CN102231847B - Direct and accurate frame positioning method supporting stream media files - Google Patents
Direct and accurate frame positioning method supporting stream media files Download PDFInfo
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- CN102231847B CN102231847B CN 201110060520 CN201110060520A CN102231847B CN 102231847 B CN102231847 B CN 102231847B CN 201110060520 CN201110060520 CN 201110060520 CN 201110060520 A CN201110060520 A CN 201110060520A CN 102231847 B CN102231847 B CN 102231847B
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Abstract
The invention discloses a direct and accurate frame positioning method supporting stream media files. The method comprises the following steps of: reading a stream media file packet and recording frame data; judging the recorded frame data and saving the frame data into a corresponding secondary index; when the secondary index reaches a preset full state, saving the frame data into the secondary index in a corresponding primary index; and generating a header file. According to the embodiment of the invention, a received stream media packet is analyzed; data in the packet is divided for extracting effective information, and the extracted effective information is recorded in a companion file, therefore, accurate processing, rapid search and accurate editing of stream media files in nonlinear video processing can be realized, the editing time of a user can be greatly reduced, and the working efficiency can be improved remarkably.
Description
Technical field
The present invention relates to the programme production technique field, relate in particular to the direct frame accurate positioning method of a kind of support files in stream media.
Background technology
Along with the more and more faster development of multimedia video business, the storage medium of file has been not limited to cassette tape or CD, and the Streaming Media that is suitable for Internet Transmission has obtained more concern.Yet under the large Policy Background of the country of the at present integration of three networks, to network, TV, the development of telecommunications three macroreticulars has proposed very high request.
Streaming Media is in chronological sequence order transmission and continuant/video data stream of playing on the data network, and it also more and more is widely used in video and television production field as a kind of new media load mode.The stream transmission mode of Streaming Media can be divided into the packet that comprises one by one basic minute block message with multimedia files such as whole A/V and 3D through special partitioned mode, transmitted to subscriber computer is continuous, real-time by video server.Therefore the user needn't wait until as adopting downloading mode that the whole downloads of whole file are complete, play after the multimedia files such as A/V, the 3D decoding of decoding device (hardware or software) to compression and watch but only need can utilize at user's computer through the startups of seconds or tens of seconds time-delay, this moment, the remainder of multimedia file continued to download by the server on backstage simultaneously.
In the prior art, at home in the content platform of each wired company of network, the files in stream media of including, edit, store, broadcasting all is as main, to also have PS (DVD, VCD, VOB etc.) streaming material of part take TS (Mpeg, H.264).In Network TV Station built, again with FLV (H.264), MP4 (H.264) files in stream media was main.And these files in stream media for different fields, have the characteristics of oneself separately, and file itself does not have the Indexing Mechanism of efficient location, in order to realize low code check, high-quality picture requirement, generally all adopt Mpeg2IBP, H.264 the compressed format of long GOP.
The inventor is when realization is of the present invention, find that there are the following problems at least in the prior art: to the industry of video editing making, although the DVD CD on the file of our usefulness and the market or the online online file of playing are identical from the angle of basic data, but we play and look into news efficient to these files is different, traditional media file has the index of being convenient to quick search to preserve in it usually, and the files in stream media of transmission Network Based is only take played in order as purpose, usually lack enough index informations, briefly and be unfavorable for editor, but because nowadays the quarry in video editing making field has been not limited to traditional sucrose, and be more prone to support emerging medium such as network flow-medium, so need to provide an effective scheme to realize this demand.Because each second of the program of TV station even each frame all relate to high cost issues and key, therefore, we need frame accurately to be positioned at sometime, the click time can play at any time, buffering can not be arranged, therefore, use prior art can cause the waste of the program making resource of TV station, how not only fast but also accurately locating frame then becomes particularly crucial.
Summary of the invention
The invention provides the direct frame accurate positioning method of a kind of support files in stream media, i.e. the conversion of files in stream media in the Nonlinear Processing system.Thereby solved in the prior art, owing to use nonlinear technology to process the buffer problem that media file occurs, and then cause the problem of time and the wasting of resources.
For achieving the above object, the present invention proposes the direct frame accurate positioning method of a kind of support files in stream media, comprising:
Reading flow media file bag also records frame data;
Frame data to record are judged, and according to the result of described judgement, frame data are deposited in the corresponding secondary index;
When secondary index reaches completely default, the frame data in the index are deposited in the corresponding one-level index;
Generate header file.
The technical scheme of the embodiment of the invention has the following advantages: the embodiment of the invention receives flow media data packet by analysis; With the bag in Data Division and extract effective information recording/in CompanionFile.Thereby become possibility so that nonlinear video is processed accurate processing, the quick-searching that can make files in stream media and accurately edited, then reduced greatly the time of user's edit operation, improved greatly operating efficiency.
Description of drawings
Fig. 1 is the direct frame accurate positioning method of a kind of support files in stream media flow chart in the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of support files in stream media direct frame accurate positioning method, by the embodiment of the invention, the data transaction in the files in stream media bag is become nonlinear way, and each frame in the file bag is all reached accurate location.Thereby so that in the nonlinear video processing procedure, processing, retrieval and the editor of files in stream media become possibility, then so that when making the program of TV station, shortened the time of waiting for, saved resource.
Present stream media technology is very unfavorable to the editor of TV station's video field.So just need us in the process that file imports, packet to be taken apart, each frame is analyzed out, write as a discernible file.Equal to set up a catalogue, read and write again afterwards.
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail:
As shown in Figure 1, be a kind of unified stunt control method schematic diagram of the embodiment of the invention, comprise:
Step S101, reading flow media file bag.
Receive a plurality of files in stream media bags, and respectively they are carried out frame data and read.
Step S102, the record frame data.Find program stream tabulation PAT data block, the record frame data.Simultaneously, at one-level video GOP index, one-level video Payload index and one-level audio index headspace.
Step S103 judges the frame data of record, and according to the result who judges, frame data is deposited in the corresponding secondary index.
Concrete, the convection current media data block is treated to respectively block of video data, audio data block and other data blocks.Take block of video data as example, order reads frame data, judges whether described frame is I frame key frame, if so, then this frame sequential is deposited in the secondary video GOP index, if B frame or P frame, then order is deposited in the secondary Payload index.When a data block read complete after, operation note is write in the Sequenceheader data.
Step S104 when secondary index reaches completely default, deposits all frame data in the index in the corresponding one-level index in.
Concrete, every one-level index has its capacity limit, when described secondary index reaches capacity limit, all frame data in the secondary index is deposited in its corresponding one-level index.Like this, so that secondary index can receive follow-up data again.
Step S105 generates header file.
Voice data in file bag and the read method of other data and step S103 are identical with method among the S104, when all data of a file bag read complete after, namely generate a header file.
The embodiment of the invention is by so direct frame accurate editing method of a kind of support files in stream media, and the embodiment of the invention receives flow media data packet by analysis; With the bag in Data Division and extract effective information recording/in CompanionFile.Thereby become possibility so that nonlinear video is processed accurate processing, the quick-searching that can make files in stream media and accurately edited, then reduced greatly the time of user's edit operation, improved greatly operating efficiency.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by hardware, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding, technical scheme of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
Above disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (3)
1. support the direct frame accurate positioning method of files in stream media for one kind, it is characterized in that, comprising:
Reading flow media file bag also records frame data;
Frame data to record are judged, and according to the result of described judgement, frame data are deposited in the corresponding secondary index;
When secondary index reaches completely default, the frame data in the index are deposited in the corresponding one-level index;
Generate header file;
Described frame data to record judge, and according to the result of described judgement, frame data are deposited in the corresponding secondary index specifically comprise:
The convection current media data block is treated to respectively block of video data, audio data block and other data blocks and order reads frame data;
Judge whether described frame is I frame key frame, if so, then this frame sequential is deposited in the secondary video GOP index; If B frame or P frame, then order is deposited in the secondary Payload index;
When a data block read complete after, operation note is write in the Sequenceheader data.
2. support as claimed in claim 1 the direct frame accurate positioning method of files in stream media, it is characterized in that, described record frame data are specially:
Find program stream tabulation PAT data block, the record frame data; Simultaneously, at one-level video GOP index, headspace in one-level video Payload index and the one-level audio index.
3. support as claimed in claim 1 the direct frame accurate positioning method of files in stream media, it is characterized in that, described when secondary index reaches completely default, all frame data in the index are deposited in the corresponding one-level index specifically comprise:
When described secondary index reaches capacity limit, all frame data in the described secondary index are deposited in its corresponding one-level index.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110060520 CN102231847B (en) | 2011-03-14 | 2011-03-14 | Direct and accurate frame positioning method supporting stream media files |
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| CN 201110060520 CN102231847B (en) | 2011-03-14 | 2011-03-14 | Direct and accurate frame positioning method supporting stream media files |
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| CN102231847A CN102231847A (en) | 2011-11-02 |
| CN102231847B true CN102231847B (en) | 2013-03-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102752633B (en) * | 2011-12-29 | 2017-12-29 | 新奥特（北京）视频技术有限公司 | A kind of method of video and audio file synthesis |
| CN104135628B (en) * | 2013-05-03 | 2018-01-30 | 安凯(广州)微电子技术有限公司 | A kind of video editing method and terminal |
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| CN100544439C (en) * | 2006-11-21 | 2009-09-23 | 华为技术有限公司 | A kind of method and system of supporting the media data of multiple coded format |
| CN101127898A (en) * | 2007-09-20 | 2008-02-20 | Ut斯达康通讯有限公司 | Slice storage and streaming service method for stream media system and multimedia files |
| US8909806B2 (en) * | 2009-03-16 | 2014-12-09 | Microsoft Corporation | Delivering cacheable streaming media presentations |
| CN101917388A (en) * | 2009-12-17 | 2010-12-15 | 新奥特（北京）视频技术有限公司 | Streaming media data storage method and device |
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Owner name: BEIJING YUEYING TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: XIN'AOTE(BEIJING) VIDEO TECHNOLOGY CO., LTD. Effective date: 20150730 |
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