CN101325681A - Method for storing AVS encoding file format for video recorder and video server - Google Patents
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Abstract
The invention discloses a storage method for AVS coding file format of a video recorder and a video server, comprising defining a file head structure, a data region structure and an index region structure; the file head structure is composed of a file information structure, a media information structure and a content information structure; the data region structure is composed of a data region head information structure and a media data structure; the index region structure is composed of an index region head information structure and an index data structure. The method includes high storage efficiency, a simple technical proposal and low complexity of a chip realization as well as support VCR control and custom data retrieval, which is liable to be popularized, the AVS media storage format can push forward technical standard for AVS integral standard system to have access to the technical field of network security protection, so as to be further applied to intelligent surveillance in computer security protection.
Description
Affiliated technical field
The present invention relates to networked safety precaution monitoring technique field, relate to a kind of storage means that is used for the AVS encoding file format of video tape recorder and video server specifically
Background technology
As everyone knows, video monitoring is through the third generation full-digital network monitoring till now of first generation simulation monitoring, second generation half word monitoring development, and networked control has become the mainstream technology in safety precaution monitoring field.The digital network monitoring is closely related with the video image digital coding, in the world Audio Video coding Standard main two big series: the MPEG series standard that ISO/IEC JTC1 formulates; H.26x series video coding standard and G.7 serial audio coding standard that ITU formulates at multimedia communication.At present the source encoding standard that can select of audio frequency and video industry has four: MPEG-2, MPEG-4, MPEG-4AVC (be called for short AVC, also claim JVT, H.264), AVS.Wherein MPEG-2 is a first generation information source standard, and its excess-three is individual to be second generation standard.H.264 image coding technique develops into present main flow through MPEG1, MPEG2, MPEG4, all adopts international standards, and these outstanding technology make data volume googol image compression become relative small amount of data, is convenient to storage and Network Transmission.In order to tackle the needs of networking, China has also worked out the AVS national standard, AVS (Audio VideocodingStandard) is the second generation source encoding standard that China possesses independent intellectual property right, as its name suggests, " information source " is information " source ", the emphasis problem that source coding technique solves is the encoding compression problem of digital audio/video mass data (being primary data, information source), the emphasis problem that it solves is the encoding compression problem of digital audio/video mass data, is also referred to as digital audio/video encoding and decoding standard technology.Obviously, it is the prerequisite of links such as digital information transmission, storage, broadcast thereafter, is the general character basic standard of digital audio/video industry therefore.The formulation of AVS is at broadcast television industry at first, but along with the fast development of China's monitoring trade, the AVS coding that is applicable to monitoring trade has also been had urgent demand.Present domestic monitoring video file format is unified standard not, and each manufacturer adopts the standard storage video recording of enterprise oneself.Though have numerous file memory formats such as AVI, 3GPP, RMVB, WMV can reference in the world,, generally do not adopted owing to be not suitable for monitoring trade.Monitoring trade video file of the prior art has generally only defined the broadcast of audio, video data realization history file.When video file span for a long time the time, in order to search a certain incident, have to use modes such as putting soon, drag, observe to judge whether it is the incident origination point artificially, waste time and energy.How to solve the shortcoming of above-mentioned file memory format, a kind of method of the AVS of being applicable to video file storage format is provided, thereby the faster safe networked safety precaution supervisory control system that is applied to is the current important topic that solves of needing in present technique field.
Summary of the invention
The objective of the invention is to realize faster safe networked control in safety precaution monitoring technique field, a kind of storage means that is used for the AVS encoding file format of video tape recorder and video server is provided based on AVS source encoding standard.
In order to achieve the above object, the present invention by the following technical solutions: a kind of storage means that is used for the AVS encoding file format of video tape recorder and video server, comprise defined file header structure, data area structure and index area structure, be characterized in:
A. the file header structure is made up of fileinfo structure, media information structure and content information structure, and wherein: the fileinfo structure comprises: AVS file identifier, AVS FileVersion, document creation time, index area far from file original position and data field apart from the file original position;
The media information structure comprises: media information structural identifier, maximum bag length, average packet length, overall budget number, the zero-time of media file, lasting reproduction time, video and the audio coding type of media file;
The content information structure comprises: the title of the identifier of content information structure, presents content, the owner, copyright statement and the remark information of presents;
B. data area structure is made up of data field header structure and media data structure: wherein:
Data field header structure comprises: the identifier of data field header, the total bytes of data field, video or audio types;
The media data structure is made up of frame head and frame data, comprising: the time that the length of the type of frame head identifier, these frame data length, frame, the subtype of frame, sequence head, these frame data produce;
C. the index area structure is made up of index area header structure and index data structure, wherein:
Index area header structure comprises: index area header identifier, index area size, index entry number;
Index data structure comprises: the frame number of the I frame that time stamp, the index entry of the I frame that the I frame data of index entry correspondence are corresponding with offset word joint number, the index entry of file header relatively is corresponding.
AVS file identifier in the above-mentioned described fileinfo structure is followed successively by ' T ', ' A ', ' F ', ' F ', and the storage of AVS FileVersion network preface is defaulted as 0; The file total bytes is 32bits, and document creation chronomere is second, and the index area is 32bits far from the offset word joint number of file original position, and the data field is 32bits apart from the offset word joint number of file original position, is the storage of network preface.
Above-mentioned described media information structural identifier is followed successively by ' T ', ' A ', ' M ', ' I '; The long length that comprises video, audio frequency, warning one frame data of maximum bag, overall budget number comprise video packets number, audio pack number, the bag number of reporting to the police; Initial and the lasting reproduction time unit of media file is second.
The identifier of above-mentioned described content information structure is followed successively by ' T ', ' A ', ' C ', ' I '.
Above-mentioned described data field header identifier is followed successively by ' T ', ' A ', ' D ', ' C '; The total bytes of data field comprises header; Video or audio types can be video or audio frequency, also can be mixed file.
Above-mentioned described frame head identifier is decided to be 0x00000000; Frame data length does not comprise frame head, and this frame of type identification of frame is video or audio frequency or warning message; The chronomere that frame data produce is a millisecond.
In this storage means, the AVS FileVersion in the fileinfo structure can change this version number after revising upgrading, can select correct document analysis method according to this version number; The document creation time was as the criterion with the moment that the complete establishment of file finishes, and the index area is 32bits far from the offset word joint number of file original position, and network preface storage is 0 to be that expression does not have index when its value, does not have the file of index not support to drag; The data field is 32bits apart from the offset word joint number of file original position, the storage of network preface.
Maximum bag in the media information structure long (byte number) comprises video, audio frequency and warning, is not meant the packet that network receives here, but a frame comprises the video of this document definition frame head or the length of audio frequency or alert data; Average packet long (byte number) is to calculate by media data total bytes and overall budget number.
The total bytes of the data field in the data area structure comprises header; Type shows that notebook data is video or audio frequency, or mixed file; Bits is whether bit0 is whether 1 expression exists video data, and whether bit1 is whether 1 expression exists voice data, and whether bit2 is whether 1 expression exists alert data, and bit3 is the reservation position to bit31.
In the media data structure, the type of frame includes subtype, and the subtype of frame is at frame of video, and identifying this frame is sequence head, I frame, P frame; The length of sequence head is effective when this frame is the I frame of taking the lead; The time that frame data produce is millisecond; Frame data are real frame coding structure, and for frame of video, its form meets the AVS standard, and for audio frame, its form meets its coding standard that adopts.For warning message, the former state encapsulation.
The index area data are that a plurality of index entry sequence arrangement form in the index area structure, and the I frame data of index entry correspondence wherein relatively and the offset word joint number of file header; The time stamp of the I frame of index entry correspondence; The frame number of the I frame of index entry correspondence.Frame number is only carried out picture frame, and first image frame number is 1, increases progressively successively.
Owing to adopted the above-mentioned storage means that is used for the AVS encoding file format of video tape recorder and video server, and AVS be based on innovative technology and public technology from primary standard, this method code storage efficient height, and technical scheme is succinct, the chip implementation complexity is low, supports VCR (Video Cassette Recorder) to control, and supports location (by absolute time, relative progress etc.) fast, support self-defining data (as Intelligent Recognition, dynamic detection etc.) retrieval, be easy to promote.AVS comprises system, video, audio frequency, medium copyright management in interior complete standards system as a cover, for the digital audio/video industry provides more fully solution, and AVS media store form can advance this technical standard of AVS to enter networked security precautions technology field, extensively take precautions against in the intelligent monitoring and use, reached purpose of the present invention in computer security.
Embodiment
Below in conjunction with embodiment in detail the present invention is described in detail, a kind of storage means that is used for the AVS encoding file format of video tape recorder and video server comprises defined file header structure, data area structure and index area structure:
A. the file header structure is made up of fileinfo structure, media information structure and content information structure, wherein:
The fileinfo structure comprises: AVS file identifier, AVS FileVersion, document creation time, index area far from file original position and data field apart from the file original position; AVS file identifier in the fileinfo structure is followed successively by ' T ', ' A ', ' F ', ' F ', and the storage of AVS FileVersion network preface is defaulted as 0; The file total bytes is 32bits, and document creation chronomere is second, and the index area is 32bits far from the offset word joint number of file original position, and the data field is 32bits apart from the offset word joint number of file original position, is the storage of network preface;
The media information structure comprises: media information structural identifier, maximum bag length, average packet length, overall budget number, the zero-time of media file, lasting reproduction time, video and the audio coding type of media file; The media information structural identifier is followed successively by ' T ', ' A ', ' M ', ' I '; The long length that comprises video, audio frequency, warning one frame data of maximum bag, overall budget number comprise looks video packets number, audio pack number, warning bag number; Initial and the lasting reproduction time unit of media file is second.
The content information structure comprises: the title of the identifier of content information structure, presents content, the owner, copyright statement and the remark information of presents; The identifier of content information structure is followed successively by ' T ', ' A ', ' C ', ' I '.
File header structure embodiment (showing) as follows with hexadecimal:
The fileinfo structure:
54?41?46?46?00?00?00?00?00?30?4F?F8?08?05?10?10
35?36?01?24?00?30?4E?6D?00?00?03?8C；
Wherein, identifier ' T ', ' A ', ' F ', ' F ' of 54 41 46 46 expression fileinfo structures;
00 00 00 00 format versions followed of these files of expression number are 0;
00 30 4F F8 represent that the size of presents is 3166200 bytes;
08 05 10 10 35 36 01 24 expression presents are created in 16: 53: 54.292 on the 16th May in 2008;
00 30 4E 6D represent that the index area initial address is 3165804 bytes apart from the deviant of file first address;
00 00 03 8C represent that the data field initial address is 902 bytes apart from the deviant of file first address;
By reading the related data of this structure, can obtain essential informations such as file size and document creation time.
The media information structure:
54?41?4D?49?00?00?34?F5?00?00?19?37?00?00?01?E9
00?00?01?E9?00?00?00?00?00?00?00?00?08?05?10?10
35?22?00?00?00?00?00?14?00?00?00?00；
Wherein, identifier ' T ', ' A ', ' M ', ' I ' of 54 41 4D, 49 presentation medium message structures;
00 00 34 F5 represent that media data packet size maximum in the presents is 13557 bytes;
The mean size of media data packet is 6455 bytes in the 00 00 19 37 expression presents;
00 00 01 E9 represent that media data packet adds up to 489 in the presents;
00 00 01 E9 represent that the video media-data bag adds up to 489 in the presents;
00 00 00 00 expression presents sound intermediate frequency media data packet add up to 0;
The warning media data packet adds up to 0 in the 00 00 00 00 expression presents;
The zero-time of 08 05 10 10 35 22 00 00 expression presents is 16: 53: 34 on the 16th May in 2008, owing to only be accurate to second, so last two positions 0;
It is 20 seconds that 00 00 00 14 expression presents continue reproduction time;
00 00 expression video coding types are default type;
00 00 expression audio coding types are default type;
By reading the related data of this structure, can obtain the information such as composition, coding of file.
The content information structure:
54?41?43?49?74?65?73?74?20?66?69?6C?65?00?00.........
...00?00?00?72?61?72?65?00?00.........
...00?00?00............
...00?00?00?74?65?73?74?00?00.........
00?00?00；
Wherein, identifier ' T ', ' A ', ' C ', ' I ' of 54 41 43 49 expression content information structures;
The title of totally 32 byte representation presents such as 74 65 73 74 20 66 69 6C, 65 00 00... etc.; The author of totally 32 byte representation presents such as 72 61 72 65 00 00... etc.;
00 00 00............ are copyright statements of 256 bytes, and this example all is 0;
The keyword of totally 256 byte representation presents such as 74 65 73 74 00 00... etc.;
00 00 00 is the remark information of 256 bytes, and this example all is 0
By reading the related data of notebook data structure, can obtain content correlated informations such as title, author, copyright, keyword
B. data area structure is made up of data field header structure and media data structure: wherein: data field header structure comprises: the identifier of data field header, the total bytes of data field, video or audio types; Data field header identifier is followed successively by ' T ', ' A ', ' D ', ' C ', and the total bytes of data field comprises header, and video or audio types can be video or audio frequency, also can be mixed file; The media data structure is made up of frame head and frame data, comprising: the time that the length of the type of frame head identifier, these frame data length, frame, the subtype of frame, sequence head, these frame data produce;
The frame head identifier is 0x00000000; Frame data length does not comprise frame head, and this frame of type identification of frame is video or audio frequency or warning message, and the chronomere that frame data produce is a millisecond.
Data area structure embodiment (showing) as follows with hexadecimal:
54?41?44?43?00?30?4A?E6?00?00?00?01；
Wherein, identifier ' T ', ' A ', ' D ', ' C ' of 54 41 44 43 expression data field header information structures; 00 30 4A E6 represent that the size of data field is 3164902 bytes;
00 00 00 01 are the sign position, and its lowest order represents whether there is video, whether inferior low bit representation exists audio frequency, and whether expression has alert data successively again, and video data is only arranged in this example;
The data field is exactly the media data of each frame except header data, is the example of a video requency frame data below:
00?00?00?00?00?00?00?8A?00?00?00?8A?08?05?10?10
35?22?00?00......；
Wherein, 00 00 00 00 is the identifier of media data frame; 00 00 00 8A represent that these frame data size is 138 bytes;
00 these frame data of expression are video data;
00 this frame of expression video data is the band sequence head;
00 8A represents that sequence head length is 138;
08 05 10 10 35 22 00 00 these frame time stamps of expression are 16: 53: 54 on the 16th May in 2008; What follow later is the sequence head of 138 bytes;
Data area stores be actual media data, comprise several types such as video, audio frequency, alert data.
C. the index area structure is made up of index area header structure and index data structure, wherein:
Index area header structure comprises: index area header identifier, index area size, index entry number;
Index data structure comprises: the frame number of the I frame that time stamp, the index entry of the I frame that the I frame data of index entry correspondence are corresponding with offset word joint number, the index entry of file header relatively is corresponding; The index area only indexes to the I frame of all images frame, its index area header identifier is followed successively by ' T ', ' A ', ' I ', ' H ', the index area size comprises header, the corresponding I frame of each index entry, the index area data are that several index entry sequence arrangement form, and the I frame data of index entry correspondence are with corresponding with the offset word joint number of file header.
Index area structure embodiment (showing) as follows with hexadecimal:
54?41?49?48?00?00?01?8C?00?00?00?18
Wherein, identifier ' T ', ' A ', ' I ', ' H ' of 54 41 44 43 expression index area header information structures;
00 00 01 8C represent that index area length is 396 bytes;
00 00 00 18 expressions one have 24 entry indexs;
Be the index of a plurality of order dischargings after the indexing head information, each index correspondence a video I frame, is expressed as follows
00?12?E7?73?08?05?10?10?35?2A?02?54?00?00?00?C5
Wherein, the I frame pitch of 00 12 E7,73 these index correspondences of expression is 1238899 bytes from the deviant of file first address;
The I frame of these index correspondences of 08 05 10 10 35 2A 02 54 expression be that to stab be 2008 16: 53: 42.596 on the 16th;
00 00 00 C5 represent that its frame number is 197;
By the help of index area, can realize that position, time etc. by size that file is play position.
Claims (8)
1. a storage means that is used for the AVS encoding file format of video tape recorder and video server comprises defined file header structure, data area structure and index area structure, it is characterized in that:
A. the file header structure is made up of fileinfo structure, media information structure and content information structure, wherein:
The fileinfo structure comprises: AVS file identifier, AVS FileVersion, document creation time, index area far from file original position and data field apart from the file original position;
The media information structure comprises: media information structural identifier, maximum bag length, average packet length, overall budget number, the zero-time of media file, lasting reproduction time, video and the audio coding type of media file;
The content information structure comprises: the title of the identifier of content information structure, presents content, the owner, copyright statement and the remark information of presents;
B. data area structure is made up of data field header structure and media data structure: wherein:
Data field header structure comprises: the identifier of data field header, the total bytes of data field, video or audio types;
The media data structure is made up of frame head and frame data, comprising: the time that the length of the type of frame head identifier, these frame data length, frame, the subtype of frame, sequence head, these frame data produce;
C. the index area structure is made up of index area header structure and index data structure, wherein:
Index area header structure comprises: index area header identifier, index area size, index entry number;
Index data structure comprises: the frame number of the I frame that time stamp, the index entry of the I frame that the I frame data of index entry correspondence are corresponding with offset word joint number, the index entry of file header relatively is corresponding.
2. the storage means of AVS encoding file format according to claim 1, it is characterized in that: the AVS file identifier in the above-mentioned described fileinfo structure, be followed successively by ' T ', ' A ', ' F ', ' F ', the storage of AVS FileVersion network preface is defaulted as 0; The file total bytes is 32bits, and document creation chronomere is second, and the index area is 32bits far from the offset word joint number of file original position, and the data field is 32bits apart from the offset word joint number of file original position, is the storage of network preface.
3. the storage means of AVS encoding file format according to claim 1 is characterized in that: above-mentioned described media information structural identifier is followed successively by ' T ', ' A ', ' M ', ' I '; The long length that comprises video, audio frequency, warning one frame data of maximum bag, overall budget number comprise looks video packets number, audio pack number, warning bag number; Initial and the lasting reproduction time unit of media file is second.
4. the storage means of AVS encoding file format according to claim 1 is characterized in that: the identifier of above-mentioned described content information structure is followed successively by ' T ', ' A ', ' C ', ' I '.
5. the storage means of AVS encoding file format according to claim 1 is characterized in that: above-mentioned described data field header identifier is followed successively by ' T ', ' A ', ' D ', ' C '; The total bytes of data field comprises header; Video or audio types can be video or audio frequency, also can be mixed file.
6. the storage means of AVS encoding file format according to claim 1 is characterized in that: above-mentioned described frame head identifier is decided to be 0x00000000; Frame data length does not comprise frame head, and this frame of type identification of frame is video or audio frequency or warning message; The chronomere that frame data produce is a millisecond.
7. the storage means of AVS encoding file format according to claim 1 is characterized in that: above-mentioned described index area indexes to the I frame of all images frame, and its index area header identifier is followed successively by ' T ', ' A ', ' I ', ' H '; The index area size comprises header, the corresponding I frame of each index entry.
8. the storage means of AVS encoding file format according to claim 1 is characterized in that: above-mentioned described index area data are that a few index entry sequence arrangement form, and the I frame data of index entry correspondence are with corresponding with the offset word joint number of file header.
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| CN105338415B (en) * | 2015-10-29 | 2018-10-23 | 北京威动科技有限公司 | file navigation playing method and device |
| CN107147412A (en) * | 2017-05-27 | 2017-09-08 | 深圳市安普尔科技有限公司 | Vehicle control syetem and its control method |
| CN111163297A (en) * | 2020-02-10 | 2020-05-15 | 迈享科技(深圳)有限公司 | Method for realizing high concurrency and quick playback of video monitoring cloud storage |
| CN113973222A (en) * | 2021-12-02 | 2022-01-25 | 成都统信软件技术有限公司 | Video playing method and device and computing equipment |
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