CN102905102A - Screen capturing video player and screen capturing method - Google Patents
Screen capturing video player and screen capturing method Download PDFInfo
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- CN102905102A CN102905102A CN2012103672779A CN201210367277A CN102905102A CN 102905102 A CN102905102 A CN 102905102A CN 2012103672779 A CN2012103672779 A CN 2012103672779A CN 201210367277 A CN201210367277 A CN 201210367277A CN 102905102 A CN102905102 A CN 102905102A
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Abstract
The invention discloses a screen capturing video player and a screen capturing method. The player comprises a screen capturing control module, a video broadcasting caching module, a conversion module and a picture display module. The screen capturing control module is used for receiving a screen capturing instruction, wherein the screen capturing instruction contains screen capturing times; the video broadcasting caching module is used for caching video data in preset periods of time before and after each screen capturing time according to the screen capturing instruction; the conversion module is used for converting the cached video data into picture data; and the picture display module is used for displaying the picture data on a screen in a picture form. According to the player and the screen capturing method, special key menus can be continuously captured from a video image, and then can be converted into pictures, and thus, the efficient, rapid, accurate and clear capturing of special menus is realized.
Description
Technical field
The present invention relates to a kind of grabgraf video player and grabgraf method, especially a kind of video player and grabgraf method that relates to crime picture grabgraf in the public safety field public security Reconnaissance system.
Background technology
Continuous quickening along with national safe city construction, in order to guarantee the people's the security of the lives and property, in social public arena and particular place that the video monitoring camera is installed is more and more universal, the front end camera that is installed in everywhere can be taken special scenes as required in real time, and video data transmitting stored and subsequent treatment to Back Administration Module (server), administrative staff or law enfrocement official can have access to and analyze these video datas according to actual needs.
In recent years, because monitoring camera is universal, having access to the monitor video data analysis has become a kind of important means that the law enfrocement official solves a case.Yet, because process of commission of crime often occurs in a flash, and the law enfrocement official need to grasp some key picture in the view procedure of video image, carries out the preservation of evidence, perhaps adopt the software of specialty that the key picture that grasps is further analyzed, carry out the detection of case.
Summary of the invention
The features and advantages of the present invention are partly statement in the following description, perhaps can describe obviously from this, perhaps can learn by putting into practice the present invention.
Technical problem to be solved by this invention is: the specific key picture of crawl from continuous video image, then be transformed into picture, realize to specific picture efficiently, fast, precisely, clearly crawl.
In order to solve the problems of the technologies described above, the invention provides a kind of grabgraf video player, this player comprises following part at least:
The grabgraf control module is used for receiving the grabgraf instruction, and wherein, the grabgraf instruction comprises the time point of grabgraf;
The video playback buffer module, be used for buffer-stored according to the grabgraf instruction to the video data in the front and back Preset Time section of the time point of grabgraf;
Modular converter is used for converting the video data of buffer-stored to image data;
The Image Display module is used for the form of image data with picture shown at screen;
Further, the grabgraf instruction instruction that also comprises the quantity that needs grabgraf, the picture that grasps is screened.
Preferably, the front and back Preset Time section of the time point of grabgraf is the time period of N second to the time point of grabgraf M second before the time point of grabgraf, and M, N are constant, and the value of M, N is default by player.
Preferably, converting the video data of described buffer-stored to image data is by the video data in the Preset Time section being changed frame by frame or every the frame conversion, the mode that per second generates the X pictures realizes that wherein X is positive integer, and picture number is less than frame per second.
Preferably, the grabgraf control module also is used for the screening image data; The Image Display module also is used for showing the image data after screening.
Preferably, video player also comprises the picture storage module for store picture data.
Based on above-mentioned player, the present invention also provides a kind of grabgraf method, and the method comprises:
Player receives the grabgraf instruction in video display process, and wherein, the grabgraf instruction comprises the time point of grabgraf;
The video playback buffer module is carried out buffer-stored according to the grabgraf instruction to the video data in the front and back Preset Time section of the time point of grabgraf;
Modular converter converts the video data of buffer-stored to image data;
The Image Display module shows the form of image data with picture at screen.
Preferably, the front and back Preset Time section of the time point of grabgraf is the time period of N second to the time point of grabgraf M second before the time point of grabgraf, and M, N are constant, and the value of M, N is default by player.
Preferably, the step that converts the video data of described buffer-stored to image data is by the video data in the Preset Time section being changed frame by frame or being realized every the mode of frame conversion, the mode that per second generates the X pictures realizes that wherein X is positive integer, and picture number is less than frame per second.
Preferably, image data is shown at screen with the form of picture is that order according to time order and function shows to the Image Display module.
Preferably, the method also comprises: the grabgraf control module is screened the picture that the order according to time order and function shows; The Image Display module shows the picture after the screening.
By above technical scheme, realized well from continuous video image, grasping the purpose that specific key picture is transformed into picture, by the continuous grabgraf to time point surrounding time at certain at crucial moment, form continuous picture, and the displaying by many pictures, aspect operating personnel obtain the convenient of key picture.Simultaneously, because when frame is changed or is changed frame by frame, per second generates X and opens (for example: 10,25 or 30) picture, so that grabgraf efficient is high, the user can select more to meet the picture of customer requirements in institute's grabgraf sheet sequence, possessing higher intelligent and user experiences, in addition, owing to adopted buffer technology, in the grabgraf process, each adjacent frame data are related the utilization fully, so that the picture clarity of grabbing is higher.
By reading specification, those of ordinary skills will understand feature and the content of these technical schemes better.
Description of drawings
Below by describing particularly the present invention with reference to the accompanying drawings and in conjunction with example, advantage of the present invention and implementation will be more obvious, wherein content shown in the accompanying drawing only is used for explanation of the present invention, and does not consist of the restriction of going up in all senses of the present invention, in the accompanying drawings:
Fig. 1 is player theory diagram of the present invention;
Fig. 2 is the grabgraf method flow diagram based on this player.
Embodiment
As shown in Figure 1, grabgraf video player of the present invention mainly comprises grabgraf control module 101, video playback buffer module 102, modular converter 103 and Image Display module 104.
Video playback buffer module 102 is used for the interior video data of front and back Preset Time section of the time point of storage grabgraf.
As preferred embodiment, this player also should comprise the picture storage module of the picture of catching for storage.
As preferred embodiment, the grabgraf instruction that operating personnel assign comprises: to player assign grabgraf time point, need the quantity of grabgraf and the instruction that the picture that grasps is screened.
Realization with the method that the video data of buffer-stored converts image data to is: the video data in the Preset Time section is carried out every frame conversion or frame by frame conversion, and the mode that per second generates the X pictures realizes that wherein X is positive integer, and picture number is less than frame per second.Better experience is that per second generates 10,25,30 pictures.Because the quantity of grabgraf is to grasp according to default value, if will grasp 50 pictures 2 seconds, frame per second is that 25 video flowing just requires every frame conversion so.In addition, frame of video is converted to the process of picture, in simple terms, the data with video file cushion exactly, then video requency frame data are decoded into yuv data, yuv data are converted to the JPG form again.
As preferred embodiment, the time period of the front and back Preset Time section of the time point of grabgraf is specially M before the time point of grabgraf second to the time point of grabgraf N second, M, N is constant, M, the value of N is default by player, such as front 2 seconds of the time point of grabgraf to playing constantly rear 1 second, that is to say, player is at the time point of grabgraf, the video playback buffer module of player will will advance buffer area with the front M second of the time point of this grabgraf of the video data of N second behind the time point of grabgraf at least, think that video converts picture to initial data is provided, such as, according to upper example, the grabgraf command request carries out grabgraf in the 20th second moment of displaying video, and then player needs the 18th second to the 21st second the data of video playback time are carried out buffer memory at least.
This player can be realized man-machine interaction by grabgraf control module 103, assigns relevant grabgraf instruction, can by autonomous time that need to select grabgraf of the mode of pulling slider bar, realize the more accurately extraction grabgraf of key picture.
What need to further specify is, this player not only can use on general client computer, can also use at the smart mobile phone of Android operating system and uses on the iphone or ipad of IOS operating system.
Carry out grabgraf by this player, can realize from continuous video image the specific key picture of crawl, then be transformed into picture, realize to specific picture efficiently, fast, precisely, clearly crawl.
The present invention also discloses and a kind ofly adopts above-mentioned player and carry out the method for grabgraf, and when adopting this player to carry out displaying video, operating personnel as required, interactive interface by this player, assign the grabgraf instruction to player, as shown in Figure 2, this grabgraf method specifically comprises:
Wherein, in step 201, which the grabgraf instruction that the grabgraf control module is assigned will be included at least and constantly carry out grabgraf (being the time point of grabgraf), need to grab several pictures, and institute's grabgraf sheet screened, in a preferred embodiment, can also comprise the instruction of institute's grabgraf sheet being pruned the senior processing such as editor.
The time period of mainly refer to M before the time point of grabgraf second before and after the time point of the grabgraf described in step 202 in the Preset Time section to the time point of grabgraf N second, M, N is constant, M, the value of N is default by player, such as front 1 second of the time point of grabgraf to playing constantly rear 2 seconds, that is to say, player is at the time point of grabgraf, the video playback buffer module of player will will advance buffer area with the front M second of the time point of this grabgraf of the video data of N second behind the time point of grabgraf at least, think that video converts picture to initial data is provided, such as, according to upper example, the grabgraf command request carries out grabgraf in 20 seconds moment of displaying video, and then player needs the 19th second to the 22nd second the data of video playback time are carried out buffer memory at least.The buffer-stored process of step 202, abundant related utilization of adjacent each frame data in the time of can making grabgraf is so that the picture of grabbing is level and smooth and definition is higher.
The process that video data is converted to image data described in step 203, convert the video data of the time period of N second to the time point of grabgraf the front M of time point second of grabgraf that buffer-stored is good to grabgraf instruction desired image data, frame of video is converted to the process of picture, that data with video file cushion, then video requency frame data is decoded into yuv data, again yuv data is converted to the JPG form.
In the Image Display process of step 204, after step 203 grabs required picture, all pictures are arranged demonstration according to the sequencing of time.Operating personnel can screen operation by 101 pairs of pictures that show according to the order of time order and function of grabgraf control module, and selection needs, and deletes unwanted picture.At last by the picture after the Image Display module demonstration screening.
Use and advantage for grabgraf method of the present invention is described better are further detailed for following special scenes.
Suppose that certain public security officer need to carry out grabgraf for certain section video, at first, opening this section video file by player plays, and configuration crawl 30 pictures, when being played to 1:05 in the time of second, the public security officer finds to occur the key picture of suspect's criminal offence, and the grabgraf control module that the public security officer can be by player is sent the grabgraf instruction at 1:05 and carry out the grabgraf action second; Player will be data cached according to systemic presupposition rule in video data from 1:04 second to 1:06 second carry out every the frame conversion, per second generates 10 pictures.Then player is showed 30 pictures successively according to time order and function; The public security officer can select as required wherein can show that 2 pictures of criminal offence are as evidence; Player is deleted all the other 28 pictures automatically.
By the grabgraf method that this player is realized, can realize from continuous video image the specific key picture of crawl, then be transformed into picture, realize to specific picture efficiently, fast, precisely, clearly crawl.
More than with reference to the accompanying drawings of the preferred embodiments of the present invention, those skilled in the art do not depart from the scope and spirit of the present invention, and can have multiple flexible program to realize the present invention.For example, the feature that illustrates or describe as the part of an embodiment can be used for another embodiment to obtain another embodiment.Below only for the better feasible embodiment of the present invention, be not so limit to interest field of the present invention, the equivalence that all utilizations specification of the present invention and accompanying drawing content are done changes, and all is contained within the interest field of the present invention.
Claims (11)
1. a grabgraf video player is characterized in that, comprising:
The grabgraf control module is used for receiving the grabgraf instruction, and wherein, described grabgraf instruction comprises the time point of grabgraf;
The video playback buffer module, be used for buffer-stored according to the grabgraf instruction to the video data in the front and back Preset Time section of the time point of grabgraf;
Modular converter is used for converting the video data of described buffer-stored to image data;
The Image Display module is used for the form of described image data with picture shown at screen.
2. grabgraf video player according to claim 1 is characterized in that, the instruction that described grabgraf instruction also comprises the quantity that needs grabgraf, the picture that grasps is screened.
3. grabgraf video player according to claim 1, it is characterized in that, the time period of the front and back Preset Time section of the time point of described grabgraf is the front M of time point second of described grabgraf to the time point of described grabgraf N second, M, N are constant, and the value of M, N is default by player.
4. grabgraf video player according to claim 1, it is characterized in that, it is by the video data in the described Preset Time section is changed frame by frame or changed every frame that described video data with described buffer-stored converts image data to, the mode that per second generates the X pictures realizes, wherein X is positive integer, and picture number is less than frame per second.
5. grabgraf video player according to claim 1 is characterized in that, described grabgraf control module also is used for screening described image data; Described Image Display module also is used for showing the image data after screening.
6. grabgraf video player according to claim 1 is characterized in that, also comprises be used to the picture storage module of storing described image data.
7. a grabgraf method is characterized in that, comprising:
Player receives the grabgraf instruction in video display process, and wherein, described grabgraf instruction comprises the time point of grabgraf;
The video playback buffer module is carried out buffer-stored according to the grabgraf instruction to the video data in the front and back Preset Time section of the time point of grabgraf;
Modular converter converts the video data of described buffer-stored to image data;
The Image Display module shows the form of described image data with picture at screen.
8. grabgraf method according to claim 7, it is characterized in that, the time period of the front and back Preset Time section of the time point of described grabgraf is the front M of time point second of described grabgraf to the time point of described grabgraf N second, M, N are constant, and the value of M, N is default by player.
9. grabgraf method according to claim 7, it is characterized in that, the step that converts the video data of described buffer-stored to image data is by the video data in the described Preset Time section being changed frame by frame or being realized every the mode of frame conversion, the mode that per second generates the X pictures realizes, wherein X is positive integer, and picture number is less than frame per second.
10. grabgraf method according to claim 7 is characterized in that, described Image Display module shows with the form of picture described image data at screen be that order according to time order and function shows.
11. grabgraf method according to claim 10 is characterized in that, described method also comprises:
Described grabgraf control module is screened the picture that the order according to time order and function shows;
Described Image Display module shows the picture after the screening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103672779A CN102905102A (en) | 2012-09-27 | 2012-09-27 | Screen capturing video player and screen capturing method |
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| CN2012103672779A CN102905102A (en) | 2012-09-27 | 2012-09-27 | Screen capturing video player and screen capturing method |
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Cited By (8)
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| CN103974146A (en) * | 2014-05-30 | 2014-08-06 | 深圳市同洲电子股份有限公司 | Video processing method, client and system |
| CN104540004A (en) * | 2015-01-27 | 2015-04-22 | 深圳市中兴移动通信有限公司 | Video screenshot method and video screenshot device |
| CN105791952A (en) * | 2016-03-02 | 2016-07-20 | 传线网络科技（上海）有限公司 | Screen shooting method and device for streaming media video data, and electronic device |
| CN105912704A (en) * | 2016-04-27 | 2016-08-31 | 努比亚技术有限公司 | Picture retrieval method and device |
| CN106817354A (en) * | 2015-12-01 | 2017-06-09 | 阿里巴巴集团控股有限公司 | A kind of video stream transmission method, equipment and system |
| CN111950413A (en) * | 2020-07-31 | 2020-11-17 | 广州微林软件有限公司 | Video identification processing method for grabbed objects |
| CN112437279A (en) * | 2020-11-23 | 2021-03-02 | 方战领 | Video analysis method and device |
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| CN105912704A (en) * | 2016-04-27 | 2016-08-31 | 努比亚技术有限公司 | Picture retrieval method and device |
| CN105912704B (en) * | 2016-04-27 | 2020-05-05 | 北京慧辰资道资讯股份有限公司 | Picture screening method and device |
| CN111950413A (en) * | 2020-07-31 | 2020-11-17 | 广州微林软件有限公司 | Video identification processing method for grabbed objects |
| CN112437279A (en) * | 2020-11-23 | 2021-03-02 | 方战领 | Video analysis method and device |
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Owner name: HANGZHOU SKYVISION INTELLIGENCE SYSTEM CO., LTD. Free format text: FORMER OWNER: CSST E-CITY TECHNOLOGY (CHINA) CO., LTD. Effective date: 20150129 Free format text: FORMER OWNER: HANGZHOU SKYVISION INTELLIGENCE SYSTEM CO., LTD. Effective date: 20150129 |
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Effective date of registration: 20150129 Address after: Hangzhou City, Zhejiang province 310014 Xihu District 212 Moganshan Road Zoomlion Building 2 room 1401-1405 Applicant after: Hangzhou Skyvision Intelligence System Co., Ltd. Address before: 518034 Guangdong province Shenzhen city Futian District District Shennan Road Press Plaza room 1306 Applicant before: Anke Smart Cities Technolongy (PRC) Co., Ltd. Applicant before: Hangzhou Skyvision Intelligence System Co., Ltd. |
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Application publication date: 20130130 |