CN110876090B - Video abstract playback method and device, electronic equipment and readable storage medium - Google Patents
Video abstract playback method and device, electronic equipment and readable storage medium Download PDFInfo
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- CN110876090B CN110876090B CN201811026894.6A CN201811026894A CN110876090B CN 110876090 B CN110876090 B CN 110876090B CN 201811026894 A CN201811026894 A CN 201811026894A CN 110876090 B CN110876090 B CN 110876090B
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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
- H04N21/47217—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 controlling playback functions for recorded or on-demand content, e.g. using progress bars, mode or play-point indicators or bookmarks
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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
Abstract
The application provides a video abstract playback method, a video abstract playback device, electronic equipment and a readable storage medium, wherein the method comprises the following steps: acquiring and storing a vehicle picture, the acquisition time of the vehicle picture and attribute information of the vehicle picture in video data of video source equipment; when a vehicle retrieval request is received, determining a first vehicle picture matched with a vehicle picture to be retrieved according to the vehicle picture to be retrieved carried in the vehicle retrieval request; and generating a video abstract according to the first vehicle picture and the acquisition time of the first vehicle picture, and playing back the video abstract. The method can improve the vehicle retrieval efficiency and accuracy and ensure the continuity of vehicle video tracking.
Description
Technical Field
The present application relates to video monitoring technologies, and in particular, to a method and an apparatus for playing back a video summary, an electronic device, and a readable storage medium.
Background
The video monitoring system is used as an important technical means for social security management, and is more and more widely applied and deployed in the field of social security maintenance. With the increase of the number of deployed monitoring devices and the expansion of the range, the data volume of the stored video recording data is larger and larger. If a user wants to find out the time periods and places where a specific target appears from video recording data, the user often needs to manually play back and find a large amount of video recording data, the time consumption is long, the user may neglect the search, and efficiency bottlenecks and incomplete risks exist in the aspects of video positioning and integrated display.
Disclosure of Invention
In view of the above, the present application provides a video summary playback method and apparatus.
Specifically, the method is realized through the following technical scheme:
according to a first aspect of embodiments of the present application, there is provided a video summary playback method, including:
acquiring and storing a vehicle picture, the acquisition time of the vehicle picture and attribute information of the vehicle picture in video data of video source equipment;
when a vehicle retrieval request is received, determining a first vehicle picture matched with a vehicle picture to be retrieved according to the vehicle picture to be retrieved carried in the vehicle retrieval request;
and generating a video abstract according to the first vehicle picture and the acquisition time of the first vehicle picture, and playing back the video abstract.
According to a second aspect of embodiments of the present application, there is provided a video summary playback apparatus, including:
the acquisition unit is used for acquiring a vehicle picture, the acquisition time of the vehicle picture and the attribute information of the vehicle picture in the video data of the video source equipment;
the storage unit is used for storing the vehicle picture, the acquisition time of the vehicle picture and the attribute information of the vehicle picture;
the retrieval unit is used for determining a first vehicle picture matched with the vehicle picture to be retrieved according to the vehicle picture to be retrieved carried in the vehicle retrieval request when the vehicle retrieval request is received;
and the processing unit is used for generating a video abstract according to the first vehicle picture and the acquisition time of the first vehicle picture and playing back the video abstract.
According to a third aspect of the embodiments of the present application, an electronic device is provided, which includes a processor, a communication interface, a memory, and a communication bus, where the processor, the communication interface, and the memory complete communication with each other through the communication bus;
a memory for storing a computer program;
and the processor is used for realizing the video abstract playback method steps when executing the program stored in the memory.
According to a fourth aspect of the embodiments of the present application, there is provided a computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, and when executed by a processor, the computer program implements the video summary playback step.
According to the video abstract generating method, the vehicle picture acquisition time and the vehicle picture attribute information in the video data of the video source device are obtained and stored, when a vehicle retrieval request is received, the first vehicle picture matched with the vehicle picture to be retrieved is determined according to the vehicle picture to be retrieved carried in the vehicle retrieval request, then the video abstract is generated according to the first vehicle picture and the first vehicle picture acquisition time, the video abstract is played back, the situation that the matched vehicle picture needs to be extracted from the video data in each vehicle retrieval is avoided, the vehicle retrieval efficiency and accuracy are improved, and the vehicle video tracking consistency is guaranteed.
Drawings
FIG. 1 is an architectural diagram illustrating a video summary playback system according to an exemplary embodiment of the present application;
FIG. 2 is a flow chart diagram illustrating a video summary playback method according to an exemplary embodiment of the present application;
FIG. 3 is a schematic flow chart illustrating a vehicle picture capture in accordance with an exemplary embodiment of the present application;
FIG. 4 is a schematic flow chart diagram illustrating a vehicle picture capture according to yet another exemplary embodiment of the present application;
fig. 5 is a schematic structural diagram of a video summary playback apparatus according to an exemplary embodiment of the present application;
fig. 6 is a schematic diagram illustrating a hardware structure of an electronic device according to an exemplary embodiment of the present application.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
In order to make those skilled in the art better understand the technical solutions provided by the embodiments of the present application, a brief description is first given below of a system architecture to which the embodiments of the present application are applicable.
Referring to fig. 1, which is a schematic structural diagram of a video summary playback system according to an embodiment of the present disclosure, as shown in fig. 1, the video summary generation system may include a video source device and a retrieval device; wherein:
the video source device may provide video data; the video data may include real-time video data or video recording data (herein, simply referred to as recording data).
The retrieval device can acquire and store the vehicle picture, the acquisition time of the vehicle picture, the attribute information of the vehicle picture and the like in the video data of the video source device.
The acquisition time of the vehicle picture is the time when the front-end video acquisition device acquires (for example, captures) the vehicle picture or the vehicle picture appears in the video image acquired by the front-end video acquisition device.
When the retrieval device receives a vehicle retrieval request, a vehicle picture (referred to as a first vehicle picture) matched with the vehicle picture to be retrieved can be determined according to the vehicle picture to be retrieved carried in the vehicle retrieval request and attribute information of the vehicle picture stored by the retrieval device, and then a video abstract is generated according to the first vehicle picture and the acquisition time of the first vehicle picture and is played back.
It should be noted that, in the embodiment of the present application, the Video source device may be a front-end Video capture device (e.g., an IPC (Internet Protocol Camera)) or a Video recording storage device (e.g., an NVR (Network Video Recorder)); the retrieval device may be NVR (with target search function) or a device for vehicle retrieval deployed in a video surveillance system.
When the video source device is NVR, the video source device and the search device may be the same device.
In addition, one video source device may provide video data for a plurality of search devices, and one search device may also obtain video data from a plurality of video source devices (a one-to-one example is illustrated).
In order to make the aforementioned objects, features and advantages of the embodiments of the present application more comprehensible, embodiments of the present application are described in detail below with reference to the accompanying drawings.
Referring to fig. 2, a flow chart of a video summary playback method provided in an embodiment of the present application is schematically illustrated, where the video summary playback method may be applied to a retrieval device, and as shown in fig. 2, the video summary playback method may include the following steps:
and S200, acquiring and storing a vehicle picture, the acquisition time of the vehicle picture and the attribute information of the vehicle picture in the video data of the video source equipment.
In the embodiment of the application, in order to improve the efficiency of vehicle retrieval, the retrieval device can acquire and store the vehicle picture information in the video data of the video source device.
The vehicle picture information may include, but is not limited to, a vehicle picture, a time of capturing the vehicle picture, attribute information of the vehicle picture, and the like.
It should be noted that, in the embodiment of the present application, the acquisition time of the vehicle picture may be carried in the vehicle picture (for example, the acquisition time of the vehicle picture is displayed at a specific position (e.g., a lower left corner or a lower right corner) in the vehicle picture), or the acquisition time of the vehicle picture may be independent of the vehicle picture, and specific implementation thereof is not described herein again.
In the embodiment of the present application, the attribute information of the vehicle picture may include, but is not limited to, one or more of the following:
1) the position of the vehicle in the vehicle picture;
2) the position of the license plate in the vehicle picture;
3) a license plate number;
4) the color of the license plate;
5) a country type;
6) body color;
7) a brand of vehicle;
8) vehicle type (such as large bus, truck or minibus);
9) whether the driver fastens the safety belt or not;
10) and whether the driver is making a call.
In one embodiment of the present application, the acquiring of the vehicle picture, the acquisition time of the vehicle picture, and the attribute information of the vehicle picture in the video data of the video source device may include:
and receiving the vehicle picture sent by the video source equipment, the acquisition time of the vehicle picture and the attribute information of the vehicle picture.
In this embodiment, when the video source device has a vehicle picture acquisition function (such as a vehicle picture capturing function or a vehicle target detection function) and a vehicle picture analysis function, the video source device may directly acquire the vehicle picture, the acquisition time of the vehicle picture, and the attribute information of the vehicle picture, and transmit the vehicle picture, the acquisition time of the vehicle picture, and the attribute information of the vehicle picture to the retrieval device.
The retrieval device can receive the vehicle picture sent by the video source device, the acquisition time of the vehicle picture and the attribute information of the vehicle picture.
For example, assuming that the video source device is an IPC having a vehicle picture capturing function and a vehicle picture analyzing function, the video source device may capture a vehicle picture (and record capturing time (i.e., acquisition time)) of the vehicle picture, and perform vehicle picture analysis on the captured vehicle picture to extract attribute information of the vehicle picture, and further, the video source device may send the vehicle picture, the acquisition time of the vehicle picture, and the attribute information of the vehicle picture to the retrieval device, such as NVR, and the retrieval device stores the received vehicle picture, the acquisition time of the vehicle picture, and the attribute information of the vehicle picture.
In another embodiment of the present application, the acquiring of the vehicle picture, the acquisition time of the vehicle picture, and the attribute information of the vehicle picture in the video data of the video source device may include:
receiving a vehicle picture sent by video source equipment and the acquisition time of the vehicle picture;
and modeling the vehicle picture, and extracting attribute information of the vehicle picture.
In this embodiment, when the video source device has a vehicle picture acquisition function (such as a vehicle picture capturing function or a vehicle object detection function), the video source device may acquire the vehicle picture and the acquisition time of the vehicle picture and transmit the vehicle picture and the acquisition time of the vehicle picture to the retrieval device.
When the retrieval equipment receives the vehicle picture sent by the video source equipment and the acquisition time of the vehicle picture, modeling can be carried out on the vehicle picture, attribute information of the vehicle picture is extracted, and then the retrieval equipment can acquire the vehicle picture, the acquisition time of the vehicle picture and the attribute information of the vehicle picture in video data of the video source equipment.
For example, assuming that the video source device is an IPC with a vehicle picture capturing function, the video source device may capture a vehicle picture (and record capturing time (i.e., acquisition time) of the vehicle picture), and send the captured vehicle picture and the acquisition time of the vehicle picture to the retrieval device, such as NVR; when the retrieval equipment receives the vehicle picture, modeling can be carried out on the vehicle picture, attribute information of the vehicle picture is extracted, and then the retrieval equipment can store the vehicle picture, the acquisition time of the vehicle picture and the attribute information of the vehicle picture.
In another embodiment of the present application, the acquiring of the vehicle picture, the acquisition time of the vehicle picture, and the attribute information of the vehicle picture in the video data of the video source device may include:
receiving vehicle picture information, vehicle picture acquisition time and first attribute information of the vehicle picture, wherein the vehicle picture information, the vehicle picture acquisition time and the first attribute information are sent by video source equipment;
modeling the vehicle picture, and extracting second attribute information of the vehicle picture;
and determining the attribute information of the vehicle picture according to the first attribute information of the vehicle picture and the second attribute information of the vehicle picture.
In this embodiment, when the video source device has a vehicle picture acquisition function (such as a vehicle picture capturing function or a vehicle object detection function) and a vehicle picture analysis function, the video source device may directly acquire the vehicle picture, the acquisition time of the vehicle picture, and attribute information of the vehicle picture (referred to herein as first attribute information of the vehicle picture), and transmit the vehicle picture, the acquisition time of the vehicle picture, and the first attribute information of the vehicle picture to the retrieval device.
When the retrieval device receives the vehicle picture sent by the video source device, the received vehicle picture can be modeled, and the attribute information of the vehicle picture (referred to as second attribute information of the vehicle picture herein) can be extracted.
For any vehicle picture, the retrieval device can compare first attribute information of the vehicle picture with second attribute information of the vehicle picture, and attribute information which exists in the first attribute information but does not exist in the second attribute information or attribute information which does not exist in the first attribute information but exists in the second attribute information is added into the attribute information of the vehicle picture; and adding the attribute information in the second attribute information into the attribute information of the vehicle picture to obtain the attribute information of the vehicle picture for the attribute information existing in both the first attribute information and the second attribute information.
In this embodiment, the retrieval device may also directly use the second attribute information of the vehicle picture as the attribute information of the vehicle picture.
In another embodiment of the application, the acquiring of the vehicle picture, the acquisition time of the vehicle picture, and the attribute information of the vehicle picture in the video data of the video source device may include:
carrying out vehicle target detection on video data provided by video source equipment to obtain vehicle pictures in the video data and the acquisition time of the vehicle pictures;
and modeling the vehicle picture, and extracting attribute information of the vehicle picture.
In this embodiment, when the video source device does not have a vehicle picture acquiring function, or the video source device and the retrieving device are the same device (such as NVR), the retrieving device may directly perform vehicle target detection on video data provided by the video source device to obtain a vehicle picture in the video data and a collecting time of the vehicle picture; after the retrieval device obtains the vehicle picture in the video data, modeling can be further performed on the vehicle picture, and attribute information of the vehicle picture is extracted.
For example, assuming that the video source device is an IPC without a vehicle picture capturing function, the video source device may send the acquired video data to a retrieval device, such as an NVR; when the retrieval equipment receives the video data sent by the video source equipment, the retrieval equipment can detect the vehicle target of the received video data to obtain the vehicle picture in the video data and the acquisition time of the vehicle picture (the time of the vehicle picture appearing in the video data), models the vehicle picture, extracts the attribute information of the vehicle picture, and further can store the vehicle picture, the acquisition time of the vehicle picture and the attribute information of the vehicle picture.
In the embodiment of the application, after the retrieval device acquires the vehicle picture, the acquisition time of the vehicle picture and the attribute information of the vehicle picture in the video data of the video source device, the acquired vehicle picture, the acquisition time of the vehicle picture and the attribute information of the vehicle picture can be stored.
In one embodiment of the present application, the storing of the vehicle picture, the collection time of the vehicle picture, and the attribute information of the vehicle picture in the video data of the video source device may include:
storing the vehicle picture;
and recording the storage position of the vehicle picture, the acquisition time of the vehicle picture and the attribute information of the vehicle picture in the vehicle picture information table.
In this embodiment, after the retrieval device acquires the vehicle picture, the collection time of the vehicle picture, and the attribute information of the vehicle picture, the acquired vehicle picture may be stored, and the storage location of the vehicle picture, the collection time of the vehicle picture, and the attribute information of the vehicle picture may be recorded in a vehicle picture information table, which may be in a format as shown in table 1:
TABLE 1
| Position information of vehicle picture | Acquisition time of vehicle picture | Attribute information of vehicle picture |
| Position information of vehicle picture 1 | Acquisition time of vehicle picture 1 | Attribute information of vehicle picture 1 |
| Position information of vehicle picture 2 | Acquisition time of vehicle picture 2 | Attribute information of vehicle picture 2 |
| … | … | … |
The position information of the vehicle picture may be a position offset and a length of the vehicle picture in a storage space (e.g., a hard disk).
It should be appreciated that the above implementation manner for storing the vehicle picture, the collection time of the vehicle picture, and the attribute information of the vehicle picture in the video data of the video source device is only one specific example for storing the vehicle picture, the collection time of the vehicle picture, and the attribute information of the vehicle picture in the present application, and is not limited to the scope of the present application.
For example, in one example, the vehicle picture, the acquisition time of the vehicle picture, and the attribute information of the vehicle picture may be stored in the same database (i.e., the vehicle picture is directly stored in the database in a binary form); in this example, the vehicle picture, the acquisition time of the vehicle picture, and the attribute information of the vehicle picture may be stored in the same data table, and at this time, the storage location of the vehicle picture does not need to be additionally recorded.
Or, in another example, the vehicle picture may still be stored first to obtain the storage location of the vehicle picture, but when the storage location of the vehicle picture, the acquisition time of the vehicle picture, and the attribute information of the vehicle picture are stored, the storage location of the vehicle picture, the acquisition time of the vehicle picture, and the attribute information of the vehicle picture are not stored in the form of a data table, but are stored in other forms, such as a tree structure or a file form, and specific implementation thereof is not described herein again.
Step S210, when a vehicle retrieval request is received, determining a first vehicle picture matched with the vehicle picture to be retrieved according to the vehicle picture to be retrieved carried in the vehicle retrieval request.
In the embodiment of the application, the retrieval device can provide a vehicle retrieval function, and retrieve the matched vehicle picture and the acquisition time of the vehicle picture according to the vehicle picture to be retrieved carried in the received vehicle retrieval request in a picture searching mode.
For example, the retrieval device may provide a vehicle retrieval request interface, which may include a picture input or/and selection area of a vehicle to be retrieved, input or/and select a picture of the vehicle to be retrieved by a user in the vehicle retrieval request interface, and submit a vehicle retrieval request.
When the retrieval device receives a vehicle retrieval request, modeling is carried out on a vehicle picture to be retrieved, attribute information of the vehicle picture to be retrieved is extracted, and further the retrieval device can query the stored vehicle picture, the acquisition time of the vehicle picture and the attribute information of the vehicle picture according to the attribute information of the vehicle picture to be retrieved, and determines the vehicle picture corresponding to the attribute information of the vehicle picture matched with the attribute information of the vehicle picture to be retrieved as the vehicle picture (referred to as a first vehicle picture) matched with the attribute information of the vehicle picture to be retrieved.
For example, assuming that the retrieval device stores the vehicle picture, the collection time of the vehicle picture, and the attribute information of the vehicle picture in the form of the vehicle picture information table (see the related description in step S200), the retrieval device may query the attribute information of the vehicle picture in the vehicle picture information table according to the attribute information of the vehicle picture to be retrieved to obtain a vehicle picture information entry matched with the attribute information of the vehicle picture to be retrieved, and obtain the storage location of the vehicle picture in the vehicle picture information entry (i.e., the storage location of the first vehicle picture).
Further, the retrieval device may acquire the first vehicle picture from the specified storage space according to the storage location of the first vehicle picture.
It should be appreciated that the above retrieval of the vehicle picture information is only a specific example in the case of storing the vehicle picture information in the form of the vehicle picture information table, and is not a limitation to the scope of the present application, that is, in the embodiment of the present application, the retrieval of the vehicle picture information may also be implemented in other ways.
For example, when the vehicle picture, the acquisition time of the vehicle picture, and the attribute information of the vehicle picture are stored in the same data table in the database, the retrieval device may directly query the entry where the attribute information of the vehicle picture is located in the database according to the attribute information of the vehicle picture to be retrieved, and acquire the vehicle picture information from the queried entry.
And S220, generating a video abstract according to the first vehicle picture and the acquisition time of the first vehicle picture, and playing back the video abstract.
In the embodiment of the application, after the retrieval device acquires the first vehicle picture matched with the vehicle picture to be retrieved and the acquisition time of the first vehicle picture, a video abstract of the vehicle with the retrieval can be generated according to the acquisition time of the first vehicle picture and the acquisition time of the first vehicle picture, and the video abstract of the vehicle to be detected is played back.
In one embodiment of the present application, the generating the video summary according to the first vehicle picture and the capturing time of the first vehicle picture may include:
and generating a video abstract according to the first vehicle pictures sequenced according to the time sequence from morning to evening.
In this embodiment, the retrieval device may generate the video summary directly from the first vehicle pictures ordered in time from morning to evening.
For example, when the number of the first vehicle pictures retrieved by the retrieval device exceeds a preset number threshold (which may be set according to actual requirements, such as 200, 500, and the like), and the difference between the acquisition times of the adjacent first vehicle pictures sorted in the order from morning to evening does not exceed a preset time threshold (which may be set according to actual requirements, such as 1 second, 2 seconds, and the like), the retrieval device may directly generate the video summary according to the first vehicle pictures sorted in the order from morning to evening.
In another embodiment of the present application, the generating the video summary according to the first vehicle picture and the capturing time of the first vehicle picture may include:
for any first vehicle picture, determining a target video clip corresponding to the first vehicle picture; the target video clip is video data between the nth second before the acquisition time of the first vehicle picture and the mth second after the acquisition time of the first vehicle picture;
and generating a video abstract of the target to be searched according to each target video clip.
In this embodiment, after the retrieval device acquires the first vehicle picture and the acquisition time of the first vehicle picture, for any first vehicle picture, the retrieval device may determine, as the target video segment corresponding to the first vehicle picture, video data between an nth second before the acquisition time of the first vehicle picture and an mth second after the acquisition time of the first vehicle picture.
Wherein n and m are non-negative numbers
When the retrieval equipment determines the target video segments corresponding to the first vehicle pictures, the target video segments corresponding to the first vehicle pictures can be fused, namely, the target video segments are sequenced and spliced according to the starting time or/and the ending time of the target video segments so as to generate the video abstract of the vehicle to be retrieved.
Further, in the embodiment of the present application, it is considered that when there are video data of multiple video data channels and there is overlap in scenes covered by the multiple video data channels (for example, there is overlap in regions in the monitoring view ranges of multiple IPCs), there may be a case where the same object appears in the video data of the multiple video data channels at the same time point, and at this time, in order to avoid video data with too high similarity appearing in the video summary, the first vehicle picture may be subjected to de-duplication processing.
Accordingly, in one embodiment of the present application, the generating the video summary according to the first vehicle picture and the collection time of the first vehicle picture may include:
when a plurality of first vehicle pictures with the same acquisition time exist, determining a starting time point and an ending time point of a video segment corresponding to any one of the plurality of first vehicle pictures; wherein the starting time point is the nth second before the acquisition time of the first vehicle picture, and the ending time point is the mth second after the acquisition time of the first vehicle picture;
searching whether the video data of the video data channel to which the first vehicle picture belongs has the I frame of the starting time point and whether the I frame of the ending time exists;
if the target video segment exists, discarding the rest first vehicle pictures in the plurality of first vehicle pictures, and determining the video segments corresponding to the first vehicle pictures as the target video segments.
In this embodiment, when there are a plurality of first vehicle pictures with the same collection time, the retrieval device may determine, according to a preset policy, a start time point and an end time point of a video segment corresponding to each first vehicle picture in the plurality of first vehicle pictures.
For any first vehicle picture in the plurality of first vehicle pictures, the starting time point of the video segment corresponding to the first vehicle picture is nth second before the acquisition time of the first vehicle picture, and the ending time point is mth second after the acquisition time of the first vehicle picture.
After the retrieval device determines the starting time point and the ending time point, it may search whether an I frame of the starting time point exists in the video data of the video data channel to which the first vehicle picture belongs (i.e., whether the video data of the starting time point exists in the video data channel), and whether an I frame of the ending time point exists in the video data channel (i.e., whether the video data of the ending time point exists in the video data channel).
If the first vehicle picture exists, the retrieval device may directly determine the video segment corresponding to the first vehicle picture as the target video segment, and discard the remaining first vehicle pictures in the plurality of first vehicle pictures.
Further, in this embodiment, when there is no I frame at the start time point (n seconds before the collection time of the first picture information) or/and no I frame at the end time point (m seconds after the collection time of the first picture information) in the plurality of first vehicle pictures, for any first vehicle picture in the plurality of first vehicle pictures, if there is no I frame at the start time point in the video data channel to which the first vehicle picture belongs, the retrieval device may increase the start time point of the video segment corresponding to the first vehicle picture by 1 second and search for whether there is an I frame at the start time point, and if there is no I frame at the start time point, increase the start time point of the video segment corresponding to the first vehicle picture by 1 second again and search for whether there is an I frame at the start time point, and repeat this operation until the start time point is searched for in the video data of the video data channel to which the first vehicle picture belongs (more specifically, the start time point is searched for in the video data channel to which the first vehicle picture belongs The new start time point), or the start time point and the end time point of the video segment corresponding to the first vehicle picture are the same.
Similarly, if the I frame of the ending time point does not exist in the video data of the video data channel to which the first vehicle picture belongs, the retrieval device may decrease the ending time point of the video segment corresponding to the first vehicle picture by 1 second, search whether the I frame of the ending time point exists, if the I frame of the ending time point does not exist, decrease the ending time point of the video segment corresponding to the first vehicle picture by 1 second again, search whether the I frame of the ending time point exists, and repeat the operation until the I frame of the ending time point (updated ending time point) is searched in the video data of the video data channel to which the first vehicle picture belongs, or the starting time point and the ending time point of the video segment corresponding to the first vehicle picture are the same.
After the retrieval device determines the starting time point and the ending time point of the video segments corresponding to the plurality of first vehicle pictures according to the above manner, the retrieval device may determine the first vehicle picture of which the corresponding video segment has the longest duration (the difference between the ending time point and the starting time point is the largest) in the plurality of first vehicle pictures, determine the video segment corresponding to the first vehicle picture as the target video segment, and discard the remaining first vehicle pictures in the plurality of first vehicle pictures.
In this embodiment, after the retrieval device determines the target video segments, a video summary may be generated according to each target video segment.
It should be noted that, in this embodiment, when the number of the first vehicle pictures with the longest duration in the corresponding video segments in the plurality of first vehicle pictures is greater than 1, one first vehicle picture is selected from the first vehicle pictures according to a preset policy, and the video segment corresponding to the selected first vehicle picture is determined as the target video segment.
For example, the first vehicle picture with the earliest starting time point, the first vehicle picture with the latest ending time point, or a random selection may be selected.
In addition, in the embodiment of the application, when there are a plurality of first vehicle pictures with the same acquisition time, the de-duplication processing of the plurality of first vehicle pictures can also be realized manually.
For example, the retrieval device may display the plurality of first vehicle pictures in a designated interface, select, by the user, a first vehicle picture that needs to be retained, and discard the first vehicle pictures with the same remaining acquisition time, which is not described herein in detail.
In order to enable those skilled in the art to better understand the technical solutions provided by the embodiments of the present application, the technical solutions provided by the embodiments of the present application are described below with reference to specific examples.
In this embodiment, a video source device is IPC, and a retrieval device is NVR as an example, where an intelligent chip with an intelligent analysis function is loaded in the NVR.
In this embodiment, the video summary playback scheme is implemented as follows:
1. vehicle picture information acquisition
Take the example that IPC has the function of capturing the vehicle picture
1) The IPC carries out vehicle picture snapshot and transmits the snapshot vehicle picture and the acquisition time of the vehicle picture to the NVR;
in this embodiment, the IPC may further capture a vehicle picture during the process of acquiring the real-time video stream, and transmit the captured vehicle picture and the time for acquiring the vehicle picture (i.e., the time for acquiring the vehicle picture) to the NVR.
It should be noted that, in this embodiment, the IPC also transmits the real-time video stream to the NVR, and the NVR stores the video record according to the preset policy.
2) The NVR extracts a characteristic value in the vehicle picture, models the vehicle picture according to the characteristic value of the vehicle picture and extracts attribute information of the vehicle picture;
in this embodiment, when the NVR receives the vehicle picture transmitted by the IPC, the intelligent analysis may be performed on the vehicle picture through the intelligent chip.
The intelligent chip can extract the characteristic value of the vehicle in the vehicle picture by using the algorithm library, model the vehicle picture according to the extracted characteristic value by using the algorithm library, and extract the attribute information of the vehicle picture.
In this embodiment, a schematic flow chart of the NVR acquiring the vehicle picture information may be as shown in fig. 3.
3) The NVR stores the vehicle picture, the acquisition time of the vehicle picture and the attribute information of the vehicle picture, and the specific implementation is described in the point 2.
Take the example that IPC does not have the function of capturing pictures
1) The NVR detects the target of the video or the real-time video stream to obtain the vehicle picture and the acquisition time of the vehicle picture;
in this embodiment, the NVR may perform target detection on the video recording or the real-time video stream through the intelligent chip to obtain the vehicle picture in the video recording or the real-time video stream and the capturing time of the vehicle picture (i.e., the time when the vehicle picture appears in the video data).
2) The NVR extracts a characteristic value in the vehicle picture, models the vehicle picture according to the characteristic value of the vehicle picture and extracts attribute information of the vehicle picture;
in this embodiment, when the NVR receives the vehicle picture transmitted by the IPC, the intelligent analysis may be performed on the vehicle picture through the intelligent chip.
The intelligent chip can extract the characteristic value of the vehicle in the vehicle picture by using the algorithm library, model the vehicle picture according to the extracted characteristic value by using the algorithm library, and extract the attribute information of the vehicle picture.
In this embodiment, a flow chart of acquiring the vehicle picture information by the NVR may be as shown in fig. 4.
3) The NVR stores the vehicle picture, the acquisition time of the vehicle picture and the attribute information of the vehicle picture, and the specific implementation is described in the point 2.
2. Vehicle picture information storage
1) And the NVR stores the vehicle picture to obtain the storage position of the vehicle picture.
For the vehicle picture information, establishing a vehicle picture information related database table (vehicle table); the main fields in the VehicleTable comprise the storage position of the vehicle picture, the acquisition time of the vehicle picture and the attribute information of the vehicle picture.
It should be noted that, in this embodiment, the NVR may also use model data of the vehicle picture, and specific implementation thereof is not described herein again.
After the vehicle picture is stored in the hard disk by the NVR, the position offset and the length of the hard disk where the vehicle picture is located (i.e. the storage position of the vehicle picture) can be obtained.
2) And the NVR records the storage position of the vehicle picture, the acquisition time of the vehicle picture and the attribute information of the vehicle picture in the VehicletTable.
3. Vehicle retrieval
1) Receiving a vehicle retrieval request, wherein the vehicle retrieval request carries a vehicle picture to be retrieved;
in this embodiment, the NVR may provide a vehicle retrieval interface including a picture input or/and selection area for a vehicle to be retrieved.
The user can input or/and select the vehicle picture to be retrieved through the vehicle retrieval interface and submit the vehicle retrieval request.
2) The NVR models the vehicle picture to be retrieved and extracts the attribute information of the vehicle picture to be retrieved;
3) the NVR inquires the storage position of the matched vehicle picture and the acquisition time of the vehicle picture from the VehicletTable according to the attribute information of the vehicle picture to be retrieved;
in this embodiment, the NVR may query the vehiclelable table, compare the attribute information of the vehicle picture to be retrieved with the attribute information of the vehicle picture recorded in the vehiclelable table, determine the storage location of the vehicle picture and the collection time of the vehicle picture recorded in the vehiclelable table entry where the attribute information of the recorded vehicle picture matches the attribute information of the vehicle picture to be retrieved, as the storage location of the matched vehicle picture (hereinafter referred to as the storage location of the first vehicle picture) and the collection time of the vehicle picture (hereinafter referred to as the collection time of the first vehicle picture).
4) And the NVR acquires the first vehicle picture according to the storage position of the first vehicle picture.
In this embodiment, the NVR may read the first vehicle picture from the hard disk according to the storage location (position offset + length) of the first vehicle picture, so that the NVR may obtain the first vehicle picture and the acquisition time of the first vehicle picture.
4. Video summary playback
1) And for any first vehicle picture, acquiring a target video clip which is 5 seconds before the acquisition time of the first vehicle picture and 5 seconds after the alarm of the first vehicle picture.
In this embodiment, NVR may establish a VideoTable; wherein, the main fields in the VideoTable have: the video recording storage location (hard disk offset + length) and the start-stop time (start time and end time) of the video recording data.
When a completed video is stored in the hard disk, a new record (i.e. a new entry is added) is inserted into the VideoTable, and the storage location and the start-stop time of the video are recorded.
For any first vehicle picture, the NVR determines the 5 th second before the acquisition time of the first vehicle picture as the starting time of the target video recording segment, determines the 5 th second after the acquisition time of the first vehicle picture as the ending time of the target video recording segment, and queries the VideoTable table according to the starting time and the ending time of the first vehicle picture to obtain the target video recording segment.
2) And generating a video abstract according to each target video segment, and decoding and displaying the video abstract.
In the embodiment of the application, by acquiring and storing the vehicle picture, the acquisition time of the vehicle picture and the attribute information of the vehicle picture in the video data of the video source device, when the vehicle retrieval request is received, the first vehicle picture matched with the vehicle picture to be retrieved is determined according to the vehicle picture to be retrieved carried in the vehicle retrieval request, and then the video abstract is generated according to the first vehicle picture and the acquisition time of the first vehicle picture, and is played back, so that the condition that the matched vehicle picture needs to be extracted from the video data in each vehicle retrieval is avoided, the vehicle retrieval efficiency and the accuracy are improved, and the continuity of vehicle video tracking is ensured.
The methods provided herein are described above. The following describes the apparatus provided in the present application:
referring to fig. 5, a schematic structural diagram of a video summary playback apparatus provided in an embodiment of the present application is shown, where the video summary playback apparatus may be applied to a retrieval device in the foregoing embodiment, and as shown in fig. 5, the video summary playback apparatus may include:
the acquiring unit 510 is configured to acquire a vehicle picture, acquisition time of the vehicle picture, and attribute information of the vehicle picture in video data of a video source device;
the storage unit 520 is used for storing the vehicle picture, the acquisition time of the vehicle picture and the attribute information of the vehicle picture;
the retrieval unit 530 is configured to, when a vehicle retrieval request is received, determine a first vehicle picture matched with a vehicle picture to be retrieved according to the vehicle picture to be retrieved carried in the vehicle retrieval request;
the processing unit 540 is configured to generate a video summary according to the first vehicle picture and the acquisition time of the first vehicle picture, and play back the video summary.
In an optional implementation manner, the obtaining unit 510 is specifically configured to receive a vehicle picture sent by the video source device, a collection time of the vehicle picture, and attribute information of the vehicle picture.
In an optional implementation manner, the obtaining unit 510 is specifically configured to receive a vehicle picture sent by the video source device and a collection time of the vehicle picture; modeling is carried out on the vehicle picture, and attribute information of the vehicle picture is extracted.
In an optional implementation manner, the obtaining unit 510 is specifically configured to receive vehicle picture information, acquisition time of a vehicle picture, and first attribute information of the vehicle picture, which are sent by the video source device; modeling the vehicle picture, and extracting second attribute information of the vehicle picture; and determining the attribute information of the vehicle picture according to the first attribute information of the vehicle picture and the second attribute information of the vehicle picture.
In an optional implementation manner, the obtaining unit 510 is specifically configured to perform vehicle target detection on video data provided by the video source device to obtain a vehicle picture in the video data and a collection time of the vehicle picture; modeling is carried out on the vehicle picture, and attribute information of the vehicle picture is extracted.
In an optional embodiment, the storage unit 520 is specifically configured to store the vehicle picture; and recording the storage position of the vehicle picture, the acquisition time of the vehicle picture and the attribute information of the vehicle picture in a vehicle picture information table.
In an optional implementation manner, the obtaining unit 510 is further configured to model the vehicle picture to be retrieved, and extract attribute information of the vehicle picture to be retrieved;
the retrieving unit 530 is specifically configured to compare the attribute information of the to-be-retrieved vehicle picture with the attribute information of the vehicle picture recorded in the vehicle picture information table, so as to obtain a storage location of a first vehicle picture matched with the attribute information of the to-be-retrieved vehicle picture; and acquiring the first vehicle picture according to the storage position of the first vehicle picture.
In an optional implementation manner, the processing unit 540 is specifically configured to generate a video summary according to the first vehicle pictures sorted in the order from morning to evening according to time.
In an optional implementation manner, the processing unit 540 is specifically configured to determine, for any first vehicle picture, a target video segment corresponding to the first vehicle picture; the target video clip is video data between the nth second before the acquisition time of the first vehicle picture and the mth second after the acquisition time of the first vehicle picture; and generating a video abstract according to each target video clip.
In an optional implementation manner, the processing unit 540 is specifically configured to, when there are multiple first vehicle pictures with the same acquisition time, determine, for any first vehicle picture in the multiple first vehicle pictures, a start time point and an end time point of a video segment corresponding to the first vehicle picture; wherein the starting time point is the nth second before the acquisition time of the first vehicle picture, and the ending time point is the mth second after the acquisition time of the first vehicle picture; searching whether the video data of the video data channel to which the first vehicle picture belongs has the I frame of the starting time point and whether the I frame of the ending time exists; if the target video segment exists, discarding the rest first vehicle pictures in the plurality of first vehicle pictures, and determining the video segments corresponding to the first vehicle pictures as the target video segments; and generating a video abstract according to each target video clip.
In an optional implementation manner, the processing unit 540 is further specifically configured to, if there is no I frame of the start time point, increase the start time point of the video segment corresponding to the first vehicle picture by 1 second, and repeat the searching step until the I frame of the start time point is searched in the video data of the video data channel to which the first vehicle picture belongs, or the start time point and the end time point of the video segment corresponding to the first vehicle picture are the same; if the I frame of the ending time point does not exist, reducing the ending time point of the video segment corresponding to the first vehicle picture by 1 second, and repeating the searching step until the I frame of the ending time point is searched in the video data of the video data channel to which the first vehicle picture belongs, or the starting time point and the ending time point of the video segment corresponding to the first vehicle picture are the same; determining a first vehicle picture with the longest duration of the corresponding video segments in the plurality of first vehicle pictures, determining the video segment corresponding to the first vehicle picture as a target video segment, and discarding the rest first vehicle pictures in the plurality of first vehicle pictures; and generating a video abstract according to each target video clip.
Fig. 6 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the present disclosure. The electronic device may include a processor 601, a communication interface 602, a memory 603, and a communication bus 604. The processor 601, the communication interface 602, and the memory 603 communicate with each other via a communication bus 604. Wherein, the memory 603 is stored with a computer program; the processor 601 may perform the video summary playback method described above by executing the program stored on the memory 603.
The memory 603 referred to herein may be any electronic, magnetic, optical, or other physical storage device that can contain or store information such as executable instructions, data, and the like. For example, the memory 602 may be: a RAM (random Access Memory), a volatile Memory, a non-volatile Memory, a flash Memory, a storage drive (e.g., a hard drive), a solid state drive, any type of storage disk (e.g., an optical disk, a dvd, etc.), or similar storage medium, or a combination thereof.
Embodiments of the present application also provide a machine-readable storage medium, such as the memory 603 in fig. 6, storing a computer program, which can be executed by the processor 601 in the electronic device shown in fig. 6 to implement the video summary playback method described above.
It is noted that, herein, 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.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.
Claims (8)
1. A video summary playback method, comprising:
acquiring and storing a vehicle picture, the acquisition time of the vehicle picture and attribute information of the vehicle picture in video data of video source equipment;
when a vehicle retrieval request is received, determining a first vehicle picture matched with a vehicle picture to be retrieved according to the vehicle picture to be retrieved carried in the vehicle retrieval request;
generating a video abstract according to the first vehicle picture and the acquisition time of the first vehicle picture, and playing back the video abstract;
the method for acquiring the vehicle picture, the acquisition time of the vehicle picture and the attribute information of the vehicle picture in the video data of the video source device comprises the following steps:
receiving vehicle picture information, vehicle picture acquisition time and first attribute information of the vehicle picture sent by the video source device;
modeling the vehicle picture, and extracting second attribute information of the vehicle picture;
determining attribute information of the vehicle picture according to the first attribute information of the vehicle picture and the second attribute information of the vehicle picture;
for any vehicle picture, comparing first attribute information of the vehicle picture with second attribute information of the vehicle picture, and adding attribute information which exists in the first attribute information but does not exist in the second attribute information or attribute information which does not exist in the first attribute information but exists in the second attribute information into the attribute information of the vehicle picture; adding the attribute information in the second attribute information into the attribute information of the vehicle picture for the attribute information existing in both the first attribute information and the second attribute information;
wherein, the video abstract is generated according to the first vehicle picture and the acquisition time of the first vehicle picture, and the method comprises the following steps:
when the number of the first vehicle pictures retrieved by the retrieval device exceeds a preset number threshold value and the difference value of the acquisition time of the adjacent first vehicle pictures sequenced in the sequence from morning to evening does not exceed a preset time threshold value, generating a video abstract according to the first vehicle pictures sequenced in the sequence from morning to evening.
2. The method of claim 1, wherein storing the vehicle picture, the time of capturing the vehicle picture, and the attribute information of the vehicle picture in the video data of the video source device comprises:
storing the vehicle picture;
and recording the storage position of the vehicle picture, the acquisition time of the vehicle picture and the attribute information of the vehicle picture in a vehicle picture information table.
3. The method according to claim 2, wherein the determining, according to the to-be-retrieved vehicle picture carried in the vehicle retrieval request, a first vehicle picture matching the to-be-retrieved vehicle picture comprises:
modeling the vehicle picture to be retrieved, and extracting attribute information of the vehicle picture to be retrieved;
comparing the attribute information of the vehicle picture to be retrieved with the attribute information of the vehicle picture recorded in the vehicle picture information table to obtain a storage position of a first vehicle picture matched with the attribute information of the vehicle picture to be retrieved;
and acquiring the first vehicle picture according to the storage position of the first vehicle picture.
4. A video summary playback apparatus, comprising:
the acquisition unit is used for acquiring a vehicle picture, the acquisition time of the vehicle picture and the attribute information of the vehicle picture in the video data of the video source equipment;
the storage unit is used for storing the vehicle picture, the acquisition time of the vehicle picture and the attribute information of the vehicle picture;
the retrieval unit is used for determining a first vehicle picture matched with the vehicle picture to be retrieved according to the vehicle picture to be retrieved carried in the vehicle retrieval request when the vehicle retrieval request is received;
the processing unit is used for generating a video abstract according to the first vehicle picture and the acquisition time of the first vehicle picture and playing back the video abstract;
the acquiring unit is specifically configured to receive vehicle picture information, acquisition time of a vehicle picture and first attribute information of the vehicle picture, which are sent by the video source device; modeling the vehicle picture, and extracting second attribute information of the vehicle picture; determining attribute information of the vehicle picture according to the first attribute information of the vehicle picture and the second attribute information of the vehicle picture;
for any vehicle picture, comparing first attribute information of the vehicle picture with second attribute information of the vehicle picture, and adding attribute information which exists in the first attribute information but does not exist in the second attribute information or attribute information which does not exist in the first attribute information but exists in the second attribute information into the attribute information of the vehicle picture; adding the attribute information in the second attribute information into the attribute information of the vehicle picture for the attribute information existing in both the first attribute information and the second attribute information;
the processing unit is specifically configured to generate a video summary according to first vehicle pictures sorted in the sequence from morning to evening when the number of the first vehicle pictures retrieved by the retrieval device exceeds a preset number threshold and a difference value between acquisition times of adjacent first vehicle pictures sorted in the sequence from morning to evening does not exceed a preset time threshold.
5. The apparatus of claim 4,
the storage unit is specifically used for storing the vehicle picture; and recording the storage position of the vehicle picture, the acquisition time of the vehicle picture and the attribute information of the vehicle picture in a vehicle picture information table.
6. The apparatus of claim 4,
the acquisition unit is also used for modeling the vehicle picture to be retrieved and extracting the attribute information of the vehicle picture to be retrieved;
the retrieval unit is specifically configured to compare the attribute information of the to-be-retrieved vehicle picture with the attribute information of the vehicle picture recorded in the vehicle picture information table to obtain a storage location of a first vehicle picture matched with the attribute information of the to-be-retrieved vehicle picture; and acquiring the first vehicle picture according to the storage position of the first vehicle picture.
7. An electronic device is characterized by comprising a processor, a communication interface, a memory and a communication bus, wherein the processor and the communication interface are used for realizing mutual communication by the memory through the communication bus;
a memory for storing a computer program;
a processor for implementing the method steps of any one of claims 1 to 3 when executing a program stored in the memory.
8. A computer-readable storage medium, characterized in that a computer program is stored in the computer-readable storage medium, which computer program, when being executed by a processor, carries out the method steps of any one of claims 1-3.
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| PCT/CN2019/102073 WO2020048324A1 (en) | 2018-09-04 | 2019-08-22 | Video abstract generation method and apparatus, and electronic device and readable storage medium |
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| CN112700654A (en) * | 2020-12-21 | 2021-04-23 | 上海眼控科技股份有限公司 | Video processing method and device, electronic equipment and storage medium |
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