CN101957752B - FLASH video previewing method and system thereof, and FLASH player - Google Patents
FLASH video previewing method and system thereof, and FLASH player Download PDFInfo
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Abstract
The invention provides a FLASH video previewing method and a system thereof, and a FLASH player. The FLASH video previewing method comprises the following steps of calculating a previewing time point according to the position of a mouse positioned on a playing progress bar; obtaining the corresponding previewing video data according to the previewing time point; and establishing a Video object to load the previewing video data and playing the video picture corresponding to the previewing time point in the previewing video data in a previewing window. In the FLASH video previewing method, the previewing time point of users is judged according to the position of the mouse on the playing progress bar to generate the corresponding video previewing graph so as to be convenient for the users to preview other part content in the course of playing a FLASH video; the FLASH video playing function can be perfected; the video playing function can be enriched; and the user experience can be enhanced.
Description
Technical field
The present invention relates to FLASH video playback technical field, relate in particular to a kind of FLASH video previewing method, a kind of FLASH video preview system.
Background technology
Along with the development of computer technology, Internet video is play has become one of Main Means of providing advice internet, and a large amount of video playback website has been emerged in large numbers in the whole world, as the youtube.com of the U.S. and Chinese 56.com.In these websites, nearly all adopt FLASH video playback technology.FLASH video playback technology is to be developed by Adobe company of the U.S., compares with other video playback technology, and FLASH video playback technology is because its appearance is more late, and technology is more advanced, is applicable to use on the internet.
But, FLASH video playback technology of the prior art, no matter be in the online FLASH video playback technology of network, or in the FLASH video jukebox software of PC, all there is no the function of video preview, user, in the time of normal play FLASH video, can not carry out preview to the content of other parts of FLASH video simultaneously, and it is convenient not therefore to use.
Summary of the invention
FLASH video playback technology for prior art does not have preview function, use defect not easily, the technical problem to be solved in the present invention is to provide a kind of FLASH video previewing method, no matter in the online FLASH video playback technology of network, or can both be suitable in the FLASH video jukebox software of PC, facilitate user in FLASH video display process to other partial content previews, can improve FLASH video playback capability, enrich video playback capability, strengthen user and experience.
A kind of FLASH video previewing method, comprise the following steps: in the time that user's mouse moves in playing progress bar, trigger video preview function, obtain video T.T. length, calculate the position of described mouse picking and the number percent of playing progress bar total length, and according to video T.T. length and described percentage calculation preview time point; According to described preview time point, judge whether the video data that described preview time point points to loads; If the video data that described preview time point points to loads, from the video data having loaded, extract the preview video data corresponding with described preview time point; Judge whether the position of current video broadcast point and the position of described preview time point are arranged in same block of video data; If so, newly-built stream object, by extremely described stream object of preview video data Replica corresponding described preview time point; Otherwise, directly read described preview video data; If the video data that described preview time point points to does not load, newly-built stream object loads the preview video data corresponding with described preview time point in described stream object; Newly-built Video object carries described preview video data, and in the preview window, plays video pictures corresponding with described preview time point in described preview video data.
Compared with prior art, in FLASH video previewing method of the present invention, the preview time point of the position judgment user according to mouse in playing progress bar, generates and shows corresponding video preview figure.Facilitate user's preview to described other partial contents of FLASH video in FLASH video display process, can improve FLASH video playback capability, enrich video playback capability, strengthen user and experience.
The technical problem to be solved in the present invention is also to provide a kind of FLASH video preview system.
A kind of FLASH video preview system, comprising: preview Time Calculation module, preview data acquisition module and preview generation module.Described preview Time Calculation module is in the time that user's mouse moves in playing progress bar, trigger video preview function, obtain video T.T. length, calculate the position of described mouse picking and the number percent of playing progress bar total length, and according to video T.T. length and described percentage calculation preview time point; Described preview data acquisition module is for obtaining corresponding preview video data according to described preview time point; Described preview generation module carries described preview video data for newly-built Video object, and in the preview window, plays video pictures corresponding with described preview time point in described preview video data; Described preview data acquisition module comprises: judge the first judge module whether video data that described preview time point points to has loaded; When the judged result of described the first judge module is while being no, newly-built stream object loads the data load-on module of the preview video data corresponding with described preview time point in described stream object; Judge whether the position of current video broadcast point and the position of described preview time point are arranged in the second judge module of same block of video data; When the judged result of described the second judge module is when being, newly-built stream object, the replication module by preview video data Replica corresponding described preview time point to described stream object; And, when the judged result of described the second judge module is while being no, directly read the read module of described preview video data.
Compared with prior art, in FLASH video preview system of the present invention, described preview Time Calculation module position judgment user's in playing progress bar according to mouse preview time point, described preview data acquisition module obtains preview video data, described preview generation module creates Video object and carries described preview video data, shows corresponding video preview figure in the preview window.Facilitate user's preview to described other partial contents of FLASH video in FLASH video display process, can improve FLASH video playback capability, enrich video playback capability, strengthen user and experience.
The technical problem to be solved in the present invention is also to provide a kind of FLASH player.Described FLASH player comprises FLASH video preview system, and described FLASH video preview system, comprising: preview Time Calculation module, preview data acquisition module and preview generation module.Described preview Time Calculation module is in the time that user's mouse moves in playing progress bar, trigger video preview function, obtain video T.T. length, calculate the position of described mouse picking and the number percent of playing progress bar total length, and according to video T.T. length and described percentage calculation preview time point; Described preview data acquisition module is for obtaining corresponding preview video data according to described preview time point; Described preview generation module carries described preview video data for newly-built Video object, and in the preview window, plays video pictures corresponding with described preview time point in described preview video data; Described preview data acquisition module comprises: judge the first judge module whether video data that described preview time point points to has loaded; When the judged result of described the first judge module is while being no, newly-built stream object loads the data load-on module of the preview video data corresponding with described preview time point in described stream object; Judge whether the position of current video broadcast point and the position of described preview time point are arranged in the second judge module of same block of video data; When the judged result of described the second judge module is when being, newly-built stream object, the replication module by preview video data Replica corresponding described preview time point to described stream object; And, when the judged result of described the second judge module is while being no, directly read the read module of described preview video data.
Compared with prior art, FLASH player of the present invention has described FLASH video preview system, in described FLASH video preview system, described preview Time Calculation module position judgment user's in playing progress bar according to mouse preview time point, described preview data acquisition module obtains preview video data, described preview generation module creates Video object and carries described preview video data, and generation also shows corresponding video preview figure in the preview window.Facilitate user's preview to described other partial contents of FLASH video in FLASH video display process, can improve FLASH video playback capability, enrich video playback capability, strengthen user and experience.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of FLASH video previewing method of the present invention;
Fig. 2 is the schematic diagram that video data loads in order;
Fig. 3 is the schematic diagram that video data segment loads;
Fig. 4 is the principle schematic of FLASH video previewing method of the present invention;
Fig. 5 is the structural representation of FLASH video preview system of the present invention;
Fig. 6 is the structural representation of a kind of embodiment of FLASH video preview system of the present invention;
Fig. 7 utilizes FLASH player of the present invention and FLASH video preview system video to be carried out to the effect schematic diagram of preview.
Wherein, 10 FLASH video preview systems;
11 preview Time Calculation modules;
111 video length acquisition modules;
112 computing modules;
12 preview data acquisition modules;
121 first judge modules;
122 data load-on modules;
123 second judge modules;
124 replication modules;
125 read modules;
13 preview generation modules.
Embodiment
Refer to Fig. 1, Fig. 1 is the schematic flow sheet of FLASH video previewing method of the present invention.
Described FLASH video previewing method comprises the following steps:
Step S101, the position calculation preview time point of locating in playing progress bar according to mouse;
In the time that user's mouse moves in playing progress bar, trigger video preview function.First obtain video T.T. length; Then calculate the position of described mouse picking and the number percent of playing progress bar total length, and according to video T.T. length and described percentage calculation described in preview time point.
In the time that FLASH video loads, can from the metadata information of video (MetaData), obtain the T.T. length of described FLASH video, be called: totalTimes.
Give an example as a reference, obtain video T.T. length step can adopt following code to realize:
By detecting the position of current mouse picking, can calculate the position of current mouse picking and the number percent of described playing progress bar total length, account form is:
Number percent=mouse current location/playing progress bar total length;
The T.T. length of described FLASH video is multiplied by described number percent, obtains current described preview time point:
Current preview time point=total Times × (mouse current location/playing progress bar total length);
Give an example as a reference, the code of realizing the described preview time point of calculating is:
var?precent＝background._xmouse/background._width；
var?now?Time＝totalTimes*precent；
Step S102, obtains corresponding preview video data according to described preview time point;
FLASH video previewing method of the present invention goes for playing the video in local video or video website, after obtaining the preview time point of user's appointment by execution step S101, in this step, the video data of downloading or storing from the buffer memory of Flash player from network according to described preview time point extracts the preview video data for generation of preview graph.Described preview data can be set to the N frame video data taking described preview time point as starting point or mid point, or N frame video data taking described preview time point as terminal, and N is positive integer, can set according to specific needs.
For the broadcasting of local FLASH video file, because whole video file may be kept at this locality, without downloading from network, therefore can directly obtain one section of video data using described preview time point as starting point as described preview video data.
And for the broadcasting of the FLASH video file on network, first need to download corresponding video data from network, then could from the video data of downloading, obtain corresponding preview video data.
Usually, while downloading corresponding video data, conventionally have two kinds of patterns from network, wherein a kind of downloading mode is according to data stream progressive download, as shown in Figure 2; Another kind of pattern is that segmentation is downloaded, be about to the data of a video file and be divided into multiple data blocks, successive between each data block, when download, can download successively data block described in each, or download the video data of multiple described data blocks, as shown in Figure 3 simultaneously.
Therefore,, for the situation of playing network video, first judge in this step whether the video data that described preview time point points to loads; If so, from the video data having loaded, extract the preview video data corresponding with described preview time point; Otherwise newly-built stream object loads the preview video data corresponding with described preview time point in described stream object.
Taking piecemeal downloading data as example, as shown in Figure 4, in multiple data blocks that the video file storing in the buffer memory of browser comprises, data block 1 loaded, data stream resource is in idle condition; Data block 2 is loading, and data stream resource is in active state; Data block 3 loadeds, but playback head is positioned on this data block, and data stream resource is in active state.
In the time that the described preview time point of user's appointment is positioned at the position of preview point 1, due to loaded of whole described data block 1, so can directly read the data of described data block 1 from the buffer memory of browser, obtain corresponding preview video data;
In the time that the described preview time point of user's appointment is positioned at the position of preview point 2, although described data block 2 is loading, but described preview is put 2 partial video data pointed and is loaded, so can directly read equally corresponding preview video data from the buffer memory of browser;
In the time that described preview time point is positioned at the position of preview point 3, the video data of this part not yet loads, and can not directly from the buffer memory of browser, read.A now newly-built stream object, in described stream object, load the preview video data corresponding with described preview time point, the video data that can start to load one section of predetermined length from described preview time point when operation is as described preview video data, it is larger that the scheme of this embodiment is applicable to block size, the situation that data loading is slower.Because other newly-built stream object is preserved the described preview video data of loading, without waiting for the video data loading according to normal load order, therefore can realize the video preview of optional position.
As another embodiment, in the time that described preview time point is positioned at the position of preview point 3, also can suspend the operation of video preview, when the load(ing) point of wait video data exceedes preview time point, perform step again S202, from the buffer memory of browser, read corresponding preview video data.Because needs are waited for video data and loaded according to normal loading sequence, therefore to be applicable to block size less for the scheme of this embodiment, and data loading is situation faster.
In the time that user's preview time point is positioned at the position of preview point 4, loaded of the video data of described data block 3, but the just played head of the resource of described data block 3 takies, and cannot be simultaneously for preview.Therefore, further judge in this step whether the position of current video broadcast point and described preview time point are arranged in same block of video data; If so, newly-built stream object, copies the preview video data corresponding with described preview time point to described stream object from the buffer memory of player; Otherwise, directly from the buffer memory of described player, read described preview video data.
In above-mentioned example, a newly-built stream object to described stream object, then extracts corresponding preview video data by the data Replica of described data block 3 in described stream object; Or directly according to described preview time point, by extremely described stream object of corresponding preview video data Replica, for generation of video preview figure.
Step S103, newly-built Video object carries described preview video data;
Video object is as the container of video data stream, and in this step, a newly-built Video object, carries the described preview video data of obtaining in step S102, to described preview video data are play to demonstration in step S104 below.
Step S104 plays video pictures corresponding with described preview time point in described preview video data in the preview window.
The seek function that can call in Flash player in this step, is searched the video pictures data corresponding with described preview time point.Described seek function can be searched and start to play close to the key frame of specifying millisecond number from the inside of video flowing, when video flowing is in halted state, what call that seek function obtains is exactly close to the broadcasting pictures of key frame of specifying millisecond number, in the present invention as described video preview figure.Because the described preview video data itself that obtain in described step S102 are in halted state, therefore in this step, call seek function and search in described preview video data the picture data close to the key frame of described preview time point, and in newly-built the preview window, play described key frame picture.As an embodiment, the display position of described the preview window is arranged on described mouse to be determined on bit position in playing progress bar, the size of described the preview window can be set according to actual conditions, to facilitate user to check that preview screen does not affect normal video picture disply and is as the criterion.
Give an example as a reference, the described preview video data that obtain in step S102 are called stream, and the code of performing step S103 and step S104 is:
video.attach?Video(stream)；
Stream.seek (current preview time point);
Compared with prior art, in FLASH video previewing method of the present invention, the preview time point of the position judgment user according to mouse in playing progress bar, generation also shows corresponding video preview figure in the preview window.Use the method in the time of the video of playing in local video or video website, to produce preview to the content of other parts of video.Can improve FLASH video playback capability, enrich video playback capability, strengthen user and experience.
FLASH player of the present invention comprises FLASH video preview system.Described FLASH player can be the independent player program of installing on local computer, also can be arranged on the FLASH player on web browser, for the video on displaying video website.
Refer to Fig. 5, Fig. 5 is the structural representation of FLASH video preview system of the present invention.
Described FLASH video preview system 10 comprises: preview Time Calculation module 11, preview data acquisition module 12 and preview generation module 13.Described preview Time Calculation module 11, for determine bit position in playing progress bar according to mouse, is calculated preview time point; Described preview data acquisition module 12 obtains corresponding preview video data for the described preview time point calculating according to described preview Time Calculation module 11; Described preview generation module 13 carries for newly-built Video object the preview video data that described preview data acquisition module 12 obtains, and in newly-built the preview window, plays picture corresponding with described preview time point in described preview video data.
Please further consult Fig. 6, Fig. 6 is the structural representation of a kind of embodiment of FLASH video preview system of the present invention.
Described preview Time Calculation module 11 comprises video length acquisition module 111 and computing module 112, and described video length acquisition module 111 is for obtaining described video T.T. length; Described computing module 112 is for calculating the position of described mouse picking and the number percent of playing progress bar total length, and obtain according to described video length acquisition module 111 described video T.T. length and described percentage calculation described in preview time point.
In the time that user's mouse moves in playing progress bar, trigger the video preview function of FLASH video preview system 10 of the present invention.Described video length acquisition module 111 obtains the T.T. length of described FLASH video from the metadata information (MetaData) of FLASH video, is called: totalTimes.
First described computing module 112 calculates the position of current mouse picking and the number percent of described playing progress bar total length, and computing formula is:
Number percent=mouse current location/playing progress bar total length;
Then, the T.T. length of described FLASH video is multiplied by described number percent by described computing module 112, obtains current preview time point, and computing formula is:
Current preview time point=total Times × (mouse current location/playing progress bar total length)
FLASH player of the present invention goes for playing the video in local video or video website, and described preview data acquisition module 12 extracts by the preview video data that produce preview graph for the video data of downloading or storing from the buffer memory of Flash player from network according to described preview time point.Described preview data can be set to the N frame video data taking described preview time point as starting point or mid point, or N frame video data taking described preview time point as terminal, and N is positive integer, can set according to specific needs.
For the broadcasting of local FLASH video file, because whole video file may be kept at this locality, without downloading from network, therefore described preview data acquisition module 12 can be directly obtain one section of video data using described preview time point as starting point as described preview video data from the video file of this locality preservation.And for the broadcasting of the FLASH video file on network, first need to download corresponding video data from network, then could from the video data of downloading, obtain corresponding preview video data.
Described preview data acquisition module 12 comprises the first judge module 121, data load-on module 122, the second judge module 123, replication module 124 and read module 125, and described the first judge module 121 is for judging whether the video data that described preview time point points to loads; In the judged result of described the first judge module 121, while being no, the newly-built stream object of described data load-on module 122 loads the preview video data corresponding with described preview time point in described stream object.
Whether described the second judge module 123 is positioned at same block of video data for the position and the described preview time point that judge current video broadcast point; In the judged result of described the second judge module 123 when being, the played head of resource of data block takies, cannot be simultaneously for preview, therefore the newly-built stream object of described replication module 124, copies the preview video data corresponding with described preview time point to described stream object from the buffer memory of player; In the judged result of described the second judge module 123, while being no, described read module 125 directly reads the read module of described preview video data.
Video object is as the container of video data stream, and the described preview video data that described preview data acquisition module 12 obtains need to be carried a Video object again can play demonstration, generates preview graph.Therefore, the first newly-built Video object of described preview generation module 13 carries the preview video data that described preview data acquisition module 12 obtains.
Described preview generation module 13 can call the seek function generating video preview graph in Flash player.Seek function can be searched and start to play close to the key frame of specifying millisecond number from the inside of video flowing.So when video flowing is in halted state, what call that seek function obtains is exactly close to the broadcasting pictures of key frame of specifying millisecond number.Because the described preview video data itself that described preview data acquisition module 12 obtains are in halted state, therefore described preview generation module 13 can call seek function and search in described preview video data the picture data close to the key frame of described preview time point, and in newly-built the preview window, plays described key frame picture.As an embodiment, the display position of described the preview window is arranged on described mouse to be determined on bit position in playing progress bar, the size of described the preview window can be set according to actual conditions, to facilitate user to check that preview screen does not affect normal video picture disply and is as the criterion.Utilize FLASH player plays FLASH video of the present invention or utilize effect that described FLASH video preview system 10 carries out preview to video as shown in Figure 7, the picture of current FLASH player plays is that reproduction time is the picture of 52 seconds, user's mouse picking is to locate for 56 seconds at reproduction time, and the video pictures that FLASH video preview system of the present invention is 56 to described reproduction time generates preview.
Compared with prior art, FLASH player of the present invention comprises described FLASH video preview system 10, described preview Time Calculation module 11 position judgment user's in playing progress bar according to mouse of described FLASH video preview system 10 preview time point, described preview data acquisition module 12 obtains preview video data, described preview generation module 13 creates Video object and carries described preview video data, and generation also shows corresponding video preview figure in newly-built the preview window.Use this FLASH player or the described FLASH video preview system can be in the time of the video of playing in local video or video website, the content of other parts of video is produced to preview, can improve FLASH video playback capability, enrich video playback capability, strengthen user and experience.
Above-described embodiment of the present invention, does not form limiting the scope of the present invention.Any amendment of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in claim protection domain of the present invention.
Claims (3)
1. a FLASH video previewing method, is characterized in that comprising the following steps:
In the time that user's mouse moves in playing progress bar, trigger video preview function, obtain video T.T. length, calculate the position of described mouse picking and the number percent of playing progress bar total length, and according to video T.T. length and described percentage calculation preview time point;
According to described preview time point, judge whether the video data that described preview time point points to loads;
If the video data that described preview time point points to loads, from the video data having loaded, extract the preview video data corresponding with described preview time point; Judge whether the position of current video broadcast point and the position of described preview time point are arranged in same block of video data; If so, newly-built stream object, by extremely described stream object of preview video data Replica corresponding described preview time point; Otherwise, directly read described preview video data;
If the video data that described preview time point points to does not load, newly-built stream object loads the preview video data corresponding with described preview time point in described stream object;
Newly-built Video object carries described preview video data, and in the preview window, plays video pictures corresponding with described preview time point in described preview video data.
2. FLASH video previewing method as claimed in claim 1, is characterized in that, the step of playing video pictures corresponding with described preview time point in described preview video data in the preview window comprises:
Call seek function and search in described preview video data the picture data close to the key frame of the preview time point of described mouse picking, and in the preview window, play described key frame picture.
3. a FLASH video preview system, is characterized in that comprising:
For in the time that user's mouse moves in playing progress bar, trigger video preview function, obtain video T.T. length, calculate the position of described mouse picking and the number percent of playing progress bar total length, and according to video T.T. length and the preview Time Calculation module of described percentage calculation preview time point;
For obtain the preview data acquisition module of corresponding preview video data according to described preview time point;
Carry described preview video data for newly-built Video object, and in the preview window, play the preview generation module of video pictures corresponding with described preview time point in described preview video data;
Described preview data acquisition module comprises:
Judge the first judge module whether video data that described preview time point points to has loaded;
When the judged result of described the first judge module is while being no, newly-built stream object loads the data load-on module of the preview video data corresponding with described preview time point in described stream object;
Judge whether the position of current video broadcast point and the position of described preview time point are arranged in the second judge module of same block of video data;
When the judged result of described the second judge module is when being, newly-built stream object, the replication module by preview video data Replica corresponding described preview time point to described stream object;
And, when the judged result of described the second judge module is while being no, directly read the read module of described preview video data.
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