CN102984500A - Method and device and system for achieving compatibility among multiple video monitor equipment - Google Patents
Method and device and system for achieving compatibility among multiple video monitor equipment Download PDFInfo
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Abstract
The invention is applied to the field of video monitors and particularly relates to a method, a device and a system for achieving compatibility among multiple video monitor equipment. When the method, the device and the system for achieving the compatibility among the multiple video monitor equipment are carried out, the method includes that operating orders sent by users are received, the operating orders are sent to sub-processes corresponding to the video monitor equipment through a uniform interface of a host process according to equipment types which are corresponding to the operating orders, the sub-processes are provided with interfaces corresponding with the uniform interface, and when the sub-processes do not normally respond to the operating orders, the sub-processes are reset to continue to send the operating orders to the sub-progresses. The method guaranteed the stability of a video monitor system when a software development kit (SDK) provided by a manufacturer producing the video monitor is abnormal. Due to the fact that each sub-process corresponding to each monitor device is provided with the interface corresponding to the uniform interface, when another monitor device is added, only the SDK is needed to be added with a corresponding sub-process, and therefore strong independency and good expansibility of the video monitor system are guaranteed.
Description
Technical Field
The invention belongs to the field of video monitoring, and particularly relates to a method, a device and a system for realizing compatibility of various video monitoring devices.
Background
The video monitoring system is a comprehensive system with strong precaution capability and is also an important component of a safety precaution system. The video monitoring system is widely applied to many occasions due to intuition, accuracy, timeliness and rich information content. In recent years, with the increasing domestic demand for video monitoring, video equipment manufacturers are increasing, however, as the development time of the security industry is short, a perfect industry standard is not formed yet. Each video device manufacturer makes a corresponding enterprise standard according to the Development of each enterprise, and thus forms a Software Development Kit (SDK) which is different from each other. The SDK is an interface provided by a video device manufacturer to implement communication with a device and an interface to implement encoding and decoding of a video stream of the device. Because the SDKs provided by video equipment manufacturers are different from each other, even the SDKs of series of products developed by the same video equipment manufacturer at different times are very different, and the phenomenon that the SDKs provided by the video equipment manufacturers are "administrative" brings a great challenge to the equipment access of the video monitoring system. For example, users purchase video devices of different brands at different times, and therefore how to use video devices provided by video device manufacturers that have the same video monitoring system and are compatible with different SDKs becomes one of the problems that the industry needs to solve.
To solve the above problem, one method provided by the prior art is to perform secondary packaging on the SDK provided by the video device manufacturer to form a plug-in with a uniform interface. When the client of the video monitoring system interacts with the front-end equipment of the video monitoring system, the host process of the client realizes the compatibility of the video equipment by calling the plug-in.
Since the plug-in is essentially equivalent to the dynamic link library file, the method provided by the above prior art has the following defects: with the increase of the types of the video devices, the loading time is continuously increased, and when a certain SDK has a serious error due to inconsistent stability of SDKs provided by different video device manufacturers, the program of the client of the whole video monitoring system is easily unstable.
Disclosure of Invention
The invention aims to provide a method, a device and a system for realizing compatibility of various video devices, and aims to solve the problem that in the prior art, an SDK provided by a video device manufacturer makes errors to cause instability of a client program of a video monitoring system.
The invention is realized in such a way that a method for realizing compatibility of a plurality of video monitoring devices comprises the following steps:
receiving an operation instruction sent by a user;
according to the equipment type corresponding to the operation instruction, the operation instruction is sent to a subprocess corresponding to the video monitoring equipment through a unified interface of a main process, and the subprocess is provided with an interface corresponding to the unified interface;
and if the sub-process does not normally respond to the operation instruction, restarting the sub-process so as to continuously send the operation instruction to the sub-process.
Another objective of the present invention is to provide a device for realizing compatibility of multiple video monitoring devices, which includes a main process module, wherein the main process module includes a receiving submodule, a sending submodule, and a control submodule;
the receiving submodule is used for receiving an operation instruction sent by a user;
the sending sub-module is used for sending the operation instruction to a sub-process corresponding to the video monitoring equipment through a unified interface of a main process according to the equipment type corresponding to the operation instruction, and the sub-process is provided with an interface corresponding to the unified interface;
and the control sub-module is used for restarting the sub-process so as to continuously send the operation instruction to the sub-process if the sub-process does not normally respond to the operation instruction.
Another objective of the present invention is to provide a system for realizing compatibility of multiple video monitoring devices, where the system includes a video front-end device and a control device, and the control device includes a main process module and a sub-process module;
the video front-end equipment is used for processing video data and returning a processing result to the subprocess module;
the main process module is used for receiving an operation instruction sent by a user, sending the operation instruction to a sub-process corresponding to the video monitoring equipment through a unified interface of the main process according to the equipment type corresponding to the operation instruction, and if the sub-process does not normally respond to the operation instruction, restarting the sub-process so as to continuously send the operation instruction to the sub-process, wherein the sub-process is provided with an interface corresponding to the unified interface;
and the subprocess module is used for receiving an operation instruction sent by the main process module to a subprocess corresponding to the video monitoring equipment, and communicating with the video front-end equipment to acquire a processing result of the video front-end equipment for processing the video data.
As can be seen from the foregoing embodiments of the present invention, on one hand, when the sub-process does not normally respond to the operation instruction sent to the sub-processes through the unified interface of the main process, the sub-process can be restarted so as to continue sending the operation instruction to the sub-process, so that, compared with the prior art that the SDK provided by the video equipment manufacturer is secondarily encapsulated to form a plug-in with a unified interface, the method provided by the embodiments of the present invention does not affect the normal operation of the main process of the client when the SDK provided by the video equipment manufacturer is abnormal, and ensures the stability of the video monitoring system; on the other hand, because the sub-process corresponding to each video device has an interface corresponding to the unified interface of the main process, when a new video device is added, only the corresponding sub-process needs to be added according to the SDK, and the main process does not need to be modified, so that the stronger independence and good expansibility of the video monitoring system are ensured.
Drawings
Fig. 1 is a flowchart illustrating a method for implementing compatibility of multiple video devices according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of an apparatus for implementing compatibility of multiple video devices according to a first embodiment of the present invention;
fig. 3 is a schematic structural diagram of an apparatus for implementing compatibility of multiple video devices according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of an apparatus for implementing compatibility of multiple video devices according to another embodiment of the present invention;
fig. 5 is a schematic structural diagram of an apparatus for implementing compatibility of multiple video devices according to another embodiment of the present invention;
FIG. 6-a is a schematic structural diagram of an apparatus for implementing compatibility of multiple video devices according to another embodiment of the present invention;
fig. 6-b is a schematic structural diagram of an apparatus for implementing compatibility of multiple video devices according to another embodiment of the present invention;
fig. 6-c is a schematic structural diagram of an apparatus for implementing compatibility of multiple video devices according to another embodiment of the present invention;
fig. 6-d is a schematic structural diagram of an apparatus for implementing compatibility of multiple video devices according to another embodiment of the present invention;
fig. 6-e is a schematic structural diagram of an apparatus for implementing compatibility of multiple video devices according to another embodiment of the present invention;
fig. 6-f is a schematic structural diagram of an apparatus for implementing compatibility of multiple video devices according to another embodiment of the present invention;
fig. 6-g is a schematic structural diagram of an apparatus for implementing compatibility of multiple video devices according to another embodiment of the present invention;
fig. 6-h is a schematic structural diagram of an apparatus for implementing compatibility of multiple video devices according to another embodiment of the present invention;
fig. 7-a is a schematic diagram of a system architecture for implementing compatibility of multiple video devices according to a first embodiment of the present invention;
fig. 7-b is a schematic diagram of a system architecture for implementing compatibility of multiple video devices according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 shows a flowchart of a method for implementing compatibility of multiple video devices according to a first embodiment of the present invention, which includes step S101, step S102, and step S103, and is detailed as follows:
step S101, receiving an operation instruction sent by a user.
In the embodiment of the invention, the main process provides a man-machine interface, receives an operation instruction sent by a user through the interface, and the operation instruction realizes certain operation on the video equipment. For example, if a user needs to set parameters for a certain video device, the host process receives a parameter setting instruction sent by the user; if the user wants to receive the alarm information of a certain video device, the main process receives a monitoring device instruction sent by the user.
And step S102, according to the equipment type corresponding to the operation instruction, sending the operation instruction to a subprocess corresponding to the video equipment through a unified interface of a main process, wherein the subprocess is provided with an interface corresponding to the unified interface.
Unlike the prior art that performs secondary encapsulation on an SDK provided by a video device manufacturer, in the embodiment of the present invention, the host process has a unified interface. And developing corresponding subprocesses aiming at the SDK provided by each video equipment manufacturer, wherein the subprocesses are provided with interfaces corresponding to the unified interface of the main process, so that when the main process communicates with a plurality of subprocesses at the same time, the main process calls the subprocesses through the interfaces. Because one video device is correspondingly managed by one subprocess and the main process has one unified interface, according to the method provided by the embodiment of the invention, when the video device is newly added, only the corresponding subprocess is required to be added according to the SDK without modifying the main process, so that the independence and the expansibility of the video monitoring system are ensured.
In order to avoid sending invalid operation instructions, in the embodiment of the present invention, before sending an operation instruction to a sub-process corresponding to a video device through a unified interface of a host process, it may be further determined whether the sub-process is started, before that, it is also determined whether the sub-process is registered with the host process, and if not, the sub-process is started. And if the subprocess is started, directly sending an operation instruction to the subprocess, and if the subprocess is not started, sending the operation instruction to the subprocess after the subprocess is started. After the sub-process is started, the main process is registered and sent with the heartbeat information. Therefore, in the embodiment of the present invention, if the main process does not receive the normal heartbeat information for a period of time, it is determined that the sub-process is still not started or dead, and thus the operation of restarting the sub-process should be performed.
Step S103, if the sub-process does not normally respond to the operation instruction, the sub-process is restarted so as to continue to send the operation instruction to the sub-process.
Because the SDK provided by the video device manufacturer is poor in compatibility and prone to errors, frequent calls to the sub-process in a short time, a large number of concurrent operations, and long-time running of the video device, the sub-process may not be able to normally respond to the sent operation instruction. In the embodiment of the present invention, after sending the operation instruction to the sub-process corresponding to the video device through the unified interface of the main process, it can be further determined whether the sub-process normally responds to the operation instruction, and the specific method is as follows: if the sub-process returns normal feedback information, such as ACKnowledge (ACK) information or the like, to the operation instruction, it is determined that the sub-process normally responds to the operation instruction, and if the sub-process returns Non-ACKnowledge (NACK) information or does not return any information, it is determined that the sub-process does not normally respond to the operation instruction, and the sub-process is in an abnormal state.
And if the sub-process does not normally respond to the sending instruction, restarting the sub-process so as to continuously send the operation instruction to the sub-process. Different from the prior art that the SDK is packaged for the second time to form a plug-in with a uniform interface, in the embodiment of the invention, the sub-process developed according to the SDK is an executable program, so even if the sub-process cannot normally respond to a sending instruction, a prompt for restarting the sub-process can be given, and the instability and even the crash of the whole system to the main process operated by the client side cannot be caused.
Because the video monitoring system is different from common application software but is a system with higher real-time requirement, a user requires to be able to view a real-time image or receive alarm information and the like as soon as possible, so that if the sub-process is restarted for many times (the times can be set according to the needs of the user), the sub-process still cannot normally respond to an operation instruction, and then the computer or the computer system running the main process and the sub-process is restarted.
It should be noted that, after the main process is started, the sub-process to be communicated with the main process may be managed, including managing the life cycle of the sub-process, such as when the sub-process should be started, and periodically detecting the state of the sub-process, so as to shut down the sub-process when the program is finished, and so on.
As can be seen from the above method for achieving compatibility of various video devices, on one hand, when the subprocess does not normally respond to the operation instruction sent to the subprocesses through the unified interface of the main process, the subprocess can be restarted so as to continue to send the operation instruction to the subprocess, therefore, compared with the prior art that the SDK provided by the video device manufacturer is secondarily encapsulated to form a plug-in with a unified interface, the method provided by the embodiment of the present invention does not affect the normal operation of the main process of the client when the SDK provided by the video device manufacturer is abnormal, and ensures the stability of the video monitoring system; on the other hand, because the sub-process corresponding to each video device has an interface corresponding to the unified interface of the main process, when a new video device is added, only the corresponding sub-process needs to be added according to the SDK, and the main process does not need to be modified, so that the stronger independence and good expansibility of the video monitoring system are ensured.
In order to clearly illustrate the method for achieving compatibility of various video monitoring devices provided by the embodiment of the present invention, two specific embodiments are given below.
The first embodiment is as follows:
s1, the user sends a parameter setting instruction through the interface provided by the client host process to set the parameter of a certain video device, and the host process receives the parameter setting instruction;
s2, the main process detects whether the sub process corresponding to the video device is started, if not, the sub process is started;
s3, if the corresponding sub-process is started, the main process sends a parameter setting instruction to the sub-process;
after S3, the sub-process may not respond normally to the parameter setting instruction, and possible reasons include: SDKs provided by video equipment manufacturers are poorly compatible, error prone, frequent calls to sub-processes in a short time, numerous concurrent operations, long-term operation of video equipment, and so on.
S4, if the sub-process can not respond to the parameter setting instruction normally, the main process restarts the sub-process and sends the parameter setting instruction again;
and S5, if the sub-process receives the parameter setting instruction and then correctly sets the parameters and returns to normal, the operation is finished.
Example two:
s' 1, a user sends a monitoring device instruction through an interface provided by a client main process to receive alarm information of a certain video device, and the main process receives the monitoring device instruction;
s' 2, the main process detects whether the sub-process corresponding to the video equipment is started, and if not, the sub-process is started;
s' 3, if the corresponding sub-process is started, the main process sends a monitoring device instruction to the sub-process;
s' 4, after receiving the instruction of the monitoring equipment, the sub-process automatically monitors the information reported by the equipment, judges whether alarm information is reported or not, and sends normal information to the main process;
s' 5, if the reported information cannot be normally received within a period of time, the subprocess sends abnormal information to the main process;
s' 6, the main process receives the abnormal information and restarts the subprocess;
s' 7, the main process restarts the computer if the main process receives abnormal information after restarting the sub-process continuously for a plurality of times (the times can be set according to actual conditions).
The computer is a computer system for running a main process and a sub-process, and due to the particularity of the video monitoring system, the video monitoring system is not common application software, the requirement on real-time performance is high, if only an error report is sent, alarm information cannot be received finally, and great loss is possibly brought to a user, so that the system is preferably recovered to run as soon as possible by adopting a computer restarting mode.
Fig. 2 is a schematic structural diagram of an apparatus for implementing compatibility of multiple video devices according to a first embodiment of the present invention. For convenience of explanation, only portions related to the embodiments of the present invention are shown. The apparatus for implementing compatibility of various video devices illustrated in fig. 2 comprises a main process module 21, and the main process module 21 comprises a receiving submodule 211, a sending submodule 212 and a control submodule 213, wherein:
the receiving submodule 211 is configured to receive an operation instruction sent by a user;
a sending sub-module 212, configured to send the operation instruction to a sub-process corresponding to the video device through a unified interface of the main process according to the device type corresponding to the operation instruction, where the sub-process has an interface corresponding to the unified interface;
and the control sub-module 213 is configured to, if the sub-process does not normally respond to the operation instruction, restart the sub-process so as to continue sending the operation instruction to the sub-process.
It should be noted that, in the above embodiments of the apparatus for implementing compatibility of multiple video devices, the division of each functional module is only an example, and in practical applications, the above functions may be distributed by different functional modules according to needs, for example, configuration requirements of corresponding hardware or convenience of implementation of software, that is, the internal structure of the apparatus for implementing compatibility of multiple video devices is divided into different functional modules to complete all or part of the above described functions. In practical applications, the corresponding functional modules in this embodiment may be implemented by corresponding hardware, or may be implemented by corresponding hardware executing corresponding software, for example, the receiving sub-module may be hardware that executes the operation instruction sent by the receiving user, such as a receiver, or a general processor or other hardware device that can execute a corresponding computer program to complete the foregoing functions; the sending sub-module may be hardware, such as a sender, having a function of sending the operation instruction to the sub-process corresponding to the video device through the unified interface of the main process according to the device type corresponding to the operation instruction, or may be a general processor or other hardware device capable of executing a corresponding computer program to complete the foregoing function (the foregoing description principles may be applied to various embodiments provided in this specification).
The main process module 21 illustrated in fig. 2 further includes a first determining sub-module 301, as shown in fig. 3, which is an apparatus for implementing compatibility of multiple video devices according to another embodiment of the present invention. The first judging submodule 301 is configured to judge whether the subprocess normally responds to the operation instruction.
The first judging submodule 301 illustrated in fig. 3 includes a first judging unit 401, as shown in fig. 4, and is an apparatus for implementing compatibility of multiple video devices according to another embodiment of the present invention. The first determining unit 401 is configured to determine that the sub-process normally responds to the operation instruction if the sub-process returns normal feedback information, for example, ACK information, to the operation instruction.
The main process module 21 illustrated in fig. 2 may also further include a second judgment sub-module 501 and a sub-module 502, as shown in fig. 5, an apparatus for implementing compatibility of multiple video devices according to another embodiment of the present invention is provided, wherein:
a second judgment sub-module 501, configured to judge whether a sub-process is started;
and a starting module 502 for starting the sub-process if the sub-process is not started.
The main process module 21 shown in any of fig. 2 to fig. 5 may further include a management sub-module 601, as shown in fig. 6-a to fig. 6-d, according to another embodiment of the present invention, an apparatus for implementing compatibility between multiple video devices is provided. The management sub-module 601 is used for managing the sub-process after the main process is started, including managing the life cycle of the sub-process, such as when the sub-process should be started, and periodically detecting the state of the sub-process, so as to shut down the sub-process when the program runs out, and so on.
The apparatus illustrated in any of fig. 2 to fig. 5 may also further include a sub-process module 602, as shown in fig. 6-e to fig. 6-h, in another embodiment of the present invention, the sub-process module 602 is configured to receive an operation instruction sent by the sending sub-module to a sub-process corresponding to the video device, and send data acquired from the front-end video device to the main process module 21, and so on.
Fig. 7-a is a schematic structural diagram of a system for implementing compatibility of multiple video devices according to a first embodiment of the present invention. For convenience of explanation, only portions related to the embodiments of the present invention are shown. The system for implementing multiple video device compatibility illustrated in fig. 7-a comprises a video front end 71 and a control device 72, the control device 72 comprising a main process module 721 and a sub-process module 722, wherein:
the video front-end device 71 is configured to process the video data and return a processing result to the subprocess module;
a main process module 721, configured to receive an operation instruction sent by a user, send the operation instruction to a sub-process corresponding to the video device through a unified interface of the main process according to a device type corresponding to the operation instruction, and if the sub-process does not normally respond to the operation instruction, restart the sub-process so as to continue sending the operation instruction to the sub-process, where the sub-process has an interface corresponding to the unified interface;
the sub-process module 722 is configured to receive an operation instruction sent by the main process module 721 to a sub-process corresponding to the video device, communicate with the video front-end device 71 to obtain a processing result of the video front-end device 71 processing the video data, and feed the processing result back to the main process module 721.
Fig. 7-b shows a connection diagram of the system for implementing compatibility of various video devices illustrated in fig. 7-a, the control device 72 and various video front-end devices 71 are connected through a network, and the main process module 721 interacts with the sub-process module 722 through a unified interface.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable storage medium, and the storage medium may include: read Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disk, and the like
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A method for enabling compatibility with multiple video devices, the method comprising:
receiving an operation instruction sent by a user;
according to the equipment type corresponding to the operation instruction, the operation instruction is sent to a subprocess corresponding to the video equipment through a unified interface of a main process, and the subprocess is provided with an interface corresponding to the unified interface;
and if the sub-process does not normally respond to the operation instruction, restarting the sub-process so as to continuously send the operation instruction to the sub-process.
2. The method of claim 1, wherein after sending the operation instruction to the sub-process corresponding to the video device through the unified interface of the host process, the method further comprises:
and judging whether the subprocess normally responds to the operation instruction.
3. The method of claim 2, wherein said determining whether the sub-process responds normally to the operation instruction is: and if the subprocess returns normal feedback information to the operation instruction, judging that the subprocess normally responds to the operation instruction.
4. The method of claim 1, wherein sending the operation instruction to a sub-process corresponding to the video device through a unified interface of the host process further comprises:
judging whether the subprocess is started or not;
and if the sub-process is not started, starting the sub-process.
5. The method of any of claims 1 to 4, further comprising:
and after the main process is started, managing the sub-process.
6. A device for realizing compatibility of various video devices is characterized by comprising a main process module, wherein the main process module comprises a receiving submodule, a sending submodule and a control submodule;
the receiving submodule is used for receiving an operation instruction sent by a user;
the sending sub-module is used for sending the operation instruction to a sub-process corresponding to the video equipment through a unified interface of a main process according to the equipment type corresponding to the operation instruction, and the sub-process is provided with an interface corresponding to the unified interface;
and the control sub-module is used for restarting the sub-process so as to continuously send the operation instruction to the sub-process if the sub-process does not normally respond to the operation instruction.
7. The apparatus of claim 6, wherein the host process module further comprises:
the first judgment sub-module is used for judging whether the sub-process normally responds to the operation instruction; or,
the main process module further comprises:
the second judgment submodule is used for judging whether the subprocess is started or not;
and the starting sub-module is used for starting the sub-process if the sub-process is not started.
8. The apparatus of claim 7, wherein the first determination submodule comprises:
and the first judgment unit is used for judging that the subprocess normally responds to the operation instruction if the subprocess returns normal feedback information to the operation instruction.
9. The apparatus according to any one of claims 6 to 8, wherein the apparatus further comprises a sub-process module, configured to receive an operation instruction sent by the sending sub-module to a sub-process corresponding to a video device; the main process module also comprises a management submodule used for managing the subprocess after the main process is started.
10. A system for realizing compatibility of multiple video devices is characterized by comprising a video front-end device and a control device, wherein the control device comprises a main process module and a subprocess module;
the video front-end equipment is used for processing video data and returning a processing result to the subprocess module;
the main process module is used for receiving an operation instruction sent by a user, sending the operation instruction to a sub-process corresponding to the video equipment through a unified interface of the main process according to the equipment type corresponding to the operation instruction, and if the sub-process does not normally respond to the operation instruction, restarting the sub-process so as to continuously send the operation instruction to the sub-process, wherein the sub-process is provided with an interface corresponding to the unified interface;
and the subprocess module is used for receiving an operation instruction sent by the main process module to a subprocess corresponding to the video equipment, and communicating with the video front-end equipment to acquire a processing result of the video front-end equipment for processing the video data.
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