CN102081947A - Management control method of video and audio file on embedded multimedia system - Google Patents
Management control method of video and audio file on embedded multimedia system Download PDFInfo
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Abstract
The invention discloses a management control method of a video and audio file on an embedded multimedia system, comprising the following steps: 1) distributing a structure for each subsection of a hard disk to represent the information of file management under each subsection; 2) when the file is stored, requiring to obtain the current system time to serve as storage time for naming the file in each corresponding folder; 3) building a date folder under the stored subsection; 4) building a hour folder under the stored date folder; 5) naming by stored minutes and seconds at present, building a minute and second storage file under the stored hour folder, wherein the minute and second storage file comprises an audio file and a video file; and respectively storing audio data and video data for the audio file and the video file by the storage system. The management control method can effectively lighten volume pressure for intensive storage, is convenient to play back and look up, and realizes unified data management.
Description
Technical field
The present invention relates to Network Video Surveillance technology, safety-security area, especially the management control method of audio-video document on embedded multimedia system.
Background technology
In recent years, along with the fast development of information network technique, manage concentratedly and control, be that the networked video monitoring system of front end begins to obtain widespread deployment with network video server and web camera (IPCAM) by central service platform.As the embedded storage system of the important component part of networked video monitoring system, its purposes is the audio, video data that receives and storage front-end collection system transmits.Direct mode of carrying out codec+storage at the front end of system, not only can alleviate the capacity pressure that centralized stores is brought, the network traffics pressure that centralized stores is brought can also be effectively alleviated, centralized stores the losing of image when network breaks down can be avoided simultaneously.As a kind of core of digital monitoring equipment, the audio, video data of storage is used for work such as site playback and investigation and evidence collection.
Should how store and manage this embedded storage system effectively so?
Obviously, with all audio frequency or video data, being stored in the single file, is unpractical.On the one hand, this single file As time goes on can be increasing, brings a lot of inconvenience to site playback, is difficult to locate apace the audio frequency or the video data of required time section; On the other hand, it also is subject to the restriction of FAT32 file system (hard disk adopts FAT32 form subregion) to the maximum 4G capacity of single file.So, need audio, video data continuous in time is divided into a plurality of files and stores.For example with audio frequency or video data, be saved as a file in per 3 minutes.So, before needing to search, during the audio or video data in a certain moment,, just can navigate to that required moment soon as long as find corresponding that file afterwards.And, if pass through other external interfaces (such as USB interface or network interface) of system, when the required document copying in this hard disk is arrived other storage mediums, also can be very convenient.
Yet in actual moving process, when the video data of voice data and encoding compression endlessly stores in the process of hard disk, the number of files in the hard disk can get more and more.Therefore, must take effective measure to manage these audio, video datas.
Summary of the invention
, playback big for the capacity pressure of the centralized stores that overcomes the audio-video document on the existing embedded multimedia system and search the deficiency that inconvenience, no uniform data are managed the invention provides a kind of capacity pressure that can effectively alleviate centralized stores, is convenient to playback and searches, realizes the management control method of audio-video document on the embedded multimedia system of unified data management.
The technical solution adopted for the present invention to solve the technical problems is:
The management control method of audio-video document on a kind of embedded multimedia system, described management control method may further comprise the steps:
1) each subregion of hard disk is distributed a structure, be used for characterizing file information of managing under each subregion;
2) when storage file, need obtain current system time, it as storage time, is used for naming the file of each corresponding file;
3), with current storage date name, the folder of creating a file under the subregion of storage, date file as storage, the storage file of phase same date all is placed under the same file, different date files, set up a date file chained list, be used for characterizing each the storage file information of same date not that is stored under a certain fdisk;
4), with current storage hour name, the folder of creating a file under the date file of storage, hour file as storage, storage file in identical hour all is placed under the same file, different hour files, set up a hour file chained list, be used for characterizing each different hours the storage file information that is stored under a certain fdisk;
5), name with the every minute and second of current storage, under hour file of storage, set up an every minute and second storage file, described every minute and second storage file comprises audio file and video file, and storage system is to described audio file and video file difference stores audio data and video data.
6), subregion handover management process as preferred a kind of scheme: described management control method is further comprising the steps of:, comprising:
6.1) if the capacity of current subregion less than spatial threshold to be provided with, it is current subregion that next subregion then is set, whether the capacity of judging next subregion again is less than spatial threshold to be provided with, judge one by one, know to find and satisfy the subregion of capacity greater than spatial threshold to be provided with, be set and be current subregion, carry out the storage of Voice ﹠ Video data;
6.2) if all subregions all less than spatial threshold to be provided with, with the data Delete All in the file the earliest hour of the earliest date deposited in each subregion, and then return 6.1).
Further, described management control method is further comprising the steps of: 7) ff process comprises:
7.1) the acquisition moment to be found;
7.2) according to the date in the moment to be found, in date file chained list, find the date file in the required moment;
7.3) according to the moment to be found hour, in hour file chained list, find hour file in the required moment;
7.4) branch time and second time according to required the time, find under this path file by name near this every minute and second time, again early than the file of this every minute and second time, be exactly the file of desired seek.
Technical conceive of the present invention is: according to the purposes characteristics of embedded system, the playback of hard disk stored file with search, all can be related with particular moment.The user need search and certain year certain month some time often of playback is divided certain second audio/video data.In addition, to the data of different subregions in the hard disk, also to reach the requirement of unified management.Based on above 2 points, the design of the storage file of this paper management, the method that has adopted the chained list management under a kind of structure array to combine with time named file (folder).
Beneficial effect of the present invention mainly shows: can effectively alleviate centralized stores capacity pressure, be convenient to playback and search, realize unified data management.
Description of drawings
Fig. 1 is a file storage organization synoptic diagram under each subregion.
Fig. 2 is the file storage process flow diagram flow chart.
Fig. 3 is the process flow diagram of ff.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
See figures.1.and.2, the management control method of audio-video document on a kind of embedded multimedia system, described management control method may further comprise the steps:
1) each subregion of hard disk is distributed a structure, be used for characterizing file information of managing under each subregion;
2) when storage file, need obtain current system time, it as storage time, is used for naming the file of each corresponding file;
3), with current storage date name, the folder of creating a file under the subregion of storage, date file as storage, the storage file of phase same date all is placed under the same file, different date files, set up a date file chained list, be used for characterizing each the storage file information of same date not that is stored under a certain fdisk;
4), with current storage hour name, the folder of creating a file under the date file of storage, hour file as storage, storage file in identical hour all is placed under the same file, different hour files, set up a hour file chained list, be used for characterizing each different hours the storage file information that is stored under a certain fdisk;
5), name with the every minute and second of current storage, under hour file of storage, set up an every minute and second storage file, described every minute and second storage file comprises audio file and video file, and storage system is to described audio file and video file difference stores audio data and video data.
In the present embodiment, described storage and Design of Management System may further comprise the steps:
At first, for each subregion of hard disk distributes a structure, be used for characterizing file information of managing under each subregion.Therefore, the storage file under the different subregions of hard disk can utilize this partitioned organization body space, reaches the purpose of unified management.
Secondly, storage system need be obtained current system time when storage file, it as storage time, is used for naming the file of each corresponding file.
Then, we are with current storage date name, and the folder of creating a file under the subregion of storage is as the date file of storage.The name form of date file is yyyymmdd, for example on July 17th, 2010, then names by 20100717 form.So, the storage file of phase same date all is placed under the same file, then, under the same fdisk, may has a plurality of date files and exist according to the difference on storage date.We set up a date file chained list to these different date files, are used for characterizing each the storage file information of same date not that is stored under a certain fdisk.
Then, we are with current storage hour name, and the folder of creating a file under the date file of storage is as hour file of storage.The name form of hour file is hh, and 23 o'clock on the 7th July in 2010 for example is then at＜subregion mount point 〉/20100717 file under, set up by name 23 file, the complete store path of this document folder is＜the subregion mount point 〉/20100717/23.So, the storage file in identical hour all is placed under the same file, then, under the same date file, may has a plurality of hours files and exist according to the difference of storage hour.We these different hour files, set up a hour file chained list in advance equally, are used for characterizing the information that is stored in different down hours storage file of file same date.
At last, we under hour file of storage, create storage file with the every minute and second name of current storage.The Voice ﹠ Video file designation form of storage is respectively mmss.audio and mmss.264.The file of 23: 26: 02 on the 17th July in 2010 storage for example, then at＜subregion mount point 〉/20100717/23 file under, set up the file of 2602.audio by name and 2602.264, also promptly the audio file of storage and the fullpath of video file be＜the subregion mount point constantly 〉/20100717/23/2602.audio and＜subregion mount point 〉/20100717/23/2602.264.Then, storage system had been distinguished storing audio and video data in these two files in the past.
With reference to figure 2, the file storage process comprises following step:
1) the subregion handover management of hard-disc storage, it selects suitable subregion for system, is used for audio-video document is stored in this subregion.
2) build the partitioned organization body space of hard disk, scan each subregion, for each subregion has been set up date file chained list and hour file chained list.
3) system according to system time, newly-built date file and hour folder node, adds to respectively in the corresponding chained list when the storage audio, video data.Like this, just can write the storage data by newly-built in the past Voice ﹠ Video file.
The specific implementation of present embodiment:
1. subregion handover management function
The subregion handover management mainly is to choose the current storage of suitable subregion as hard disk, carries out the storage of audio/video file.Here the so-called suitable two kinds of situations that comprise.
The one, the current partition holding of choosing need be a subregion that certain free space is arranged.If the spatial threshold that is provided with is 500M, the current partition holding of then choosing need be the subregion of a free space greater than 500M.Current subregion does not satisfy this condition, and it is current subregion that next subregion then is set, and judges whether to satisfy this condition.Judge that so one by one up to finding the subregion that satisfies condition, it is set to current subregion, carries out the storage of audio/video data.
The 2nd, all be discontented with under the situation that can require completely at all subregions with spatial threshold, with the data Delete All in the file the earliest hour of the earliest date deposited in each subregion, and then judge whether to satisfy the free space threshold requirement.If do not satisfy, then continue the deletion hard disk All Files of interior that hour the earliest of being deposited.By that analogy, delete hour file one by one, till a certain subregion satisfied the spatial threshold requirement, it was set to current subregion, carries out the storage of audio/video data.
Like this, under the situation that each subregion of hard disk all " is filled with ", just can reach the audio/video data of deletion oldest stored, the audio/video data of up-to-date input be continued the purpose of storage.So moving in circles, can make to be stored in audio/video data in the hard disk, is the data in nearest time period forever.
The structure space 2.1 create the division
This partial content mainly comprises the establishment of partitioned organization body space, and the establishment of date file chained list and hour file chained list.
The partitioned organization body is the structure that is used for managing each partition data of hard disk, and it is defined as follows:
typedef?struct?_tag_PtsInfo_t
{
Unsigned char uchPtsVol; // partition number
PtsSpcInfo_t PtsSpcInfo; // partition space information
DayList_t DayList; // date file chained list
}PtsInfo_t;
typedef?struct?_tag_PtsList_t
{
Unsigned char uchNum; // subregion number
Unsigned int uchCurOpIdx; The partition number of // current operation
PtsInfo_t* pPtsInfo; // partitioned organization body space
}PtsList_t;
For different hard disks, its subregion number may be different.So the establishment of partitioned organization body space in internal memory can use the method in dynamic assignment space to finish according to the subregion number of hard disk.
2.2 date created file chained list
Date file chained list is to be used for managed storage file of same date not under a certain fdisk.Date folder node structure and date file list structure body are defined as follows:
typedef?struct?_tag_DayLNode_t
{
Char chArLabel[9]; // date folder name
HourList_t HourList; Hour file chained list under // this date
struct?_tag_DayLNode_t?*pNextNode;
}DayLNode_t;
typedef?struct?_tag_DayList_t
{
Unsigned int uintNum; // table is long
DayLNode_t * pLNodeHead; // linked list head pointer
DayLNode_t * pLNodeCur; // chained list current pointer
}DayList_t;
The establishment of date file chained list can be created each subregion date file chained list by scanning each subregion of hard disk one by one, and the method that the date file under each subregion adds this chained list is finished.The main interface function of finishing this function is as follows:
Function prototype: int ScanDayList (const char*filepath, DayList_t*pList);
Function performance: create the date file chained list under each subregion of hard disk;
Parameter: filepath is the path of each subregion, and pList is the date file list structure body in each partitioned organization body;
Rreturn value: normally return 0, make mistakes and return negative value.
2.3 create hour file chained list
Hour file chained list is to be used for the storage file of the difference of managed storage under a certain date file hour.A hour folder node structure and a hour file list structure body are defined as follows:
typedef?struct?_tag_HourLNode_t
{
Char chArLabel[3]; // hour name
struct?_tag_HourLNode_t?*pNextNode;
}HourLNode_t;
typedef?struct?_tag_HourList_t
{
Unsigned int uintNum; // table is long
HourLNode_t * pLNodeHead; // linked list head pointer
HourLNode_t * pLNodeCur; // chained list current pointer
}HourList_t;
The establishment of hour file chained list can be created corresponding hour file chained list by scanning each date file of each subregion of hard disk one by one, and the method that hour file under each date file adds this chained list is finished.The main interface function of finishing this function is as follows:
Function prototype: int ScanHourList (const char*filepath, HourList_t * pList);
Function performance: create hour file chained list under each date file of hard disk;
Parameter: filepath is the path of each date file, and pList is hour file list structure body in each date folder node;
Rreturn value: normally return 0, make mistakes and return negative value.
3. add the management chain table function
Adding the management chain table function, is when the storage audio/video data, according to current storage time, in date file chained list and hour file chained list corresponding date folder node of interpolation and hour folder node is set one by one.The interpolation process of these two folder node is exactly the process that current audio/video data is stored in routing in the hard disk in fact.After this, just can create in corresponding fdisk path and open this document, the storage of carrying out audio/video data writes.
The management of this scheme file mainly is searching the particular moment file.
Fig. 3 is the process flow diagram of ff.
Because audio, video data is mainly used in backup and playback afterwards, therefore can find the required file of user to seem very important fast.In view of system has adopted the chained list management and has put into practice the method that named file (folder) combines and come storage file, the storage date of the All Files in each subregion and storage hour in hard disk so found in date file chained list that can be in internal memory and hour file chained list.With reference to the ff flow process of figure 3, the step of searching a file is:
7.1) the acquisition moment to be found.
7.2) according to the date in the moment to be found, in date file chained list, find the date file in the required moment.
7.3) according to the moment to be found hour, in hour file chained list, find hour file in the required moment.So far, determined the store path in the required moment.This store path is the path of a hour file, the store path that also promptly is accurate to hour.
7.4) branch time and second time according to required the time, find under this path file by name near this every minute and second time, again early than the file of this every minute and second time, be exactly the file of desired seek.
Claims (3)
1. the management control method of audio-video document on the embedded multimedia system, it is characterized in that: described management control method may further comprise the steps:
1) each subregion of hard disk is distributed a structure, be used for characterizing file information of managing under each subregion;
2) when storage file, need obtain current system time, it as storage time, is used for naming the file of each corresponding file;
3), with current storage date name, the folder of creating a file under the subregion of storage, date file as storage, the storage file of phase same date all is placed under the same file, different date files, set up a date file chained list, be used for characterizing each the storage file information of same date not that is stored under a certain fdisk;
4), with current storage hour name, the folder of creating a file under the date file of storage, hour file as storage, storage file in identical hour all is placed under the same file, different hour files, set up a hour file chained list, be used for characterizing each different hours the storage file information that is stored under a certain fdisk;
5), name with the every minute and second of current storage, under hour file of storage, set up an every minute and second storage file, described every minute and second storage file comprises audio file and video file, and storage system is to described audio file and video file difference stores audio data and video data.
2. the management control method of audio-video document on a kind of embedded multimedia system as claimed in claim 1, it is characterized in that: described management control method is further comprising the steps of:
6), subregion handover management process, comprising:
6.1) if the capacity of current subregion less than spatial threshold to be provided with, it is current subregion that next subregion then is set, whether the capacity of judging next subregion again is less than spatial threshold to be provided with, judge one by one, know to find and satisfy the subregion of capacity greater than spatial threshold to be provided with, be set and be current subregion, carry out the storage of Voice ﹠ Video data;
6.2) if all subregions all less than spatial threshold to be provided with, with the data Delete All in the file the earliest hour of the earliest date deposited in each subregion, and then return 6.1).
3. the management control method of audio-video document on a kind of embedded multimedia system as claimed in claim 1 or 2, it is characterized in that: described management control method is further comprising the steps of:
7) ff process comprises:
7.1) the acquisition moment to be found;
7.2) according to the date in the moment to be found, in date file chained list, find the date file in the required moment;
7.3) according to the moment to be found hour, in hour file chained list, find hour file in the required moment;
7.4) branch time and second time according to required the time, find under this path file by name near this every minute and second time, again early than the file of this every minute and second time, be exactly the file of desired seek.
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| CN102364941A (en) * | 2011-10-26 | 2012-02-29 | 广东威创视讯科技股份有限公司 | Method for storing recorded signals |
| CN102419775A (en) * | 2011-12-22 | 2012-04-18 | 厦门雅迅网络股份有限公司 | Method for storing and retrieving massive small files |
| CN103618912A (en) * | 2013-11-26 | 2014-03-05 | 乐视网信息技术（北京）股份有限公司 | Live telecast time shifting method and server |
| CN104281651A (en) * | 2014-09-16 | 2015-01-14 | 福建星网锐捷安防科技有限公司 | Method and system for searching large volume of video data |
| CN105068761A (en) * | 2015-07-31 | 2015-11-18 | 广东浩亚信息科技有限公司 | Easy-to-retrieve video screenshot storing method and system |
| CN108924639A (en) * | 2018-06-26 | 2018-11-30 | 焦点教育科技有限公司 | A kind of wireless video optical projection system applied to teaching scene |
| CN110347661A (en) * | 2019-07-05 | 2019-10-18 | 北京红山信息科技研究院有限公司 | Method, apparatus, server and the storage medium that data source is quasi real time put in storage |
| CN111382122A (en) * | 2020-03-11 | 2020-07-07 | 杭州涂鸦信息技术有限公司 | File management system and method for multi-channel network camera sub-equipment |
| CN113488082A (en) * | 2021-07-02 | 2021-10-08 | 山东恒宇电子有限公司 | Audio and video storage method for embedded equipment mechanical hard disk |
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| CN102364941A (en) * | 2011-10-26 | 2012-02-29 | 广东威创视讯科技股份有限公司 | Method for storing recorded signals |
| CN102419775A (en) * | 2011-12-22 | 2012-04-18 | 厦门雅迅网络股份有限公司 | Method for storing and retrieving massive small files |
| CN103618912A (en) * | 2013-11-26 | 2014-03-05 | 乐视网信息技术（北京）股份有限公司 | Live telecast time shifting method and server |
| CN104281651A (en) * | 2014-09-16 | 2015-01-14 | 福建星网锐捷安防科技有限公司 | Method and system for searching large volume of video data |
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| CN105068761A (en) * | 2015-07-31 | 2015-11-18 | 广东浩亚信息科技有限公司 | Easy-to-retrieve video screenshot storing method and system |
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| CN111382122A (en) * | 2020-03-11 | 2020-07-07 | 杭州涂鸦信息技术有限公司 | File management system and method for multi-channel network camera sub-equipment |
| CN111382122B (en) * | 2020-03-11 | 2024-01-30 | 杭州涂鸦信息技术有限公司 | File management system and method for multi-path network camera sub-equipment |
| CN113488082A (en) * | 2021-07-02 | 2021-10-08 | 山东恒宇电子有限公司 | Audio and video storage method for embedded equipment mechanical hard disk |
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Application publication date: 20110601 |