CN112541390A - Frame-extracting dynamic scheduling method and system for violation analysis of examination video - Google Patents
Frame-extracting dynamic scheduling method and system for violation analysis of examination video Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/40—Scenes; Scene-specific elements in video content
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- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
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- G06F9/546—Message passing systems or structures, e.g. queues
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/44—Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
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- 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
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/845—Structuring of content, e.g. decomposing content into time segments
- H04N21/8456—Structuring of content, e.g. decomposing content into time segments by decomposing the content in the time domain, e.g. in time segments
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Abstract
The invention discloses a frame-extracting dynamic scheduling method and a frame-extracting dynamic scheduling system for violation analysis of an examination video, wherein the frame-extracting dynamic scheduling method comprises the following steps: the system comprises a retrieval module, an image frame extraction module, an image storage module, a message notification module and a short video extraction module; the retrieval module retrieves the local disk and the external disk and sends the retrieved video file to the image frame extraction module; the image frame extracting module is used for extracting and decoding the received video file and sending the decoded video frame to the image storage module; the image storage module encodes the video frame and generates a picture file; the message notification module reports the received message to the short video extraction module; and the short video extracting module extracts the standard short video at the corresponding position of the file according to the video frame time and the sequence number. The invention adopts a hard decoding mode to decode the video frame, thereby accelerating the processing speed of the video file; and three frame extraction strategies are configured, so that the frame extraction strategy is supported to be updated at any time, and the rapid imaging of the video file is realized.
Description
Technical Field
The invention relates to the field of video analysis, in particular to a frame-extracting dynamic scheduling method and system for violation analysis of examination videos.
Background
With the popularization of intelligent products, videos become an information exchange mode commonly used in daily life, and various merchants and enterprises also intermittently invest in a lot of heart blood in the field of video analysis; the video frame extraction is used as an essential link in video analysis, and is very widely applied, and the application places comprise: the main working principle of the system is to extract a single image from a video by using an image frame extraction technology and feed the single image back to a user side. However, the conventional video frame extraction cannot update the frame extraction strategy at any time, often takes a long time to complete, has a low frame extraction rate, and cannot realize rapid imaging of a video file.
Disclosure of Invention
Based on this, the invention aims to solve the problem of low frame extraction rate caused by the fact that a new frame extraction strategy cannot be followed at any time in the prior art.
In order to achieve the above object, the present invention provides a frame-extracting dynamic scheduling method and system for violation analysis of examination video, wherein the frame-extracting dynamic scheduling service system for violation video comprises: the system comprises a retrieval module, an image frame extraction module, an image storage module, a message notification module and a short video extraction module;
the retrieval module is used for retrieving the local disk and the external disk, searching corresponding video files from the retrieved disks and sending the video files to the image frame extraction module;
the image frame extracting module comprises a frame extracting strategy submodule and an image frame extracting decoding submodule, receives the video file sent by the retrieval module, selects a corresponding frame extracting strategy through the frame extracting strategy submodule to carry out frame extracting and decoding on the video file, and sends the decoded video frame to the image storage module;
the image storage module receives the decoded video frame sent by the image frame extraction module, encodes the video frame to generate a picture file, and uploads the picture to the storage service module;
the message notification module is connected with the retrieval module, the image storage module and the short video extraction module and is responsible for reporting local disk messages, file messages and picture messages to the short video extraction module;
and the extraction short video module receives the information uploaded by the message notification module and extracts the standard short video at the corresponding position of the file according to the video frame time and the sequence number.
The retrieval module comprises: the device comprises a disk retrieval module and a file retrieval module.
The frame extraction strategy can be divided into three modes: a timing frame extraction mode, a key frame extraction mode and an interval frame extraction mode;
timing frame extraction mode: when extracting a video frame, designating the starting time and the ending time of a video file;
key frame decimation mode: extracting key frames with independent decoding capability in the video;
intermittent frame extraction mode: frames are decimated by a specified interval time or number of frames.
The video frames can be subjected to CPU decoding and GPU decoding according to different frame extraction modes.
The picture file generated by the image storage module can be in JPEG, PNG, BMP or other formats.
The standard short video extracted by the short video extraction module supports standard players such as H5 and VLC to play.
The frame-extracting dynamic scheduling system for the violation analysis of the examination video relates to the application of the following technologies: GPU decoding, kafka, S3 and H264 encoding.
The frame-extracting dynamic scheduling method for the violation analysis of the examination video further comprises the following steps of:
s1, a client worker issues a work instruction;
s2, the frame extracting service system receives the instruction, retrieves the local disk and the video file, reports the retrieved disk information and video file information to a message queue, starts frame extracting and decoding according to a default frame extracting strategy, stores the decoded picture, and finally sends the picture frame message to the message queue;
s3, updating the frame extraction strategy according to the specific scene;
s4, issuing an extracted short video message, extracting a short video, uploading to a storage, and returning an extraction result;
and S5, reporting the frame extraction progress states of the magnetic disc and the video file at regular time, and informing a client personnel to display the frame extraction results of the magnetic disc and the video file after the video finishes frame extraction so as to finish the file frame extraction process.
The beneficial effect of this application: the video frame decoding is carried out in a hard decoding mode, so that the video file processing speed is increased; three frame extraction strategies and various storage modes are configured, the capability of updating the frame extraction strategies and extracting short videos at any time is supported, the rapid imaging of video files is realized, and the frame extraction frequency and the uploading speed of pictures are dynamically controlled according to the storage capacity; and (4) positioning the storage position of the image physical file by combining the disk and the file information, and quickly tracing the source file address.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and for those skilled in the art, other drawings can be obtained according to the structures of the drawings without creative efforts.
FIG. 1 is a block diagram of a violation video frame-drawing dynamic scheduling service system;
FIG. 2 is a flow chart illustrating a system for dynamically scheduling frame extraction for illegal video;
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
As shown in fig. 1, in this embodiment, a frame-extracting dynamic scheduling method, a system, a terminal, and a storage medium for analysis of an exam video violation are provided, where the frame-extracting dynamic scheduling service system for the violation video violation analysis includes: the system comprises a retrieval module, an image frame extraction module, an image storage module, a message notification module and a short video extraction module;
the retrieval module is used for retrieving the local disk and the external disk, searching corresponding video files from the retrieved disks and sending the video files to the image frame extraction module;
the image frame extracting module receives the video file sent by the retrieval module, performs frame extraction and decoding on the video file, and sends the decoded video frame to the image storage module;
the image storage module receives the decoded video frame sent by the image frame extraction module, encodes the video frame to generate a picture file, and uploads the picture to the storage service module;
the message notification module is connected with the retrieval module, the image storage module and the short video extraction module and is responsible for reporting local disk messages, file messages and picture messages to the short video extraction module;
and the extraction short video module receives the information uploaded by the message notification module and extracts the standard short video at the corresponding position of the file according to the video frame time and the sequence number.
In this embodiment, the retrieving module includes: the device comprises a disk retrieval module and a file retrieval module.
In this embodiment, the image frame extracting module includes: the device comprises a frame extraction strategy module and an image frame extraction decoding module.
In this embodiment, the storage service module includes: the system comprises a cloud storage, distributed storage and general storage service module;
additionally, the general storage service includes: SMB, S3, FTP, etc.
In this embodiment, the frame extraction strategy can be divided into three modes: a timing frame extraction mode, a key frame extraction mode and an interval frame extraction mode;
timing frame extraction mode: starting to extract video frames at the moment of appointing a video file; when the video frame extraction is started, the file start time and the file end time are specified, the frame extraction video nodes are reduced, and the operation cost is saved;
key frame decimation mode: extracting key frames with independent decoding capability in the video;
intermittent frame extraction mode: frames are decimated by a specified interval time or number of frames.
In this embodiment, the video frame may be subjected to CPU decoding and GPU decoding according to different frame extraction modes.
In this embodiment, the picture file encoded and generated by the image storage module may be in JPEG, PNG, BMP, or the like format.
In this embodiment, the standard short video extracted by the extraction short video module supports standard player playing such as H5 and VLC.
As shown in fig. 2, in this embodiment, the frame-extracting dynamic scheduling system for analysis of an examination video violation further includes the following steps:
s1, a client worker issues a frame extraction starting message to a frame extraction service system;
s2, the frame extracting service system receives a message issued by a client worker, starts to retrieve a local disk and a video file, reports the retrieved disk information and video file information to a message queue, starts to extract and decode according to a default frame extracting strategy, uploads a decoded picture to cloud storage or distributed storage, and finally sends the picture frame message to the message queue;
and S3, updating the frame-drawing strategy according to the specific scene, and sending the message to the message queue. After receiving the message, the frame extracting service updates a frame extracting strategy;
s4, according to the requirement of the client personnel, sending the extracted short video message to a message queue, after receiving the message, extracting the short video and uploading to a storage, and returning the extraction result to the message queue;
and S5, the frame extracting service system reports the frame extracting progress states of the disk and the video file at regular time, when the video finishes frame extracting, the frame extracting service system informs a client personnel, and the frame extracting results of the disk and the video file are displayed on a page to finish the process of file frame extracting.
In this embodiment, the frame-extracting dynamic scheduling system for analysis of the violation of the examination video relates to application of the following technologies: GPU decoding, kafka, S3 and H264 encoding.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A frame-extracting dynamic scheduling system for analysis of violation of exam videos, wherein the frame-extracting dynamic scheduling service system for violation videos comprises: the system comprises a retrieval module, an image frame extraction module, an image storage module, a message notification module and a short video extraction module;
the retrieval module is used for retrieving the local disk and the external disk, searching corresponding video files from the retrieved disks and sending the video files to the image frame extraction module;
the image frame extracting module comprises a frame extracting strategy submodule and an image frame extracting decoding submodule, receives the video file sent by the retrieval module, selects a corresponding frame extracting strategy through the frame extracting strategy submodule to carry out frame extracting and decoding on the video file, and sends the decoded video frame to the image storage module;
the image storage module receives the decoded video frame sent by the image frame extraction module, encodes the video frame to generate a picture file, and uploads the picture to the storage service module;
the message notification module is connected with the retrieval module, the image storage module and the short video extraction module and is responsible for reporting local disk messages, file messages and picture messages to the short video extraction module;
and the extraction short video module receives the information uploaded by the message notification module and extracts the standard short video at the corresponding position of the file according to the video frame time and the sequence number.
2. The system of claim 1, wherein the retrieval module comprises: the device comprises a disk retrieval module and a file retrieval module.
3. The system according to claim 1, wherein the frame-extraction strategy can be divided into three modes: a timing frame extraction mode, a key frame extraction mode and an interval frame extraction mode;
timing frame extraction mode: when extracting a video frame, designating the starting time and the ending time of a video file;
key frame decimation mode: extracting key frames with independent decoding capability in the video;
intermittent frame extraction mode: frames are decimated by a specified interval time or number of frames.
4. The system of claim 1, wherein the video frames are CPU decoded and GPU decoded according to different framing modes.
5. The system according to claim 1, wherein the image file encoded by the image storage module is in a format selected from the group consisting of JPEG, PNG, BMP, etc.
6. The system according to claim 1, wherein the standard short video extracted by the short video extracting module supports standard player playback such as H5 and VLC.
7. The system for dynamically scheduling frame-extraction for analysis of exam video violations according to claim 1, wherein said system for dynamically scheduling frame-extraction for analysis of exam video violations involves application of the following techniques: GPU decoding, kafka, S3 and H264 encoding.
8. A frame-extracting dynamic scheduling method for violation analysis of examination videos is characterized by further comprising the following steps of:
s1, a client worker issues a work instruction;
s2, the frame extracting service system receives the instruction, retrieves the local disk and the video file, reports the retrieved disk information and video file information to a message queue, starts frame extracting and decoding according to a default frame extracting strategy, stores the decoded picture, and finally sends the picture frame message to the message queue;
s3, updating the frame extraction strategy according to the specific scene;
s4, issuing an extracted short video message, extracting a short video, uploading to a storage, and returning an extraction result;
and S5, reporting the frame extraction progress states of the magnetic disc and the video file at regular time, and informing a client personnel to display the frame extraction results of the magnetic disc and the video file after the video finishes frame extraction so as to finish the file frame extraction process.
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| CN114339299A (en) * | 2021-12-27 | 2022-04-12 | 司法鉴定科学研究院 | Video evidence obtaining method for automobile driving recorder |
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| 王镓;吴伟仁;李剑;邸凯昌;万文辉;谢剑锋;彭?;王保丰;刘斌;贾萌娜;席露华;赵瑞;: "基于视觉的嫦娥四号探测器着陆点定位" * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114339299A (en) * | 2021-12-27 | 2022-04-12 | 司法鉴定科学研究院 | Video evidence obtaining method for automobile driving recorder |
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