CN112541390B - Frame extraction dynamic scheduling method and system for examination video violation analysis - Google Patents
Frame extraction dynamic scheduling method and system for examination video violation analysis Download PDFInfo
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- 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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- H04N19/44—Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
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- 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
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Abstract
The invention discloses a frame extraction dynamic scheduling method and a system for examination video violation analysis, wherein the 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 frames and decoding the received video file and sending the decoded video frames to the image storage module; the image storage module encodes the video frames and generates a picture file; the message notification module reports the received message to the short video extraction module; and the short video extraction module extracts standard short videos at corresponding positions of the file according to the video frame time and the serial numbers. The invention adopts a hard decoding mode to decode the video frames, thereby accelerating the processing speed of video files; three frame extraction strategies are configured, so that the frame extraction strategy is supported to be updated at any time, and the video file is rapidly imaged.
Description
Technical Field
The invention relates to the field of video analysis, in particular to a frame extraction dynamic scheduling method and system for examination video violation analysis.
Background
Along with the popularization of intelligent products, videos form an information communication mode commonly used in our daily life, and various merchants and enterprises also intermittently input a plurality of hearts in the field of video analysis; the video frame extraction is used as an indispensable link in video analysis, the application is very wide, and the application places comprise: the main working principle of the method is that a single image is extracted from a video by utilizing an image frame extraction technology and fed back to a user side. However, the traditional video frame extraction cannot update the frame extraction strategy at any time, often takes a long time to complete, the frame extraction rate is low, and the video file cannot be rapidly imaged.
Disclosure of Invention
Based on the above, the invention aims to solve the problem of low frame extraction rate caused by the fact that the new frame extraction strategy cannot be followed at any time in the prior art.
In order to achieve the above purpose, the present invention provides a frame extraction dynamic scheduling method and system for analysis of exam video violations, wherein the system for service of illegal video frame extraction dynamic scheduling 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 searching module is used for searching the local disk and the external disk, searching corresponding video files from the searched disks and sending the video files to the image frame extraction module;
the image frame extraction module comprises a frame extraction strategy sub-module and an image frame extraction decoding sub-module, receives the video file sent by the retrieval module, selects a corresponding frame extraction strategy through the frame extraction strategy sub-module to extract and decode 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 decoded 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 extraction video module and is responsible for reporting the local disk message, the file message and the picture message to the short extraction video module;
and the short video extraction module receives the information uploaded by the message notification module, and extracts standard short videos at the corresponding positions of the files according to the video frame time and the sequence numbers.
The retrieval module comprises: the system 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 a spacing frame extraction mode;
timing frame extraction mode: when extracting video frames, designating the starting time and the ending time of the video file;
key frame extraction mode: extracting key frames with independent decoding capability from the video;
intermittent frame extraction mode: frames are decimated by a specified interval time or frame number.
The video frames may be CPU decoded and GPU decoded according to different frame-taking modes.
The image file generated by encoding by the image storage module can be JPEG, PNG, BMP and other formats.
And the standard short video extracted by the short video extraction module supports the standard players such as H5, VLC and the like to play.
The frame extraction dynamic scheduling system for analyzing the exam video violations relates to the application of the following technology: GPU decoding, kafka, S3, H264 encoding.
The frame extraction dynamic scheduling method for the examination video violation analysis further comprises the following steps:
s1, a client worker issues a working instruction;
s2, the frame extraction service system receives the instruction, retrieves a local disk and a video file, reports the retrieved disk information and video file information to a message queue, starts frame extraction and decoding according to a default frame extraction strategy, stores decoded pictures, and finally sends picture frame information to the message queue;
s3, updating a frame extraction strategy according to a specific scene;
s4, sending short video extraction information, extracting short videos, uploading the short videos to storage, and returning extraction results;
s5, the states of the frame extraction progress of the disk and the video file are reported at regular time, after the frame extraction of the video is completed, client personnel are notified, the frame extraction results of the disk and the video file are displayed, and the frame extraction flow of the file is completed.
The beneficial effects of this application: the video frame is decoded in a hard decoding mode, so that the video file processing speed is increased; three frame extraction strategies and multiple storage modes are configured, the frame extraction strategies and the short video extraction capacity are supported to be updated at any time, the rapid imaging of video files is realized, and the frame extraction frequency and the picture uploading speed are dynamically controlled according to the storage capacity; and combining the disk and file information, positioning the storage position of the physical file of the image, and quickly tracing the address of the source file.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described, and it is possible for a person skilled in the art to obtain other drawings according to the structure of the drawings without inventive effort.
FIG. 1 is a diagram of a dynamic scheduling service system module for offending video frames;
FIG. 2 is a flow diagram of an offending video frame extraction dynamic scheduling service system;
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
For a clearer understanding of technical features, objects, and effects of the present invention, a specific embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1, in this embodiment, a frame-extracting dynamic scheduling method, system, terminal and storage medium for analysis of rule-breaking of examination video, where the rule-breaking video frame-extracting dynamic scheduling service system 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 searching module is used for searching the local disk and the external disk, searching corresponding video files from the searched disks and sending the video files to the image frame extraction module;
the image frame extracting module receives the video file sent by the searching module, extracts frames and decodes 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 decoded 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 extraction video module and is responsible for reporting the local disk message, the file message and the picture message to the short extraction video module;
and the short video extraction module receives the information uploaded by the message notification module, and extracts standard short videos at the corresponding positions of the files according to the video frame time and the sequence numbers.
In this embodiment, the search module includes: the system comprises a disk retrieval module and a file retrieval module.
In this embodiment, the image frame extraction module includes: and the frame extraction strategy module and the image frame extraction decoding module.
In this embodiment, the storage service module includes: cloud storage, distributed storage and general storage service modules;
additionally, the general storage service includes: SMB, S3, FTP, etc.
In this embodiment, the frame extraction policy may be divided into three modes: a timing frame extraction mode, a key frame extraction mode and a spacing frame extraction mode;
timing frame extraction mode: starting to extract video frames at the moment of designating the video file; when the video frames are extracted, the starting time and the ending time of the file are designated, so that the frame extracting video nodes are reduced, and the running cost is saved;
key frame extraction mode: extracting key frames with independent decoding capability from the video;
intermittent frame extraction mode: frames are decimated by a specified interval time or frame number.
In this embodiment, the video frames may be CPU decoded and GPU decoded according to different frame-extraction modes.
In this embodiment, the image file generated by the image storage module may be JPEG, PNG, BMP or the like.
In this embodiment, the standard short video extracted by the short video extracting module supports standard players such as H5 and VLC to play.
As shown in fig. 2, in this embodiment, the frame-extracting dynamic scheduling system for analyzing the rule violation of the examination video further includes the following steps:
s1, a client worker transmits a message for starting frame extraction to a frame extraction service system;
s2, the frame extraction service system receives the information issued by the client staff, starts to search the local disk and the video file, reports the searched disk information and video file information to the message queue, starts frame extraction and decoding according to a default frame extraction strategy, then uploads the decoded picture to cloud storage or distributed storage, and finally sends the picture frame information to the message queue;
and S3, updating a frame extraction strategy according to a specific scene, and sending the message to a message queue. After receiving the message, the frame extraction service updates the frame extraction strategy;
s4, according to the requirements of the client personnel, sending short video message extraction to a message queue, after receiving the message, the frame extraction service extracts the short video, uploads the short video to storage, and returns the extraction result to the message queue;
and S5, the frame extraction service system reports the frame extraction progress states of the disk and the video file at regular time, and after the video finishes frame extraction, the client personnel are notified, and the frame extraction results of the disk and the video file are displayed on the page to finish the file frame extraction process.
In this embodiment, the frame extraction dynamic scheduling system for analysis of examination video violations relates to application of the following technologies: GPU decoding, kafka, S3, H264 encoding.
The foregoing is merely a preferred embodiment of the invention, and it is to be understood that the invention is not limited to the form disclosed herein but is not to be construed as excluding other embodiments, but is capable of numerous other combinations, modifications and environments and is capable of modifications within the scope of the inventive concept, either as taught or as a matter of routine skill or knowledge in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the invention are intended to be within the scope of the appended claims.
Claims (3)
1. A frame-extracting dynamic scheduling system for analysis of exam video violations, characterized in that the violating video frame-extracting dynamic scheduling service system comprises: the system comprises a retrieval module, an image frame extraction module, an image storage module, a storage service module, a message notification module and a short video extraction module;
the searching module is used for searching the local disk and the external disk, searching corresponding video files from the searched disks and sending the video files to the image frame extraction module, and the searching module comprises: a disk retrieval module and a file retrieval module;
the image frame extraction module comprises a frame extraction strategy sub-module and an image frame extraction decoding sub-module, receives the video file sent by the retrieval module, selects a corresponding frame extraction strategy through the frame extraction strategy sub-module to extract and decode the video file, and sends the decoded video frame to the image storage module;
the frame extraction strategy is divided into three modes: a timing frame extraction mode, a key frame extraction mode and a spacing frame extraction mode;
timing frame extraction mode: when extracting video frames, designating the starting time and the ending time of the video file; the video frames can be subjected to CPU decoding and GPU decoding according to different frame extraction modes;
key frame extraction mode: extracting key frames with independent decoding capability from the video;
intermittent frame extraction mode: drawing frames according to the appointed interval time or frame number;
the image storage module receives the decoded video frame sent by the image frame extraction module, encodes the decoded video frame to generate a picture file, and uploads the picture to the storage service module; the image file generated by the image storage module through encoding is in JPEG or PNG or BMP format;
the message notification module is connected with the retrieval module, the image storage module and the short extraction video module and is responsible for reporting the local disk message, the file message and the picture message to the short extraction video module;
the short video extraction module receives the information uploaded by the information notification module, and extracts standard short videos at the corresponding positions of the files according to the video frame time and the sequence numbers; and the standard short video extracted by the short video extraction module supports the playing of H5 and VLC standard players.
2. The frame-taking dynamic scheduling system for analysis of exam video violations according to claim 1, wherein the frame-taking dynamic scheduling system for analysis of exam video violations involves application of the following techniques: GPU decoding, kafka, S3, H264 encoding.
3. The frame extraction dynamic scheduling method for the examination video violation analysis is characterized by further comprising the following steps of:
s1, a client worker issues a working instruction;
s2, the frame extraction service system receives the instruction, retrieves a local disk and a video file, reports the retrieved disk information and video file information to a message queue, starts frame extraction and decoding according to a default frame extraction strategy, stores decoded pictures, and finally sends picture frame information to the message queue;
s3, updating a frame extraction strategy according to a specific scene, wherein the frame extraction strategy is divided into three modes: timing frame extraction mode, key frame extraction mode and interval frame extraction mode: a timing frame extraction mode, wherein the video frame is extracted from the moment of the appointed video file;
a key frame extraction mode for extracting key frames with independent decoding capability from the video;
an interval frame extraction mode for extracting frames according to a specified interval time or frame number;
s4, sending short video extraction information, extracting short videos, uploading the short videos to storage, and returning extraction results;
s5, the states of the frame extraction progress of the disk and the video file are reported at regular time, after the frame extraction of the video is completed, client personnel are notified, the frame extraction results of the disk and the video file are displayed, and the frame extraction flow of the file is completed.
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