CN101662675A - Method and system for conversing PPT into video - Google Patents
Method and system for conversing PPT into video Download PDFInfo
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- CN101662675A CN101662675A CN 200910190146 CN200910190146A CN101662675A CN 101662675 A CN101662675 A CN 101662675A CN 200910190146 CN200910190146 CN 200910190146 CN 200910190146 A CN200910190146 A CN 200910190146A CN 101662675 A CN101662675 A CN 101662675A
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Abstract
The invention relates to a method for conversing PPT into video. The method comprises the following steps of processing each PPT frame in a PPT file: S1) confirming the complexity thereof according tothe cartoon type of PPT frame, S2) setting a playing speed according to the complexity and playing the PPT frame with the set playing speed, performing the operations of sectional drawing and encoding on PPT frame during playing, automatically regulating the playing speed according to the time for sectional drawing and encoding after finishing the operations of sectional drawing and encoding, andS3) storing the encoding result into a video file. The invention further relates to a system for conversing PPT into video, comprising a cartoon type confirming unit, a playing and processing unit and a video generating unit. With the technical scheme, the invention can be applied to various machines, can fully utilize the machine resource to rapidly finishing conversion, can increase the conversion speed and ensure the conversion quality.
Description
Technical field
The present invention relates to the video switch technology in multimedia field, more particularly, relate to a kind of method and system that PPT is converted to video.
Background technology
The method that present PPT (Powerpoint) is converted to video is to play specifying the PPT file by calling the PPT program, the forms of playing are carried out sectional drawing, and the sectional drawing data are preserved into temporary file, and from temporary file, reading the sectional drawing data again, code conversion is various video files.This method conversion speed is slow, need be once with the complete broadcast of PPT file, and the information that sectional drawing obtains saves as temporary file, restores the image of each frame and is converted to video file by temporary file again.And, under system resource anxiety or the low situation of machines configurations, can not guarantee conversion quality preferably.PPT file playing process and playback rate are uncontrollable.More or the comparatively complicated PPT file for animation is had relatively high expectations to system resource, and the sectional drawing data can not in time be preserved, and cause easily frame-skipping occurring in the sectional drawing process.
Summary of the invention
The technical problem to be solved in the present invention is that the slow and unwarrantable defective of conversion quality provides a kind of method and system that PPT is converted to video at the conversion speed of prior art.
The technical solution adopted for the present invention to solve the technical problems is, constructs a kind of PPT to be converted to the method and system of video, and the step that each PPT picture of PPT file is handled comprises:
S1) determine its complexity according to the animation types of this PPT picture;
S2) according to this complexity playback rate is set, and plays this PPT picture with the playback rate that is provided with; And in playing process, regularly the PPT picture is carried out sectional drawing and encoding operation, after each sectional drawing and encoding operation, according to sectional drawing and the dynamic playback rate of adjusting of time of encoding and being consumed;
S3) result that will encode is saved in the video file.
In the method that PPT is converted to video of the present invention, whether step S1 further comprises, inserts the identification animation in the desired location of this PPT picture, exist and judge whether this PPT picture finishes by discerning described identification animation, if then enter next PPT picture.
In the method that PPT is converted to video of the present invention, described identification animation is the distinguishing mark with specific color.
In the method that PPT is converted to video of the present invention, among the step S1, described animation types comprises the complexity of animation quantity, animation.
In the method that PPT is converted to video of the present invention, among the step S3, the described time that is consumed according to sectional drawing and coding is adjusted playback rate and comprises by judging that the time that described sectional drawing and coding are consumed judges whether to surpass setting threshold.
Provide a kind of system that PPT is converted to video on the other hand according to the present invention, comprising:
The animation types determining unit is used for determining its complexity according to the animation types of PPT picture;
Play and processing unit, be used for playback rate being set, and play this PPT picture with the playback rate that is provided with according to this complexity; And in playing this PPT picture process, the PPT picture is carried out sectional drawing and encoding operation, and after each sectional drawing and encoding operation, adjust playback rate according to the time that sectional drawing and coding are consumed;
The video generation unit is used for the result of coding is saved in video file.
In the system that PPT is converted to video of the present invention, described animation types determining unit also is used to insert the identification animation in the desired location of this PPT picture, whether have to judge whether this PPT picture finishes by discerning described identification animation, if then enter next PPT picture.
In the system that PPT is converted to video of the present invention, described identification animation is the distinguishing mark with specific color.
In the system that PPT is converted to video of the present invention, described animation types comprises the complexity of animation quantity, animation.
In the system that PPT is converted to video of the present invention, described broadcast and processing unit comprise playing module, sectional drawing and coding module, judge module; Described judge module is used to judge whether the time that described sectional drawing and coding are consumed surpasses setting threshold; If then adjust playback rate.
Implement the technical scheme that PPT is converted to video of the present invention, have following beneficial effect: by each broadcasting pictures of PPT is resolved, and adjust playback rate dynamically according to the complexity and the system resource situation of its animation.In addition, also judge by on the PPT broadcasting pictures, inserting the identification picture whether animation finishes, can jump into next picture fast, save change-over time if finish then.Technical scheme of the present invention is fit to various machine environment, can utilize machine resources to finish transfer process fast fully, has improved conversion speed.Even under the situation that system resource comparatively lacks, still can guarantee conversion quality.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is that each PPT picture conversion with the PPT file of the preferred embodiment of the present invention is the method flow diagram of video;
Fig. 2 is the system configuration schematic diagram that PPT is converted to video of the preferred embodiment of the present 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.
Each PPT picture conversion with PPT (Powerpoint) file that Fig. 1 shows the preferred embodiment of the present invention is the method flow diagram of video.As shown in Figure 1, the step that each PPT picture of PPT file is handled comprises:
102, determine its complexity according to the animation types of PPT picture, and insert the identification animation.
This identification animation is located at the ad-hoc location (this ad-hoc location can be set arbitrarily, is located at the upper left corner of each PPT picture in the present embodiment) of this PPT picture;
Need to prove herein: step 102 was finished before the PPT file is play, and had just determined the complexity of all PPT pictures and inserted the identification animation before playing in each PPT picture.Certainly, other implementation can also be arranged, still not break away from protection scope of the present invention.
104, according to this complexity playback rate is set, and plays this PPT picture with the playback rate that is provided with; And in playing process, regularly the PPT picture is carried out sectional drawing and encoding operation, and after each sectional drawing and encoding operation, according to sectional drawing and the dynamic playback rate of adjusting of time of encoding and being consumed; The result that will encode is saved in the video file then.
In step 106, judge whether to exist the identification animation, if illustrate that then current PPT picture finishes, otherwise get back to step 104.
After all PPT pictures finish playing, finish the video conversion operations.
Below said process is described in detail.
In the step 102, before the PPT file is play, resolve the animation situation on each PPT picture (Slide, i.e. each page or leaf of PPT).Call the PPT relevant interface the various animation types that each Slide goes up insertion are sorted out, then classify as and can 6 times of speed quicken as no animation, simple animation 2 is speed extraordinarily, complicated animation 0.6 demultiplication speed or the like.Classification described herein does not limit the present invention just in order to better explanation the present invention, can adjust as required and revise.The parameter that animation types is sorted out comprises the complexity of animation quantity, animation.
In this step, can also insert and be used to the identification animation of judging whether each Slide finishes.The interface that calling PPT provides inserts the identification animation in PPT, this identification animation is self-defining animation, as long as can provide the picture of distinguishing mark or mark all to be fine.In the present embodiment, this identification animation is a minor matrix that has specific color.When each Slide finishes, this identification animation will appear at the upper left corner of playing forms, analyze by the sectional drawing data upper left corner to forms, and whether identification sectional drawing data have this recognition matrix.If exist then judge current Slide and go up all animations and play end, be in relevant idle period.Otherwise can judge that then Slide goes up all animations and do not play end.
In step 104, play this PPT picture, and adjust playback rate according to the complexity of this PPT picture.In the PPT playing process, dynamically judge whether current Slide animation all finishes playing according to the identification animation, the Slide animation situation of resolving in 102 if do not finish playing is set by step quickened, if finished playing then judge current playing process and be in relative static conditions, can quicken to skip, enter next Slide.For example, if the demonstration time of a certain PPT picture is 6 seconds, the demonstration time of animation is 0.5 second, and other word segment demonstration time is 5.5 seconds; After end in 0.5 second of animation, 5.5 seconds remaining character presentation times just for the time of readers ' reading, can quicken to skip fully, thereby shorten the time that video is changed, and enter next Slide fast so.
The PPT program is generally obtained the reference time by calling system api function GetTickCount, and then the controls playing process.Technical scheme of the present invention is by using a self-defining function to replace the GetTickCount function, thereby the reference time in the control PPT playing process reaches the purpose of the broadcast PPT of speed change.
Be implemented as follows:
1, obtain the memory address at former GetTickCount function place, write jump instruction at this memory address, jump to the address at self-defining function place, what PPT called that in fact the GetTickCount function call like this is SQL.
2, in SQL, the value of variable dwTickCount is returned to PPT, the reference time of playing as PPT.The unit of dwTickCount is a millisecond.Therefore just can control the speed of PPT as long as the value of variable dwTickCount made amendment.
3, a timer is set and comes dwTickCount is controlled, each millisecond of timer triggers once, under normal play speed, the value of dwTickCount is added 1, under 2X speed, with dwTickCount+2, by that analogy, realized the setting of the different playback rates of Powerpoint.
Determine playback rate according to the animation types that step 102 is determined, and realize in the manner described above playing according to this playback rate.
In the step 104, in playing process, regularly the PPT picture is carried out sectional drawing and encoding operation, and follow the tracks of the time that sectional drawing and cataloged procedure consumed each time, if this overlong time, can cause parts of images to have little time to preserve or coding, and then cause frame-skipping, can guarantee conversion quality by slowing down or suspending the PPT playing process.In addition, in step 104, the result of coding is saved in video file, here can support the various video file format, MPEG (Moving Pictures Experts Group) for example, AVI (Audio/Video Interleave), MP4 (Moving Picture Experts Group 4), WMV (Windows Media Video), ASF (Advanced Streaming Format), FLV (FlashVideo), MOV (a kind of files in stream media form of Apple company exploitation), 3GP (the 3rdGeneration Partner Project), 3G2 (the 3rd Generation Partner Project 2).
Fig. 2 shows the system configuration schematic diagram that PPT is converted to video of the preferred embodiment of the present invention.This system comprises: animation types determining unit 202, judging unit 204, broadcast and processing unit 206, video generation unit 208.
Animation types determining unit 202 is used for determining its complexity according to the animation types of PPT picture;
Play and processing unit 206, be used for playback rate being set, and play this PPT picture with the playback rate that is provided with according to this complexity; And in playing this PPT picture process, the PPT picture is carried out sectional drawing and encoding operation, and after each sectional drawing and encoding operation, adjust playback rate according to the time that sectional drawing and coding are consumed;
Before the PPT file was play, animation types determining unit 202 was resolved the animation situation on each PPT picture (Slide, i.e. each page or leaf of PPT).Call the PPT relevant interface the various animation types that each Slide goes up insertion are sorted out, then classify as and can 6 times of speed quicken as no animation, simple animation 2 is speed extraordinarily, complicated animation 0.6 demultiplication speed or the like.Classification described herein does not limit the present invention just in order to better explanation the present invention, can adjust as required and revise.
Animation types determining unit 202 also is used to insert and is used to the identification animation of judging whether each Slide finishes.The interface that calling PPT provides inserts the identification animation in PPT, this identification animation is self-defining animation, as long as can provide the picture of distinguishing mark or mark all to be fine.In the present embodiment, this identification animation is a minor matrix that has specific color.When each Slide finishes, this identification animation will appear at the upper left corner of playing forms, analyze by the sectional drawing data upper left corner to forms, and whether identification sectional drawing data have this recognition matrix.If exist then judge current Slide and go up all animations and play end, be in relevant idle period.Otherwise can judge that then Slide goes up all animations and do not play end.
Broadcast and processing unit 206 comprise playing module 2062, sectional drawing and coding module 2064, judge module 2066.In the PPT playing process, dynamically judge whether current Slide animation all finishes playing according to the identification animation, do not quicken according to the Slide animation situation of animation types determining unit 202 parsings if finish playing, if finished playing then judge current playing process and be in relative static conditions, can quicken to skip, enter next Slide.For example, if the demonstration time of a certain PPT picture is 6 seconds, the demonstration time of animation is 0.5 second, and other word segment demonstration time is 5.5 seconds; After end in 0.5 second of animation, 5.5 seconds remaining character presentation times just for the time of readers ' reading, can quicken to skip fully, thereby shorten the time that video is changed, and enter next Slide fast so.
The PPT playback rate controlling schemes of the system that PPT is converted to video of the present invention is with the scheme of the inventive method, also be by using a self-defining function to replace the GetTickCount function, thereby control the reference time in the PPT playing process, reach the purpose of the broadcast PPT of speed change.No longer do elaboration herein.
The result that video generation unit 208 will be encoded is saved in video file, can support the various video file format here, MPEG for example, AVI, MP4, WMV, ASF, FLV, MOV, 3GP, 3G2 or the like.
The method and system that PPT is converted to video that the present invention proposes has following beneficial effect: by each broadcasting pictures of PPT is resolved, and adjust playback rate dynamically according to the complexity and the system resource situation of its animation.In addition, also judge by on the PPT broadcasting pictures, inserting the identification picture whether animation finishes, can jump into next picture fast, save change-over time if finish then.Technical scheme of the present invention is fit to various machine environment, can utilize machine resources to finish transfer process fast fully, has improved switching rate.Even under the situation that system resource comparatively lacks, still can guarantee conversion quality.
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 (10)
1, a kind of PPT is converted to the method for video, it is characterized in that, comprise each PPT picture of PPT file is carried out following operation:
S1) determine its complexity according to the animation types of this PPT picture;
S2) according to this complexity playback rate is set, and plays this PPT picture with the playback rate that is provided with; And, in playing process, regularly the PPT picture is carried out sectional drawing and encoding operation, after each sectional drawing and encoding operation, according to sectional drawing and the dynamic playback rate of adjusting of time of encoding and being consumed;
S3) result that will encode is saved in the video file.
2, the method that PPT is converted to video according to claim 1, it is characterized in that, step S1 further comprises, insert the identification animation in the desired location of this PPT picture, in playing process, whether exist and judge whether this PPT picture finishes by discerning described identification animation, if then enter next PPT picture.
3, the method that PPT is converted to video according to claim 2 is characterized in that described identification animation is a distinguishing mark.
4, the method that PPT is converted to video according to claim 1 is characterized in that among the step S1, described animation types comprises the complexity of animation quantity, animation.
5, according to each described method that PPT is converted to video of claim 1, it is characterized in that, among the step S2, the described time that is consumed according to sectional drawing and coding is adjusted playback rate and comprises by judging that the time that described sectional drawing and coding are consumed judges whether to surpass setting threshold.
6, a kind of PPT is converted to the system of video, it is characterized in that, comprising:
The animation types determining unit is used for determining its complexity according to the animation types of PPT picture;
Play and processing unit, be used for playback rate being set, and play this PPT picture with the playback rate that is provided with according to this complexity; And in playing this PPT picture process, the PPT picture is carried out sectional drawing and encoding operation, and after each sectional drawing and encoding operation, adjust playback rate according to the time that sectional drawing and coding are consumed;
The video generation unit is used for the result of coding is saved in video file.
7, the system that PPT is converted to video according to claim 6, it is characterized in that, described animation types determining unit also is used for: insert the identification animation in the desired location of this PPT picture, whether exist and judge whether this PPT picture finishes by discerning described identification animation, if then enter next PPT picture.
8, according to claim 6 PPT is converted to the system of video, it is characterized in that, also comprise judging unit, be used to judge whether all PPT pictures of PPT file finish, if then finish; If not, then carry out play operation by broadcast unit.
9, the system that PPT is converted to video according to claim 6 is characterized in that described animation types comprises the complexity of animation quantity, animation.
10, the system that PPT is converted to video according to claim 6 is characterized in that described broadcast and processing unit comprise playing module, sectional drawing and coding module, judge module;
Described judge module is used to judge whether the time that described sectional drawing and coding are consumed surpasses setting threshold; If then adjust playback rate.
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| CN 200910190146 CN101662675B (en) | 2009-09-10 | 2009-09-10 | Method and system for conversing PPT into video |
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| CN 200910190146 CN101662675B (en) | 2009-09-10 | 2009-09-10 | Method and system for conversing PPT into video |
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