CN101521782A - Method for fast-forward and fast-backward browsing video, system and multimedia equipment - Google Patents
Method for fast-forward and fast-backward browsing video, system and multimedia equipment Download PDFInfo
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- CN101521782A CN101521782A CN200810241752A CN200810241752A CN101521782A CN 101521782 A CN101521782 A CN 101521782A CN 200810241752 A CN200810241752 A CN 200810241752A CN 200810241752 A CN200810241752 A CN 200810241752A CN 101521782 A CN101521782 A CN 101521782A
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Abstract
The invention is applicable to the technical field of video, and provides a method for fast-forward and fast-backward browsing video, a system and multimedia equipment. The method comprises the following steps: extracting a video frame of an equal difference position corresponding to fast-forward and fast-backward times in a source video file; and judging whether the video frame is a key frame, storing the key frame to a fast-forward and fast-backward video file if the video frame is the key frame, otherwise recoding the video frame to generate the key frame, and storing the generated key frame to the fast-forward and fast-backward video file. In one embodiment of the invention, by extracting the video frame in the source video file, storing the key frame to the fast-forward and fast-backward video file according to the judgment of the video frame, recoding the non-key frame to generate the key frame, and storing the generated key frame to the fast-forward and fast-backward video file in the same way, the method achieves multiple fast-forward and fast-backward even browse.
Description
Technical field
The invention belongs to the video technique field, relate in particular to a kind of method, system and multimedia equipment of fast-forward and fast-backward browsing video.
Background technology
Continuous development along with video technique, the fast-forward and fast-backward browsing of many multiples can be provided for the user, for example 2 times, 4 times, 8 times etc., when receiving the fast-forward and fast-backward browsing instruction of user's input, search in the video file of source and the key frame of video of the fast corresponding equal difference of the multiple position of advancing and retreat, and the extraction key frame, reformulate new video file, realize the fast-forward and fast-backward browsing of source video file by playing this new video file.
But when the frame that extracts in the equal difference position of source video file is non-key frame, search the key frame nearest with this equal difference position, key frame as this equal difference position, be stored in new video file, when playing this video file, be not that there is certain error in the fast advance and retreat of source video file to evenly the browsing of source video file.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of method of fast-forward and fast-backward browsing video, is intended to solve in the prior art the fast-forward and fast-backward browsing of source video file and non-homogeneous, has the problem of error.
The embodiment of the invention is achieved in that a kind of method of fast-forward and fast-backward browsing video, and described method comprises the steps:
In the extraction source video file with the frame of video of the corresponding equal difference of fast advance and retreat multiple position;
Judge whether described frame of video is key frame, if, then key frame is stored into fast advance and retreat video file, otherwise, described frame of video is encoded again, generate key frame, and store the key frame that generates into described fast advance and retreat video file;
Play described fast advance and retreat video file.
Another purpose of the embodiment of the invention is to provide a kind of system of fast-forward and fast-backward browsing video, and described system comprises:
The frame of video extraction module is used for the extraction source video file and the frame of video of the corresponding equal difference of the multiple position of advancing and retreat soon;
Judge module is used to judge whether described frame of video is key frame;
The recompile module is used for when described judge module judges that described frame of video is non-key frame described frame of video being encoded again, generates key frame;
Memory module is used for that described judge module is judged as the frame of video of key frame and the key frame of described recompile module generation stores fast advance and retreat video file into; And
The video file playing module is used to play described fast advance and retreat video file.
Another purpose of the embodiment of the invention is to provide a kind of multimedia equipment that comprises the system of fast-forward and fast-backward browsing video.
In an embodiment of the present invention, the frame of video in the extraction source video file is according to the judgement to this frame of video, store key frame into fast advance and retreat video file,, generate key frame non-key frame recompile, store fast advance and retreat video file equally into, realized evenly browsing of the fast advance and retreat of many multiples.
Description of drawings
Fig. 1 is the realization flow figure of the method for the fast-forward and fast-backward browsing video that provides of first embodiment of the invention;
Fig. 2 is the realization flow figure of the method for the fast-forward and fast-backward browsing video that provides of second embodiment of the invention;
Fig. 3 is provide frame of video is encoded again of the embodiment of the invention, generates the realization flow figure of key frame;
Fig. 4 is the structured flowchart of the system of the fast-forward and fast-backward browsing video that provides of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
In an embodiment of the present invention, the frame of video in the extraction source video file according to the judgement to this frame of video, stores key frame into fast advance and retreat video file, to non-key frame recompile, generates key frame, stores fast advance and retreat video file equally into.
Fast advance and retreat in the embodiment of the invention are meant F.F. and/or rewind down, this not in order to the restriction the present invention.
Fig. 1 shows the realization flow of the method for the fast-forward and fast-backward browsing video that first embodiment of the invention provides, and its detailed step is as described below:
In step S101, in the extraction source video file with the frame of video of the corresponding equal difference of fast advance and retreat multiple position.
In embodiments of the present invention, according to fast advance and retreat multiple, definite position that needs the frame of video of extraction, promptly determine frame number equal difference position in the video file of source, for example: if fast advance and retreat multiple is 2, the video frame number that then needs to extract is respectively 1,11,21 ..., and extract the frame of video of equal difference position.
In step S102, whether the frame of video of the equal difference position of judge extracting is key frame, is execution in step S103 then, otherwise execution in step S105.
In embodiments of the present invention, the file that the source video file is made up of a series of key frame and non-key frame, key frame are can independent decoded video frames, and non-key frame is can not independent decoded video frames.In this embodiment, on size of data, the data of key frame are mostly much larger than non-key frame; Play in the demonstration from the data that read, key frame has corresponding picture data to show.
In step S103, store key frame into fast advance and retreat video file successively according to the order that extracts.
In embodiments of the present invention, if the frame of video of the equal difference position of extracting is a key frame, then this key frame is stored into the relevant position of fast advance and retreat video file according to the order that extracts, wherein, should fast advance and retreat video file be second video file that is independent of above-mentioned source video file, this video file of advancing and retreat soon be used to store extraction and a series of key frame corresponding equal difference of fast advance and retreat multiple position.
In step S104, play fast advance and retreat video file.
In step S105, frame of video is encoded again, generate key frame, return execution in step S103 simultaneously.
In embodiments of the present invention, to the frame of video recompile, generate key frame after, key frame is stored in the fast advance and retreat video file successively according to the extraction order of frame of video.
Fig. 2 shows the realization flow of the method for the fast-forward and fast-backward browsing video that second embodiment of the invention provides, and its detailed step is as described below:
In step S201, receive the fast-forward and fast-backward browsing instruction of input, wherein, this fast-forward and fast-backward browsing instruction carries fast advance and retreat multiple information.
In embodiments of the present invention, when need advancing and retreat soon to the current source video file of watching, the user checks when operation, input fast-forward and fast-backward browsing instruction on remote controller or relevant input equipment, promptly the user imports many multiples such as 2,4 or 8 data message of advancing and retreat soon on remote controller or corresponding input equipment.
In step S202, the frame of video of the corresponding equal difference of the fast advance and retreat multiple position of importing in advance with the user in the extraction source video file.
In embodiments of the present invention, fast advance and retreat multiple according to user's input, definite position that needs the frame of video of extraction, promptly determine frame number equal difference position in the video file of source, for example: if fast advance and retreat multiple is 2, the video frame number that then needs to extract is respectively 1,11,21 ..., and extract the frame of video of equal difference position.
In step S203, whether the frame of video of the equal difference position of judge extracting is key frame, is execution in step S204 then, otherwise execution in step S206.
In embodiments of the present invention, the file that the source video file is made up of a series of key frame and non-key frame, key frame are can independent decoded video frames, and non-key frame is can not independent decoded video frames.In this embodiment, on size of data, the data of key frame are much larger than non-key frame; Play in the demonstration from the data that read, key frame has corresponding picture data to show.
In step S204, store key frame into fast advance and retreat video file successively according to the order that extracts.
In embodiments of the present invention, if the frame of video of the equal difference position of extracting is a key frame, then this key frame is stored into the relevant position of fast advance and retreat video file according to the order that extracts, wherein, should fast advance and retreat video file be second video file that is independent of above-mentioned source video file, this video file of advancing and retreat soon be used to store a series of key frame extraction and the corresponding equal difference of fast advance and retreat multiple position input.
In step S205, play fast advance and retreat video file.
In step S206, frame of video is encoded again, generate key frame, return execution in step S204 simultaneously.
In embodiments of the present invention, to the frame of video recompile, generate key frame after, key frame is stored in the fast advance and retreat video file successively according to the extraction order of frame of video.
In embodiments of the present invention, above-mentioned second embodiment is described as generating accordingly according to the fast advance and retreat multiple of user's input the flow process of fast advance and retreat file, as specific embodiments of the invention, can be when system boot, advance and retreat the soon judgement of calling of video file, when this fast advance and retreat video file generates in advance, then directly calling broadcast gets final product, when storage should not advanced and retreat video file soon, the instant video file of to advance and retreat soon that generates, be the flow process that above-mentioned second embodiment describes, but not in order to restriction the present invention.
As one embodiment of the present of invention, Fig. 3 shows the embodiment of the invention provides frame of video is encoded again, generates the realization flow of key frame, and its detailed step is as described below:
In step S301, search the adjacent key frame of non-key frame with described equal difference position.
In step S302, non-key frame between the non-key frame of the non-key frame of equal difference position, the key frame adjacent with the non-key frame of equal difference position, equal difference position and the key frame adjacent with the non-key frame of equal difference position is decompressed respectively, and reduction generates the picture frame of equal difference position.
In step S303, the picture frame of equal difference position is compressed the generation key frame.
In embodiments of the present invention, the key frame adjacent with the non-key frame of equal difference position can be adjacent key frame before the non-key frame with the equal difference position, also can be adjacent key frame after the non-key frame with the equal difference position, at this not in order to restriction the present invention.
As a specific embodiment of the present invention, with fast advance and retreat multiple is 2 to be that example describes, if the equal difference position that should fast advance and retreat multiple corresponds on the frame number of source video file is 10, according to the said method flow process, the position of promptly extracting frame of video is not 1,11,21, ..., for example 1,4,13,20, ... the position is a key frame, other positions are non-key frame, then when extracting the frame of video of equal difference position 10, this frame of video is non-key frame, then according to above-mentioned realization flow, find out the key frame adjacent with the non-key frame of equal difference position 11, ascend the throne and be changed to 4 frame of video, then to key frame 4, non-key frame 5,6,7,8,9,10 decompress respectively, obtain the picture frame of equal difference position 11, then this picture frame is compressed the generation key frame, this frame is the key frame of equal difference position 11, then this key frame is stored into second position of fast advance and retreat video file, the extraction of other positions, deterministic process is similar, do not repeat them here, above-mentioned only is concrete an enforcement of the present invention, not in order to restriction the present invention.
Fig. 4 shows the structured flowchart of the system of the fast-forward and fast-backward browsing video that the embodiment of the invention provides, for convenience of explanation, only provided the part relevant with the embodiment of the invention among the figure, the system of fast-forward and fast-backward browsing video can be software unit, hardware cell or the software and hardware combining unit of built-in multimedia equipment.
In the frame of video extraction module 11 extraction source video files with the frame of video of the corresponding equal difference of fast advance and retreat multiple position; Judge module 12 judges whether the frame of video that frame of video extraction module 11 extracts is key frame; When judge module 12 judged that frame of video is non-key frame, 13 pairs of frame of video of recompile module were encoded again, generate key frame, and memory module 14 stores the key frame that recompile module 13 generates into fast advance and retreat video file simultaneously; When judge module 12 judged that frame of video is key frame, memory module 14 stored key frame into fast advance and retreat video file equally, and video file playing module 15 is play fast advance and retreat video file.
In embodiments of the present invention, search module 131 and search the key frame adjacent with the non-key frame of equal difference position; The non-key frame of 132 pairs of equal difference positions of decompression module, search the non-key frame of the adjacent key frame of module 131 non-key frames that search and the equal difference position, equal difference position and the non-key frame searched between the adjacent key frame of module 131 non-key frames that search and the equal difference position decompresses respectively, reduction generates the picture frame of described equal difference position; The picture frame of 133 pairs of equal difference positions of compression module compresses the generation key frame.
In embodiments of the present invention, the key frame adjacent with the non-key frame of equal difference position can be adjacent key frame before the non-key frame with the equal difference position, also can be adjacent key frame after the non-key frame with the equal difference position, at this not in order to restriction the present invention.
As an alternative embodiment of the invention, the system of fast-forward and fast-backward browsing video also comprises a command reception module 16, receive the fast-forward and fast-backward browsing instruction of input, wherein, this fast-forward and fast-backward browsing instruction carries fast advance and retreat multiple information, the fast-forward and fast-backward browsing that receives according to command reception module 16 instructs, carry out fast-forward and fast-backward browsing video, its detailed module is described as mentioned above, do not repeat them here, this module is the optional module of the system of fast-forward and fast-backward browsing video, and the above-mentioned fast advance and retreat video file that generates in advance also can directly call in system, but not in order to restriction the present invention.
In an embodiment of the present invention, the frame of video in the extraction source video file is according to the judgement to this frame of video, store key frame into fast advance and retreat video file,, generate key frame non-key frame recompile, store fast advance and retreat video file equally into, realized evenly browsing of the fast advance and retreat of many multiples.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, described program can be in being stored in a computer read/write memory medium, described storage medium is as ROM/RAM, disk, CD etc.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1, a kind of method of fast-forward and fast-backward browsing video is characterized in that, described method comprises the steps:
In the extraction source video file with the frame of video of the corresponding equal difference of fast advance and retreat multiple position;
Judge whether described frame of video is key frame, if, then key frame is stored into fast advance and retreat video file, otherwise, described frame of video is encoded again, generate key frame, and store the key frame that generates into described fast advance and retreat video file;
Play described fast advance and retreat video file.
2, the method for claim 1 is characterized in that, also comprises the steps: in the described extraction source video file and before the step of the frame of video of the corresponding equal difference of fast advance and retreat multiple position
Receive the fast-forward and fast-backward browsing instruction of input, described fast-forward and fast-backward browsing instruction carries fast advance and retreat multiple information.
3, the method for claim 1 is characterized in that, described described frame of video is encoded again, and the step that generates key frame specifically comprises the steps:
Search the adjacent key frame of non-key frame with described equal difference position;
Non-key frame between the non-key frame of the non-key frame of described equal difference position, the key frame adjacent with the non-key frame of described equal difference position, described equal difference position and the key frame adjacent with the non-key frame of described equal difference position is decompressed respectively, and reduction generates the picture frame of described equal difference position;
Picture frame to described equal difference position compresses the generation key frame.
4, method as claimed in claim 3, it is characterized in that, the key frame that the non-key frame of described and described equal difference position is adjacent is an adjacent key frame before the non-key frame with described equal difference position, or, with adjacent key frame after the non-key frame of described equal difference position.
5, a kind of system of fast-forward and fast-backward browsing video is characterized in that, described system comprises:
The frame of video extraction module is used for the extraction source video file and the frame of video of the corresponding equal difference of the multiple position of advancing and retreat soon;
Judge module is used to judge whether described frame of video is key frame;
The recompile module is used for when described judge module judges that described frame of video is non-key frame described frame of video being encoded again, generates key frame;
Memory module is used for that described judge module is judged as the frame of video of key frame and the key frame of described recompile module generation stores fast advance and retreat video file into; And
The video file playing module is used to play described fast advance and retreat video file.
6, system as claimed in claim 5 is characterized in that, described system also comprises:
The command reception module is used to receive the fast-forward and fast-backward browsing instruction of input, and described fast-forward and fast-backward browsing instruction carries fast advance and retreat multiple information.
7, system as claimed in claim 5 is characterized in that, described recompile module specifically comprises:
Search module, be used to search the adjacent key frame of non-key frame with described equal difference position;
Decompression module, be used for the non-key frame of the non-key frame to described equal difference position, the key frame adjacent with the non-key frame of described equal difference position, described equal difference position and the non-key frame between the key frame adjacent with the non-key frame of described equal difference position and decompress respectively, reduction generates the picture frame of described equal difference position; And
Compression module is used for the picture frame of described equal difference position is compressed the generation key frame.
8, system as claimed in claim 7, it is characterized in that, the key frame that the non-key frame of described and described equal difference position is adjacent is an adjacent key frame before the non-key frame with described equal difference position, or, with adjacent key frame after the non-key frame of described equal difference position.
9, a kind of multimedia equipment that comprises the system of each described fast-forward and fast-backward browsing video of claim 5 to 8.
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| CN102447868A (en) * | 2010-10-11 | 2012-05-09 | 扬智电子（上海）有限公司 | Video stream fast playing method |
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| CN104980808A (en) * | 2015-07-06 | 2015-10-14 | 无锡天脉聚源传媒科技有限公司 | Method and device for accurately dotting video resources |
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| CN102447868A (en) * | 2010-10-11 | 2012-05-09 | 扬智电子（上海）有限公司 | Video stream fast playing method |
| CN102447868B (en) * | 2010-10-11 | 2013-11-06 | 扬智电子科技(上海)有限公司 | Video stream fast playing method |
| CN102879660A (en) * | 2011-07-11 | 2013-01-16 | 富泰华工业（深圳）有限公司 | Device and method for testing electronic product |
| CN102879660B (en) * | 2011-07-11 | 2016-08-31 | 富泰华工业（深圳）有限公司 | Electronic product test device and method |
| CN103024561A (en) * | 2011-09-28 | 2013-04-03 | 深圳市快播科技有限公司 | Method and device for displaying dragging progress bar |
| CN103024561B (en) * | 2011-09-28 | 2016-05-25 | 深圳市快播科技有限公司 | A kind of display methods and device that pulls progress bar |
| CN103428213A (en) * | 2013-08-08 | 2013-12-04 | 深圳市同洲电子股份有限公司 | Multi-media file generation method and multi-media device |
| CN105306973A (en) * | 2014-07-14 | 2016-02-03 | 中国科学院声学研究所 | Method for generating multiplied-speed video file |
| CN105376658A (en) * | 2014-08-26 | 2016-03-02 | 无锡天脉聚源传媒科技有限公司 | Device and method for generating video file overview |
| CN104980808A (en) * | 2015-07-06 | 2015-10-14 | 无锡天脉聚源传媒科技有限公司 | Method and device for accurately dotting video resources |
| CN107277625A (en) * | 2017-07-31 | 2017-10-20 | 上海爱优威软件开发有限公司 | A kind of management method and system of video playback history |
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