-level storage server;

The present invention adds the step 112a) of judging whether the remaining bandwidth meets the requirements according to the network resource situation. If the remaining bandwidth is greater than the bandwidth for transmitting a video file, it means that the upper-level storage server can accept the video file transmitted by the lower-level storage server, which meets the requirements, then The client and the superior storage server set up an FTP connection, search for a file path that accepts uploaded video files, and return this list of folders to the client; if not satisfied, jump to step 118) to finish uploading.

113) The client and the storage server at the same level (the storage server at the same level as the client, i.e. the original storage server in the uploading embodiment) establish a TCP/IP connection through Socket to obtain the username and password of the current FTP service of the storage server at the current level.

114) Obtain the usage situation of the network resources of the current network bandwidth of the storage server at this level,

The present invention adds the step 114a of judging whether the remaining bandwidth meets the requirements according to the network resource situation. If the remaining bandwidth is greater than the bandwidth for transmitting a video file, it means that the storage server at this level can upload the video file to the storage server at the upper level; if the remaining bandwidth cannot meet the requirements, Skip to step 118) to finish uploading.

115) The client end establishes an FTP connection with the storage server of this level, searches for the folder path of the video file to be uploaded according to the location, time, device model or channel number, and selects the video file to be uploaded.

116) The client sends the user name and password of the FTP of the upper-level storage server to the current-level storage server together with the folder and file name of the selected video file, and the storage path of the folder where the upper-level storage server receives the video file.

117) The client controls the storage server at the current level to establish an FTP connection with the storage server at the upper level, and starts file transfer,

The present invention adds implementation monitoring step 117a), real-time monitoring of various conditions in the transmission process, such as startup, transmission, pause, completion, error, etc., regularly monitors the network conditions of the storage server at this level and the storage server at the upper level, as long as the storage at the current level The remaining network bandwidth of any one of the server and the upper-level storage server cannot meet the requirements, notify the current-level storage server and the upper-level storage server to suspend the upload process until the remaining network bandwidth meets the requirements, and continue to monitor the current-level storage server without exceeding the timeout and the network status of the upper-level storage server, until the bandwidth is satisfied, the file is transmitted until the transmission is completed; when the timeout is over, enter step 118) to end the upload.

118) Complete the uploading of this video file, obtain and record relevant parameters of the uploading process, such as result, time, status, etc., and close all FTP connections.

The process of the storage server at this level

121) The current level storage server and the client establish a TCP/IP connection through Socket, and send the user name and password of the current FTP service of the current level storage server to the client;

122) Obtain the usage status of the current network resource and send it to the client;

123) The storage server at this level establishes an FTP connection with the client, and searches for the folder path where the video file needs to be uploaded according to the location, time, device model or channel number proposed by the client, and selects the video file information to be uploaded to the client;

124) obtain the user name and the password of the FTP of the upper-level storage server from the client, and the folder where the upper-level storage server receives the video files;

125) Under the control of the client, establish an FTP connection with the upper-level storage server, and perform file transfer until the end of the transfer process.

The present invention adds implementation monitoring step 125a), real-time monitoring of various conditions in the transmission process, such as startup, transmission, suspension, completion, error, etc., and sends the remaining network bandwidth of the storage server at this level to the client, and responds The request of the client suspends the transmission request and resends the network bandwidth, and the end of the transmission request in response to the client's request jumps to step 126) to end the upload.

126) End the uploading of this video file, and close the FTP connection.

Process of upper-level storage server

131) Establish a TCP/IP connection with the client through Socket to obtain the user name and password of the current FTP service of this machine;

132) Obtain the usage of the network resources of the current local machine (that is, the target storage server of the upload embodiment), and send it to the client;

133) establish FTP connection with client, search to accept the file path of uploading video file, and this folder list is sent back to client, and the username and password of the current FTP service of this machine are sent to client;

134) Under the control of the client, establish an FTP connection with the lower-level storage server (ie, the original storage server in the uploading embodiment), and accept and transmit the file until the receiving is completed.

The present invention adds implementation monitoring step 134a), real-time monitoring of various conditions in the transmission process, such as start, transmission, pause, completion, error, etc., and send the remaining network bandwidth of the machine to the client, and respond to the client Require to suspend the acceptance request to suspend receiving and resend the network bandwidth, and respond to the client's request to end the acceptance request and jump to step 135) to end the acceptance of the video file.

135) End the uploading process of this video file, and close the FTP connection.

(2) For down-regulation, the client at the same level as the target storage server is used for control.

client process

211) The client and the lower-level storage server (i.e. the original storage server in the down-regulated embodiment) establish a TCP/IP connection through Socket, and obtain the user name and password of the FTP service of the lower-level storage server;

212) The client obtains the network resource status of the lower-level storage server,

The present invention has added the step 212a) of judging whether the remaining bandwidth satisfies the requirements according to the network resource situation, if the remaining bandwidth is greater than the bandwidth for transmitting one-way video files, it means that the lower-level storage server meets the requirements and can transmit the video files, then continue to lower the control work; if not Satisfied, indicating that the remaining bandwidth cannot meet the requirements, jump to step 218) to end the downward adjustment.

213) establish a TCP/IP connection with the storage server of the current level (i.e. the target storage server of the down-regulation embodiment) through Socket, and obtain the user name and password of the FTP service of the storage server of the current level;

214) Obtain the status of the network resources of the storage server at this level,

The present invention adds the step 214a) of judging whether the remaining bandwidth meets the requirements according to the network resource situation. If the remaining bandwidth is greater than the bandwidth for transmitting a video file, it means that the storage server at this level can accept the video file transmitted by the storage server at the lower level, and satisfies the requirements for continuing the downward adjustment process. Requirement; cannot be met, indicating that the remaining bandwidth cannot meet the requirement, and jump to step 218) to end the downward adjustment.

215) The client and the lower-level storage server establish an FTP connection, and query the video folder path that needs to be lowered by the upper-level storage server according to the requirements of the client, such as location, time, device model or channel number, and select the video file that needs to be lowered, and send it to client;

216) Set up an FTP connection with the storage server of this level to obtain the folder where the down-recorded video file is stored, that is, the storage path of the down-down video folder;

217) The client notifies the storage server at the current level and the storage server at the lower level to establish an FTP connection for file transfer,

The present invention adds implementation monitoring step 217a), real-time monitoring of various conditions in the transmission process, such as startup, transmission, pause, completion, error, etc., regularly monitors the network status of the storage server at the current level and the storage server at the lower level, as long as the storage at the current level The remaining network bandwidth of any one of the server and the lower-level storage server cannot meet the requirements, notify the current-level storage server and the lower-level storage server to suspend the upload process until the remaining network bandwidth meets the requirements, and continue to monitor the current-level storage server without exceeding the timeout and the network status of the lower-level storage server, if the bandwidth is satisfied, the file is transferred until the transfer is completed; when the timeout is exceeded, step 218) is completed and the adjustment is completed.

218) Complete the down-regulation of the video file, obtain and record relevant parameters related to the down-regulation process, such as result, time, status, etc., and close all connections.

The process of the storage server at this level

221) establish a TCP/IP connection with the client through Socket, and send the user name and password of the FTP service of the storage server at this level to the client;

222) Obtain the status of the network resources of the storage server at the current level, and send it to the client;

223) establish an FTP connection with the client, query the folder path where the recorded video file is stored and send it to the client;

224) Obtain relevant commands from the client, establish an FTP connection with the upper-level storage server, and perform file transfer;

The present invention has added implementation monitoring step 224a), real-time monitoring various situations in the transmission process, such as start-up

Start, transmit, pause, complete, make mistakes, etc., and respond to the client's request to suspend the receiving request to resend the network bandwidth, and respond to the client's request to end the receiving request and jump to step 225) to end accepting the video file.

225) End the downward adjustment process of the video file, and close the FTP connection.

Flow of lower-level storage server

231) establish a TCP/IP connection with the client through the Socket, and send the user name and password of the FTP service to the client;

232) Obtain the network resource status of the current local machine (ie, the original storage server in the down-regulated embodiment), and send it to the client;

233) establish an FTP connection with the client, according to the requirements of the client, such as location, time, device model or channel number, query the video folder path that needs to be lowered by the superior storage server, and select the required video file, and send it to the client;

234) Obtain relevant commands from the client, and establish an FTP connection with the upper-level storage server to start file transfer;

The present invention adds implementation monitoring step 234a), monitors various conditions in the transmission process in real time, such as startup, transmission, suspension, completion, error, etc., and responds to the request of the client to suspend the sending request, suspend the down-regulation process and resend the local network bandwidth Situation, in response to the request of the client end sending the request and jumping to step 235) to end sending the video file.

235) End the downward adjustment process of the video file, and close the FTP connection.

Claims (4)

1. a video file transmission method in a multi-level video surveillance system, said multi-level video monitoring system includes different levels of monitoring centers, each level of monitoring center is provided with a storage server and a client, and the storage server stores the video recording from the monitoring point file, the client has the function of browsing video files in the storage server, and it is characterized in that: the video file stored on the original storage server is transmitted to the target storage server and includes the following steps, the original storage server is where the video file to be transmitted is located storage server, the target storage server is the storage server to be transferred to, Set the transmission module on the original storage server and the target storage server, and mount the operating systems of the original storage server and the target storage server respectively; Set up a control module on the client at the same level as the original storage server or the target storage server, and connect to the operating system of the client; The client establishes network connections between the client and the original storage server and the target storage server respectively through the control module; After network connection, the original storage server and the target storage server respectively provide the transmission service license to the client through the transmission module; The client establishes a transfer service connection with the original storage server and the target storage server respectively, selects the file to be transferred on the original storage server through the transfer service connection, and obtains the storage path of the file to be transferred from the target storage server; The client passes the transmission service permission of the target storage server and the storage path of the file to be transferred to the original storage server through the control module; Under the control of the control module, a transfer service connection is established between the original storage server and the target storage server, and the files to be transferred are transferred from the original storage server to the target storage server. 2. The video file transmission method as claimed in claim 1, characterized in that: the network connection between the client and the original storage server and the target storage server respectively is a TCP/IP connection based on the Socket protocol. 3. The video file transmission method according to claim 1, characterized in that: the transmission service connection is an FTP connection, and the content permitted by the transmission service includes a username and password for the FTP connection. 4. The video file transmission method according to claim 1, 2 or 3, characterized in that: in the process of transferring the file to be transferred from the original storage server to the target storage server, the client monitors various conditions in the transmission process in real time , regularly monitor the network status of the original storage server and the target storage server, if the remaining network bandwidth of any of the original storage server and the target storage server cannot meet the requirements, notify the original storage server and the target storage server to suspend the transmission process until the remaining network bandwidth meets the requirements Proceed with the transfer upon request.

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