CN101159628B - Method for video monitoring front end to cross over network address conversion module - Google Patents
Method for video monitoring front end to cross over network address conversion module Download PDFInfo
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- CN101159628B CN101159628B CN2007101769745A CN200710176974A CN101159628B CN 101159628 B CN101159628 B CN 101159628B CN 2007101769745 A CN2007101769745 A CN 2007101769745A CN 200710176974 A CN200710176974 A CN 200710176974A CN 101159628 B CN101159628 B CN 101159628B
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Abstract
The invention discloses a method for monitoring video monitoring front end passing through a network address conversion module. The method comprises the following steps: the monitoring front end actively connects with a streaming media server through a network address conversion module, and after setting up connection, the monitoring front end sets up a real-time steaming protocol (RTSP) conversation with the streaming media server; and keeping the RTSP conversation through periodically sending keeping message. The invention sets up the RTSP conversion between the monitoring front end and the monitoring platform through extension of the existing RTSP, and implements controlling of the real-time bit rate of playing through the active communication between the monitoring front end and the monitoring platform. The method does not require to use additional network equipments, is easy to implement, and has low cost.
Description
Technical field
The present invention relates to the video monitoring technology, particularly a kind of method of video monitoring front end to cross over network address conversion (NAT, Network Address Translation) module.
Background technology
Is an emerging multi-media value-added business by IP network for the client provides video monitoring service, and so-called video monitoring service is meant the brand-new value-added telecom services that image, sound and various alarm signal remote collection, transmission, storage, processing and relay are provided on use broadband network basis for the client.By this business, the user can not be subjected to time, site limitation, easily to monitoring objective monitor in real time, supervision and management and video recording storage, can arrange that also warning device be connected the realization alarm linkage with monitoring terminal equipment in the monitoring place.When abnormal conditions took place, system can send warning message to customized user by modes such as E-MAIL, mobile phones by the alarm mode that sets in advance, and to the abnormal conditions candid photograph of recording a video.
As shown in Figure 1, this operation system is made up of monitor supervision platform, some front monitoring front-ends, plurality of client end three parts.Wherein, front monitoring front-end mainly finish video/audio signal collection, encode, upload, finish collection, the processing of alarm signal, and finish control of auxiliary equipment such as video camera, The Cloud Terrace etc.; Monitor supervision platform generally is positioned at public network, mainly finishes distribution, equipment control, service management, operation support of medium etc.; Client is mainly the client and presents concrete video monitoring service.
Consideration for internet security, front monitoring front-end generally is not placed directly on the public network, but set up the local area network (LAN) (LAN that uses private IP address, Local Area Network), carry out the IP address transition by the network address translation (nat) module then, the NAT module can be router or the fire compartment wall with nat feature.As each front monitoring front-end among Fig. 1, the NAT module can make the monitor supervision platform that is positioned at public network directly control front monitoring front-end between front monitoring front-end and monitor supervision platform like this.
At present, the method that addresses this is that mainly is to increase gateway device in the front monitoring front-end side, but this method need be used extra equipment, has the high shortcoming of cost.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method of video monitoring front-end passing through NAT module, and realization is simple, convenient, and cost is low.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of method of video monitoring front end to cross over network address conversion module, this method may further comprise the steps:
A, front monitoring front-end initiatively are connected with streaming media server by network address conversion module, connect foundation back front monitoring front-end and streaming media server and set up real time streaming transport protocol RTSP session;
B, keep message, keep real time streaming transport protocol RTSP session by periodic the transmission;
C, streaming media server send request by the Set Parameter message of expansion to front monitoring front-end, carry out the control to front monitoring front-end; The request of described streaming media server is the expansion to the Set Parameter message format of RTSP, increases but is not limited to begin play, stops to play field; Described front monitoring front-end is operated the medium code stream to streaming media server transmission medium code stream and execution accordingly according to the field of expanding in the described Set Parameter message.
Steps A further comprises:
A1, front monitoring front-end send conversation message to streaming media server, the conversation message of streaming media server response monitoring front end;
A2, front monitoring front-end send the request of foundation, the foundation request of streaming media server response monitoring front end to streaming media server;
A3, front monitoring front-end send record request to streaming media server, the request of streaming media server response record, and real time streaming transport protocol RTSP session is set up successfully.
The described maintenance of step B RTSP session is:
Front monitoring front-end regularly sends to streaming media server and keeps message, streaming media server response monitoring front end.
This method also comprises step D: according to the request of streaming media server, corresponding medium code stream is play, stopped to front monitoring front-end.
Step D further comprises:
When client-requested stopped the playing media code stream, whether streaming media server judges had other clients to this front monitoring front-end monitoring, if do not have, then send and stop playing request to front monitoring front-end, stop the current media code stream and play,, then continue the current media code stream and play if having.
The present invention passes through existing real time streaming transport protocol (RTSP, Real Time Streaming Protocol) expands, set up the RTSP session that front monitoring front-end is initiated to monitor supervision platform, realize the active communication of front monitoring front-end and monitor supervision platform, this method does not need to increase the network equipment, is easy to realize, cost is low.
Description of drawings
Fig. 1 forms the schematic diagram of structure for existing supervisory control system;
Fig. 2 is that the supervisory control system of one embodiment of the invention is formed structural representation;
Fig. 3 is the realization flow figure of the inventive method;
Fig. 4 is for setting up the flow chart of RTSP session among the present invention.
Embodiment
Basic thought of the present invention is: by the expansion to the RTSP protocol message, make front monitoring front-end initiatively initiate the RTSP communication to monitor supervision platform, make be positioned at public network monitor supervision platform can with the front monitoring front-end communication that is positioned at private LAN, thereby the passing through NAT module has solved the problem that monitor supervision platform can not be controlled front monitoring front-end in the private network in the public network.
Be example with the supervisory control system among Fig. 2 below, method of the present invention is described.This supervisory control system comprises client 1, client 2, monitor supervision platform, NAT module, front monitoring front-end 1 and front monitoring front-end 2, wherein, comprises streaming media server (SS, Stream Server) 1 and streaming media server 2 in the monitor supervision platform; Monitor supervision platform is positioned at public network, and NAT module and front monitoring front-end 1, front monitoring front-end 2 are arranged in certain privately owned LAN.At this moment, the process that the monitor supervision platform that is positioned at public network is controlled, play each front monitoring front-end is that example describes with front monitoring front-end 1 as shown in Figure 3 below:
Step 1: front monitoring front-end 1 is to the available streaming media server of monitor supervision platform request.
Front monitoring front-end 1 is set up TCP by NAT module and monitor supervision platform and is linked after inserting supervisory control system, URL(uniform resource locator) (URL, the UniformResource Locator) address of the streaming media server that can use to the monitor supervision platform acquisition request.If this moment, streaming media server 1 can be used, then monitor supervision platform sends to front monitoring front-end 1 with the URL address of streaming media server 1.
Step 2: front monitoring front-end 1 uses the URL address to initiate the RTSP conversation request to SS1, and sets up corresponding RTSP session.
Front monitoring front-end 1 is arranged in privately owned local area network (LAN), and monitor supervision platform is arranged in public network, convert the privately owned address of front monitoring front-end 1 to available public address by the NAT module, thereby set up the communication of front monitoring front-end 1 and monitor supervision platform, and then, initiatively initiate a session request to SS1 by front monitoring front-end 1 by RTSPANNOUNCE message, SS1 responds this request, make SS1 find front monitoring front-end 1, thus the communication of setting up SS1 and front monitoring front-end 1, and detailed process is as shown in Figure 4.
Step 3:SS1 sends the request that begins the playing media code stream to front monitoring front-end 1, front monitoring front-end 1 response SS1.
Step 4: front monitoring front-end 1 sends the medium code stream to SS1.
Front monitoring front-end 1 sends the medium code stream to SS 1 by RTP (RTP, Real-time Transport Protocol), and front monitoring front-end 1 is regularly reported the transmission situation of code stream to SS1, go wrong if send, in time notice SS1.
Step 5:SS1 notice front monitoring front-end 1 stops monitoring, front monitoring front-end 1 response SS1.
The detailed process that front monitoring front-end 1 and SS1 set up the RTSP session is as shown in Figure 4:
Step 201: front monitoring front-end 1 has comprised media description informations such as media formats, medium type, streaming media server address, streaming media server receiving port number to the conversation message ANNOUNCE that SS1 sends RTSP in this message;
Media description informations such as step 202:SS1 medium type are in order to follow-up use;
Step 203:SS1 sends the ANNOUNCE response to front monitoring front-end 1;
Step 204: front monitoring front-end 1 sends to SS1 and sets up request SETUP;
Step 205:SS1 sends the SETUP response to front monitoring front-end 1, comprises the port numbers of SS1 receiving media in response message, so that during client-requested, SS1 is by corresponding port receiving stream media information;
Step 206: front monitoring front-end 1 sends record request RECORD to SS 1;
Step 207:SS1 sends the RECORD response to front monitoring front-end 1, and front monitoring front-end 1 and SS1 session are set up successfully;
Step 208: after front monitoring front-end 1 and SS1 session were set up successfully, front monitoring front-end 1 regularly sent RTSP to SS1 and keeps request message OPTIONS, to keep session connection; The initiation cycle of OPTION message is set when system's static configuration according to user's request.
Step 209:SS1 sends RTSP OPTIONS response to front monitoring front-end 1.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (5)
1. the method for a video monitoring front end to cross over network address conversion module is characterized in that, this method may further comprise the steps:
A, front monitoring front-end initiatively are connected with streaming media server by network address conversion module, connect foundation back front monitoring front-end and streaming media server and set up real time streaming transport protocol RTSP session;
B, keep message, keep real time streaming transport protocol RTSP session by periodic the transmission;
C, streaming media server send request by the Set Parameter message of expansion to front monitoring front-end, carry out the control to front monitoring front-end; The request of described streaming media server is the expansion to the Set Parameter message format of RTSP, increases but is not limited to begin play, stops to play field; Described front monitoring front-end is operated the medium code stream to streaming media server transmission medium code stream and execution accordingly according to the field of expanding in the described Set Parameter message.
2. the method for video monitoring front end to cross over network address conversion module according to claim 1 is characterized in that, steps A further comprises:
A1, front monitoring front-end send conversation message to streaming media server, the conversation message of streaming media server response monitoring front end;
A2, front monitoring front-end send the request of foundation, the foundation request of streaming media server response monitoring front end to streaming media server;
A3, front monitoring front-end send record request to streaming media server, the request of streaming media server response record, and real time streaming transport protocol RTSP session is set up successfully.
3. the method for video monitoring front end to cross over network address conversion module according to claim 1 is characterized in that, the described maintenance of step B RTSP session is:
Front monitoring front-end regularly sends to streaming media server and keeps message, streaming media server response monitoring front end.
4. the method for video monitoring front end to cross over network address conversion module according to claim 1 is characterized in that, this method also comprises step D: according to the request of streaming media server, corresponding medium code stream is play, stopped to front monitoring front-end.
5. the method for video monitoring front end to cross over network address conversion module according to claim 4 is characterized in that, step D further comprises:
When client-requested stopped the playing media code stream, whether streaming media server judges had other clients to this front monitoring front-end monitoring, if do not have, then send and stop playing request to front monitoring front-end, stop the current media code stream and play,, then continue the current media code stream and play if having.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101769745A CN101159628B (en) | 2007-11-07 | 2007-11-07 | Method for video monitoring front end to cross over network address conversion module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101769745A CN101159628B (en) | 2007-11-07 | 2007-11-07 | Method for video monitoring front end to cross over network address conversion module |
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| Publication Number | Publication Date |
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| CN101159628A CN101159628A (en) | 2008-04-09 |
| CN101159628B true CN101159628B (en) | 2011-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007101769745A Expired - Fee Related CN101159628B (en) | 2007-11-07 | 2007-11-07 | Method for video monitoring front end to cross over network address conversion module |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101729862B (en) * | 2008-10-21 | 2011-12-28 | 中兴通讯股份有限公司 | Method and system for passing media through NAT by using video monitoring system |
| CN103475533B (en) * | 2012-06-08 | 2019-02-15 | 中兴通讯股份有限公司 | Front monitoring front-end cut-in method, apparatus and system |
| CN109246115B (en) * | 2018-09-26 | 2021-05-25 | 杭州当虹科技股份有限公司 | Wireless network monitoring method of SIP protocol under GB28181 |
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Granted publication date: 20110119 Termination date: 20161107 |