CN102932619A - Method for browsing video rapidly - Google Patents
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- CN102932619A CN102932619A CN2012104392633A CN201210439263A CN102932619A CN 102932619 A CN102932619 A CN 102932619A CN 2012104392633 A CN2012104392633 A CN 2012104392633A CN 201210439263 A CN201210439263 A CN 201210439263A CN 102932619 A CN102932619 A CN 102932619A
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Abstract
The invention relates to a method for browsing a video rapidly and is used in a video device. The video comprises a plurality of groups of data frames which at least comprise video frames including key frames and compensation frames. The method includes confirming a first time point according to a user choice, wherein the first time point is a time point of the video which a user chooses to brows; locating the position of a first data frame in the plurality of the groups of the data frames according to the first time point, wherein the first data frame is a data frame in the video corresponding to the first time point; reading a first number key frame behind the first data frame in a first buffering area; and playing the key frame in the first buffering area. The method can respond to user choices timely and load key frames which users take interests in, the real-time experience is good, and video browsing can be operated effectively.
Description
Technical field
The present invention relates to multimedia technology field, more particularly, relate to a kind of method of fast browsing video recording.
Background technology
In occasions such as video monitorings, the user often need to browse to search interested content in the video record of mass data, even the data of browsing all are positioned at local side, and this demand that also is difficult to the real-time response user of browsing.
When the user changed the progress of video recording broadcast by dragging the operations such as slip hurdle, the buffering of player customization needed first unloading, a large amount of video requency frame data of rear loading, thereby makes user's selection can't obtain timely feedback; And the improvement that relies on merely hardware device can not be avoided the generation of this situation on the one hand fully, can produce too high cost on the other hand.
The method of therefore, seeking the video recording of a kind of fast browsing is the technical issues that need to address of the present invention.
Summary of the invention
The object of the present invention is to provide a kind of method of browsing video recording, its can be in time in response to user's selection, and load the frame of video that the user need to browse.
For achieving the above object, technical scheme of the present invention is as follows:
A kind of method of fast browsing video recording, be used for a recording apparatus, video recording comprises the multi-group data frame, Frame comprises frame of video at least, frame of video is divided into key frame and compensated frame, the method comprises the steps: a), determines very first time point according to user's selection, the video time point that very first time point is browsed for user selection; B), put the position of in the multi-group data frame, locating the first Frame, the Frame of the first Frame for putting corresponding to the very first time in the video recording according to the very first time; C), the adjacent key frame of the first number after the first Frame is read in the first buffering area, the first buffering area is that recording apparatus is browsed the buffering area that video recording distributes for the user; D), the key frame in broadcast the first buffering area.
Preferably, step a) specifically comprises: the user selects very first time point by dragging a slider bar, and the position that recording apparatus detects a slider bar every very first time interval is to redefine very first time point, and very first time interval is not higher than 0.2 second.
Alternatively, the head of video recording has a frame index, and Frame has unique numbering, and frame index is for the numbering of determining uniquely according to a video time point corresponding to the Frame of this video time point; Step b) specifically comprises: obtaining the numbering of the first Frame, and locate the position of the first Frame according to the numbering of the first Frame according to very first time point inquiry frame index.
Alternatively, each Frame is with a timestamp, and timestamp identifies this Frame corresponding to unique time point of video recording; Step b) specifically comprises: determine very first time stamp according to very first time point, and locate the position of the first Frame according to very first time stamp.
Preferably, Frame is encoded with a coded format, steps d) specifically comprise: d1), the key frame in the first buffering area is decoded; D2), the key frame in broadcast the first buffering area.
The method of fast browsing provided by the invention video recording, can be in time in response to user's selection, in time load the interested key frame of user, on the one hand, make the experience of its real-time better, on the other hand, make browsing and can carry out more efficiently video recording.
Description of drawings
Fig. 1 illustrates the schematic flow sheet of method of the fast browsing video recording of one embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Need to prove that the method for browsing video recording that the embodiment of the invention provides is used for browsing at local side the video recording of a recording apparatus.Video recording is comprised of the multi-group data frame, and Frame comprises frame of video at least; Frame of video can be divided into key frame and compensated frame according to factors such as importance.
As shown in Figure 1, the method for the fast browsing video recording that one embodiment of the invention provides comprises the steps:
Step S10, determine very first time point according to user's selection, the video time point that very first time point is browsed for user selection.
Particularly, the user can be by dragging a slider bar or clicking the selected time period of recording a video and select very first time point.
For in time in response to user's selection, in this embodiment, recording apparatus detects the position of a slider bar or detects the user and click selected video time section every very first time interval, wants the video recording Frame browsed in order in time load it within user's acceptable time.
Under the preferable case, very first time interval is not higher than 0.2 second.
Step S11, according to the position of very first time point location the first Frame, the first Frame in the video recording corresponding to the Frame of very first time point.
Particularly, the very first time point of selecting according to the user is located the position of the first Frame in the multi-group data frame.
According to a kind of embodiment of this step S11, the head of video recording has a frame index, records the one-to-one relationship of video time point and Frame numbering in the frame index; And each Frame has unique numbering, can locate the position of this Frame in the multi-group data frame that forms video recording by the Frame numbering.In this step S11, can determine uniquely the numbering of the first Frame according to very first time point by this frame index, and then can locate the position of the first Frame in the multi-group data frame that forms video recording.
According to another embodiment of this step S11, with unique timestamp, timestamp identifies this Frame corresponding to unique time point of video recording in each Frame.This step S11 specifically comprises: determine uniquely very first time stamp according to very first time point, can locate the position of the first Frame in the multi-group data frame that forms video recording according to very first time stamp again.
Step S12, the adjacent key frame of the first number after the first Frame is read in the first buffering area.
Particularly, the buffering area of the first buffering area for when local side is play video recording or browsed video recording, distributing in this recording apparatus, in this step, only the adjacent key frame with the first number after the first Frame reads in the first buffering area for playing or browsing, and ignore compensated frame, when thereby user selection is browsed video recording, only see the key frame data that it comprises.
Usually, when adopting pal format to carry out image, can record lower 25 Frames 1 second, thereby video recording can comprise the Frame of magnanimity, but concerning the user who browses video recording, often only wherein the small part Frame be that the user is interested, and most Frame to be content approach, can not bring the information that needs to the user, thereby can be key frame and compensated frame with data frame dividing according to importance or other factors of Frame.
In this step S12, only key frame is read in the first buffering area.On the one hand, the user is by being enough to catch its interested video information to browsing of key frame; On the other hand, the way of only playing key frame can be accelerated to browse the speed of video recording, also can in time respond the user to the selection of very first time point.
According to a kind of embodiment of this step S12, key frame is the relative larger frame of former frame variation of image grayscale in the frame of video, and compensated frame is the relative less frame of former frame variation of image grayscale in the frame of video.
Further, can be with the variance of respective pixel gray scale in pixel grey scale and the former frame image with greater than the Frame definition key frame of a threshold value, be defined as compensated frame with the variance of respective pixel gray scale in pixel grey scale and the former frame image with less than the Frame of this threshold value.Wherein, the concrete numerical value of threshold value will be determined according to the number of image pixel, the average rank of grey scale pixel value.Best, the ratio of determining key frame and compensated frame is 1: 4 to 1: 9.
If video recording is for colored, the gray scale of pixel can be calculated by the value of red component, green component and the blue component of pixel.
According to another embodiment of this step S12, have between two key frames of arbitrary neighborhood one regular time the interval.Thereby according to this time interval, can filter out key frame from the multi-group data frame of video recording, remaining is compensated frame.
Further, frame of video adopts pal format, and the time interval of key frame is 1/5 second.
Key frame in step S13, broadcast the first buffering area.
This step can be behind user selection very first time point, plays out in the short period of time the very first time to put corresponding user and want the Frame browsed.
The method of the fast browsing video recording that this embodiment provides, can be in time in response to user's selection, in time load the interested key frame of user, for user's rapid extraction video information wherein, on the one hand, make the experience of its real-time better, on the other hand, make browsing and to carry out more efficiently video recording.
According to the optimization execution mode of this embodiment, the Frame in the video recording is encoded with a kind of coded format, can reduce the shared memory space of video recording, be beneficial to network and transmit simultaneously.In the step S13 of this embodiment, particularly, first the key frame in the first buffering area is decoded, then play.
Further, the coded format of video recording Frame is H.264 coded format or MPEG-4 coded format.
Further, according to embodiments of the invention, in step S12, read in the number of the Frame that the first number of the adjacent key frame of the first buffering area can hold for the first buffering area, also can rule of thumb be worth setting by the user.
Further, the recording apparatus among the present invention is the network video machine, and it can be monitored, record a video the other end and by the lower Frame of Internet Transmission record, video recording is stored in the local side of this network video machine by network, can supply user selection browse.
Above-described only is the preferred embodiments of the present invention; described embodiment limits scope of patent protection of the present invention; therefore the equivalent structure done of every utilization specification of the present invention and accompanying drawing content changes, and in like manner all should be included in protection scope of the present invention.
Claims (12)
1. the method for a fast browsing video recording is used for a recording apparatus, and described video recording comprises the multi-group data frame, and described Frame comprises frame of video at least, and described frame of video is divided into key frame and compensated frame, and described method comprises the steps:
A), determine very first time point according to user's selection, the video time point that described very first time point is browsed for described user selection;
B), according to the position of described very first time point location first Frame in described multi-group data frame, described the first Frame is corresponding to the Frame of described very first time point in the described video recording;
C), the adjacent described key frame of the first number after described the first Frame is read in the first buffering area, described the first buffering area is the described recording apparatus buffering area that described video recording distributes for the user browses;
D), the described key frame in described the first buffering area of broadcast.
2. the method for claim 1, it is characterized in that, described step a) specifically comprises: described user selects described very first time point by dragging a slider bar, the position that described recording apparatus detects once described slider bar every very first time interval is to redefine described very first time point, and described very first time interval is not higher than 0.2 second.
3. the method for claim 1, it is characterized in that, the head of described video recording has a frame index, and described Frame has unique numbering, and described frame index is for the numbering of determining uniquely according to a video time point corresponding to the described Frame of this video time point; Described step b) specifically comprises: obtaining the numbering of described the first Frame, and locate the position of described the first Frame according to the numbering of described the first Frame according to the described frame index of described very first time point inquiry.
4. the method for claim 1 is characterized in that, each described Frame is with a timestamp, and described timestamp identifies this Frame corresponding to unique time point of described video recording; Described step b) specifically comprises: determine very first time stamp according to described very first time point, and locate the position of described the first Frame according to described very first time stamp.
5. the method for claim 1 is characterized in that, described Frame is encoded with a coded format, described steps d) specifically comprise:
D1), the described key frame in described the first buffering area is decoded;
D2), the described key frame in described the first buffering area of broadcast.
6. method as claimed in claim 5 is characterized in that, described coded format is H.264 coded format or MPEG-4 coded format.
7. the method for claim 1 is characterized in that, described the first number is determined in following any mode:
The number of the described Frame that described the first buffering area can hold;
Described the first number rule of thumb is worth setting by the user.
8. such as each described method in the claim 1 to 7, it is characterized in that, described key frame is the relative larger frame of former frame variation of image grayscale in the described frame of video, and described compensated frame is the relative less frame of former frame variation of image grayscale in the described frame of video.
9. method as claimed in claim 8, it is characterized in that, the variance of respective pixel gray scale and greater than a threshold value in pixel grey scale and the former frame image in the described key frame, the variance of respective pixel gray scale and less than this threshold value in pixel grey scale and the former frame image in the described compensated frame.
10. such as each described method in the claim 1 to 7, it is characterized in that, have between two described key frames of arbitrary neighborhood one regular time the interval.
11. method as claimed in claim 10 is characterized in that, described frame of video adopts pal format, and the described time interval is 1/5 second.
12. such as each described method in the claim 1 to 7, it is characterized in that, described recording apparatus is the network video machine, described video recording is stored in described network video local side.
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| CN2012104392633A CN102932619A (en) | 2012-11-07 | 2012-11-07 | Method for browsing video rapidly |
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| CN2012104392633A CN102932619A (en) | 2012-11-07 | 2012-11-07 | Method for browsing video rapidly |
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Cited By (4)
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| CN104980791A (en) * | 2014-04-08 | 2015-10-14 | 腾讯科技（北京）有限公司 | Method and device for performing filter processing on video |
| CN105872606A (en) * | 2016-06-17 | 2016-08-17 | 努比亚技术有限公司 | Video positioning method and device |
| CN106657856A (en) * | 2016-06-22 | 2017-05-10 | 梅维泉 | Video positioning method based on temperature value |
| US9799376B2 (en) | 2014-09-17 | 2017-10-24 | Xiaomi Inc. | Method and device for video browsing based on keyframe |
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| CN102006500A (en) * | 2010-10-29 | 2011-04-06 | 蓝汛网络科技（北京）有限公司 | Video dragging method and device applied to cache server |
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| CN1762022A (en) * | 2003-03-20 | 2006-04-19 | 皇家飞利浦电子股份有限公司 | Cpi data for steam buffer channels |
| CN101106637A (en) * | 2006-07-13 | 2008-01-16 | 中兴通讯股份有限公司 | Method for playing media files in external storage device via STB |
| CN101076111A (en) * | 2006-11-15 | 2007-11-21 | 腾讯科技（深圳）有限公司 | Method for acquiring keyframe section positioning infromation in video fluid |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104980791A (en) * | 2014-04-08 | 2015-10-14 | 腾讯科技（北京）有限公司 | Method and device for performing filter processing on video |
| US9799376B2 (en) | 2014-09-17 | 2017-10-24 | Xiaomi Inc. | Method and device for video browsing based on keyframe |
| CN105872606A (en) * | 2016-06-17 | 2016-08-17 | 努比亚技术有限公司 | Video positioning method and device |
| CN105872606B (en) * | 2016-06-17 | 2019-01-08 | 努比亚技术有限公司 | Video locating method and device |
| CN106657856A (en) * | 2016-06-22 | 2017-05-10 | 梅维泉 | Video positioning method based on temperature value |
| CN106657856B (en) * | 2016-06-22 | 2019-09-03 | 梅维泉 | Video recording localization method based on temperature value |
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Application publication date: 20130213 |