CN111405237A - Cloud storage system providing preview function and preview method - Google Patents
Cloud storage system providing preview function and preview method Download PDFInfo
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- CN111405237A CN111405237A CN201911267302.4A CN201911267302A CN111405237A CN 111405237 A CN111405237 A CN 111405237A CN 201911267302 A CN201911267302 A CN 201911267302A CN 111405237 A CN111405237 A CN 111405237A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
- H04N21/4312—Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4335—Housekeeping operations, e.g. prioritizing content for deletion because of storage space restrictions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
- H04N21/47202—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for requesting content on demand, e.g. video on demand
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/854—Content authoring
- H04N21/8547—Content authoring involving timestamps for synchronizing content
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/854—Content authoring
- H04N21/8549—Creating video summaries, e.g. movie trailer
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Abstract
The embodiment of the application provides a cloud storage system and a preview method for providing a preview function, wherein the method comprises the following steps: after a preview request of a target client is obtained, according to an identifier of monitoring equipment to be previewed in the preview request, obtaining a timestamp of the monitoring equipment to be previewed and a target storage address of a cover picture closest to the current moment, wherein the cover picture of the monitoring equipment to be previewed is generated on the basis of an I frame in video stream data of the monitoring equipment to be previewed received in real time; and sending the target storage address to a target client so that the target client can acquire and preview the cover picture of the monitoring equipment to be previewed according to the target storage address. The cover picture of the monitoring device is generated according to the I frame of the monitoring device, the cover picture of the monitoring device is sent to the client side, so that the client side can display the cover picture of the monitoring device, a user can visually determine the corresponding relation between the monitoring device and a monitoring scene according to the cover picture, and the situation that the user visually knows the monitoring area is facilitated.
Description
Technical Field
The application relates to the technical field of video storage, in particular to a cloud storage system and a preview method for providing a preview function.
Background
With the development of internet technology and the improvement of safety awareness of people, monitoring equipment is gradually popularized, more and more front-end monitoring equipment are accessed to a video cloud storage system, and more front-end points are displayed on an interface by a video application platform. In the related video cloud storage technology, a video application platform generally distinguishes monitoring equipment through point names, the names of the monitoring equipment are displayed on a display interface, and a user selects video data of the designated monitoring equipment to display according to the names of the monitoring equipment.
However, by adopting the above method, the names of the monitoring devices are displayed on the display interface, and the user needs to memorize the corresponding relationship between the monitoring devices and the monitoring scene, so that an error is easily caused when the number of front-end points is large, which is not favorable for the user to intuitively obtain the corresponding relationship between the monitoring devices and the monitoring scene, and is not favorable for the user to intuitively know the condition of the monitoring area.
Disclosure of Invention
The embodiment of the application aims to provide a cloud storage system and a preview method for providing a preview function, so that a user can know the condition of a monitoring area intuitively. The specific technical scheme is as follows:
in a first aspect, an embodiment of the present application provides a cloud storage system providing a preview function, where the system includes:
a management node and a plurality of storage nodes;
the storage node is used for receiving video stream data acquired by appointed monitoring equipment in real time; extracting an I frame from the video stream data to generate a cover picture of the appointed monitoring equipment; storing the video stream data and the cover pictures of the appointed monitoring equipment;
the management node is used for acquiring a storage address of a cover picture corresponding to the monitoring equipment to be previewed as a target storage address according to the identification of the monitoring equipment to be previewed in the preview request after receiving the preview request of a target client, wherein the cover picture is the cover picture with the timestamp closest to the current moment, and the target storage address comprises the address of the storage node for storing the cover picture of the monitoring equipment to be previewed;
and sending the target storage address to the target client so that the target client can acquire and preview the cover picture of the monitoring equipment to be previewed according to the target storage address.
In a possible implementation, the storage node is specifically configured to: and storing the cover pictures of the specified monitoring equipment in a system disk of the storage node.
In a possible implementation manner, the storage node is further configured to send a storage address of a cover picture of the specified monitoring device and an identifier of the specified monitoring device to the management node;
the management node is further configured to receive a storage address of a cover picture of the specified monitoring device and an identifier of the specified monitoring device; and associating and storing the storage address of the cover picture of the specified monitoring equipment and the identification of the specified monitoring equipment.
In a possible implementation manner, the storage node is specifically configured to:
judging whether the storage node stores the historical cover picture of the target monitoring equipment or not;
if so, deleting the historical cover picture of the target monitoring equipment, and storing the currently generated cover picture of the target monitoring equipment;
and if not, storing the currently generated cover page picture of the target monitoring equipment.
In a possible implementation, the management node is further configured to: when a display request of the target client for the video stream data of the monitoring equipment to be previewed is received, acquiring a stream taking address of the video stream data of the monitoring equipment to be previewed; and returning the stream taking address to the target client, so that the target client acquires the video stream data of the monitoring equipment to be previewed according to the stream taking address and displays the video stream data of the target monitoring equipment.
In a second aspect, an embodiment of the present application provides a preview method, where the method includes:
after a preview request of a target client is obtained, according to an identifier of monitoring equipment to be previewed in the preview request, obtaining a target storage address of a cover picture corresponding to the monitoring equipment to be previewed, wherein the cover picture is the cover picture with a timestamp closest to the current moment, the target storage address comprises an address of a storage node for storing the cover picture of the monitoring equipment to be previewed, and the cover picture of the monitoring equipment to be previewed is generated on the basis of an I frame in video stream data of the monitoring equipment to be previewed, which is received in real time;
and sending the target storage address to the target client so that the target client can acquire and preview the cover picture of the monitoring equipment to be previewed according to the target storage address.
In one possible embodiment, the method further comprises:
receiving video stream data acquired by the monitoring equipment to be previewed in real time;
extracting an I frame with a timestamp closest to the current time from the video data;
generating the latest cover picture of the monitoring equipment to be previewed based on the extracted I frame;
and storing the cover pictures of the monitoring equipment to be previewed in a storage node.
In a possible implementation manner, the storing, in a storage node, a cover picture of the monitoring device to be previewed includes:
and storing the cover pictures of the monitoring equipment to be previewed in a system disk of a storage node.
In a possible implementation, the extracting, from the video data, an I frame whose timestamp is closest to the current time includes:
according to a preset sampling period, when a specified sampling moment is reached, extracting a first frame I frame in video stream data of the monitoring equipment to be previewed from the specified sampling moment.
In a possible implementation manner, the storing, in a storage node, a cover picture of the monitoring device to be previewed includes:
judging whether a storage node stores a history cover picture of the monitoring equipment to be previewed;
if so, deleting the historical cover pictures of the monitoring equipment to be previewed, and storing the currently generated cover pictures of the monitoring equipment to be previewed;
and if not, storing the currently generated cover picture of the monitoring equipment to be previewed.
In a third aspect, an embodiment of the present application provides a preview apparatus, where the apparatus includes:
the storage address acquisition module is used for acquiring a preview request of a target client, and then acquiring a target storage address of a cover picture closest to a timestamp of the monitoring equipment to be previewed and the current time according to an identifier of the monitoring equipment to be previewed in the preview request, wherein the target storage address comprises an address of a storage node for storing the cover picture of the monitoring equipment to be previewed, and the cover picture of the monitoring equipment to be previewed is generated on the basis of an I frame in video stream data of the monitoring equipment to be previewed, which is received in real time;
and the storage address sending module is used for sending the target storage address to the target client so that the target client can obtain and preview the cover picture of the monitoring equipment to be previewed according to the target storage address.
In a possible embodiment, the apparatus further comprises:
the video stream data receiving module is used for receiving the video stream data acquired by the monitoring equipment to be previewed in real time;
an I frame extraction module, configured to extract an I frame with a timestamp closest to a current time from the video data;
the cover picture generating module is used for generating the latest cover picture of the monitoring equipment to be previewed based on the extracted I frame;
and the cover picture storage module is used for storing the cover picture of the monitoring equipment to be previewed in a storage node.
In a possible implementation manner, the cover picture storage module is specifically configured to: and storing the cover pictures of the monitoring equipment to be previewed in a system disk of a storage node.
In a possible implementation manner, the I-frame extraction module is specifically configured to: according to a preset sampling period, when a specified sampling moment is reached, extracting a first frame I frame in video stream data of the monitoring equipment to be previewed from the specified sampling moment.
In a possible implementation manner, the cover picture storage module is specifically configured to: judging whether a storage node stores a history cover picture of the monitoring equipment to be previewed; if so, deleting the historical cover pictures of the monitoring equipment to be previewed, and storing the currently generated cover pictures of the monitoring equipment to be previewed; and if not, storing the currently generated cover picture of the monitoring equipment to be previewed.
In a fourth aspect, an embodiment of the present application provides an electronic device, including a processor and a memory;
the memory is used for storing a computer program;
the processor is configured to implement the preview method according to any one of the second aspects when executing the program stored in the memory.
In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and the computer program, when executed by a processor, implements the preview method according to any one of the second aspects.
According to the cloud storage system and the preview method for providing the preview function, the cover picture of the monitoring device is generated according to the I frame of the monitoring device, the cover picture of the monitoring device to be previewed is sent to the client side so that the client side can display the cover picture of the monitoring device to be previewed, a user can visually determine the corresponding relation between the monitoring device and a monitoring scene according to the cover picture, and the user can visually know the condition of a monitoring area. Of course, not all advantages described above need to be achieved at the same time in the practice of any one product or method of the present application.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a first schematic diagram of a cloud storage system providing a preview function according to an embodiment of the present application;
fig. 2 is a second schematic diagram of a cloud storage system providing a preview function according to an embodiment of the present application;
FIG. 3 is a diagram illustrating a method for generating a cover image according to an embodiment of the present disclosure;
FIG. 4 is a first schematic diagram of a preview method according to an embodiment of the present application;
FIG. 5 is a second schematic diagram of a preview method according to an embodiment of the present application;
FIG. 6 is a diagram illustrating a cover image storage method according to an embodiment of the present disclosure;
fig. 7 is a schematic diagram illustrating interaction between a client and a cloud storage system according to an embodiment of the present application;
FIG. 8 is a first schematic diagram of a preview device according to an embodiment of the present application;
FIG. 9 is a second schematic diagram of a preview device according to an embodiment of the present application;
fig. 10 is a schematic diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
First, terms of art in the embodiments of the present application are explained:
video cloud storage: the storage system is used for accessing video data of various video front-end devices based on a distributed storage architecture.
I frame: key frames in a video stream.
Cover pictures: for a certain front-end monitoring device, the collected video is a picture at a certain moment.
Frame analysis: the video code stream generated by the front-end equipment is analyzed to obtain the relevant frame information such as I frame, P frame and the like in the code stream, and the source data of the code stream cannot be changed in the frame analysis process.
In the related art, the video application platform generally distinguishes the monitoring devices by the point name, displays the names of the monitoring devices on the display interface, and a user selects the video data of the designated monitoring device to display according to the names of the monitoring devices. However, by adopting the method, the names of the monitoring devices are displayed on the display interface, which is not beneficial for the user to intuitively acquire the corresponding relation between the monitoring devices and the monitoring scene and is not beneficial for the user to intuitively know the condition of the monitoring area.
In view of this, an embodiment of the present application provides a cloud storage system providing a preview function, and referring to fig. 1, the system includes:
a management node 11 and a plurality of storage nodes 12;
the storage node 12 is used for receiving video stream data acquired by appointed monitoring equipment in real time; extracting an I frame from video stream data to generate a cover picture of a specified monitoring device; and storing video stream data and cover pictures of the appointed monitoring equipment.
The management node 11 is configured to, after receiving a preview request of a target client, obtain, according to an identifier of a monitoring device to be previewed in the preview request, a storage address of a cover picture, which is closest to a timestamp of the monitoring device to be previewed at a current time, as a target storage address, where the target storage address includes an address of a storage node storing the cover picture of the monitoring device to be previewed; and sending the target storage address to a target client so that the target client can acquire and preview the cover picture of the monitoring equipment to be previewed according to the target storage address.
In the cloud storage system, the storage node 12 is configured to store video stream data of a specific monitoring device. The storage node 12 receives video stream data acquired by the specified monitoring equipment in real time, extracts I frames from the video stream data, and generates cover pictures of the specified monitoring equipment according to the extracted I frames. The storage node 12 stores video stream data and cover pictures. The storage node 12 extracts the I-frame to generate the cover page picture, because the performance consumed by decoding the I-frame into an image is the lowest, the computing resource of the storage node 12 can be saved.
In order to ensure the instantaneity of the generation of the cover picture, a cover picture can be generated immediately after the monitoring equipment is accessed to the storage node, namely, after the storage node acquires the code stream of the monitoring equipment, an I frame is immediately analyzed from the code stream, a related algorithm is called to convert the I frame data into a picture format, then the cover picture of the monitoring equipment can be generated according to a preset sampling period (such as half an hour and the like), the previously generated cover picture of the monitoring equipment is deleted, and the newly generated cover picture of the monitoring equipment is stored. So that for each monitoring device, only one cover picture of the monitoring device can be saved.
When a user wants to preview a cover picture, a preview request is sent to the management node 11 by using the target client, the preview request includes an identifier (a plurality of identifiers) of the monitoring device to be previewed, and the management node 11 acquires a storage address of the cover picture, which is closest to a timestamp of the monitoring device to be previewed and the current time, as a target storage address according to the identifier of the monitoring device to be previewed. The time stamp of the cover picture may be a time stamp of an I frame for generating the cover picture, or may be a generation time of the cover picture. The target storage address includes an address of a storage node storing the corresponding cover picture, and may further include a storage path of the corresponding cover picture in the storage node, and the like. And the target client downloads and displays the corresponding cover pictures according to the target storage address.
The management node 11 may also send a preview request of the target client for the cover picture of the monitoring device to be previewed to the target client after receiving the preview request of the target client for the cover picture of the monitoring device to be previewed; in a possible implementation manner, in order to ensure information security, the management node 11 may further verify whether the target client has a usage right for the monitoring device to be previewed, and send a cover picture of the monitoring device to be previewed to the target client when the target client has the usage right for the monitoring device to be previewed; and when the target client does not have the use right for the monitoring equipment to be previewed, returning an error prompt to the client.
In the embodiment of the application, when the video stream data of the monitoring device is stored according to the storage node, a cover page picture of the monitoring device generated through an I frame is also stored. And sending a cover picture of the monitoring equipment to be previewed to the client so that the client displays the cover picture of the monitoring equipment to be previewed, and the user can visually determine the corresponding relation between the monitoring equipment and the monitoring scene according to the cover picture, thereby being beneficial to visually knowing the condition of the monitoring area. And the front cover picture with the timestamp closest to the current time is displayed by the client, so that the real-time performance of the front cover picture can be improved.
The cover pictures may be stored in a system disk of the storage node. In a possible implementation manner, the storage node 12 is specifically configured to: and storing the cover pictures of the appointed monitoring equipment in a system disk of the storage node.
The cloud storage system may be a distributed storage system, and in a possible implementation manner, the architecture of the cloud storage system may specifically be as shown in fig. 2, where the management node is configured to be responsible for load balancing of each storage node and manage each storage node, and the storage node is configured to generate each cover picture and store video stream data and the cover picture. The storage nodes comprise system disks and data disks. The cover pictures are mainly used for being provided for the platform client side to be extracted and displayed, and when the platform client side needs to extract the cover pictures to be displayed is uncertain, the cover pictures also need to be stored so as to provide cover picture display service for different platform client sides at any time.
Because the extraction of the cover pictures has instantaneity, a large number of display of the cover pictures of the monitoring equipment need to be rapidly carried out. The inventor finds in research that if the cover picture is stored in the data disc together with the video stream data, the frequent reading and writing of the cover picture can affect the video stream data storage performance. In addition, as the video stream data storage in the data disk is generally used in a manner of virtualization into a resource pool, a special partition space is also needed to store the front cover picture, and the implementation process is complicated. Therefore, the cover pictures can be stored in the system disk of the storage node, the implementation process is simple, and the influence on video stream data storage is reduced.
In a possible implementation manner, the storage node 12 is specifically configured to: judging whether a history cover picture of the target monitoring equipment is stored in the storage node; if so, deleting the historical cover picture of the target monitoring equipment, and storing the currently generated cover picture of the target monitoring equipment; and if not, storing the currently generated cover page picture of the target monitoring equipment.
The above-mentioned historical front cover picture of deleting target monitoring equipment to the front cover picture of storing the target monitoring equipment who generates at present, can the equivalent replace and become: and covering the historical cover picture of the target monitoring device by the currently generated cover picture of the target monitoring device.
In order to save storage space, only one up-to-date cover picture may be saved for each monitoring device. Considering that the number of monitoring devices in charge of each storage node is limited, generally below 500 routes, each monitoring device only needs to store one cover picture, the size of the cover picture is calculated according to 2MB (megabyte), the total required storage space is about 1GB (gigabyte), and after all the cover pictures of the accessed monitoring devices are generated, the size of the storage space occupied by the cover pictures will not increase continuously. Therefore, for each storage node, the cover picture of the monitoring device accessed by the storage node may be stored in the system disk of the storage node, for example, a directory may be newly created in the system disk of the storage node for storing the cover picture.
In a possible embodiment, the storage node 12 is further configured to send the storage address of the cover picture of the specified monitoring device and the identifier of the specified monitoring device to the management node.
The management node 11 is further configured to receive a storage address of a cover picture of the specified monitoring device and an identifier of the specified monitoring device; and associating and storing the storage address of the cover picture of the appointed monitoring equipment and the identification of the appointed monitoring equipment.
For example, as shown in fig. 3, a designated storage node obtains a cover page picture of a target monitoring device; writing the cover picture into a system disc of a designated storage node; the appointed storage node reports the identification of the target monitoring equipment and the storage path of the cover picture of the target monitoring equipment to the management node; the management node stores the identifier of the target monitoring device and the storage path of the cover picture of the target monitoring device in an associated manner, for example, the management node may store the identifier of the target monitoring device and the storage path of the cover picture of the target monitoring device in a database of the management node.
The manner of associative storage herein includes, but is not limited to, tags, tables, pointers, and the like. The purpose of the associated storage is to facilitate the subsequent quick acquisition of the cover pictures of the monitoring equipment according to the identification of the monitoring equipment. In the embodiment of the present application, the management node 11 associates and stores the storage address of the cover picture of the specified monitoring device and the identifier of the specified monitoring device, so that the management node 11 can conveniently and directly inquire in the following process.
In a possible implementation, the management node 11 is further configured to: when a display request of a target client for video stream data of monitoring equipment to be previewed is received, acquiring a stream taking address of the video stream data of the monitoring equipment to be previewed; and returning the stream-taking address to the target client so that the target client acquires the video stream data of the monitoring equipment to be previewed according to the stream-taking address and displays the video stream data of the target monitoring equipment.
The user can select video stream data to be displayed according to the cover picture, and the management node 11 acquires a stream taking address of the video stream data of the monitoring equipment to be previewed when receiving a display request of a target client for the video stream data of the monitoring equipment to be previewed; and returning the stream-taking address to the target client so that the target client can acquire and display the video stream data of the target monitoring equipment according to the stream-taking address.
An embodiment of the present application provides a preview method, referring to fig. 4, where the method includes:
s401, after a preview request of a target client is obtained, according to an identifier of monitoring equipment to be previewed in the preview request, a target storage address of a cover picture closest to a timestamp of the monitoring equipment to be previewed and the current moment is obtained, wherein the target storage address comprises an address of a storage node for storing the cover picture of the monitoring equipment to be previewed, and the cover picture of the monitoring equipment to be previewed is generated based on an I frame in video stream data of the monitoring equipment to be previewed received in real time.
The preview method is applied to the cloud storage system, so that the preview method can be executed through the cloud storage system, and specifically can be executed through a management node and a storage node in the cloud storage system.
The monitoring equipment to be previewed can be any one monitoring equipment, and the cloud storage system is responsible for storing video stream data acquired by each monitoring equipment. In the embodiment of the present application, a monitoring device (i.e., a monitoring device to be previewed) is taken as an example for explanation, and it can be understood by those skilled in the art that the previewing method of the embodiment of the present application can be executed for each monitoring device connected to a cloud storage system.
S402, sending the target storage address to the target client, so that the target client can obtain and preview the cover picture of the monitoring equipment to be previewed according to the target storage address.
After receiving a preview request of a target client for a cover picture of a monitoring device to be previewed, sending the cover picture of the target monitoring device to the target client
In the embodiment of the application, the cover picture of the monitoring device to be previewed is sent to the client so that the client can display the cover picture of the monitoring device to be previewed, and a user can visually determine the corresponding relation between the monitoring device and a monitoring scene according to the cover picture, so that the user can visually know the condition of a monitoring area. And the front cover picture with the timestamp closest to the current time is displayed by the client, so that the real-time performance of the front cover picture can be improved.
In a possible embodiment, referring to fig. 5, the method further comprises:
s501, receiving video stream data acquired by monitoring equipment to be previewed in real time.
S502, an I frame whose timestamp is closest to the current time is extracted from the video data.
The I-frame in the video stream data may be identified by a frame analysis technique and the I-frame with the timestamp closest to the current time instant is extracted. In a possible implementation, the extracting, in the video data, the I frame whose timestamp is closest to the current time includes: according to a preset sampling period, when the specified sampling time is reached, extracting a first frame I frame in video stream data of the monitoring equipment to be previewed from the specified sampling time.
In order to ensure the instantaneity of cover picture generation, a cover picture can be generated immediately after a target monitoring device is accessed to a cloud storage system, namely, after a storage node of the cloud storage system acquires a code stream of the target monitoring device, an I frame is immediately analyzed from the code stream, a related algorithm is called to convert I frame data into a picture format, then the cover picture of the target monitoring device can be generated according to a preset sampling period (such as half an hour and the like), the previously generated cover picture of the target monitoring device is deleted, and the newly generated cover picture of the target monitoring device is stored. Therefore, for each monitoring device, only one cover picture of the monitoring device can be saved in the cloud storage system.
Those skilled in the art will understand that it is also possible to select an I frame whose receiving time is closest to the specified sampling time, or select an I frame whose receiving time is before the specified sampling time and whose receiving time is closest to the specified sampling time, etc. However, according to the receiving time of each video frame in the video stream data, the first frame I frame in the video stream data is extracted from the current time, compared with the I frame before the specified sampling time, the data is not required to be read from the storage node, the processing pressure of the storage node can be reduced, and the generation efficiency of the cover picture can be improved.
And S503, generating the latest cover picture of the monitoring equipment to be previewed based on the extracted I frame.
And processing the I frame by a related decoding method to obtain an image of the I frame, namely a cover picture of the monitoring equipment to be previewed.
S504, storing the cover pictures of the monitoring equipment to be previewed in a storage node.
When the client needs to extract the cover pictures for display, the client is random, so the cover pictures also need to be stored, and cover picture display services are provided for different platform clients at any time. In a possible embodiment, referring to fig. 6, the storing the cover picture of the monitoring device to be previewed in the storage node includes:
s5041, whether the history cover pictures of the monitoring equipment to be previewed are stored in the storage node is judged.
And S5042, if yes, deleting the historical cover pictures of the monitoring equipment to be previewed, and storing the currently generated cover pictures of the monitoring equipment to be previewed.
And S5043, if not, storing the currently generated cover picture of the monitoring equipment to be previewed.
In one possible embodiment, the picture of the cover page of the monitoring device to be previewed is stored in the system disk of the storage node.
The cloud storage system may be a distributed storage system, and in a possible implementation, the architecture of the cloud storage system may be as shown in fig. 2, where the management node is configured to be responsible for load balancing of each storage node and manage each storage node, and the storage node is configured to generate each cover page picture and store video stream data and the cover page picture. The storage nodes comprise system disks and data disks. The cover pictures are mainly used for being provided for the platform client side to be extracted and displayed, and when the platform client side needs to extract the cover pictures to be displayed is uncertain, the cover pictures also need to be stored so as to provide cover picture display service for different platform client sides at any time.
Because the extraction of the cover pictures has instantaneity, a large number of display of the cover pictures of the monitoring equipment need to be rapidly carried out. The inventor finds in research that if the cover picture is stored in the data disc together with the video stream data, the frequent reading and writing of the cover picture can affect the video stream data storage performance. In addition, as the video stream data storage in the data disk is generally used in a manner of virtualization into a resource pool, a special partition space is also needed to store the front cover picture, and the implementation process is complicated. Considering that the number of monitoring devices in charge of each storage node is limited, generally below 500 routes, each monitoring device only needs to store one cover picture, the size of the cover picture is calculated according to 2MB (megabyte), the total required storage space is about 1GB (gigabyte), and after all the cover pictures of the accessed monitoring devices are generated, the size of the storage space occupied by the cover pictures will not increase continuously. Therefore, for each storage node, the cover picture of the monitoring device accessed by the storage node may be stored in the system disk of the storage node, for example, a directory may be newly created in the system disk of the storage node for storing the cover picture.
The embodiment of the application further provides a preview method, which is applied to the client and comprises the following steps:
step A, sending a preview request aiming at a cover picture of the target monitoring equipment to a cloud storage system.
The preview method is applied to the client side, and therefore can be achieved through the client side. Specifically, the client may be a personal computer or a smart phone.
The target monitoring device can be any monitoring device, and the cloud storage system is responsible for storing video stream data acquired by the target monitoring device. When the cover picture of the target monitoring device needs to be displayed, the client generates a preview request for the cover picture of the target monitoring device and sends the preview request to the cloud storage system.
And B, receiving a cover picture of the target monitoring device returned by the cloud storage system, wherein the cover picture of the target monitoring device is generated according to an I frame of video stream data acquired by the target monitoring device.
And the client receives a cover page picture of the target monitoring device returned by the cloud storage system. The generation process of the cover picture of the target monitoring device may refer to the generation process of the cover picture in the preview method, and details are not described here.
And step C, displaying a cover picture of the target monitoring equipment at a preview position corresponding to the target monitoring equipment.
And the client displays the cover picture of the target monitoring equipment in the preview position corresponding to the target monitoring equipment. As will be appreciated by those skilled in the art, different preview locations are set in the client in advance for different monitoring devices, and the client may send a preview request for a cover picture of one or more monitoring devices. For each monitoring device, a cover picture of the monitoring device needs to be displayed at a preview position corresponding to the monitoring device.
In one possible implementation, the data interaction process of the cloud storage system and the client may be as shown in fig. 7, wherein the architecture of the cloud storage system is as shown in fig. 2. 1. The method comprises the steps that a client sends a preview request for a cover picture of target monitoring equipment to a management node; 2. the management node inquires a storage path of a cover picture of the target monitoring equipment from the database according to the identification of the target monitoring equipment; 3. the management node acquires a storage path of a cover picture of the target monitoring equipment; 4. the management node sends a storage path of a cover picture of the target monitoring equipment to the client; 5. the client side fetches the stream from the corresponding storage node according to the storage path of the cover picture of the target monitoring equipment; 6. the client acquires a cover picture of the target monitoring equipment.
In the embodiment of the application, a cover picture of a target monitoring device in a cloud storage system is obtained, and the cover picture is generated according to an I frame of the target monitoring device; and the cover picture of the target monitoring device is displayed in the display area corresponding to the target monitoring device, so that a user can visually determine the corresponding relation between the monitoring device and the monitoring scene according to the cover picture, and the user can visually know the condition of the monitoring area.
In a possible implementation manner, a user may play video stream data through a cover picture, and the preview method applied to the client in the embodiment of the present application further includes:
step one, when a triggering instruction of a user for a cover image of the target monitoring device is obtained, a video stream data display instruction for the target monitoring device is generated.
The user may click the cover image or the related button of the target monitoring device through a mouse, or click the cover image or the related button of the target monitoring device through a touch screen.
And step two, sending a video stream data display instruction for the target monitoring equipment, so that the cloud storage system returns the video stream data of the target monitoring equipment after receiving the video stream data display instruction for the target monitoring equipment.
The client sends a video stream data display instruction for the target monitoring device to the cloud storage system. And after receiving the display instruction, the cloud storage system returns the video stream data of the target monitoring equipment to the client.
And step three, acquiring video stream data of the target monitoring equipment and displaying the video stream data of the target monitoring equipment.
The client receives video stream data of the target monitoring device and displays the video stream data of the target monitoring device in a preset display window.
An embodiment of the present application further provides a preview system, where the preview system includes:
a cloud storage system and a client;
the cloud storage system is used for acquiring video stream data acquired by the target monitoring equipment; extracting I frames in the video stream data; generating a cover picture according to the I frame;
the client is used for sending a preview request of a cover picture for the target monitoring equipment to the cloud storage system;
the cloud storage system is further configured to send the cover picture of the target monitoring device to a client sending the preview request after receiving the preview request for the cover picture of the target monitoring device;
the client is further used for receiving a cover picture of the target monitoring device returned by the cloud storage system; and displaying a cover image of the target monitoring equipment at a preview position corresponding to the target monitoring equipment.
In a possible implementation manner, the cloud storage system may further implement any one of the above preview methods applied to the cloud storage system, and the client may further implement any one of the above preview methods applied to the client.
In one possible implementation, the preview system further includes: a plurality of monitoring devices;
the monitoring equipment is used for acquiring video stream data of a specified monitoring area and sending the acquired video stream data to the cloud storage system.
An embodiment of the present application further provides a preview apparatus, referring to fig. 8, where the apparatus includes:
a storage address obtaining module 801, configured to obtain, after obtaining a preview request of a target client, a target storage address of a jacket picture closest to a timestamp of a monitoring device to be previewed at a current time according to an identifier of the monitoring device to be previewed in the preview request, where the target storage address includes an address of a storage node storing the jacket picture of the monitoring device to be previewed, and the jacket picture of the monitoring device to be previewed is generated based on an I frame in video stream data of the monitoring device to be previewed received in real time;
a storage address sending module 802, configured to send the target storage address to the target client, so that the target client obtains and previews a cover picture of the monitoring device to be previewed according to the target storage address.
In a possible embodiment, the above apparatus further comprises:
the video stream data receiving module is used for receiving the video stream data acquired by the monitoring equipment to be previewed in real time;
an I frame extraction module, configured to extract an I frame with a timestamp closest to a current time from the video data;
the cover picture generating module is used for generating the latest cover picture of the monitoring equipment to be previewed based on the extracted I frame;
and the cover picture storage module is used for storing the cover picture of the monitoring equipment to be previewed in a storage node.
In a possible implementation manner, the cover picture storage module is specifically configured to: and storing the cover pictures of the monitoring equipment to be previewed in a system disk of a storage node.
In a possible implementation manner, the I-frame extraction module is specifically configured to: according to a preset sampling period, when a specified sampling time is reached, extracting a first frame I frame in the video stream data of the monitoring equipment to be previewed from the specified sampling time.
In a possible implementation manner, the cover picture storage module is specifically configured to: judging whether the storage node stores the history cover pictures of the monitoring equipment to be previewed or not; if so, deleting the historical cover pictures of the monitoring equipment to be previewed, and storing the currently generated cover pictures of the monitoring equipment to be previewed; and if not, storing the currently generated cover page picture of the monitoring equipment to be previewed.
An embodiment of the present application further provides a preview apparatus, referring to fig. 9, applied to a client, where the apparatus includes:
the image preview request module 901 is configured to send a preview request for a cover image of the target monitoring device to the cloud storage system;
a cover picture receiving module 902, configured to receive a cover picture of the target monitoring device returned by a cloud storage system, where the cover picture of the target monitoring device is generated according to an I frame of video stream data acquired by the target monitoring device;
and a cover picture display module 903, configured to display a cover picture of the target monitoring device at a preview position corresponding to the target monitoring device.
Optionally, the preview device applied to the client in the embodiment of the present application further includes:
the video preview request module is used for generating a video stream data display instruction for the target monitoring equipment when acquiring a trigger instruction of a user for a cover image of the target monitoring equipment;
the video data receiving module is used for sending a video stream data display instruction for the target monitoring equipment so that the cloud storage system returns video stream data of the target monitoring equipment after receiving the video stream data display instruction for the target monitoring equipment;
and the video data display module is used for acquiring the video stream data of the target monitoring equipment and displaying the video stream data of the target monitoring equipment.
An embodiment of the present application further provides an electronic device, including: a processor and a memory;
the memory is used for storing computer program
When the processor is used for executing the computer program stored in the memory, the following steps are realized:
sending a preview request for a cover picture of the target monitoring device to a cloud storage system;
receiving a cover picture of the target monitoring device returned by a cloud storage system, wherein the cover picture of the target monitoring device is generated according to an I frame of video stream data acquired by the target monitoring device;
and displaying a cover picture of the target monitoring equipment at a preview position corresponding to the target monitoring equipment.
Optionally, referring to fig. 10, the electronic device according to the embodiment of the present application further includes a communication interface 1002 and a communication bus 1004, where the processor 1001, the communication interface 1002, and the memory 1003 complete communication with each other through the communication bus 1004.
Optionally, when the processor is configured to execute the computer program stored in the memory, any one of the above preview methods applied to the client may be further implemented.
The communication bus mentioned in the electronic device may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus.
The communication interface is used for communication between the electronic equipment and other equipment.
The Memory may include a Random Access Memory (RAM) or a Non-Volatile Memory (NVM), such as at least one disk Memory. Optionally, the memory may also be at least one memory device located remotely from the processor.
The Processor may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component.
An embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements any one of the above preview methods applied to the cloud storage system.
An embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements any one of the above preview methods applied to the client.
It should be noted that, in this document, the technical features in the various alternatives can be combined to form the scheme as long as the technical features are not contradictory, and the scheme is within the scope of the disclosure of the present application. Relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the embodiments of the apparatus, the electronic device, and the storage medium, since they are substantially similar to the method embodiments, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the method embodiments.
The above description is only for the preferred embodiment of the present application, and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application are included in the protection scope of the present application.
Claims (10)
1. A cloud storage system providing a preview function, the system comprising:
a management node and a plurality of storage nodes;
the storage node is used for receiving video stream data acquired by appointed monitoring equipment in real time; extracting an I frame from the video stream data to generate a cover picture of the appointed monitoring equipment; storing the video stream data and the cover pictures of the appointed monitoring equipment;
the management node is used for acquiring a storage address of a cover picture corresponding to the monitoring equipment to be previewed as a target storage address according to the identification of the monitoring equipment to be previewed in the preview request after receiving the preview request of a target client, wherein the cover picture is the cover picture with the timestamp closest to the current moment, and the target storage address comprises the address of the storage node for storing the cover picture of the monitoring equipment to be previewed;
and sending the target storage address to the target client so that the target client can acquire and preview the cover picture of the monitoring equipment to be previewed according to the target storage address.
2. The cloud storage system of claim 1, wherein the storage node is specifically configured to: and storing the cover pictures of the specified monitoring equipment in a system disk of the storage node.
3. The cloud storage system of claim 1, wherein the storage node is further configured to send a storage address of the cover picture of the specified monitoring device and an identifier of the specified monitoring device to the management node;
the management node is further configured to receive a storage address of a cover picture of the specified monitoring device and an identifier of the specified monitoring device; and associating and storing the storage address of the cover picture of the specified monitoring equipment and the identification of the specified monitoring equipment.
4. The cloud storage system of claim 1, wherein the storage node is specifically configured to:
judging whether the storage node stores the historical cover picture of the target monitoring equipment or not;
if so, deleting the historical cover picture of the target monitoring equipment, and storing the currently generated cover picture of the target monitoring equipment;
and if not, storing the currently generated cover page picture of the target monitoring equipment.
5. The cloud storage system of claim 1, wherein the management node is further configured to: when a display request of the target client for the video stream data of the monitoring equipment to be previewed is received, acquiring a stream taking address of the video stream data of the monitoring equipment to be previewed; and returning the stream taking address to the target client, so that the target client acquires the video stream data of the monitoring equipment to be previewed according to the stream taking address and displays the video stream data of the target monitoring equipment.
6. A preview method, the method comprising:
after a preview request of a target client is obtained, according to an identifier of monitoring equipment to be previewed in the preview request, obtaining a target storage address of a cover picture corresponding to the monitoring equipment to be previewed, wherein the cover picture is the cover picture with a timestamp closest to the current moment, the target storage address comprises an address of a storage node for storing the cover picture of the monitoring equipment to be previewed, and the cover picture of the monitoring equipment to be previewed is generated on the basis of an I frame in video stream data of the monitoring equipment to be previewed, which is received in real time;
and sending the target storage address to the target client so that the target client can acquire and preview the cover picture of the monitoring equipment to be previewed according to the target storage address.
7. The method of claim 6, further comprising:
receiving video stream data acquired by the monitoring equipment to be previewed in real time;
extracting an I frame with a timestamp closest to the current time from the video data;
generating the latest cover picture of the monitoring equipment to be previewed based on the extracted I frame;
and storing the cover pictures of the monitoring equipment to be previewed in a storage node.
8. The method of claim 7, wherein storing the cover picture of the monitoring device to be previewed in a storage node comprises:
and storing the cover pictures of the monitoring equipment to be previewed in a system disk of a storage node.
9. The method of claim 7, wherein extracting the I-frame with the timestamp closest to the current time in the video data comprises:
according to a preset sampling period, when a specified sampling moment is reached, extracting a first frame I frame in video stream data of the monitoring equipment to be previewed from the specified sampling moment.
10. The method of claim 7, wherein storing the cover picture of the monitoring device to be previewed in a storage node comprises:
judging whether a storage node stores a history cover picture of the monitoring equipment to be previewed;
if so, deleting the historical cover pictures of the monitoring equipment to be previewed, and storing the currently generated cover pictures of the monitoring equipment to be previewed;
and if not, storing the currently generated cover picture of the monitoring equipment to be previewed.
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| PCT/CN2020/135015 WO2021115348A1 (en) | 2019-12-11 | 2020-12-09 | Cloud storage system providing preview function, and preview method and apparatus |
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| CN201911267302.4A CN111405237A (en) | 2019-12-11 | 2019-12-11 | Cloud storage system providing preview function and preview method |
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