CN102857834A - Video progress reading method - Google Patents
Video progress reading method Download PDFInfo
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- CN102857834A CN102857834A CN2012103425269A CN201210342526A CN102857834A CN 102857834 A CN102857834 A CN 102857834A CN 2012103425269 A CN2012103425269 A CN 2012103425269A CN 201210342526 A CN201210342526 A CN 201210342526A CN 102857834 A CN102857834 A CN 102857834A
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Abstract
The invention relates to a video progress reading method. The video progress reading method includes extracting timestamp files of different frames in a video file, and combining the different timestamp files to form a time index file according to a time sequence; finding out the corresponding timestamp files in the time index file according to frame time and frame index position on the basis of the input video reading time, and then directly reading video at corresponding addresses in the video file according to frame video positions of the timestamp files. Each timestamp file includes the frame time, the frame index position and the frame video position. Since the video file reading position is found out in the time index file, and content of the position is read directly in the video file, so that video file reading efficiency is increased greatly, time for searching the reading position is shortened, and user experience is improved effectively.
Description
Technical field
The present invention relates to video technique, is the method that reads the video progress concretely.
Background technology
The linear fashion that content in the video file normally increases progressively with the time is stored in equipment or the server.Every frame in the video is all with the regular time stamp, to show the corresponding time of this frame in video reads and plays.It is to compare one by one with the time of reading of input and the timestamp of frame that traditional video reads, until find equal timestamp or from that nearest frame of timestamp.Clearly but when video file was very long, this method that reads of relatively searching one by one needed long time, obviously will reduce the reading efficiency of file, the user video file is carried out random time when reading picture easily to stagnate be exactly this reason.
Summary of the invention
For above-mentioned problem, the invention provides a kind of method that reads the video progress, when reading video file, increase substantially the reading efficiency of file, improve user's experience property.
The present invention reads the method for video progress, comprising:
Settling time index: the timestamp file that extracts each frame in the video file, with each timestamp file makeup time index file in chronological order, in each timestamp file, comprise respectively frame time, frame index position and frame video location, wherein frame time is the timestamp of frame in video file, the address of mapping frame in the time index file, frame index position, the address of frame video location mapping frame in video file;
Load Game: the video according to input reads the time, in the time index file, find corresponding timestamp file by described frame time and frame index position, directly read again the video of corresponding address in the video file according to the frame video location of timestamp file.
Usually the speed that reads index file is more many soon than the speed of reading of content file, therefore set up the time index file with audio video synchronization, obtain video and read the correspondence position of time in video file by reading the time index file, then directly remove to read video file to this position, progressively search in the video file and not be used in, significantly improved thus and searched the time of reading the position, improved reading efficiency.
Concrete, described Load Game comprises:
A. judge in the timestamp file that the video of input reads the difference of time and video zero-time;
B. in the timestamp file take the video zero-time as starting point, be offset backward described difference;
C. read the address of frame in video file of the frame video location mapping of the rear timestamp file of skew;
D. read the corresponding content of address described in the video file.
Preferably, step a is before judging described difference, and the video of judging first input reads the time whether in the video time scope, if would continue to carry out, if not video read termination.
Preferably, step b judges that the frame time of current time stamp file and the video of input read the error of time, if error amount in accuracy rating, then continues to carry out, if greater than accuracy rating, then carry out the position adjustment according to error amount after the described difference of skew.
On above-mentioned basis, the described a kind of optional method that carries out the position adjustment according to error amount is: the point centered by the position of current time stamp file of circulation, plus or minus according to error amount, corresponding left or right avertence shift error value 1/2 after, the frame time that reads again current time stamp file carries out describedly reading the error judgment of time with video, until described error amount is in accuracy rating.Adopting the span of 1/2 error amount to adjust, is to set according to the searching algorithm of " dichotomy ", also can adjust according to other span, and for example 1/3 error amount is offset etc. frame by frame.
Preferably, described video file is the video file, and method of the present invention is not suitable for using at real-time video.
The method that reads the video progress of the present invention, by find the position of reading video file at the time index file, then on video file, directly read the content of this position, significantly improved the efficient that reads video file, shortened and searched the time of reading the position, effectively raised user's experience property.
Below in conjunction with the embodiment of embodiment, foregoing of the present invention is described in further detail again.But this should be interpreted as that the scope of the above-mentioned theme of the present invention only limits to following example.Do not breaking away from the above-mentioned technological thought situation of the present invention, various replacements or change according to ordinary skill knowledge and customary means are made all should comprise within the scope of the invention.
Embodiment
The present invention reads the method for video progress, comprising:
Settling time index: the timestamp file that extracts each frame in the video file, with each timestamp file makeup time index file in chronological order, in each timestamp file, comprise respectively frame time, frame index position and frame video location, wherein frame time is the timestamp of frame in video file, the address of mapping frame in the time index file, frame index position, the address of frame video location mapping frame in video file;
Load Game:
A. the video of judging input reads time q whether in the video time scope, if would continue to carry out, if not video read termination.
Judge that in the timestamp file of setting up the video of input reads the difference d of time q and video zero-time s;
B. in the timestamp file take video zero-time s as starting point, be offset backward described difference d.The frame time of the current time stamp file after the judgement skew and the video of input read the error of time q, if error amount m in accuracy rating, then continues to carry out; If greater than accuracy rating, point centered by the position of current time stamp file, when error amount m is timing, left 1/2 of offset error value m, when error amount m when negative, to the right 1/2 of offset error value m, read again afterwards the frame time of current time stamp file, with described frame time repeating step b read the error judgment of time with video, until error is in accuracy rating;
C. read the address of frame in video file of the frame video location mapping of timestamp file after skew is finished;
D. read the corresponding content of address described in the video file.
Video file described in the present embodiment is the video file.
Obtain video and read the correspondence position of time in video file by reading the time index file, then directly remove to read video file to this position, progressively search in the video file and not be used in, significantly improved thus and searched the time of reading the position, improved reading efficiency.
Claims (6)
1. read the method for video progress, its feature comprises:
Settling time index: the timestamp file that extracts each frame in the video file, with each timestamp file makeup time index file in chronological order, in each timestamp file, comprise respectively frame time, frame index position and frame video location, wherein frame time is the timestamp of frame in video file, the address of mapping frame in the time index file, frame index position, the address of frame video location mapping frame in video file;
Load Game: the video according to input reads the time, in the time index file, find corresponding timestamp file by described frame time and frame index position, directly read again the video of corresponding address in the video file according to the frame video location of timestamp file.
2. the method that reads the video progress as claimed in claim 1, it is characterized by: described Load Game comprises:
A. judge in the timestamp file that the video of input reads the difference of time and video zero-time;
B. in the timestamp file take the video zero-time as starting point, be offset backward described difference;
C. read the address of frame in video file of the frame video location mapping of the rear timestamp file of skew;
D. read the corresponding content of address described in the video file.
3. the method that reads the video progress as claimed in claim 2 is characterized by: step a is before judging described difference, and the video of judging first input reads the time whether in the video time scope, if would continue to carry out, if not video read termination.
4. the method that reads the video progress as claimed in claim 2, it is characterized by: step b is after the described difference of skew, judge that the frame time of current time stamp file and the video of input read the error of time, if error amount is in accuracy rating, then continue to carry out, if greater than accuracy rating, then carry out the position adjustment according to error amount.
5. the method that reads the video progress as claimed in claim 4, it is characterized by: describedly carry out the position according to error amount and be adjusted into: the point centered by the position of current time stamp file of circulation, plus or minus according to error amount, corresponding left or right avertence shift error value 1/2 after, the frame time that reads again current time stamp file carries out describedly reading the error judgment of time with video, until described error amount is in accuracy rating.
6. such as the described method that reads the video progress of one of claim 1 to 5, it is characterized by: described video file is the video file.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210342526.9A CN102857834B (en) | 2012-09-17 | 2012-09-17 | Read the method for video progress |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210342526.9A CN102857834B (en) | 2012-09-17 | 2012-09-17 | Read the method for video progress |
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| Publication Number | Publication Date |
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| CN102857834A true CN102857834A (en) | 2013-01-02 |
| CN102857834B CN102857834B (en) | 2016-06-15 |
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| CN201210342526.9A Expired - Fee Related CN102857834B (en) | 2012-09-17 | 2012-09-17 | Read the method for video progress |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104918120A (en) * | 2014-03-12 | 2015-09-16 | 联想(北京)有限公司 | Playing progress adjustment method and electronic apparatus |
| CN105657427A (en) * | 2016-01-25 | 2016-06-08 | 成都国铁电气设备有限公司 | High-definition image compression method and system suitable for catenary |
| CN112558873A (en) * | 2020-12-14 | 2021-03-26 | 上海创米科技有限公司 | Embedded audio and video data storage, retrieval and deletion method and device and memory |
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| CN101325681A (en) * | 2008-07-25 | 2008-12-17 | 北京声迅电子有限公司 | Method for storing AVS encoding file format for video recorder and video server |
| CN101873355A (en) * | 2010-06-28 | 2010-10-27 | 深圳市迅雷网络技术有限公司 | Method, device and system for downloading file |
| CN102131106A (en) * | 2010-12-22 | 2011-07-20 | 华为技术有限公司 | Method, device and system for playing streaming media contents |
| CN102510519A (en) * | 2011-10-11 | 2012-06-20 | 成都市华为赛门铁克科技有限公司 | Streaming media data processing method, playing method and device |
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- 2012-09-17 CN CN201210342526.9A patent/CN102857834B/en not_active Expired - Fee Related
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| CN101217638A (en) * | 2007-12-28 | 2008-07-09 | 深圳市迅雷网络技术有限公司 | A downloading method, system and device of video file fragmentation |
| CN101325681A (en) * | 2008-07-25 | 2008-12-17 | 北京声迅电子有限公司 | Method for storing AVS encoding file format for video recorder and video server |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104918120A (en) * | 2014-03-12 | 2015-09-16 | 联想(北京)有限公司 | Playing progress adjustment method and electronic apparatus |
| CN104918120B (en) * | 2014-03-12 | 2019-03-29 | 联想(北京)有限公司 | A kind of playback progress adjusting method and electronic equipment |
| CN105657427A (en) * | 2016-01-25 | 2016-06-08 | 成都国铁电气设备有限公司 | High-definition image compression method and system suitable for catenary |
| CN112558873A (en) * | 2020-12-14 | 2021-03-26 | 上海创米科技有限公司 | Embedded audio and video data storage, retrieval and deletion method and device and memory |
| US11250888B1 (en) | 2020-12-14 | 2022-02-15 | Shanghai Imilab Technology Co., Ltd. | Flash memory and method for storing and retrieving embedded audio video data |
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| CN102857834B (en) | 2016-06-15 |
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