CN101087406B - A method and system for instant snap of monitoring system - Google Patents
A method and system for instant snap of monitoring system Download PDFInfo
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- CN101087406B CN101087406B CN2007100751299A CN200710075129A CN101087406B CN 101087406 B CN101087406 B CN 101087406B CN 2007100751299 A CN2007100751299 A CN 2007100751299A CN 200710075129 A CN200710075129 A CN 200710075129A CN 101087406 B CN101087406 B CN 101087406B
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Abstract
The invention discloses a method and system of monitoring system snapshot, said method includes following steps: a: terminal sends snapshot request to video equipment; b: when the video equipment receives the snapshot request, the image collected is processed; c: the video equipment sends snapshot request response, the response takes the snapshot data; d: terminal receives the snapshot request response to obtain the snapshot data for image process. The video system in the invention adopts command connection, without operation of 'collecting, coding, buffering, and decoding', and the snapshot can be processed in advance, the snapshot data can be sent to terminal directly when the command is received, the delay of image on terminal can be decreased.
Description
Technical field
The present invention relates to multimedia technology field, relate in particular to a kind of method and system of system for instant snap of monitoring.
Background technology
Along with development of internet technology, a kind of new medium technique arises at the historic moment, stream media technology that Here it is.Streaming Media is meant the continuous time-base media that in network, uses the stream transmission technology, like audio frequency, video or multimedia file.The stream service can provide continual audio/video flow to the user, satisfies the online dynamically audio-visual demand of watching of user, and stream media technology is used in field of video monitoring greatly.Field of video monitoring is very high for the promptness requirement of image, but in fact image shows certain delay from the video equipment to the terminal.And Digital Video System has 2 factors to cause time-delay to increase when actual deployment usually:
1. the stream medium data of video equipment is given the terminal through transit server, and server is done the transfer processing to stream medium data and needed the cost certain hour, and display delayed increases at the terminal to have caused image.
2. when the network bandwidth is low, cause the Network Transmission time-delay to increase, display delayed increases at the terminal to cause image.
In this case, when snapshot video equipment snapshot, accomplish snapshot by the terminal according to current stream medium data and handle, then the picture of snapshot has certain delay equally.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method and system of system for instant snap of monitoring, reduces the time delay that image shows at the terminal.
For solving the problems of the technologies described above, the present invention realizes through following technical scheme:
A kind of method of system for instant snap of monitoring may further comprise the steps:
A: snapshot request is sent to video equipment in the terminal;
B: after video equipment receives snapshot request, the image of current collection is done snapshot handle;
C: video equipment sends the snapshot request response to the terminal, subsidiary snapshot data in the response;
D: the terminal receives the snapshot request response, gets access to snapshot data, does image processing;
Adopt instruction to be connected between said terminal and the video equipment.
In such scheme, instruction is connected and is to realize through the employing of the control command agreement between terminal and video equipment real-time streaming protocol between terminal and the video equipment.
Wherein, among the step b, video equipment can be anticipated the snapshot of several nearest times, when receiving the snapshot instruction, directly snapshot data is sent to the terminal.
A kind of system of system for instant snap of monitoring comprises video equipment and terminal; Video equipment is used for real-time images acquired as front monitoring front-end; The terminal is used for obtaining in real time the realtime graphic that front monitoring front-end is gathered as monitor terminal.
Wherein, said video equipment is supported RTSP (real-time streaming protocol), and said terminal obtains image through RTSP, RTP (real time streaming transport protocol) or RTCP (flow transmission control protocol in real time).
The present invention has following beneficial effect:
1) connection of video monitoring system is divided into usually: instruction connects and is connected with medium, and the operations consuming time such as " gather, encode, cushion, decode " when instructing connection not have medium connection transmission so the present invention has adopted instruction to connect, has reduced time delay greatly;
2) among the present invention, video terminal can be anticipated the snapshot of several nearest times, when receiving the snapshot instruction, directly snapshot data is sent to the terminal, has reduced because the video equipment front end is done the time delay that causes when snapshot is handled.
Description of drawings
Fig. 1 is a method flow diagram of the present invention;
Fig. 2 is the method flow diagram of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
Video monitoring system has following characteristics:
1, the connection of video monitoring system is divided into usually: instruction connects and is connected with medium.Because instruction connects the operations consuming time such as " collection, coding, buffering, decodings " when not having medium to connect transmission, so the time-delay of the transmission of instruction is much smaller than the transmission of Media Stream.
2, the video equipment images acquired is prior to the terminal display image.
The present invention has utilized the These characteristics of video monitoring system, has adopted following method, and is as shown in Figure 1:
101: the terminal is sent snapshot request and is given video equipment.
102: after video equipment receives snapshot request, the image (general raw image data is the RGB data) of current collection is done snapshot handle (for example boil down to jpeg image).
103: video equipment sends the snapshot request response to the terminal, subsidiary snapshot data in response.
104: the terminal receives snapshot request response, gets access to snapshot data, does image processing (for example show, preservation, editor etc.).
Wherein, video equipment can be anticipated the snapshot of several nearest times, when receiving the snapshot instruction, directly snapshot data is sent to the terminal, can reduce like this because the video equipment front end is done snapshot and handle the time delay that causes.This in advance the processing mode of snapshot also can be applicable to the video record processing flow process.
The agreement of the control command between video equipment and the terminal can be common custom protocol based on TCP/UDP (transmission control protocol/UDP), also can be the expansion on common protocol (like RTSP, SIP control protocols such as (conversation initialized protocols)).
As shown in Figure 2, in the practical implementation environment of present embodiment, video equipment is a front monitoring front-end, is used for real-time images acquired, and supports the RTSP agreement, and the terminal is monitor terminal, obtains the realtime graphic of front monitoring front-end in real time through the RTSP/RTP/RTCP agreement.
In this embodiment, control protocol is used the RTSP agreement, and the snapshot instruction of monitor terminal and front monitoring front-end is through the SET_PARAMETER method of expansion RTSP.For example: in the SET_PARAMETER method, definition " LivePic:On " is snapshot request, this moment rtsp request header form, can for:
C-＞S:SET_PARAMETER?rtsp://example.com/fizzle/foo?RTSP/1.0
| ?CSeq：421?Content-length：20?Content-type：text/parameters?LivePic：On |
Response can for:
| S->C:RTSP/1.0200OK CSeq:421 Content-length:1000 Coment-type:text/parameters snapshot image data |
The practical implementation step comprises:
201, monitor terminal is connected with the RTSP that front monitoring front-end is set up standard, through the Real-time Transport Protocol transmitting real-time media stream.This process is a standard procedure, and definition is carried in the RFC2326 document.
202, the user carries out snapshot operation at monitor terminal, as clicking snapshot button; Monitor terminal sends snapshot request through rtsp Set_Parameter method to front monitoring front-end.
203, after front monitoring front-end is received snapshot request, be the snapshot picture with the current coded image data that collects.
204, front monitoring front-end is to the response of monitor terminal transmission rtsp Set_Parameter method, additional snapshot image data in response.
205, monitor terminal is received the response of snapshot request, parses the snapshot image data, and makees picture and handle: show or preservation.
The present invention not only is applicable to the RTSP control protocol, and through simple deformation, control protocol also can be used other Network Control Protocols such as SIP, HTTP.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. the method for a system for instant snap of monitoring is characterized in that, may further comprise the steps:
A: snapshot request is sent to video equipment in the terminal, and wherein, video equipment is anticipated the snapshot of several nearest times, when receiving the snapshot instruction, directly snapshot data is sent to the terminal;
B: after video equipment receives snapshot request, send the snapshot request response, the subsidiary pretreated snapshot data of video equipment in the response to the terminal;
C: the terminal receives the snapshot request response, gets access to snapshot data, does image processing;
Wherein, adopt instruction to be connected between terminal and the video equipment.
2. the method for the described system for instant snap of monitoring of claim 1 is characterized in that, instruction is connected and is to realize through the employing of the control command agreement between terminal and video equipment real-time streaming protocol between terminal and the video equipment.
3. the system of a system for instant snap of monitoring is characterized in that, comprises video equipment and terminal; Video equipment is used for real-time images acquired as front monitoring front-end, and the snapshot that is used to anticipate several nearest times, when receiving the snapshot instruction, directly snapshot data is sent to the terminal; The terminal is used for obtaining in real time the realtime graphic that front monitoring front-end is gathered as monitor terminal; Said video equipment is supported real-time streaming protocol, adopts instruction to be connected between said terminal and the video equipment, and said terminal obtains image through real-time streaming protocol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100751299A CN101087406B (en) | 2007-06-19 | 2007-06-19 | A method and system for instant snap of monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100751299A CN101087406B (en) | 2007-06-19 | 2007-06-19 | A method and system for instant snap of monitoring system |
Publications (2)
| Publication Number | Publication Date |
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| CN101087406A CN101087406A (en) | 2007-12-12 |
| CN101087406B true CN101087406B (en) | 2012-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007100751299A Expired - Fee Related CN101087406B (en) | 2007-06-19 | 2007-06-19 | A method and system for instant snap of monitoring system |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8065272B2 (en) * | 2008-05-30 | 2011-11-22 | Symantec Corporation | Systems and methods for tracking changes to a volume |
| CN103152557B (en) * | 2013-03-22 | 2017-03-22 | 浙江宇视科技有限公司 | Device and method for realizing coordination across network of client working scene |
| TWI762465B (en) * | 2016-02-12 | 2022-05-01 | 瑞士商納格維遜股份有限公司 | Method and system to share a snapshot extracted from a video transmission |
| CN110324578B (en) * | 2019-07-01 | 2021-05-11 | 视联动力信息技术股份有限公司 | Monitoring video processing method, device and storage medium |
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