CN104683810A - Dynamic decoding method and device based on characteristic analysis - Google Patents
Dynamic decoding method and device based on characteristic analysis Download PDFInfo
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Abstract
The invention relates to the technical field of video encoding/decoding, and provides a dynamic decoding method based on characteristic analysis. The dynamic decoding method comprises the following steps: scanning the format content of a video file, and analyzing so as to obtain the types of a video encoding substructure to which the video file belongs, wherein the types of the video decoding substructure comprise a standard video decoding substructure, a universal video decoding substructure and a special private manufacturer video decoding substructure; decoding in a video decoding mode corresponding to the types of the video decoding substructure. By adopting the dynamic decoding method, various social resource formats of standard video files of industrial fields such as multimedia and video monitoring recording files of the video monitoring field can be widely compatible. Based on the dynamic decoding method, a universal file player can be rapidly established, or a development packet can be rapidly decoded, and labor and workload necessary for system expansion can be greatly alleviated.
Description
[technical field]
The present invention relates to video coding and decoding technology field, particularly relate to the dynamic decoder method and apparatus that a kind of feature based is analyzed.
[background technology]
It is the industrial circle Plays video formats such as cinemusic amusement that video file classification mainly contains two kinds: one class, such as AVI, TS, MPG, MKV, RMVB, FLV etc., universal player windows media player can be used, KMPLYER, QQ is audio-visual, the broadcastings such as MPC, one class is the video format of privately owned producer, mainly some producer's forms in field of video monitoring, such as Haikang, large China, there is oneself privately owned form in Han Bangdeng producer, the main flow players such as storm wind cannot be play, producer can only be used to carry player and decoder carry out decoding and play.Domestic do not have a kind of unified player and decoding technique at present, can realize the compatible processing to all video formats, for a lot of form, be all need install separately decoder or need independent player, check very inconvenient, also cannot externally provide decoding interface to carry out secondary development.
Domestic patent " a kind of monitoring video file universal playing system and method " (application publication number CN102404556A, Shen Qing Publication day 2012.04.04) provide a kind of universal playing method of surveillance video file, the inside has a general thinking to describe about file decoding part, but just for the file format of field of video monitoring, do not illustrate about normal video lattice part, coverage rate is inadequate, in addition method too roughening, main points of view parses affiliated manufacturer according to file header and file suffixes, decoded by video producer solution numeral device, but actual conditions are often the information that inside some video format file headers or suffix, basic identification does not go out any form and manufacturer aspect, cannot make to decode in this way, and for identifying the form of manufacturer, because privately owned encapsulation format is numerous, there is producer not necessarily has decoder to provide, have decoder to differ to open file surely, each form needs to add separately a sub-means expansion difficulty and needs the problems such as a large amount of manpower and materials.
[summary of the invention]
The technical problem to be solved in the present invention is the form for identifying manufacturer, because privately owned encapsulation format is numerous, there is producer and not necessarily have decoder to provide, have decoder to differ to open file surely, each form needs to add separately a sub-means expansion difficulty needs the problems such as a large amount of manpower and materials.
In order to solve the problem, one aspect of the present invention provides a kind of dynamic decoder method that feature based is analyzed, and comprising:
By the scanning to video file format content, resolve the video decode minor structure type obtained belonging to described video file; Wherein said video decode minor structure type comprises standard video decoding minor structure, generic video decoding minor structure and special privately owned manufacturer video decode minor structure; The video decode mode corresponding with described video decode minor structure type is used to decode.
Preferably, described by the scanning to video file, resolve the type of coding obtained belonging to described video file, specifically comprise:
Use based on decoder scanning of increasing income, based on standard code signature scan and the mode based on privately owned vendor characteristic code scanning, arrange from high to low according to priority; The type of described video decode minor structure is determined by the scanning result that its medium priority is higher.
Preferably, described based on decoder scanning of increasing income, based on standard code signature scan or the mode based on privately owned vendor characteristic code scanning, specifically comprise: by scanning document head data, suffix and a certain amount of file content own, identify container and the type of coding of video file, or affiliated manufacturer, classifies to video decode minor structure.
Preferably, the described use video decode mode corresponding with described type of coding is decoded, and wherein, for the video file of standard video decoding minor structure type, specifically comprises: use decoding class libraries of increasing income to carry out file reading and decoding.
Preferably, described use increase income decoding class libraries carry out file reading and decoding, specifically comprise:
Initialization is increased income decoding class libraries related data structures; Increase income class libraries related data structures and interface of use opens video file, searches Video stream information, opens corresponding Video Decoder; Increase income class libraries related data structures and interface of use reads video file one content frame; This content frame is passed to class libraries decoder of increasing income to decode.
Preferably, the described use video decode mode corresponding with described type of coding is decoded, and wherein, for the video file of general decoding minor structure type, specifically comprises:
Set up frame index according to standard code condition code, utilize index to read frame voluntarily, and pass to decoder of increasing income and decode.
Preferably, describedly set up frame index according to standard code condition code, utilize index to read frame voluntarily, and pass to decoder of increasing income and decode, specifically comprise:
According to standard code condition code, set up file frame index, described file frame index comprises frame shifting amount and frame sign information; According to standard code condition code, decoding class libraries of increasing income is utilized to open corresponding decoder; Utilize the file index structure established, read this file one frame data; This content frame is passed to decoder decode.
Preferably, the described use video decode mode corresponding with described type of coding is decoded, and wherein, for special privately owned manufacturer video decode minor structure, specifically comprises: utilize manufacturer to provide decoding class libraries to carry out file reading and decoding.
The present invention on the other hand, provides the dynamic decoder device that a kind of feature based is analyzed, comprises storage device, processing unit and display unit, concrete:
Described storage device, for storing various video decode storehouse, comprises the video decode storehouse of the video decode storehouse of standard, general video decode storehouse and special privately owned manufacturer; Described processing unit, for by the scanning to video file format content, resolves the video decode minor structure type obtained belonging to described video file; Wherein said video decode minor structure type comprises standard video decoding minor structure, generic video decoding minor structure and special privately owned manufacturer video decode minor structure; The video decode mode corresponding with described video decode minor structure type is used to decode; Described display unit, for showing decoded video content.
Compared with prior art, beneficial effect of the present invention is: the inventive method can the various social resources form such as surveillance video file in the industrial circle Plays video file such as extensive compatible multimedia and field of video monitoring.Based on the method can rapid build general file player or decoding kit, required staff and workload during very big simplified system expansion, video content or field of video monitoring developer carry out the more top application and development based on decode video data to facilitate the personnel such as public security to check fast.
[accompanying drawing explanation]
Fig. 1 is the flow chart of the dynamic decoder method of a kind of feature based analysis that the embodiment of the present invention provides;
Fig. 2 is the flow chart of the dynamic decoder method of a kind of feature based analysis that the embodiment of the present invention provides;
Fig. 3 is the flow chart of the dynamic decoder method of a kind of feature based analysis that the embodiment of the present invention provides;
Fig. 4 is the structural representation of the dynamic decoder device of a kind of feature based analysis that the embodiment of the present invention provides;
Fig. 5 is the flow chart of the dynamic decoder method of a kind of feature based analysis that the embodiment of the present invention provides.
[embodiment]
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
In addition, if below in described each execution mode of the present invention involved technical characteristic do not form conflict each other and just can mutually combine.
embodiment 1:
The embodiment of the present invention 1 provides a kind of dynamic decoder method that feature based is analyzed, and as shown in Figure 1, comprising:
In step 201, by the scanning to video file format content, resolve the video decode minor structure type obtained belonging to described video file.
Wherein, described video decode minor structure type comprises standard video decoding minor structure, generic video decoding minor structure and special privately owned manufacturer video decode minor structure.
In step 202., the video decode mode corresponding with described video decode minor structure type is used to decode.
The inventive method can the various social resources form such as surveillance video file in the industrial circle Plays video file such as extensive compatible multimedia and field of video monitoring.Based on the method can rapid build general file player or decoding kit, required staff and workload during very big simplified system expansion, video content or field of video monitoring developer carry out the more top application and development based on decode video data to facilitate the personnel such as public security to check fast.
In conjunction with the present embodiment, described by the scanning to video file, resolve the type of coding obtained belonging to described video file, there is a kind of feasible scheme, specifically comprise:
Use based on decoder scanning of increasing income, based on standard code signature scan and the mode based on privately owned vendor characteristic code scanning, arrange from high to low according to priority; The type of described video decode minor structure is determined by the scanning result that its medium priority is higher.
Wherein, described based on decoder scanning of increasing income, based on standard code signature scan or the mode based on the scanning of privately owned vendor characteristic code, specifically can be implemented as:
By scanning document head data, suffix and a certain amount of file content own, identify container and the type of coding of video file, or affiliated manufacturer, video decode minor structure is classified.
In the present embodiment, the described use video decode mode corresponding with described type of coding is decoded, for the video file of the video file of standard video decoding minor structure type, the video file of general decoding minor structure type and special privately owned manufacturer video decode minor structure type, comprise following three kinds of decoding processes respectively:
For the video file of standard video decoding minor structure type, decoding class libraries of increasing income is used to carry out file reading and decoding.
For the video file of general decoding minor structure type, set up frame index according to standard code condition code, utilize index to read frame voluntarily, and pass to decoder of increasing income and decode.
For the video file of special privately owned manufacturer video decode minor structure type, manufacturer is utilized to provide decoding class libraries to carry out file reading and decoding.
embodiment 2:
The embodiment of the present invention 2 carries out file reading and decoding for using decoding class libraries of increasing income described in embodiment 1, provides concrete performing step, as shown in Figure 2, comprising:
In step 301, initialization is increased income decoding class libraries related data structures.
In step 302, use increase income class libraries related data structures and interface to open video file, search Video stream information, open corresponding Video Decoder.
In step 303, increase income class libraries related data structures and interface reading video file one content frame is used.
In step 304, this content frame is passed to class libraries decoder of increasing income to decode.
embodiment 3:
The embodiment of the present invention 2 sets up frame index for described in embodiment 1 according to standard code condition code, utilizes index to read frame voluntarily, and passes to decoder of increasing income and decode, and provides concrete performing step, as shown in Figure 3, comprising:
In step 401, according to standard code condition code, set up file frame index, described file frame index comprises frame shifting amount and frame sign information.
In step 402, according to standard code condition code, decoding class libraries of increasing income is utilized to open corresponding decoder.
In step 403, utilize the file index structure established, read this file one frame data.
In step 404, this content frame is passed to decoder to decode.
embodiment 4:
The embodiment of the present invention 4 provides the dynamic decoder device 1 that a kind of feature based is analyzed, and for realizing the method in embodiment 1,2 and 3, as shown in Figure 4, described dynamic decoder device comprises storage device 11, processing unit 12 and display unit 13, concrete:
Described storage device 11, for storing various video decode storehouse, comprises the video decode storehouse of the video decode storehouse of standard, general video decode storehouse and special privately owned manufacturer;
Described processing unit 12, for by the scanning to video file format content, resolves the video decode minor structure type obtained belonging to described video file; Wherein said video decode minor structure type comprises standard video decoding minor structure, generic video decoding minor structure and special privately owned manufacturer video decode minor structure; The video decode mode corresponding with described video decode minor structure type is used to decode;
Described display unit 13, for showing decoded video content.
What deserves to be explained is, the content such as information interaction, implementation between said apparatus and intrasystem module, unit, due to processing method embodiment of the present invention based on same design, particular content can see in the inventive method embodiment describe, repeat no more herein.
embodiment 5:
The embodiment of the present invention 5 provides the dynamic decoder method of a kind of feature based analysis, and the implementation procedure under actual application environment, specifically comprises:
In step 501, video file format is resolved.
Concrete, by scanning document head data, suffix and a certain amount of file content own, identify container and the type of coding of video file, or affiliated manufacturer, video format file type is classified.
This structure performs following process:
Steps A: file type A is initialized as UNKNOWN TYPE, then Streaming Media process storehouse tool scans input video file of increasing income is used, if can identify, file type A is labeled as standard video decoding subtype (Streaming Media storehouse of increasing income can support general be standard video format), after scanned, enter step B;
Step B: file type B is initialized as UNKNOWN TYPE, gather all privately owned form manufacturers format character code, read video file header contents to carry out mating one by one with the set of vendor characteristic code, if the match is successful, file type B is labeled as this special privately owned decoding subtype, then carries out step C;
Step C: file type C is initialized as UNKNOWN TYPE, gathers general coding type condition code, reads the byte of video file some, this condition code is searched for inside reading of content, if search for successfully, file type C is labeled as general decoding subtype, then enters step 502;
In step 502, carry out analysis to file type to judge.When judged result is standard video decoding minor structure, enter step 503; When judged result is generic video decoding minor structure, enter step 504; When judged result is special privately owned manufacturer's video decode minor structure, enter step 505.
Determination methods is as follows:
If <I> file type A is standard video decoding subtype, normal play can be carried out to video file with main flow player such as MPC, VLC etc. simultaneously, there is no the phenomenons such as Hua Ping, the final type of this file is set to standard video decoding subtype, is dropped in standard video decoding minor structure by file simultaneously and decodes;
If <II> file type A is standard video decoding subtype, use main flow player such as MPC simultaneously, VLC etc. can not carry out normal play to video file, there are the phenomenons such as colored screen half screenshotss, illustrate that this file type of coding is standard video coder, but content frame is carried out people for blocking or processing by manufacturer, belong to special privately owned manufacturer Format Type, now check the value of file type B, if just there is the corresponding manufacturer of coupling, definitive document type gets the value of file type B, file is dropped in special privately owned manufacturer video decode minor structure simultaneously and decodes, otherwise be expressed as the decoded file type do not supported,
If the value of <III> file type A is UNKNOWN TYPE, the value of file type B is special privately owned decoding subtype, the value of file type C is UNKNOWN TYPE, is dropped into by file in special privately owned manufacturer video decode minor structure and decodes;
If the value of <IV> file type A is UNKNOWN TYPE, the value of file type B is UNKNOWN TYPE, and the value of file type C is general decoding subtype, is dropped into by file in general decoding minor structure and decodes;
If the value of <V> file type A is UNKNOWN TYPE, the value of file type B is special privately owned decoding subtype, the value of file type C is general decoding subtype, use the main flows such as MPC to play instrument to play file, if can play successfully, definitive document type is set to general decoding subtype, file is dropped in working solution numeral device and decodes, otherwise be set to special privately owned decoding subtype, file be dropped in special privately owned solution numeral and decode.
The sorting algorithm of above-mentioned feature based analysis is core in whole document analysis structure.Situation (I) utilizes decoding tool one decoding minor structure of increasing income to enumerate whole standard video formats, universal coding part abstract in numerous privately owned manufacturer Format Types is that (the download video recording of the numerous DVR manufacturer of such as field of video monitoring is all h264 coding to a coding type by situation (V), but there is the encapsulation format of oneself uniqueness), avoid the heavy labor of going exploitation one decoding minor structure separately for each privately owned file type, only there is something special (II) and situation (III) when last resort, just use independent special privately owned manufacturer video decode minor structure.Situation (IV) then covers those and fails to identify manufacturer's form, and Open-Source Tools can scan out yet but actual coding is the video format of type.This sorting algorithm ensure that the widest coverage rate to video format, minimizes the number of video decode minor structure simultaneously.
In step 503, the decoding of standard video decoding minor structure is carried out.
For the Streaming Media process class libraries ffmpeg that increases income, described step 503 specifically performs and is: the encoder that locating file is corresponding in ffmepg, and opens decoder; Use ffmepg file reading one frame data; These frame data are delivered to decoder decode.
In step 504, the decoding of generic video decoding minor structure is carried out.
Such as, in step C, have read a part of file data, search criterion coding characteristic code in reading data, confirm as the condition code of h264 coding (such as: 00 00 00 01 67 or 00 00 00 01 27).
Now, step 504 specifically performs and is: utilize h264 condition code 00 00 00 01 to set up file frame index, comprise the information such as side-play amount, size of all H264 frames (NAL); Open the h264 decoder in ffmepg; The file frame index utilizing step to set up reads frame data; These frame data are delivered to described h264 decoder to decode.
In step 505, the decoding of special privately owned manufacturer video decode minor structure is carried out.
Such as, complete in stepb: file reading head part byte, contrast one by one with all privately owned producers condition codes, coupling manufacturer Haikang
Then described step 505, concrete execution is: carry out opening file and decode operation according to the decoder module explanation that Haikang provides.
Comparing consideration in embodiment 1 privately owned manufacturer's decoding storehouse needs by web download situation, before the scanning priority of minor structure of therefore being decoded by generic video has been placed on privately owned manufacturer video decode minor structure.The present embodiment be then think that this locality stores sufficient privately owned manufacturer's decoding storehouse basis on realize, therefore, before the priority of described privately owned manufacturer video decode minor structure being positioned over described generic video decoding minor structure.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of embodiment is that the hardware that can carry out instruction relevant by program has come, this program can be stored in a computer-readable recording medium, storage medium can comprise: read-only memory (ROM, Read Only Memory), random access memory (RAM, Random Access Memory), disk or CD etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a dynamic decoder method for feature based analysis, is characterized in that, comprising:
By the scanning to video file format content, resolve the video decode minor structure type obtained belonging to described video file;
Wherein said video decode minor structure type comprises standard video decoding minor structure, generic video decoding minor structure and special privately owned manufacturer video decode minor structure;
The video decode mode corresponding with described video decode minor structure type is used to decode.
2. method according to claim 1, is characterized in that, described by the scanning to video file, resolves the type of coding obtained belonging to described video file, specifically comprises:
Use based on decoder scanning of increasing income, based on standard code signature scan and the mode based on privately owned vendor characteristic code scanning, arrange from high to low according to priority;
The type of described video decode minor structure is determined by the scanning result that its medium priority is higher.
3. method according to claim 2, is characterized in that, described based on decoder scanning of increasing income, based on standard code signature scan or the mode based on the scanning of privately owned vendor characteristic code, specifically comprise:
By scanning document head data, suffix and a certain amount of file content own, identify container and the type of coding of video file, or affiliated manufacturer, video decode minor structure is classified.
4. according to the method in claim 2 or 3, it is characterized in that, the described use video decode mode corresponding with described type of coding is decoded, and wherein, for the video file of standard video decoding minor structure type, specifically comprises:
Use increase income decoding class libraries carry out file reading and decoding.
5. method according to claim 4, is characterized in that, described use increase income decoding class libraries carry out file reading and decoding, specifically comprise:
Initialization is increased income decoding class libraries related data structures;
Increase income class libraries related data structures and interface of use opens video file, searches Video stream information, opens corresponding Video Decoder;
Increase income class libraries related data structures and interface of use reads video file one content frame;
This content frame is passed to class libraries decoder of increasing income to decode.
6. according to the method in claim 2 or 3, it is characterized in that, the described use video decode mode corresponding with described type of coding is decoded, and wherein, for the video file of general decoding minor structure type, specifically comprises:
Set up frame index according to standard code condition code, utilize index to read frame voluntarily, and pass to decoder of increasing income and decode.
7. method according to claim 6, is characterized in that, describedly sets up frame index according to standard code condition code, utilizes index to read frame voluntarily, and passes to decoder of increasing income and decode, and specifically comprises:
According to standard code condition code, set up file frame index, described file frame index comprises frame shifting amount and frame sign information;
According to standard code condition code, decoding class libraries of increasing income is utilized to open corresponding decoder;
Utilize the file index structure established, read this file one frame data;
This content frame is passed to decoder decode.
8. according to the method in claim 2 or 3, it is characterized in that, the described use video decode mode corresponding with described type of coding is decoded, and wherein, for special privately owned manufacturer video decode minor structure, specifically comprises:
Manufacturer is utilized to provide decoding class libraries to carry out file reading and decoding.
9. a dynamic decoder device for feature based analysis, is characterized in that, comprise storage device, processing unit and display unit, concrete:
Described storage device, for storing various video decode storehouse, comprises the video decode storehouse of the video decode storehouse of standard, general video decode storehouse and special privately owned manufacturer;
Described processing unit, for by the scanning to video file format content, resolves the video decode minor structure type obtained belonging to described video file; Wherein said video decode minor structure type comprises standard video decoding minor structure, generic video decoding minor structure and special privately owned manufacturer video decode minor structure; The video decode mode corresponding with described video decode minor structure type is used to decode;
Described display unit, for showing decoded video content.
10. device according to claim 9, is characterized in that, described processing unit also for,
Realize as arbitrary in claim 2-8 as described in method.
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| CN104683810B (en) | 2019-09-06 |
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