CN102045540A - Video monitoring method, system and equipment - Google Patents

Abstract

Embodiments of the present invention provide a video monitoring method, system, and equipment, wherein the method includes: the video monitoring platform receives a video browsing request from a client unit, and the video browsing request carries a transcoding identification parameter; according to the video browsing The identification information of the front-end acquisition device carried in the request searches for the code stream before transcoding collected by the front-end acquisition device; the video monitoring platform transcodes the code stream before transcoding according to the transcoding identification parameters to form a transcode post-code stream: the video monitoring platform sends the transcoded code stream to the client unit, so that the client unit can receive and play the transcoded code stream corresponding to the transcoding identification parameter. In the embodiment of the present invention, the video monitoring platform is used to perform unified transcoding processing for each client unit, thereby realizing the normalization of transcoding processing.

Description

Video monitoring method, system and device

technical field

Embodiments of the present invention relate to video monitoring technology, and in particular to a video monitoring method, system and equipment.

Background technique

Video Surveillance (Video Surveillance, referred to as: VS) technology refers to the technology of collecting video information of each monitored location through front-end acquisition equipment, and then the video control platform uniformly monitors the collected video information. Existing front-end acquisition devices usually use fixed code stream parameters to encode the collected video information. Therefore, when interconnecting with clients or other devices in the video surveillance system, different clients will use different code stream parameters, so transcoding processing is required. However, in the existing video surveillance system, the transcoding process for different clients is different, resulting in unreasonable system architecture, poor compatibility, high transcoding cost, and is not conducive to system update and upgrade.

Contents of the invention

The implementation of the present invention provides a video monitoring method, system and equipment to realize unified transcoding processing for different encoding parameters.

An embodiment of the present invention provides a video monitoring method, including:

The video monitoring platform receives a video browsing request from the client unit, and the video browsing request carries a transcoding identification parameter;

The video monitoring platform searches for the code stream before transcoding collected by the front-end acquisition device according to the identification information of the front-end acquisition device carried in the video browsing request;

The video surveillance platform transcodes the code stream before transcoding according to the transcoding identification parameter to form a code stream after transcoding;

The video surveillance platform sends the transcoded code stream to the client unit, so that the client unit can receive and play the transcoded code stream corresponding to the transcoding identification parameter.

The embodiment of the present invention also provides another monitoring video acquisition method, including:

The client unit sends a video browsing request to the video monitoring platform, and the video browsing request carries a transcoding identification parameter;

The client unit receives and plays the transcoded code stream sent by the video forwarding and distribution unit in the video monitoring platform or plugged into the video monitoring platform, and the transcoded code stream is based on the transcoding identifier Parameters are formed by transcoding the code stream before transcoding.

An embodiment of the present invention provides a central management server, including:

The server-side receiving module is used to receive a video browsing request from the client unit, and the video browsing request carries a transcoding identification parameter;

A search module, configured to search for the code stream before transcoding collected by the front-end capture device according to the identification information of the front-end capture device carried in the video browsing request;

The sending module on the server side is configured to send the pre-transcoding stream found by the search module to the video transcoding unit, so that the video transcoding unit sends the pre-transcoding stream to the media transcoding unit ;

An instruction module, configured to send a transcoding notification carrying a transcoding identification parameter to the media transcoding unit, instructing the media transcoding unit to transcode the pre-transcoding code stream according to the transcoding identification parameter to form Transcoded code stream; and for sending a code stream distribution notification to the video transcoding unit, instructing the video transcoding unit to send the transcoded code stream obtained from the media transcoding unit to the client end unit.

The embodiment of the present invention provides a client unit, including:

The client-side sending module is used to send a video browsing request to the video monitoring platform, and the video browsing request carries a transcoding identification parameter;

The client side receiving module is used to receive and play the transcoded code stream sent by the video distribution unit in the video surveillance platform or the video surveillance platform plug-in, and the transcoded code stream is according to the The transcoding identification parameter is formed by transcoding the code stream before transcoding.

An embodiment of the present invention provides a video forwarding and distribution unit, including:

The receiving module on the distribution side is used to receive the code stream before transcoding and the code stream distribution notification from the central management server, as well as the transcoding code stream formed by the media transcoding unit according to the transcoding identification parameter. Coded code stream, the transcoding identification parameter is obtained by the central management server from the video browsing request sent by the client unit;

A sending module on the distribution side, configured to send the code stream before transcoding to the media transcoding unit, and send the code stream after transcoding to the client unit according to the code stream distribution notification, so that The client unit is capable of receiving and playing the transcoded stream corresponding to the transcoding identification parameter.

An embodiment of the present invention provides a media transcoding unit, including:

The receiving module on the transcoding side is connected to the video transcoding unit, and is used to receive the code stream before transcoding from the video transcoding unit and the transcoding notification carrying the transcoding identification parameter from the central management server. The transcoding identification parameter is obtained by the central management server from the video browsing request sent by the client unit;

A transcoding execution module, configured to transcode the received code stream before transcoding according to the transcoding identification parameter in the transcoding notification received by the receiving module at the transcoding side, and form a code stream after transcoding;

The transcoding side sending module is configured to send the transcoded code stream formed by the transcoding execution module to the video transcoding unit.

The embodiment of the present invention provides a central management server according to the embodiment of the present invention, the client unit according to the embodiment of the present invention, the video forwarding and distributing unit according to the embodiment of the present invention and the embodiment of the present invention which are connected by communication. The video monitoring system of the media transcoding unit described in the example further includes: a front-end acquisition device connected to the central management server and the video transcoding unit for acquiring real-time monitoring code stream as the code stream before transcoding.

The embodiment of the present invention realizes the monitoring of the video collected by the front-end acquisition equipment. Since the video monitoring platform is used to carry out unified transcoding processing for each client unit, the normalization of transcoding processing is realized, so it is not necessary to target different The client unit designs different transcoding processes, which simplifies the system architecture, reduces costs, and improves the compatibility of various devices in the monitoring system.

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Description of drawings

FIG. 1 is a flow chart of a video surveillance method provided by Embodiment 1 of the present invention;

Fig. 2 is the specific flowchart of step 103 in the method shown in Fig. 1;

FIG. 3 is a flow chart of a video surveillance method provided by Embodiment 2 of the present invention;

Fig. 4 is a signaling diagram of the embodiment shown in Fig. 3;

FIG. 5 is a schematic structural diagram of a video surveillance system provided by Embodiment 4 of the present invention;

FIG. 6 is a schematic structural diagram of the central management server in FIG. 5;

Fig. 7 is a schematic structural diagram of the video forwarding and distributing unit in Fig. 5;

FIG. 8 is a schematic structural diagram of the media transcoding unit in FIG. 5;

Fig. 9 is a schematic structural diagram of the client unit in Fig. 5;

FIG. 10 is a schematic structural diagram of a video surveillance system provided by Embodiment 5 of the present invention.

Detailed ways

Embodiment one

Fig. 1 is a flowchart of a video surveillance method provided by Embodiment 1 of the present invention. As shown in the figure, the method includes:

Step 101, the central management server (Center Manager Server, referred to as: CMS) in the video monitoring platform receives the video browsing request from the client unit (Client Unit, referred to as: CU), and the video browsing request carries the transcoding identification parameter . The transcoding identification parameter refers to the parameters of the code stream that can be decoded and played by the client unit, such as encoding format, resolution, frame rate, bit rate, encoding level and grade and other parameters. The transcoding identification parameter is a demand parameter proposed by the client unit for the code stream it needs to receive and play, and may include hardware parameters of the client unit, such as the size of the display screen, and may also include transmission parameters of the code stream received by the client unit, For example, the identification or encoding format name of different networks, because the access bandwidth that different networks can provide is different, and the encoding format requirements for code streams are also different;

Among them, the front-end acquisition device can also be called the front-end unit (Peripheral Unit, referred to as: PU), specifically, it can be a camera and other equipment, and through the hardware interface, the external lens, audio input/output, alarm input/output, cloud mirror and other sub-devices, Provide the monitoring system with functions such as real-time monitoring of audio and video data, monitoring of front-end alarm signals, and realization of monitoring front-end cloud mirror control. In addition, in order to realize functions such as audio collection and temperature collection, components such as microphones, recorders, and sensors can also be added to the front-end collection equipment.

Specifically, the monitoring user can access the video monitoring platform through the client unit to obtain the monitoring resource list, select the front-end acquisition device in the returned monitoring resource list, and send a video browsing request, and the selected front-end acquisition device can be included in the video browsing request. The identification information of the device, such as the lens ID, is used to request to browse the video collected by the front-end collection device for monitoring.

Step 102, the CMS of the video monitoring platform searches for the code stream before transcoding collected by the front-end capture device according to the identification information of the front-end capture device carried in the video browsing request.

Among them, the code stream before transcoding refers to the code stream formed by the front-end acquisition device after encoding the collected video data with its own code stream parameters. The codestream of is called the pre-transcode codestream, which has not yet been transcoded for each client unit.

Step 103 , the video surveillance platform transcodes the code stream before transcoding according to the transcoding identification parameter, and forms a code stream after transcoding. Specifically, the transcoding operation can be performed through a Media Transcoding Unit (Media Transcoding Unit, referred to as: MTU) integrated in the video surveillance platform or plugged into the video surveillance platform). After the transcoding identification parameter is determined according to the instruction of the client unit, how to perform transcoding can be accomplished by using a conventional transcoding technology, which will not be repeated here.

Step 104, the video monitoring platform sends the transcoded code stream to the client unit, so that the client unit can receive the code stream based on its own access network, and can correctly identify and play and transcode The transcoded code stream corresponding to the identification parameter. Specifically, the video surveillance platform can send the transcoded code stream to the client unit by a Video Transfer Distribution Unit (VTDU for short) connected to the MTU. Specifically, the CMS may first send a code stream distribution notification to the VTDU; and then the VTDU sends the transcoded code stream to the client unit according to the code stream distribution notification. The CMS can carry the identification of the client unit sending the video browsing request in the code stream distribution notification, then the VTDU can identify the identification of the client unit, and distribute the obtained transcoded code stream to the corresponding client unit.

Through the method of this embodiment, the monitoring of the video collected by the front-end acquisition equipment is realized. Since the video monitoring platform, especially the MTU, performs unified transcoding processing for each client unit, the normalization of transcoding processing is realized. Uniformity, so there is no need to design different transcoding processes for different client units, which simplifies the system architecture, reduces transcoding costs, and improves the compatibility of various devices in the monitoring system.

Specifically, step 103 of this embodiment may use the MTU attached to the VTDU of the video monitoring platform to transcode the pre-transcoded code stream from the VTDU according to the transcoding identification parameter to form a post-transcoded code stream. Accordingly, by using the plug-in mode to add MTU to the video surveillance platform, it has transcoding capability, the coupling to peripheral units is small, and it is easy to deploy. Therefore, there is no need to change the topology of other devices in the video surveillance platform, nor In order to have the transcoding capability, other media components in the existing network are upgraded; moreover, by concentrating all the transcoding capabilities on the intranet, it is also beneficial to reduce the IP traffic pressure on the public network.

In addition, compared with the existing static and dynamic transcoding methods, the Dynamic Media Transcoding method used in this embodiment also has outstanding technical advantages. The specific analysis is as follows:

1. Compared with the existing static transcoding method, technical advantages

The existing static transcoding method means that the monitoring system takes into account all transcoding requirements in the initial state. The video code stream is transcoded, so that after the system is started, there are already various transcoded code streams in the video surveillance platform, and then the required code stream is provided to the requester according to the received video browsing request. But in fact, since many transcoded code streams are not accessed by anyone, it will cause waste of system resources, and the cost is relatively high.

However, the method described in this implementation performs transcoding only after receiving the video browsing request sent by the client unit, which belongs to a dynamic transcoding method, therefore, it will not cause waste of system resources, thereby helping to save costs.

2. Compared with the existing dynamic transcoding method, the technical advantages

The existing dynamic transcoding means that the front-end video acquisition equipment does not immediately pre-transcode after collecting video information and encoding with fixed stream parameters, but when a specific video surveillance service triggers transcoding, by Each specific monitoring service subsystem superimposed on the basic capabilities of video monitoring (such as: distribution, recording, playback, alarm, etc.) performs transcoding, and processes the transcoded code stream according to business requirements. Although the waste of system resources is reduced compared with the static transcoding method, due to the strong coupling between the transcoding server performing the transcoding operation and the business subsystem in the specific video surveillance system, multiple business subsystems with transcoding requirements The system may repeatedly transcode the code stream of a specific surveillance video.

However, the method described in this implementation only performs transcoding according to the needs of the client unit, and is not associated with specific monitoring services. Usually they are not the same. For example, even if the two client units are PC clients, their resolution and other parameters may also be different. Therefore, it is rare to cause repeated transcoding, which is beneficial to reduce the system burden. , improve operating efficiency.

Fig. 2 is the specific flowchart of step 103 in the method shown in Fig. 1, and this step 103 specifically comprises:

Step 103A, the CMS in the video monitoring platform sends the received code stream before transcoding to the VTDU in the video monitoring platform, so that the VTDU sends the code stream before transcoding to the video monitoring platform MTU.

Step 103B, the CMS sends a transcoding notification carrying the transcoding identification parameter to the MTU, so that the MTU can transcode the code stream before transcoding according to the transcoding identification parameter in the transcoding notification, A transcoded code stream is formed and sent to the VTDU. Specifically, the MTU can convert the same pre-transcoding code stream into multiple post-transcoding code streams conforming to corresponding parameters according to different transcoding identification parameters in the received transcoding notification.

Specifically, in the above steps, the CMS can first select a VTDU and an MTU connected to it according to the operating status information of multiple VTDUs and the MTUs connected to these VTDUs, and then send the transcode to the selected VTDU For the pre-code stream, send the transcoding notification to the selected MTU. Wherein, the operation status information includes the content distribution of the code stream before transcoding, the load status of the device, the health status of the device, and the decoding capability. Therefore, it is beneficial to optimize the VTDU and MTU. For example, if you choose a VTDU that is physically closer to the client unit that initiates the video browsing request, it will help reduce the distance of code stream transmission and improve speed and quality; for another example, if you choose a VTDU with a better load The MTU and its corresponding VTDU are beneficial to allocate the workload of transcoding reasonably and improve the utilization rate of equipment; for example, if you choose a VTDU and MTU with good health and strong decoding ability, it will help improve the efficiency of transcoding. efficiency and success rate.

It should be noted here that, according to the selection of the CMS, the code stream before transcoding and the code stream after transcoding can be distributed by different VTDUs, or can be distributed by the same VTDU.

Through the above specific process, the VTDU and MTU realize the acquisition and transcoding processing of the code stream before transcoding under the unified debugging of the CMS.

Embodiment two

FIG. 3 is a flow chart of a video surveillance method provided by Embodiment 2 of the present invention. As shown in the figure, compared with the embodiment shown in FIG. 1 , step 105 is added in this embodiment. That is, in step 102, when the CMS in the video monitoring platform searches for the code stream before transcoding collected by the front-end acquisition device according to the identification information of the front-end acquisition device carried in the video browsing request, if the transcoder is found flow, execute step 103, otherwise execute step 105.

Step 105, when the CMS does not find the pre-transcoding code stream, instruct the front-end acquisition device to perform real-time video acquisition, and use the collected real-time monitoring code stream as the pre-transcoding code stream, and then continue to execute the steps 103 and 104, finally generate the transcoded code stream and send it to the client unit.

The signaling flow of the method described in this embodiment is illustrated below by using FIG. 4 as an example. As shown in the figure, the signaling process specifically includes:

S1: After the monitoring user accesses the video monitoring platform through the CU to obtain the monitoring resource list, select the front-end acquisition device in the returned monitoring resource list;

S2: The CU sends a video browsing request to the CMS of the video surveillance platform. The video browsing request carries the identification information and transcoding identification parameters of the front-end acquisition device to be accessed, such as the lens identification (ID) of the camera, and carries its own display Parameters such as screen size and resolution are used as transcoding identification parameters;

S3: CMS processes the received video browsing request, and selects VTDU and MTU according to the operating status information;

S4: CMS sends code stream distribution notification to VTDU;

S5: VTDU processes the code stream distribution notification and replies to the CMS with a code stream distribution notification response;

S6: The CMS searches for the pre-transcoding code stream collected by the corresponding lens according to the lens ID; if the required pre-transcoding code stream is not found, instruct the lens to perform real-time video capture;

S7: The CMS sends a transcoding notification to the MTU, and the transcoding notification carries a transcoding identification parameter;

S8: The MTU returns a transcoding notification response to the CMS after processing the transcoding notification;

S9: CMS replies to the client unit with a video browsing request response;

S10: The front-end collection device sends the collected real-time monitoring code stream to the VTDU as the code stream before transcoding;

S11: The VTDU sends the code stream before transcoding to the MTU.

S12: The MTU transcodes the code stream before transcoding according to the transcoding identification parameter in the transcoding notification message to form a code stream after transcoding;

S13: The MTU sends the transcoded code stream to the VTDU;

S14: The VTDU sends the transcoded code stream to the CU;

S15: The CU will receive the transcoded stream for decoding and playing;

S16: The CU presents the real-time monitoring video to the monitoring user.

In the method described in this embodiment, the front-end acquisition device is instructed by the CMS to perform real-time video acquisition, and the collected real-time monitoring bit stream is sent to the VTDU as the pre-transcoding bit stream, and then operations such as transcoding are performed. , not only can realize the reproduction and playback of the video code stream collected by the front-end acquisition equipment that has been saved, but also can perform real-time transcoding on the video code stream collected by the front-end acquisition equipment in real time, so as to realize the monitoring of the monitored location real-time monitoring.

In addition, the client unit described in the foregoing embodiments can be a fixed client unit such as a TV wall or a PC terminal, or a mobile client unit (Mobile Client Unit, MCU for short), such as a mobile terminal, a notebook computer etc. In the case of using an MCU, step 101 in the embodiment shown in FIG. 1 is specifically: the CMS in the video monitoring platform receives a video browsing request from a mobile client unit accessed through wireless access, and the video The browsing request carries a transcoding identification parameter.

Existing mobile telecom operators operate a variety of mobile communication networks, each network provides different mobile access bandwidth on the air interface, and the encoding requirements for mobile monitoring media streams are also different, so multi-channel transcoding Moreover, most of the code streams output by the encoding devices of the existing front-end acquisition equipment are aimed at fixed network monitoring services, and the code rate is generally relatively large. Although the bandwidth of the third-generation mobile communication network has been significantly improved, it still cannot meet the requirements of direct transmission and monitoring over the air interface. Requirements for video streams.

In the method described in this embodiment, when the MCU requests video monitoring, the MTU can be used for each MCU according to its specific transcoding identification parameters (such as: encoding format, resolution, frame rate, bit rate, encoding level and grade) and other parameters) for unified transcoding processing, so that it can adapt to the different requirements of different MCUs for transmitting surveillance video streams, and realize support for mobile surveillance services, that is, through dynamic transcoding, the MCU can move to watch surveillance videos, reducing the complexity of the system and implementation costs.

Embodiment Three

Embodiment 3 of the present invention also provides another monitoring video acquisition method, which can be executed by a client unit, and specifically includes the following steps:

The client unit sends a video browsing request to the video monitoring platform, the video browsing request carries a transcoding identification parameter, and may also carry identification information of the front-end acquisition device;

The client unit receives and plays the transcoded code stream sent by the video forwarding and distribution unit in the video monitoring platform or plugged into the video monitoring platform, and the transcoded code stream is based on the transcoding identifier Parameters are formed by transcoding the code stream before transcoding.

Embodiment Four

FIG. 5 is a schematic structural diagram of a video surveillance system provided by Embodiment 4 of the present invention. As shown in the figure, the system includes: a central management server 10 , a video transcoding unit 20 , a media transcoding unit 30 , a client unit 40 and a front-end acquisition device 50 . Among them, the central management server 10, the video transcoding unit 20 and the media transcoding unit 30 constitute a video monitoring platform. The front-end collection device 50 is connected to the central management server 10 and the video transcoding unit 20, and is used to collect the real-time monitoring code stream as the code stream before transcoding.

Fig. 6 is a schematic structural diagram of the central management server 10 in Fig. 5; Fig. 7 is a schematic structural diagram of the video transcoding unit 20 in Fig. 5; Fig. 8 is a schematic structural diagram of the media transcoding unit 30 in Fig. 5; Fig. 9 is A schematic structural diagram of the client unit 40 in FIG. 5 .

Wherein, the central management server 10 includes a server-side receiving module 11 , a search module 12 , a server-side sending module 13 and an instruction module 14 . The server side receiving module 11 is used for receiving the video browsing request from the client unit 40, which carries a transcoding identification parameter in the video browsing request; the search module 12 is used for identifying information of the front-end acquisition device 50 carried in the video browsing request to search for the code stream before transcoding collected by the front-end acquisition device 50; The code stream before the code is sent to the media transcoding unit 30; the instruction module 14 is used to send the transcoding notification carrying the transcoding identification parameter to the media transcoding unit 30, and instruct the media transcoding unit 30 to perform the transcoding before the transcoding according to the transcoding identification parameter. The code stream is transcoded to form a code stream after transcoding; and is used to send a code stream distribution notification to the video transcoding unit 20, instructing the video transcoding unit 20 to send the transcoded code stream obtained from the media transcoding unit 30 to the client Unit 40.

The instruction module 14 can also be used to instruct the front-end acquisition device 50 to perform real-time video acquisition when the search module 12 does not find the code stream before the transcoding, and use the collected real-time monitoring code stream as the transcoding code stream. pre-code stream.

The selection module 15 can also be set in the central management server 10, for selecting a video forwarding and distributing unit 20 according to the running status information of a plurality of video forwarding and distributing units 20 and the media transcoding units 30 connected to these video forwarding and distributing units 20 respectively and a media transcoding unit 30 connected to the video transcoding unit 20 to send the code stream before transcoding, the transcoding notification and the code stream distribution notification.

The client unit 40 includes a client-side sending module 41 and a client-side receiving module 42 . Client side sending module 41 is used to send video browsing request to video monitoring platform, and this video browsing request carries transcoding identification parameter; Client side receiving module 42 is used for receiving and playing by or video monitoring platform The transcoded code stream sent by the plug-in video transcoding unit 20, the transcoded code stream is formed by transcoding the pre-transcoded code stream according to the transcoding identification parameter.

The video forwarding and distribution unit 20 includes a distribution-side receiving module 21 and a distribution-side sending module 22 . The receiving module 21 on the distribution side is used to receive the code stream before transcoding and the code stream distribution notification from the central management server 10, and to form The code stream after transcoding, the transcoding identification parameter is obtained by the central management server 10 from the video browsing request sent by the client unit 40; the distribution side sending module 22 is used to send the code stream before the transcoding to the media transcoding unit 30, and according to the code stream distribution notification, the code stream after the transcoding is sent to the client unit 40, so that the client unit 40 can receive and play the same code stream as the transcoded code stream The transcoded code stream corresponding to the code identification parameter.

The media transcoding unit 30 includes a transcoding side receiving module 31 , a transcoding execution module 32 and a transcoding side sending module 33 . The transcoding side receiving module 31 is externally connected to the video transcoding unit 20, and is used to receive the code stream before transcoding from the video transcoding unit 20 and the transcoding code carrying the transcoding identification parameter from the central management server 10. Notice that the transcoding identification parameter is obtained by the central management server 10 from the video browsing request sent by the client unit 40; the transcoding execution module 32 is used for transcoding according to the transcoding received by the transcoding side receiving module 31 The transcoding identification parameter in the notification transcodes the received code stream before transcoding to form a code stream after transcoding; the transcoding side sending module 33 is used to convert the code stream after transcoding formed by the transcoding execution module The stream is sent to the video forwarding and distributing unit 20.

The system works as follows:

The client-side sending module 41 of the client unit 40 sends a video browsing request to the central management server 10. The video browsing request carries a transcoding identification parameter, and may also carry the identification information of the front-end acquisition device 50 selected from the monitoring resource list. , the identification information can be the lens ID of the camera, etc., and the transcoding identification parameter refers to the parameters of the code stream that can be decoded and played by the client unit 40, such as encoding format, resolution, frame rate, bit rate, encoding level and Grade and other parameters;

After the server-side receiving module 11 in the central management server 10 receives the video browsing request from the client unit 40, the search module 12 searches for the front-end acquisition device 50 according to the identification information of the front-end acquisition device 50 carried in the video browsing request. The code stream before transcoding collected by the device 50, the code stream before transcoding refers to the code stream formed by encoding the video data collected by the front-end acquisition device 50 using its own code stream parameters, for example, the camera according to its own screen The code stream obtained by encoding the code stream parameters such as size and resolution is called the code stream before transcoding, and the code stream has not been transcoded for each client unit 40;

The code stream before the transcoding found by the search module 12 is sent by the server side sending module 13 to the video forwarding and distribution unit 20;

The instruction module 14 sends a transcoding notification carrying a transcoding identification parameter to the media transcoding unit 30, and sends the pre-transcoding code stream found to the video transcoding unit 20;

The distribution side receiving module 21 of the video forwarding distribution unit 20 receives the code stream before transcoding from the central management server 10, and the code stream before the transcoding is sent to the media transcoding unit 30 by the distribution side sending module 22;

The transcoding side receiving module 31 of the media transcoding unit 30 receives the code stream before transcoding from the video transcoding unit 20 and the transcoding notification from the central management server 10;

The transcoding execution module 32 attached to the video transcoding unit 20 transcodes the received code stream before transcoding according to the transcoding identification parameter in the transcoding notification received by the transcoding receiving module 31, And form the code stream after transcoding, after the transcoding identification parameter is determined according to the instruction of client unit 40, how to carry out transcoding can adopt conventional transcoding technology to complete, and will not go into details here; send module 33 by transcoding side The transcoded code stream formed by the transcoding execution module 32 is sent to the video transcoding unit 20;

The distribution side receiving module 21 of the video transcoding unit 20 receives the transcoded code stream formed by transcoding the pre-transcoded code stream from the media transcoding unit 30 according to the transcoding identification parameter;

The instruction module 14 of the central management server 10 sends a code stream distribution notification to the video forwarding and distribution unit 20;

When the distribution side receiving module 21 of the video forwarding distribution unit 20 receives the code stream distribution notification, the distribution side sending module 22 sends the transcoded code stream according to the code stream distribution notification from the central management server 10 to the corresponding client unit 40.

The client-side receiving module 42 of the client unit 40 receives the transcoded code stream sent by the video forwarding and distribution unit 20, and reproduces the surveillance video to the surveillance user after being decoded and played.

Through the system described in this embodiment, the video monitoring method provided by the embodiment of the present invention can be executed. The specific process details can be referred to the foregoing method embodiment, and the video collected by the front-end acquisition device is realized. Since the MTU is used for Each client unit performs unified transcoding processing, thereby realizing the normalization of transcoding processing, so there is no need to design different transcoding processing processes for different client units, which simplifies the system architecture, reduces transcoding costs, and improves In order to ensure the compatibility of each device in the monitoring system, and except that the MTU needs to be installed on the VTDU, there is no need to change the topology of other devices in the system, so it is convenient for system updates and upgrades. Moreover, the dynamic transcoding method adopted in this embodiment also has outstanding technical advantages compared with the existing static transcoding method and dynamic transcoding method. For details, refer to the foregoing description, which will not be repeated here.

In addition, the central management server 10 can further be provided with a selection module 15, which is used to select a video transfer and distribution unit according to the operating status information of a plurality of video transfer and distribution units and the media transcoding units respectively connected to these video transfer and distribution units And a media transcoding unit connected to the video transcoding unit. Wherein, the operation status information includes the content distribution of the code stream before transcoding, the load status of the device, the health status of the device, and the decoding capability. Therefore, it is beneficial to optimize the VTDU and MTU.

In addition, the instruction module 14 of the central management server 10 can instruct the front-end acquisition device 50 to perform real-time video collection and use the collected real-time monitoring code stream as The code stream before the transcoding. Thus, real-time monitoring of the monitored location is realized.

Embodiment five

FIG. 10 is a schematic structural diagram of a video surveillance system provided by Embodiment 5 of the present invention. As shown in the figure, the difference from the embodiment shown in FIG. 5 is that the client unit 40 in the system shown in FIG. 10 is specifically a mobile client unit 400, and the system also includes a wireless access server 60 for Access the mobile client unit 400 in a wireless access manner, and forward the video browsing request from the mobile client unit 400 to the central management server 10 .

In the method described in this embodiment, when the MCU requests video monitoring, the MTU can be used for each MCU according to its specific transcoding identification parameters (such as: encoding format, resolution, frame rate, bit rate, encoding level and grade) and other parameters) for unified transcoding processing, so that it can adapt to the different requirements of different MCUs for transmitting surveillance video streams, and realize support for mobile surveillance services, that is, through dynamic transcoding, the MCU can move to watch surveillance videos, reducing the complexity of the system and implementation costs.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (16)

1. A video monitoring method, characterized in that, comprising: The video monitoring platform receives a video browsing request from the client unit, and the video browsing request carries a transcoding identification parameter; The video monitoring platform searches for the code stream before transcoding collected by the front-end acquisition device according to the identification information of the front-end acquisition device carried in the video browsing request; The video surveillance platform transcodes the code stream before transcoding according to the transcoding identification parameter to form a code stream after transcoding; The video surveillance platform sends the transcoded code stream to the client unit, so that the client unit can receive and play the transcoded code stream corresponding to the transcoding identification parameter. 2. The video monitoring method according to claim 1, wherein the video monitoring platform transcodes the code stream before the transcoding according to the transcoding identification parameter, and forming the code stream after transcoding includes: The central management server in the video monitoring platform sends the found pre-transcoding code stream to the video transcoding unit in the video monitoring platform, so that the video transcoding unit sends the pre-transcoding code stream to all The media transcoding unit in the video monitoring platform; In addition, the central management server sends a transcoding notification carrying the transcoding identification parameter to the media transcoding unit, so that the media transcoding unit performs the The code stream before transcoding is transcoded to form the code stream after transcoding, and sent to the video transcoding unit. 3. The video monitoring method according to claim 2, wherein the central management server sends the received code stream before transcoding to the video transcoding unit, and sends the code stream carrying the code stream to the media transcoding unit. The transcoding notification of the transcoding identification parameter includes: The central management server selects a video transfer and distribution unit and a media transcoding unit connected to the video transfer and distribution unit according to the operating status information of a plurality of video transfer and distribution units and the media transcoding units respectively connected to these video transfer and distribution units. unit; The central management server sends the code stream before transcoding to the selected video transcoding unit, and sends the transcoding notification to the selected media transcoding unit. 4. The video monitoring method according to claim 1, wherein the video monitoring platform sends the code stream after the transcoding to the client unit comprising: The central management server in the video monitoring platform sends a code stream distribution notification to the video forwarding and distributing unit in the video monitoring platform, so that the video forwarding and distributing unit sends the transcoded code stream according to the code stream distribution notice sent to the client unit. 5. The video monitoring method according to claim 1, wherein, after the video monitoring platform searches for the code stream before transcoding collected by the front-end acquisition device, it also includes: When the video monitoring platform does not find the pre-transcoding code stream, instruct the front-end acquisition device to collect real-time video, and use the collected real-time monitoring code stream as the pre-transcoding code stream. 6. The video monitoring method according to claim 1, wherein the video monitoring platform transcodes the code stream before the transcoding according to the transcoding identification parameter, and forming the code stream after transcoding includes: The video monitoring platform transcodes the code stream before transcoding according to the transcoding identification parameters through the media transcoding unit plugged into the video transcoding unit of the video monitoring platform to form a code stream after transcoding . 7. The video monitoring method according to any one of claims 1 to 6, wherein the video monitoring platform receiving a video browsing request from a client unit comprises: The video monitoring platform receives a video browsing request from a mobile client unit accessed through wireless access. 8. A surveillance video acquisition method, characterized in that, comprising: The client unit sends a video browsing request to the video monitoring platform, and the video browsing request carries a transcoding identification parameter; The client unit receives and plays the transcoded code stream sent by the video forwarding and distribution unit in the video monitoring platform or plugged into the video monitoring platform, and the transcoded code stream is based on the transcoding identifier Parameters are formed by transcoding the code stream before transcoding. 9. A central management server, characterized in that, comprising: The server-side receiving module is used to receive a video browsing request from the client unit, and the video browsing request carries a transcoding identification parameter; A search module, configured to search for the code stream before transcoding collected by the front-end capture device according to the identification information of the front-end capture device carried in the video browsing request; The sending module on the server side is configured to send the pre-transcoding stream found by the search module to the video transcoding unit, so that the video transcoding unit sends the pre-transcoding stream to the media transcoding unit ; An instruction module, configured to send a transcoding notification carrying a transcoding identification parameter to the media transcoding unit, instructing the media transcoding unit to transcode the pre-transcoding code stream according to the transcoding identification parameter to form Transcoded code stream; and for sending a code stream distribution notification to the video transcoding unit, instructing the video transcoding unit to send the transcoded code stream obtained from the media transcoding unit to the client end unit. 10. The central management server according to claim 9, further comprising: The selection module is used to select a video transfer and distribution unit and a media transcoder connected to the video transfer and distribution unit according to the operating status information of a plurality of video transfer and distribution units and the media transcoding units respectively connected to these video transfer and distribution units The unit sends the code stream before transcoding, the transcoding notification and the code stream distribution notification. 11. The central management server according to claim 9, wherein the instruction module is further configured to instruct the front-end acquisition device to perform real-time video acquisition when the search module does not find the code stream before transcoding, The collected real-time monitoring bit stream is used as the pre-transcoding bit stream. 12. A client unit, comprising: The client-side sending module is used to send a video browsing request to the video monitoring platform, and the video browsing request carries a transcoding identification parameter; The client side receiving module is used to receive and play the transcoded code stream sent by the video distribution unit in the video surveillance platform or the video surveillance platform plug-in, and the transcoded code stream is according to the The transcoding identification parameter is formed by transcoding the code stream before transcoding. 13. A video forwarding and distribution unit, characterized in that, comprising: The receiving module on the distribution side is used to receive the code stream before transcoding and the code stream distribution notification from the central management server, as well as the transcoding code stream formed by the media transcoding unit according to the transcoding identification parameter. Coded code stream, the transcoding identification parameter is obtained by the central management server from the video browsing request sent by the client unit; A sending module on the distribution side, configured to send the code stream before transcoding to the media transcoding unit, and send the code stream after transcoding to the client unit according to the code stream distribution notification, so that The client unit is capable of receiving and playing the transcoded stream corresponding to the transcoding identification parameter. 14. A media transcoding unit, comprising: The receiving module on the transcoding side is connected to the video transcoding unit, and is used to receive the code stream before transcoding from the video transcoding unit and the transcoding notification carrying the transcoding identification parameter from the central management server. The transcoding identification parameter is obtained by the central management server from the video browsing request sent by the client unit; A transcoding execution module, configured to transcode the received code stream before transcoding according to the transcoding identification parameter in the transcoding notification received by the receiving module at the transcoding side, and form a code stream after transcoding; The transcoding side sending module is configured to send the transcoded code stream formed by the transcoding execution module to the video transcoding unit. 15. A central management server as claimed in any one of claims 9 to 11, a client unit as claimed in claim 12, a video forwarding and distributing unit as claimed in claim 13, and a video distribution unit as claimed in claim 14, which are connected in communication with each other. The video monitoring system of the media transcoding unit is characterized in that it also includes: a front-end collection device connected to the central management server and the video transcoding unit for collecting real-time monitoring code stream as the code stream before transcoding. 16. The video monitoring system according to claim 15, wherein the client unit is a mobile client unit, and the system also includes a wireless access server for accessing the mobile client in a wireless access mode unit, and forward the video browsing request from the mobile client unit to the central management server.

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