CN114442981B

CN114442981B - Display management method, display management device and management equipment

Info

Publication number: CN114442981B
Application number: CN202210096638.4A
Authority: CN
Inventors: 马晓婷; 何月朋; 黄建
Original assignee: Hangzhou Lianji Technology Co ltd
Current assignee: Hangzhou Lianji Technology Co ltd
Priority date: 2022-01-26
Filing date: 2022-01-26
Publication date: 2024-02-13
Anticipated expiration: 2042-01-26
Also published as: CN114442981A

Abstract

The application discloses a display management method, a display management device, a management apparatus, and a computer-readable storage medium. Wherein the management device comprises at least two video outlets, the method comprising: acquiring the connection state of each video output port of the management equipment; determining a main screen output port and at least one auxiliary screen output port in the at least two video output ports according to the connection state based on a preset main screen and auxiliary screen selection strategy; and initializing connection of the main screen and the auxiliary screen to realize multi-screen display of the management equipment, wherein the main screen is display equipment connected with an output port of the main screen, and the auxiliary screen is display equipment connected with an output port of the auxiliary screen. According to the method and the device for managing the home screen and the secondary screen, the management device can be helped to automatically judge the relationship between the home screen and the secondary screen, and flexible setting of the relationship between the home screen and the secondary screen is achieved.

Description

Display management method, display management device and management equipment

Technical Field

The application belongs to the technical field of equipment management, and particularly relates to a display management method, a display management device, management equipment and a computer readable storage medium.

Background

Most of the existing video equipment supporting multi-screen display cannot automatically judge the relation between the main screen and the auxiliary screen, so that the problem of multi-screen display is caused. For example, on a network video recorder (Network Video Recorder, NVR) supporting multi-screen display, when a user connects only a part of the display device, since the relationship between the primary and secondary screens is unknown, the NVR does not know which video outlet is connected to the primary screen and which video outlet is connected to the secondary screen, so that it cannot enter the user operation page correctly, resulting in poor user experience.

Disclosure of Invention

The application provides a display management method, a display management device, management equipment and a computer readable storage medium, which can help the management equipment in a video monitoring system to automatically judge the relationship between a main screen and a sub screen, and realize flexible setting of the relationship between the main screen and the sub screen.

In a first aspect, the present application provides a display management method, applied to a management device in a video monitoring system, where the management device includes at least two video output ports; the display management method comprises the following steps:

acquiring the connection state of each video output port of the management equipment;

determining a main screen output port and at least one auxiliary screen output port from the at least two video output ports according to the connection state based on a preset main screen and auxiliary screen selection strategy;

And initializing connection of a main screen and an auxiliary screen to realize multi-screen display of the management equipment, wherein the main screen is display equipment connected with an output port of the main screen, and the auxiliary screen is display equipment connected with the output port of the auxiliary screen.

In a second aspect, the present application provides a display management apparatus, applied to a management device in a video monitoring system, where the management device includes at least two video output ports; the display management device includes:

the acquisition module is used for acquiring the connection state of each video output port of the management equipment;

the determining module is used for determining a main screen output port and at least one auxiliary screen output port from the at least two video output ports according to the connection state based on a preset main screen and auxiliary screen selection strategy;

and the initialization module is used for initializing connection of a main screen and an auxiliary screen so as to realize multi-screen display of the management equipment, wherein the main screen is display equipment connected with an output port of the main screen, and the auxiliary screen is display equipment connected with an output port of the auxiliary screen.

In a third aspect, the present application provides a management device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the method of the first aspect when executing the computer program.

In a fourth aspect, the present application provides a computer readable storage medium storing a computer program which, when executed by a processor, performs the steps of the method of the first aspect described above.

In a fifth aspect, the present application provides a computer program product comprising a computer program which, when executed by one or more processors, implements the steps of the method of the first aspect described above.

Compared with the prior art, the beneficial effects that this application exists are: when the management equipment in the video monitoring system needs to determine the relation between the main screen and the auxiliary screen, the connection state of each video output port of the management equipment can be acquired first, and then one main screen output port and at least one auxiliary screen output port are determined according to the connection state under the guidance of a preset main screen and auxiliary screen selection strategy. It can be understood that the display device connected to the output port of the main screen is the main screen, and the display device connected to the output port of the auxiliary screen is the auxiliary screen. After the connection initialization of the main screen and the auxiliary screen is completed, the main screen and the auxiliary screen can be put into display use, so that the multi-screen display of the management equipment can be realized. According to the scheme, the primary and secondary screen selection strategy is associated with the connection state of the video output port, management equipment (such as NVR equipment) can be helped to automatically judge the primary and secondary screen relationship, and flexible setting of the primary and secondary screen relationship is achieved.

It will be appreciated that the advantages of the second to fifth aspects may be found in the relevant description of the first aspect, and are not described here again.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly introduce the drawings that are needed in the embodiments or the description of the prior art, it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic implementation flow chart of a display management method provided in an embodiment of the present application;

fig. 2 is a block diagram of a display management apparatus provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of a management device according to an embodiment of the present application.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system configurations, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

In order to illustrate the technical solutions proposed in the present application, the following description is made by specific embodiments.

The embodiment of the application provides a display management method which can be applied to management equipment with at least two video output ports in a video monitoring system. Typically, the different video outlets of the management device are of different types. By way of example only, this type includes a high definition multimedia interface (High Definition Multimedia Interface, HDMI), a video graphics array (Video Graphics Array, VGA) interface, a digital video interface (Digital Visual Interface, DVI), a Display interface (DP), and the like, and is not limited herein as to the type of video output Port that can be provided by the management device. For a management device having at least two video output ports, when a primary screen and a secondary screen are selected, only a display device connected to one video output port is generally defined as the primary screen, and display devices connected to the other video output ports are all secondary screens. That is, when the management apparatus performs multi-screen display, the number of main screens is usually one, and the number of sub screens may be more than one.

In some examples, the management device may be an NVR, or may be other devices capable of managing a network Camera (IPC), such as a video management server (Video Management System, VMS), etc., and the specific type of the management device is not limited herein.

The display management method according to the embodiment of the present application will be described below by taking an NVR as an example of a management device.

Referring to fig. 1, the implementation flow of the display management method is described in detail as follows:

step 101, obtaining the connection state of each video output port of the NVR.

If the NVR needs to perform multi-screen display and the primary and secondary screens are not determined at the moment, the connection state of each video output port of the NVR can be acquired first. That is, when the primary and secondary screen relationship needs to be determined, the connection state of each video output port of the NVR may be obtained first. The connection state comprises a connected state and an unconnected state. The connected state means that the video output port is connected with the corresponding display device, i.e. the video output port is connected. The unconnected state means that the video output port is not connected with the corresponding display device, i.e. the video output port is not connected.

Step 102, determining a main screen output port and at least one auxiliary screen output port in at least two video output ports according to the connection state based on a preset main screen and auxiliary screen selection strategy.

In order to achieve flexible setting of the primary screen and the secondary screen, the embodiment of the application sets the primary screen and the secondary screen selection strategy in advance based on various possible conditions of connection states of all video output ports of the NVR. Therefore, under the guidance of the primary and secondary screen selection strategy, according to the connection state of each video output port obtained currently, a unique primary screen output port is determined, and obviously, all other video output ports except the primary screen output port can be determined as secondary screen output ports.

In some embodiments, depending on the connection status of the various video outlets of the NVR, the following three cases can be roughly classified:

(1) All video output ports are in an unconnected state; that is, all video outlets are not connected with a corresponding display device.

(2) Only one video output port is in a connected state, and the other video output ports are in an unconnected state; that is, only one video output port is connected with a corresponding display device, and the other video output ports are not connected with the corresponding display devices.

(3) N video outlets are in a connected state, N is more than 1 and less than or equal to M, and M is the total number of video outlets of NVR; that is, there are a plurality (but may be all) of video outlets to which the corresponding display devices are connected.

Based on the above three different situations, the primary and secondary screen selection policies can be set as follows:

aiming at the condition (1), the NVR cannot immediately determine the main screen output port and the auxiliary screen output port. Which monitors the connection status of the various video outlets. Once it is monitored that a certain video output port is firstly switched from an unconnected state to a connected state, that is, the video output port is connected with a corresponding display device for the first time, the video output port can be determined to be a main screen output port, and the remaining other video output ports are determined to be auxiliary screen output ports.

For case (2), the NVR may determine the only one video outlet in the connected state as the primary screen outlet and the remaining other video outlets as the secondary screen outlets.

For the case of (3), the NVR may determine the video output port with the highest priority among the N video output ports in the connected state as the primary screen output port, and determine the remaining other video output ports as the secondary screen output ports. The user can set corresponding priorities for different types of video output ports in advance and form a priority list. The NVR may thus obtain the priorities corresponding to the N video outlets, respectively, through the priority list. Of course, this priority list may also be subsequently changed by the user; or may be intelligently modified based on the specific connection situation of the NVR, i.e., the priority list may be dynamically adjusted, and is not limited herein.

In some embodiments, the dynamic adjustment of the priority of the video outlets may be achieved specifically by:

in the current display period, counting the connected time length of each video output port, wherein the connected time length is specifically as follows: the video output port is connected with the duration of the corresponding display device.

At the end of the current display period, the priority of each type of video output port is reset based on the connected time length, specifically: the priority list is updated based on the connected time period. Generally, the longer the connected duration of a certain video outlet, the longer the service time of the display device connected to the video outlet in the display period, that is, the more commonly used the video outlet of the type; conversely, the shorter the connected duration of a certain video outlet, the shorter the usage time of the display device to which the video outlet is connected in the display period, that is, the less commonly used the video outlet of the type. Based on this, after the end of the current display period, the type of the video output port with the longest connected duration may be reset to the highest priority, and similarly, the type of the video output port with the shortest connected duration may be reset to the lowest priority.

In some examples, where the NVR has four video outlets, and the four video outlets are of the four types HDMI, VGA, DVI and DP, respectively, the priority list may be formed as follows

Table 1 shows:

the type of video output port	Priority level
		HDMI	First level
DP	Second-level
		DVI	Three stages
VGA	Four-stage

TABLE 1

Wherein, the first level is the highest priority, the second level is the next highest priority, the third level is the next lowest priority, and the fourth level is the lowest priority.

For ease of understanding, the three cases set forth above are explained and illustrated by way of simple examples based on table 1:

assuming that at the time of T0, the NVR needs to select the primary and secondary screens, and obtain the connection states of the four video output ports at the time of T0.

If the four video output ports are all in the unconnected state at the time of T0, the NVR monitors the connection state of the four video output ports, which belongs to the (1) case. If at the time of T1, the NVR monitors that the HDMI video output port is first switched from the unconnected state to the connected state, it may determine that: the HDMI video output port is a main screen output port, and the DP video output port, the DVI video output port and the VGA video output port are all auxiliary screen output ports.

If the DP video output is in the connected state, and the HDMI video output, the DVI video output, and the VGA video output are all in the disconnected state, at the time T0, the method belongs to the (2) case, and can determine: the DP video output port is a main screen output port, and the HDMI video output port, the DVI video output port and the VGA video output port are auxiliary screen output ports.

If the DP video output port and the VGA video output port are in the connected state in the four video output ports at the time of T0, the HDMI video output port and the DVI video output port are in the unconnected state, and the condition (3) is met. Based on table 1, the priority of the DP video output is two, the priority of the VGA video output is four, and the priority of the DP video output is higher than the priority of the VGA video output, so that it can be determined that: the DP video output port is a main screen output port, and the HDMI video output port, the DVI video output port and the VGA video output port are auxiliary screen output ports.

It will be appreciated that after the primary and secondary screen output ports are determined, the primary and secondary screen output ports typically remain unchanged, except when the primary and secondary screen relationships need to be redetermined. That is, unless steps 101 and 102 are re-performed, the primary screen output and the secondary screen output remain unchanged.

And 103, initializing connection of the main screen and the auxiliary screen to realize multi-screen display of the NVR, wherein the main screen is display equipment connected with an output port of the main screen, and the auxiliary screen is display equipment connected with an output port of the auxiliary screen.

It will be appreciated that for any video outlet, whether the video outlet is a primary or secondary screen outlet, the operation of connection initialization of the display device is required as long as the video outlet is connected to the corresponding display device and the display device has not been initialized by the NVR.

In some embodiments, taking any display device to be initialized as an example, the specific flow of connection initialization is as follows:

first, an available resolution of the display device, which is a resolution that the display device can support, is acquired. In general, display devices may support a variety of different resolutions. After the display device accesses the NVR through the corresponding video output port, the NVR can acquire all the resolution conditions supported by the display device.

The NVR may then configure the resolution of the display device. In general, there are two resolution configuration modes commonly used for NVR, i.e., manual mode and automatic mode. In manual mode, the NVR may configure the resolution of the display device to a user-set resolution (which the display device is required to be capable of supporting). In the auto mode, the NVR may configure the resolution of the display device to be the maximum resolution among the available resolutions, that is, the resolution of the display device to be the maximum resolution supported thereby to achieve the optimal display effect of the display device. In the embodiment of the application, the default NVR resolution configuration mode adopts an automatic mode.

Finally, memory may be allocated for the display device based on the resolution configured for the display device at this time. Specifically, the size of the memory allocated to the display device can be calculated by the following formula: memory size allocated to display device = resolution x bit width with which the display device is configured. For example only, in the ARGB8888 format, the bit width is 32 bits.

After the initialization of each accessed display device is completed, the NVR can establish a corresponding decoding channel for each display device according to the display requirement of the NVR, so that each display device can display a corresponding video code stream through the corresponding decoding channel, and multi-screen display of the NVR is realized.

It should be noted that after the primary and secondary screen relationships are determined (after the primary and secondary screen output ports are determined), normal hot plug of the display device does not affect the primary and secondary screen relationships. In fact, under the condition that the relation between the primary screen and the secondary screen is known, aiming at the unplugging operation of the display equipment, the operation does not have any influence on NVR, namely, a decoding channel corresponding to the unplugged display equipment can be reserved; for an insertion operation of a display device, the NVR may immediately determine whether the display device is a main screen or a sub-screen according to a known main-sub-screen relationship, and then may perform a connection initialization operation for the display device. After the initialization is completed, if the display device has a corresponding decoding channel, the corresponding display content (the main screen display content or the auxiliary screen display content) can be mapped to the display device for display directly through the decoding channel. Otherwise, after initialization is completed, if the display device does not have a corresponding decoding channel, the corresponding decoding channel can be established first, and then the corresponding display content (the main screen display content or the auxiliary screen display content) is mapped to the display device for display through the decoding channel.

The hot plug of the display device is equivalent to the hot plug of the corresponding video output port, and can be specifically determined by checking the video output port through a Linux system kernel of the NVR to perform hot plug detection. After the Linux kernel detects the hot plug event of the video output port, the Linux kernel can inform an application layer of the hot plug event so as to trigger a hot plug script. The hot plug script can detect the connection state of the video output port. That is, the purpose of the hot plug detection can be considered as actually: and monitoring the connection state of the display equipment in real time.

In some embodiments, the NVR initiates a screen management process to implement overall management of the display devices accessed by the NVR. It can be understood that the screen management process is actually a background task for managing various operations such as User Interface (UI) display, decoding, primary and secondary screen selection, and particularly manages various information such as connection status, primary and secondary screen selection result, primary and secondary screen resolution, decoding, and display status. In some special cases, an exception (e.g., a dropped line) may occur to the screen management process. In this case, all the information managed by the screen management process will be lost. The remedial action by the NVR when an abnormality occurs in the screen management process in the case where the primary-secondary screen relationship has been determined is described below:

In one application scenario, the multi-screen display of the NVR may be a homologous display, where the homologous display specifically refers to: the main screen and the auxiliary screen display the same content. That is, the primary and secondary screens multiplex the same decoding channel.

In view of the fact that the same content is displayed by different display devices in the case of the homologous display, and the display should be performed as long as the display device is accessed, when there is an abnormality in the screen management process, the screen management process may be restarted, and after the screen management process is restarted, the steps 101 and subsequent steps are performed back. That is, in the application scenario of homologous display, once the screen management process is abnormal, the relationship between the primary screen and the secondary screen can be redetermined according to the current connection state of each video output port. Even if the redetermined primary and secondary screen relationships are different from the previously determined primary and secondary screen relationships, the output of the display content is not affected because the content displayed by the primary and secondary screens is completely consistent.

For example, the NVR has determined that the primary screen output is a DVI video output, and the secondary screen output is an HDMI video output, a VGA video output, and a DP video output based on the connection status of each video output at the time T0. The NVR establishes a corresponding decoding channel for the DVI display device, denoted as a DVI decoding channel, and the DVI decoding channel is multiplexed with other display devices.

From time T0 to time T1, the NVR is connected with a DVI display device, a VGA display device and a DP display device, and then the three display devices display the same content through the established DVI decoding channel in the period of time.

At time T1, the DVI display device is unplugged and the HDMI display device is accessed. As already described above, the removal of the display device does not affect the established decoding channel. Thus, from time T1, the HDMI display device, DP display device, and VGA display device all still display the same content through the established DVI decoding channel.

At the time of T2, the screen management process is abnormal, at this time, the NVR can restart the screen management process, and after the screen management process is restarted, the main screen output port and the auxiliary screen output port are redetermined based on the connection state of each video output port at this time (approximately at the time of T2). The HDMI video output port, VGA video output port, and DP video output port are all connected at this time (approximately at time T2), and thus belong to the aforementioned case (3). According to the priorities shown in table 1, the primary screen output port is an HDMI video output port, and the secondary screen output port is a VGA video output port and a DP video output port. At this time, since the main screen output port is an HDMI video output port and the HDMI display device (i.e., main screen) is connected, the NVR can establish a decoding channel corresponding to the HDMI display device (i.e., main screen) based on the current main screen output port, and record the decoding channel as an HDMI decoding channel, and the HDMI decoding channel is multiplexed with other display devices.

Thus, it can be seen that, due to the abnormality of the screen management process, the NVR performs the redetermining of the primary and secondary screen relationships, that is, redetermining the primary screen output port and the secondary screen output port. However, since the display is an application scene with the same source, the primary screen and the secondary screen display the same content regardless of the change of the relationship between the primary screen and the secondary screen. Thus, the redetermining of the primary and secondary screen relationship does not affect what is displayed by the primary and secondary screens. That is, in the application scenario of the homologous display, after the screen management process is restarted due to the abnormality, the NVR may still remain normally displayed.

In another application scenario, the multi-screen display of the NVR is specifically a heterogeneous display, where the heterogeneous display specifically refers to: the main screen and the sub-screen display different contents. That is, the primary screen and the secondary screen have respective decoding channels.

In view of the situation of heterogeneous display, different display devices display different contents, so that in order to ensure consistency and consistency of the contents displayed before and after each display device, when the screen management process is abnormal, the NVR can restart the screen management process and read a backup file in the memory after restarting the screen management process, wherein the backup file records the identification of the primary screen output port and the identification of the secondary screen output port which are determined before. Therefore, by reading the backup file, the NVR can know the identification of the output port of the main screen and the identification of the output port of the auxiliary screen, and the output port of the main screen and the output port of the auxiliary screen are determined from at least two video output ports of the NVR. It can be understood that the determined primary screen output port and secondary screen output port at this time are unchanged from the primary screen output port and secondary screen output port determined before the screen management process is abnormal. Thereafter, the NVR may return to executing step 103 to resume the multi-screen display of the NVR.

It can be understood that in the heterogeneous display scenario, after the primary and secondary screen relationship is determined for the first time in the current running process of the NVR, a backup file can be created in the memory, and the primary and secondary screen relationship can be written into the backup file. That is, in the heterogeneous display scenario, after step 101 and step 102 are executed for the first time in the current running process of the NVR, the identifier of the primary screen output port and the identifier of the secondary screen output port determined by executing step 102 may be written into the backup file, so as to be used as a backup of the primary screen relationship and be called and read after the screen management process is restarted.

For example, take NVR with two video outlets (HDMI video outlet and VGA video outlet respectively) as an example:

and at the time of T0, the VGA video output port is in a connected state, and the HDMI video output port is in an unconnected state, so that the main screen output port can be determined to be the VGA video output port, and the auxiliary screen output port is the HDMI video output port. At this time, a backup file may be newly created in the memory, and recorded in the backup file: the main screen output port is a VGA video output port, and the auxiliary screen output port is an HDMI video output port. And, since the VGA display device has been accessed at this time, the VGA display device can start displaying the main screen content, denoted as content 1.

At time T1, the HDMI display device is switched on, which may then begin displaying the secondary screen content, denoted content 2.

At the time of T2, the screen management process is abnormal, at the moment, the NVR restarts the screen management process, and the backup file is read to acquire that the main screen output port is a VGA video output port and the auxiliary screen output port is an HDMI video output port. The VGA display device can continue to display the main screen content, i.e. continue to display content 1. The HDMI display device may continue to display the sub-screen content, i.e., continue to display content 2.

Thus, it can be seen that although the screen management process is abnormal, the NVR can learn from the backup file that the primary screen output port and the secondary screen output port before the screen management process is abnormal after restarting the screen management process, so that different display devices can resume outputting the content that should be displayed by the different display devices. Because the backup file exists in the memory and the data in the memory is eliminated after power failure, the NVR can not be caused to enter the main screen operation interface correctly due to the history main and auxiliary screen relation of the NVR after restarting.

The necessity of the above-described remedial measures is described below in specific counterexamples to facilitate understanding.

In the application scenario of the homologous display, if the screen management process is abnormal, if the execution of step 101 and the subsequent steps is not returned, but the backup file is read as in the application scenario of the heterologous display, and the relationship between the primary screen and the secondary screen before the abnormality occurs in the screen management process is reserved, the following situation may occur in the example shown in the application scenario of the homologous display:

based on the connection state of each video output port at the time of T0, the NVR determines that the main screen output port is a DVI video output port, and the auxiliary screen output port is an HDMI video output port, a VGA video output port and a DP video output port. The NVR establishes a corresponding decoding channel for the DVI display device, denoted as a DVI decoding channel, and the DVI decoding channel is multiplexed with other display devices.

At the time of T2, the screen management process is abnormal, and after restarting the screen management process, the NVR reads that the main screen output port is a DVI video output port through the backup file, and the auxiliary screen output port is an HDMI video output port, a VGA video output port and a DP video output port. However, since the established DVI decoding channel is destroyed due to the abnormality of the screen management process and the DVI video output port is in an unconnected state at this time, the NVR cannot establish the decoding channel corresponding to the home screen based on the current home screen output port (because the home screen is unconnected). This causes an abnormality in the display of NVR.

In the application scenario of heterogeneous display, when the screen management process is offline, if the backup file is not read, the primary and secondary screen relationship before the abnormality of the screen management process is not reserved, but the execution step 101 and the subsequent steps are returned as in the application scenario of the same-frequency display, the following situation may occur in the example shown in the application scenario of heterogeneous display:

and at the time of T0, the VGA video output port is in a connected state, and the HDMI video output port is in an unconnected state, so that the main screen output port can be determined to be the VGA video output port, and the auxiliary screen output port is the HDMI video output port. Since the VGA display device has been switched in at this time, the VGA display device can start displaying the main screen content, denoted content 1.

At the time of T2, the screen management process is abnormal, at this time, the NVR restarts the screen management process, and the main screen output port and the auxiliary screen output port are redetermined based on the connection state of each video output port at this time (approximately at the time of T2). The HDMI video output port and the VGA video output port are both in the connected state at this time (approximately at the time T2), and thus belong to the aforementioned case (3). According to the priorities shown in table 1, the primary screen output port is an HDMI video output port, and the secondary screen output port is a VGA video output port. Thus, the HDMI display device starts to display the main screen content as the main screen, that is, the HDMII starts to display content 1; the VGA display device starts to display the content of the sub-screen as a sub-screen, i.e. the VGA starts to display the content 2. The VGA display device and the HDMI display device are interchanged with each other before the screen management process is abnormal, which obviously affects the video viewing experience of the user.

In some embodiments, the execution timing of the display management method may be: when the NVR is started, or when the NVR has a video code stream to be output (i.e., the video code stream comes in). In real life, steps 101-103 are performed entirely, typically when the NVR is started; in addition, in order to avoid the situation that in a special case, some steps are not executed correctly and cause a display error, when there is a video code stream to be output (i.e. when the video code stream arrives), the NVR may sequentially determine whether the current primary and secondary screen relationship has been selected and whether each accessed display device has been initialized. That is, the latter execution timing can be considered as a supplement to the former execution timing.

For example, steps 101-103 may be performed sequentially at the start of the NVR under normal conditions. That is, normally, the primary and secondary screen relationship should have been selected and each accessed display device should have been initialized. However, problems may occur during the execution of the steps, resulting in that part of the steps are not performed correctly, so that the primary and secondary screen relationship is not selected and/or that the accessed display device is not initialized.

As a further guarantee, when there is a video code stream to be output, the NVR can sequentially detect whether the primary and secondary screen relationship has been selected and whether each accessed display device has been initialized.

If the NVR detects that the relation between the main screen and the auxiliary screen is not selected when the video code stream to be output exists, executing the step 101 and the following steps under the application scene of homologous display; or under the application scene of heterogeneous display, if the backup file recorded with the identification of the output port of the main screen and the identification of the output port of the auxiliary screen does not exist, executing the step 101 and the subsequent steps at the moment; or under the application scene of heterogeneous display, if the backup file recorded with the identification of the main screen output port and the identification of the auxiliary screen output port exists, the main screen output port and the auxiliary screen output port can be determined based on the backup file at the moment, and step 103 is executed.

Similarly, if NVR detects that there are some accessed display devices that have not yet been initialized, then connection initialization operations may be performed on those display devices that have not yet been initialized, i.e., operations similar to step 103 may be performed at this time.

Therefore, the video code stream to be output can be accurately output and displayed by the NVR.

That is, each step in the display management method provided in the embodiment of the present application may be triggered and executed sequentially when the NVR is started; of course, as a further guarantee, some or all of the steps in the display management method provided in the embodiments of the present application may also be triggered to be executed when the NVR has a video code stream to be output if necessary. As described above, this necessity refers to: the current primary and secondary screen relationship is not selected and/or there are accessed display devices that are not initialized.

From the above, when the management device in the video monitoring system needs to determine the relation between the primary screen and the secondary screen, the connection state of each video output port of the management device can be obtained first, and then one primary screen output port and at least one secondary screen output port are determined according to the connection state under the guidance of the preset primary screen and secondary screen selection strategy. It can be understood that the display device connected to the output port of the main screen is the main screen, and the display device connected to the output port of the auxiliary screen is the auxiliary screen. After the connection initialization of the main screen and the auxiliary screen is completed, the main screen and the auxiliary screen can be put into display use, so that the multi-screen display of the management equipment can be realized. According to the scheme, the primary and secondary screen selection strategy is associated with the connection state of the video output port, so that the management equipment can be helped to automatically judge the primary and secondary screen relationship, and the flexible setting of the primary and secondary screen relationship is realized. In addition, aiming at the problem of abnormal screen management process, the application scene of homologous display and the corresponding remedial measures under the application scene of heterologous display are provided, so that the stability of the management equipment is improved.

Corresponding to the display management method provided above, the embodiment of the application also provides a display management device. The display management device is integrated with a management apparatus comprising at least two video outlets. Referring to fig. 2, the display management apparatus 200 includes:

an obtaining module 201, configured to obtain a connection state of each video output port of the management device;

a determining module 202, configured to determine, based on a preset primary and secondary screen selection policy, a primary screen output port and at least one secondary screen output port from the at least two video output ports according to the connection status;

and the initialization module 203 is configured to perform connection initialization on a main screen and an auxiliary screen, so as to implement multi-screen display of the management device, where the main screen is a display device connected to an output port of the main screen, and the auxiliary screen is a display device connected to an output port of the auxiliary screen.

Optionally, if the primary screen and the secondary screen are displayed in a homologous manner, the display management device 200 further includes:

the first restarting module is used for restarting the screen management process if the screen management process is abnormal;

the acquiring module 201 is triggered to run again after the first restarting module restarts the screen management process.

Optionally, if the main screen and the sub screen are displayed in a heterogeneous manner, the display management device 200 further includes:

the second restarting module is used for restarting the screen management process if the screen management process is abnormal;

the reading module is used for reading the backup file in the memory after the screen management process is restarted, wherein the backup file records the identification of the main screen output port and the identification of the auxiliary screen output port;

the determining module 202 is further configured to determine the primary screen output port and the secondary screen output port from the at least two video output ports based on the identifier of the primary screen output port and the identifier of the secondary screen output port read from the backup file;

the obtaining module 201 determines, by the determining module 202, the primary screen output port and the secondary screen output port from the at least two video output ports based on the identifier of the primary screen output port and the identifier of the secondary screen output port read from the backup file, and then triggers the operation again.

a new module, configured to create a backup file in the memory after determining, by the determining module 202, one primary screen output port and at least one secondary screen output port from the at least two video output ports according to the connection state based on a preset primary screen and secondary screen selection policy;

And the writing module is used for writing the identification of the output port of the main screen and the identification of the output port of the auxiliary screen in the backup file.

Optionally, the determining module 202 includes:

the first determining unit is used for monitoring the connection state of all the video output ports if all the video output ports are not connected with the corresponding display devices, determining the monitored first video output port connected with the corresponding display device as a main screen output port and determining the rest video output ports as auxiliary screen output ports;

the second determining unit is used for determining one video output port connected with the corresponding display device as a main screen output port and determining the other video output ports as auxiliary screen output ports if only one video output port is connected with the corresponding display device;

and a third determining unit, configured to determine, if N video output ports are connected to corresponding display devices, the video output port with the highest priority among the N video output ports as a primary screen output port, and determine the remaining video output ports as secondary screen output ports, where N is an integer greater than 1 and less than or equal to the total number of the video output ports.

Optionally, the acquiring module 201 is triggered to run when the management device is started; or, the acquisition module 201 is triggered to run when the management device has a video code stream to be output.

Optionally, the initializing module 203 includes:

a resolution obtaining unit, configured to obtain an available resolution of a display device to be initialized, where the available resolution is a resolution that can be supported by the display device;

a resolution configuration unit configured to configure a resolution of the display device to a maximum resolution among the available resolutions;

and the memory allocation unit is used for allocating memory for the display equipment based on the maximum resolution.

Corresponding to the display management method provided above, the embodiment of the application also provides a management device in the video monitoring system, where the management device includes at least two video output ports. Referring to fig. 3, the management apparatus 3 in the embodiment of the present application includes: a memory 301, one or more processors 302 (only one shown in fig. 3) and computer programs stored on the memory 301 and executable on the processors. Wherein: the memory 301 is used for storing software programs and units, and the processor 302 executes various functional applications and diagnoses by running the software programs and units stored in the memory 301 to obtain the resources corresponding to the preset events. Specifically, the processor 302 implements the following steps by running the above-described computer program stored in the memory 301:

In a second possible implementation provided by the first possible implementation, if the primary screen and the secondary screen are displayed in a homologous manner, after the initializing the connection between the primary screen and the secondary screen, the processor 302 further implements the following steps by executing the computer program stored in the memory 301:

if the screen management process is abnormal, restarting the screen management process, and returning to execute the step of acquiring the connection state of each video output port of the management device and the subsequent steps after restarting the screen management process.

In a third possible implementation manner provided by the first possible implementation manner, if the primary screen and the secondary screen are displayed in a heterogeneous manner, after the initializing the connection between the primary screen and the secondary screen, the processor 302 further implements the following steps when executing the computer program stored in the memory 301:

restarting the screen management process if the screen management process is abnormal, and reading a backup file in a memory after restarting the screen management process, wherein the backup file records the identification of the main screen output port and the identification of the auxiliary screen output port;

Determining the main screen output port and the auxiliary screen output port in the at least two video output ports based on the identification of the main screen output port and the identification of the auxiliary screen output port read from the backup file;

and returning to execute the step of initializing the connection of the main screen and the auxiliary screen.

In a fourth possible implementation manner provided by the first possible implementation manner, if the primary screen and the secondary screen are displayed in a heterogeneous manner, after determining one primary screen output port and at least one secondary screen output port from the at least two video output ports according to the connection state based on the preset primary and secondary screen selection policy, the processor 302 further implements the following steps when executing the computer program stored in the memory 301:

newly creating a backup file in the memory;

and writing the identification of the output port of the main screen and the identification of the output port of the auxiliary screen in the backup file.

In a fifth possible implementation manner provided by the first possible implementation manner, the second possible implementation manner, the third possible implementation manner, or the fourth possible implementation manner, the determining, according to the connection state, one primary screen output port and at least one secondary screen output port from the at least two video output ports based on a preset primary and secondary screen selection policy includes:

If all the video output ports are not connected with the corresponding display equipment, monitoring the connection state of all the video output ports, determining the monitored first video output port connected with the corresponding display equipment as a main screen output port, and determining the rest video output ports as auxiliary screen output ports;

if only one video output port is connected with the corresponding display device, determining one video output port connected with the corresponding display device as a main screen output port, and determining the rest video output ports as auxiliary screen output ports;

if N video outlets are connected with corresponding display equipment, determining the video outlet with the highest priority among the N video outlets as a main screen outlet, and determining the rest video outlets as auxiliary screen outlets, wherein N is an integer greater than 1 and less than or equal to the total number of the video outlets.

In a sixth possible implementation provided on the basis of the first possible implementation, or on the basis of the second possible implementation, or on the basis of the third possible implementation, or on the basis of the fourth possible implementation, the step of acquiring the connection state of each video output port of the management device is triggered to be performed when the management device is started; or the step of acquiring the connection state of each video output port of the management device is triggered to be executed when the management device has a video code stream to be output.

In a seventh possible embodiment provided on the basis of the first possible embodiment, or on the basis of the second possible embodiment, or on the basis of the third possible embodiment, or on the basis of the fourth possible embodiment, the connection initialization includes:

acquiring available resolution of display equipment to be initialized, wherein the available resolution is the resolution which can be supported by the display equipment;

configuring the resolution of the display device to be the maximum resolution of the available resolutions;

and distributing memory for the display equipment based on the maximum resolution.

It should be appreciated that in embodiments of the present application, the processor 302 may be a central processing unit (Central Processing Unit, CPU), which may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSPs), application specific integrated circuits (Application Specific Integrated Circuit, ASICs), off-the-shelf programmable gate arrays (Field-Programmable Gate Array, FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

Memory 301 may include read only memory and random access memory and provide instructions and data to processor 302. Some or all of memory 301 may also include non-volatile random access memory. For example, the memory 301 may also store information of a device class.

From the above, when the relation between the main screen and the auxiliary screen needs to be determined, the management device in the video monitoring system can acquire the connection state of each video output port, and then determine one main screen output port and at least one auxiliary screen output port according to the connection state under the guidance of a preset main screen and auxiliary screen selection strategy. It can be understood that the display device connected to the output port of the main screen is the main screen, and the display device connected to the output port of the auxiliary screen is the auxiliary screen. After the connection initialization of the main screen and the auxiliary screen is completed, the main screen and the auxiliary screen can be put into display use, so that the multi-screen display of the management equipment can be realized. According to the scheme, the primary and secondary screen selection strategy is associated with the connection state of the video output port, so that the management equipment can be helped to automatically judge the primary and secondary screen relationship, and the flexible setting of the primary and secondary screen relationship is realized. In addition, aiming at the problem of abnormal screen management process, the application scene of homologous display and the corresponding remedial measures under the application scene of heterologous display are provided, so that the stability of the management equipment is improved.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of external device software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the system embodiments described above are merely illustrative, e.g., the division of modules or units described above is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.

The units described above as separate components may or may not be physically separate, and components shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

The integrated units described above, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present application implements all or part of the flow of the method of the above-described embodiments, or may be implemented by a computer program to instruct associated hardware, where the computer program may be stored in a computer readable storage medium, where the computer program, when executed by a processor, may implement the steps of each of the method embodiments described above. The computer program comprises computer program code, and the computer program code can be in a source code form, an object code form, an executable file or some intermediate form and the like. The above computer readable storage medium may include: any entity or device capable of carrying the computer program code described above, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer readable Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier wave signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the content of the computer readable storage medium described above may be appropriately increased or decreased according to the requirements of the jurisdiction's legislation and the patent practice, for example, in some jurisdictions, the computer readable storage medium does not include electrical carrier signals and telecommunication signals according to the legislation and the patent practice.

The above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.

Claims

1. The display management method is characterized by being applied to management equipment in a video monitoring system, wherein the management equipment comprises at least two video output ports; the display management method comprises the following steps:

determining a main screen output port and at least one auxiliary screen output port in the at least two video output ports according to the connection state based on a preset main screen and auxiliary screen selection strategy;

initializing connection of a main screen and an auxiliary screen to realize multi-screen display of the management device, wherein the main screen is display equipment connected with an output port of the main screen, and the auxiliary screen is display equipment connected with the output port of the auxiliary screen;

The main screen output port and the auxiliary screen output port are determined in the at least two video output ports according to the connection state based on a preset main screen and auxiliary screen selection strategy, and the method comprises the following steps:

if N video output ports are connected with corresponding display equipment, determining the video output port with the highest priority among the N video output ports as a main screen output port, and determining the rest video output ports as auxiliary screen output ports, wherein N is an integer which is more than 1 and less than or equal to the total number of the video output ports.

2. The display management method according to claim 1, wherein if the main screen and the sub-screen are displayed in a homologous manner, after the initializing the connection between the main screen and the sub-screen, the display management method further comprises:

if the screen management process is abnormal, restarting the screen management process, and after restarting the screen management process, returning to execute the step of acquiring the connection state of each video output port of the management equipment and the subsequent steps.

3. The display management method according to claim 1, wherein if the main screen and the sub-screen are heterogeneous displays, after the initializing the connection of the main screen and the sub-screen, the display management method further comprises:

4. The display management method according to claim 1, wherein if the primary screen and the secondary screen are heterogeneous displays, after determining one primary screen output port and at least one secondary screen output port from the at least two video output ports according to the connection state based on the preset primary and secondary screen selection policy, the display management method further comprises:

newly creating a backup file in the memory;

5. The display management method according to any one of claims 1 to 4, wherein the step of acquiring the connection state of each video outlet of the management apparatus is triggered to be performed at the time of startup of the management apparatus; or the step of acquiring the connection state of each video output port of the management device is triggered to be executed when the management device has a video code stream to be output.

6. The display management method according to any one of claims 1 to 4, wherein the connection initialization includes:

Configuring a resolution of the display device to be a maximum resolution of the available resolutions;

7. The display management device is characterized by being applied to management equipment in a video monitoring system, wherein the management equipment comprises at least two video output ports; the display management apparatus includes:

the determining module is used for determining a main screen output port and at least one auxiliary screen output port in the at least two video output ports according to the connection state based on a preset main screen and auxiliary screen selection strategy;

the initialization module is used for initializing connection of a main screen and an auxiliary screen so as to realize multi-screen display of the management equipment, wherein the main screen is display equipment connected with an output port of the main screen, and the auxiliary screen is display equipment connected with an output port of the auxiliary screen;

wherein, the determining module includes:

The second determining unit is used for determining one video output port connected with the corresponding display device as a main screen output port and determining the rest video output ports as auxiliary screen output ports if only one video output port is connected with the corresponding display device;

and the third determining unit is used for determining the video output port with the highest priority among the N video output ports as a main screen output port and determining the rest video output ports as auxiliary screen output ports if N video output ports are connected with corresponding display equipment, wherein N is an integer which is more than 1 and less than or equal to the total number of the video output ports.

8. A management device comprising a memory, a processor and a computer program stored in the memory and running on the processor, characterized in that the processor implements the method according to any of claims 1 to 6 when executing the computer program.

9. A computer readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the method according to any one of claims 1 to 6.