CN105578261B - A kind of method and apparatus of video clipping - Google Patents
A kind of method and apparatus of video clipping Download PDFInfo
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- CN105578261B CN105578261B CN201510957866.6A CN201510957866A CN105578261B CN 105578261 B CN105578261 B CN 105578261B CN 201510957866 A CN201510957866 A CN 201510957866A CN 105578261 B CN105578261 B CN 105578261B
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000005520 cutting process Methods 0.000 claims abstract description 40
- 239000013078 crystal Substances 0.000 claims abstract description 24
- 230000000630 rising effect Effects 0.000 claims 1
- 238000004590 computer program Methods 0.000 description 7
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- 238000006243 chemical reaction Methods 0.000 description 4
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4331—Caching operations, e.g. of an advertisement for later insertion during playback
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/44004—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video buffer management, e.g. video decoder buffer or video display buffer
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/44016—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving splicing one content stream with another content stream, e.g. for substituting a video clip
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/854—Content authoring
- H04N21/8547—Content authoring involving timestamps for synchronizing content
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
The invention discloses a kind of method and apparatus of video clipping, to improve the play quality of editing backsight frequency file.It is instructed this method comprises: receiving the cutting comprising the point of contact time, wherein the point of contact time includes: initial time and end time；The video data frame of the timestamp and the point of contact time match of video flowing in source video file is handled, the first video file after cutting to the source video file is obtained；According to crystal oscillator frequency, converts to the timestamp of video flowing in first video file after switching, determine the play time of first video file.In this way, video flowing in source video file is cut according to timestamp, and according to crystal oscillator frequency to the timestamp of video flowing converts in the first video file after cutting, this ensure that switching after the first video file broadcast time it is correct, improve improve editing backsight frequency file play quality.
Description
Technical field
The present invention relates to multimedia technology field, in particular to a kind of method and apparatus of video clipping.
Background technique
As the broadcasting of the development of multimedia technology, video, audio, picture etc. is generally known by user.User exists
When carrying out multimedia, such as when video playing, it may not be necessary to whole video contents is watched, alternatively, merely desiring to watch it
In certain several segment.In this way, it is necessary to editing be carried out to video, cut several segment texts from source video file according to demand
Part is then combined with into a new video file and plays out.
Currently, some video clipping softwares can to source video file carry out non-linear editing, can according to user instructions,
Video is scanned for, until searching cut-point, and by Video segmentation at multistage segment video, the segment that then will need to be watched
Video merging is played out at a new video file, and this operation is very quick, but may have new video text
Between part sound intermediate frequency and video it is imperfect there are time difference or certain video requency frame datas and the problems such as can not play.
Summary of the invention
The present invention provides a kind of method and apparatus of video clipping, to improve the play quality of editing backsight frequency file.
The present invention provides a kind of method of video clipping, this method comprises:
It receives the cutting comprising the point of contact time to instruct, wherein the point of contact time includes: initial time and end time；
The video data frame of the timestamp and the point of contact time match of video flowing in source video file is handled, is obtained
The first video file to after being cut to the source video file；
It according to crystal oscillator frequency, converts, determines to the timestamp of video flowing in first video file after switching
The play time of first video file.
In one embodiment of the invention, the view to video flowing timestamp in source video file and the point of contact time match
Frequency data frame carries out processing
When the timestamp of a video data frame in the source video file video flowing was greater than or equal in the point of contact time
Initial time, and be less than the point of contact time in end time when, the video data frame is determined as current video number
According to frame；
Obtain the current video data frame.
In one embodiment of the invention, the view to video flowing timestamp in source video file and the point of contact time match
Frequency data frame is handled further include:
After the end time of the point of contact time being located at the timestamp of the current video data frame, next video counts
When according to before the timestamp of frame, the current video data frame is abandoned.
In one embodiment of the invention, the view to video flowing timestamp in source video file and the point of contact time match
Frequency data frame is handled further include:
After the end time of the point of contact time being located at the timestamp of the current video data frame, next video counts
When according to before the timestamp of frame, obtain between the end time of the point of contact time and the timestamp of the current video data frame
Relative difference；
According to the frame per second of the video render, mean time value is obtained；
If the relative difference be greater than with the mean time value, retain the current video data frame；
If the relative difference is less than or equal to the mean time value, the current video data frame is abandoned.
It is described according to crystal oscillator frequency in one embodiment of the invention, to video flowing in first video file after switching
Timestamp convert, determine that the play time of first video file includes:
The playing duration of every frame video data frame is determined according to crystal oscillator frequency；
According to before the playing duration and first video file and the time of the first adjacent video file
Stamp, converts to the timestamp of video flowing in first video file.
The present invention provides a kind of device of video clipping, which includes:
Receiving unit is instructed for receiving the cutting comprising the point of contact time, wherein when the point of contact time includes: starting
Between and the end time；
Processing unit, the video data for timestamp and the point of contact time match to video flowing in source video file
Frame is handled, and the first video file after cutting to the source video file is obtained；
Scaling unit, for changing the timestamp in first video file after switching according to crystal oscillator frequency
It calculates, determines the play time of first video file.
In one embodiment of the invention, the processing unit includes:
Subelement is determined, for being greater than or equal to when the timestamp of a video data frame in the source video file video flowing
Initial time in the point of contact time, and be less than the point of contact time in end time when, the video data frame is true
It is set to current video data frame；
Subelement is obtained, for obtaining the current video data frame.
In one embodiment of the invention, the processing unit further include:
Subelement is abandoned, the timestamp of the current video data frame is located at for the end time when the point of contact time
When later, before the timestamp of next video data frame, the current video data frame is abandoned.
In one embodiment of the invention, the processing unit further include:
Select subelement, the end time for the point of contact time be located at the current video data frame timestamp it
When afterwards, before the timestamp of next video data frame, obtain the point of contact time end time and the current video data
Relative difference between the timestamp of frame；According to the frame per second of the video render, mean time value is obtained；If the relative mistake
Value be greater than with the mean time value, retain the current video data frame；If the relative difference is less than or equal to described flat
Equal time value abandons the current video data frame.
In one embodiment of the invention, the scaling unit includes:
Duration determines subelement, for determining the playing duration of every frame video data frame according to crystal oscillator frequency；
Convert subelement, for according to before the playing duration and first video file and adjacent first
The timestamp of video file converts to the timestamp of video flowing in first video file.
Some beneficial effects of the embodiment of the present invention may include:
Video flowing in source video file is cut according to timestamp, and according to crystal oscillator frequency to the first view after cutting
The timestamp of video flowing converts in frequency file, this ensure that switching after the first video file broadcast time it is correct, mention
The high play quality for improving editing backsight frequency file.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention can be by written explanation
Specifically noted structure is achieved and obtained in book, claims and attached drawing.
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the flow chart of video clipping shown according to an exemplary embodiment；
Fig. 2 is the schematic diagram of video data frame time shaft shown according to an exemplary embodiment；
Fig. 3 is the flow chart according to the video clipping shown in an exemplary embodiment one；
Fig. 4 is the flow chart according to the video clipping shown in an exemplary embodiment two；
Fig. 5 is the structure chart of the device of video clipping shown according to an exemplary embodiment；
Fig. 6 is the structure chart of processing unit 520 shown according to an exemplary embodiment；
Fig. 7 is the structure chart of processing unit 520 shown according to an exemplary embodiment；
Fig. 8 is the structure chart of processing unit 520 shown according to an exemplary embodiment；
Fig. 9 is the structure chart of scaling unit 530 shown according to an exemplary embodiment.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
The technical solution that the embodiment of the present disclosure provides, cuts video flowing in source video file according to timestamp, and
And according to crystal oscillator frequency to the timestamp of video flowing converts in the first video file after cutting, this ensure that the after switching
One video file broadcast time it is correct, improve improve editing backsight frequency file play quality.
Fig. 1 is the flow chart of video clipping shown according to an exemplary embodiment.The process of video clipping such as Fig. 1 institute
Show, comprising:
Step 101: receiving the cutting comprising the point of contact time and instruct, wherein the point of contact time includes: initial time at the end of
Between.
Here, it needs by the video file of editing to be source video file.Every frame video counts in the video flowing of source video file
There is corresponding timestamp according to frame.
According to application demand, it is determined that after the time of point of contact, then the cutting instruction comprising the point of contact time can be inputted, in this way, can
Switching command is received, such as: the point of contact time for including in switching command includes: 8 points of initial time 0 minute and 0 second, and the end time is
8 points 5 minutes 120 milliseconds.
Step 102: to the timestamp of video flowing in source video file at the video data frame of point of contact time match
Reason, obtains the first video file after cutting to source video file.
Source video file can be cut according to the point of contact time of input and video time stamp and audio time stamp,
Specifically can include: when the timestamp of a video data frame in source video file video flowing is greater than or equal to the starting in the time of point of contact
Time, and be less than in the time of point of contact end time when, video data frame is determined as current video data frame, forward sight is worked as in acquisition
Frequency data frame.
By taking video flowing as an example, the video playing rate of source video file is 25FPS, i.e. 25 frame video datas of broadcasting per second
Frame, i.e., the play time of every frame are 40ms.In this way, being with reference to starting point, then the time of first frame video data frame with 8:00
Stamp for 8 points 0 second 0 minute；And the timestamp of the second frame video data frame be 8 points 0 minute 40 milliseconds；The time of third frame video data frame
Stamp for 8 points 0 minute 80 milliseconds；And so on, and the timestamp of the 9000th frame video data frame be 8 points 0 second 6 minutes.
After receiving switching command, point of contact time for including in switching command.Such as: 8 points of point of contact time initial time 0 minute 0
Second, and the end time be 8 points 5 minutes 120 milliseconds, in this way, the timestamp of first frame video data frame be 8 points 0 second 0 minute, be equal to
Begin 0 minute and 0 second 8 points of time and to be less than 120 milliseconds of 5 minutes 8 points of end times, then obtains first frame video data frame, same second
The timestamp of frame video data frame be 8 points 0 minute 40 milliseconds, greater than 8 points of initial time 0 minute and 0 second and be less than the end time 8: 5
Divide 120 milliseconds, then obtains the second frame video data frame.And the timestamp of the 9000th frame video data frame is at 8 points and is greater than for 0 second 6 minutes
120 milliseconds of 5 minutes 8 points of end times, then it cannot obtain the 9000th frame video data frame.
Since every frame video data frame has certain play time, such as 40 milliseconds, that cuts when being cut
The end time of point time may be placed exactly among the play time of a frame, at this time, it may be necessary to carry out to the frame video data frame
Processing, can abandon video data frame, or carry out the processing that rounds up.
Such as: the video playing rate of source video file is 25FPS, i.e. 25 frame video data frames of broadcasting per second, i.e., every frame
Play time be 40ms.In this way, with 8:00 be with reference to starting point, then the timestamp of first frame video data frame be 8 points 0 minute
0 second；And the timestamp of the second frame video data frame be 8 points 0 minute 40 milliseconds；The timestamp of third frame video data frame be 8 points 0 minute
80 milliseconds.And 8 points of the initial time of point of contact time 0 minute and 0 second, the end time be 8 points 3 minutes 10 milliseconds, as shown in Fig. 2, the 4500th
The timestamp of frame video data frame be 8 points 0 second 3 minutes, and the timestamp of the 4501st frame video data frame be 8 points 40 seconds 3 minutes, this
When, the end time of point of contact time is located at after the timestamp of the 4500th frame video data frame, and the 4501st frame video data frame
Timestamp before, then need to handle the 4500th frame video data frame.Specifically, the 4500th frame video can directly be abandoned
Data frame.Alternatively, carrying out the processing that rounds up.
And the process for the processing that rounds up, then it needs to be determined according to the frame per second of video render, such as video playing rate
It is 25FPS, i.e., the play time of every frame is 40ms.So average value is 20ms.The timestamp of 4500th frame video data frame is
Relative difference between the end time of point of contact time is 10ms, and being less than 20ms then can drop the 4500th frame video data frame.When
So, if the end time be 8 points 3 minutes 30 milliseconds, the timestamp of the 4500th frame video data frame at the end of the time of point of contact
Between between relative difference be 30ms, be greater than 20ms, then can retain the 4500th frame video data frame.
Therefore, after obtaining current video data frame, to video flowing timestamp in source video file and point of contact time
The video data frame matched is handled further include: when the end time of point of contact time be located at current video data frame timestamp it
When afterwards, before the timestamp of next video data frame, current video data frame is abandoned.Or carry out the processing that rounds up.In this way,
Carrying out processing to the video data frame of video flowing timestamp in source video file and point of contact time match may also include that when point of contact
Between end time be located at after the timestamp of current video data frame, when before the timestamp of next video data frame, obtain
Relative difference between the end time of point of contact time and the timestamp of current video data frame；According to the frame of video render
Rate obtains mean time value；If relative difference is greater than and mean time value, retain current video data frame；If relative difference is small
In or equal to mean time value, current video data frame is abandoned.
Step 103: according to crystal oscillator frequency, convert to the timestamp of video flowing in the first video file after switching,
Determine the play time of the first video file.
The time of general terminal is obtained according to crystal oscillator frequency, therefore, also according to crystal oscillator frequency in the present embodiment, to cutting
The timestamp of video flowing converts in the first video file after changing, and determines the play time of the first video file.Specifically may be used
It include: the playing duration that every frame video data frame is determined according to crystal oscillator frequency；According to playing duration and the first video file it
The timestamp of video flowing, converts to the timestamp in the first video file in the first preceding and adjacent video file.
Such as: crystal oscillator frequency 1920, the playing duration 21ms of corresponding every frame video data frame.The first video after cutting
File is 8 points of 0 second 20 minutes to 8 points 0 second 25 minutes video files, and the first video file is before and in the first adjacent video file
In video flowing the timestamp of last frame video data frame be 8 points 0 second 15 minutes, then the first of the first video file video flowing
8 points of timestamp of frame video data frame be scaled within 0 second 20 minutes 8 points 15 minutes 21 milliseconds, successively modify the first video file video flowing
In every frame video data frame timestamp.
As it can be seen that being cut according to timestamp to video flowing in source video file, and in the embodiment of the present invention according to crystalline substance
Vibration frequency is to the timestamp of video flowing converts in the first video file after cutting, this ensure that the first video text after switching
Part broadcast time it is correct, improve improve editing backsight frequency file play quality.
Below by operating process set into specific embodiment, the method that the embodiment of the present disclosure provides is illustrated.
Embodiment one, in the present embodiment, the video playing rate of source video file is 25FPS, i.e., 25 frames of broadcasting per second regard
Frequency data frame, i.e., the play time of every frame are 40ms.It is at 8 points since play time to one section to tie within 0 second 0 minute to 9 points 0 second 0 minute
The source video file of beam is cut, and is obtained a period of time stamp as 8 points and is started within 0 second 5 minutes first to 8 points of 30 milliseconds of end in 10 minutes
Video file.Referring to Fig. 3, the process of video clipping includes: in the present embodiment
Step 301: receiving the cutting comprising the point of contact time and instruct, wherein the point of contact time includes: initial time at the end of
Between.
Cutting instruction in the point of contact time be respectively 8 points 0 second 5 minutes and 8 points 10 minutes 30 milliseconds.
Step 302: obtaining each current video data frame in source video file with point of contact time match.
When the timestamp of a video data frame in source video file video flowing is greater than or equal to the starting in the time of point of contact
Between, and be less than in the time of point of contact end time when, video data frame is determined as current video data frame, obtains current video
Data frame.I.e. the timestamp of video data frame be greater than or equal to 8 points 0 second 5 minutes, and less than 8 points 10 minutes 30 milliseconds, by video data
Frame is determined as current video data frame, obtains current video data frame.
Step 303: the end time for judging the point of contact time is next view after the timestamp of current video data frame
Before the timestamp of frequency data frame? if so, executing step 304, otherwise, step 305 is executed.
The end time of point of contact time may be placed exactly among the play time of one-frame video data frame, therefore, when cutting
When the end time of point time is located among the play time of one-frame video data frame, step 304 is executed, otherwise, executes step
305。
Step 304: abandoning current video data frame.
Since the end time of point of contact time is located among the play time of one-frame video data frame, in order to reduce to subsequent
The influence of the conversion of the timestamp of first video file can abandon current video data frame.
Step 305: according to crystal oscillator frequency, convert to the timestamp of video flowing in the first video file after switching,
Determine the play time of the first video file.
If the end time of point of contact time is located among the play time of one-frame video data frame, the current video has been abandoned
It is after data frame, then complete when the play time of last frame video data frame, then broadcasting for subsequent first video file is not influenced
Put 8 points of the timestamp of last frame video data frame in the conversion of time, such as the video flowing of preceding first video file 9 minutes
9960ms.In the video flowing of so next first video file the timestamp of first frame video data frame then from 8 points 0 second 10 minutes
Start.
As it can be seen that the video data frame of imperfect broadcasting is abandoned in the present embodiment, it can be in order to subsequent video data
The modification of the timestamp of frame still can completely be played according to video data frame and be modified, and improved and improved editing rear video text
The play quality of part.
Embodiment two, in the present embodiment, the video playing rate of source video file is 25FPS, i.e., 25 frames of broadcasting per second regard
Frequency data frame, i.e., the play time of every frame are 40ms.It is at 8 points since play time to one section to tie within 0 second 0 minute to 9 points 0 second 0 minute
The source video file of beam is cut, and is obtained a period of time stamp as 8 points and is started within 0 second 5 minutes first to 8 points of 30 milliseconds of end in 10 minutes
Video file.Referring to fig. 4, the process of video clipping includes: in the present embodiment
Step 401: receiving the cutting comprising the point of contact time and instruct, wherein the point of contact time includes: initial time at the end of
Between.
Cutting instruction in the point of contact time be respectively 8 points 0 second 5 minutes and 8 points 10 minutes 30 milliseconds.
Step 402: obtaining each current video data frame in source video file with point of contact time match.
The timestamp of video data frame be greater than or equal to 8 points 0 second 5 minutes, and less than 8 points 10 minutes 30 milliseconds, by video data
Frame is determined as current video data frame, obtains current video data frame.
Step 403: the end time for judging the point of contact time is next view after the timestamp of current video data frame
Before the timestamp of frequency data frame? if so, executing step 404, otherwise, step 408 is executed.
The end time of point of contact time may be placed exactly among the play time of one-frame video data frame, therefore, when cutting
When the end time of point time is located among the play time of one-frame video data frame, step 404 is executed, otherwise, executes step
408.Such as: the end time of point of contact time be 8 points 10 minutes 30 milliseconds, and the timestamp of current video data frame be 8 points 10 minutes 0
Second, the timestamp of next video data frame be 8 points 10 minutes 40 milliseconds, it is clear that the end time of point of contact time is located at current video
Among the play time of data frame, step 404 is executed.
Step 404: the relative difference between the end time of point of contact time and the timestamp of current video data frame is obtained,
And the frame per second according to video render, obtain mean time value.
Such as: the end time of point of contact time be 8 points 10 minutes 30 milliseconds, and the timestamp of current video data frame be 8 points
10 points 0 second, relative difference between the two is 30 milliseconds.And the frame per second of video render is 25FPS, and the play time of every frame
For 40ms, thus, mean time value can be 20 milliseconds.
Step 405: judging that relative difference is greater than mean time value? it is no to then follow the steps if executing step 406
407。
The present embodiment handles the current video data frame comprising cut point using the strategy to round up.
Step 406: retaining current video data frame.
If relative difference between the two, which is 30 milliseconds, is greater than 20 milliseconds of average value, retain current video data frame.
Step 407: abandoning current video data frame.
If relative difference between the two, which is 10 milliseconds, is less than 20 milliseconds of average value, current video data frame is abandoned.When
So, equal to when can also abandon current video data frame
Step 408: according to crystal oscillator frequency, convert to the timestamp of video flowing in the first video file after switching,
Determine the play time of the first video file.
If the end time of point of contact time is located among the play time of one-frame video data frame, the current video is remained
It is after data frame, then complete when the play time of last frame video data frame, then broadcasting for subsequent first video file is not influenced
Put 8 points of the timestamp of last frame video data frame in the conversion of time, such as the video flowing of preceding first video file 10 minutes
0ms.In the video flowing of so next first video file the timestamp of first frame video data frame then from 8 points 10 minutes 40 milliseconds
Start.Certainly, after discarding in the video flowing of next first video file the timestamp of first frame video data frame then from 8: 10
Divide 0 second and starts.
As it can be seen that the video data frame of imperfect broadcasting is abandoned or is retained, all may make video in the present embodiment
Data frame completely plays, and improves the play quality for improving editing backsight frequency file.
Following is embodiment of the present disclosure, can be used for executing embodiments of the present disclosure.
According to the process of above-mentioned video clipping, a kind of device of video clipping can be constructed, as shown in figure 5, the device includes:
It include: receiving unit 510, processing unit 520 and scaling unit 530, wherein
Receiving unit 510 instructs, wherein the point of contact time includes: initial time for receiving the cutting comprising the point of contact time
And the end time.
Processing unit 520, the video data for timestamp and point of contact time match to video flowing in source video file
Frame is handled, and the first video file after cutting to source video file is obtained.
Scaling unit 530, for changing the timestamp in the first video file after switching according to crystal oscillator frequency
It calculates, determines the play time of the first video file.
In one embodiment of the invention, as shown in fig. 6, processing unit 520 comprises determining that subelement 521 and obtains subelement
522.Wherein,
Subelement 521 is determined, for being greater than or equal to when the timestamp of a video data frame in source video file video flowing
Initial time in the time of point of contact, and be less than the point of contact time in end time when, video data frame is determined as current video
Data frame.
Subelement 522 is obtained, for obtaining current video data frame.
In one embodiment of the invention, as shown in fig. 7, processing unit 520 further include: abandon subelement 523.Abandon subelement
523, after being located at the timestamp of current video data frame for the end time when the point of contact time, next video data frame when
Between stab before when, abandon current video data frame.
In one embodiment of the invention, as shown in figure 8, processing unit further include: selection subelement 524.And select subelement
524, after the end time for the point of contact time is located at the timestamp of current video data frame, the time of next video data frame
When before stamp, the relative difference between the end time of point of contact time and the timestamp of current video data frame is obtained；According to view
The frame per second of frequency stream broadcasting obtains mean time value；If relative difference is greater than and mean time value, retain current video data frame；
If relative difference is less than or equal to mean time value, current video data frame is abandoned.
In one embodiment of the invention, as shown in figure 9, scaling unit 530 includes: that duration determines subelement 531 and conversion
Unit 532.
Duration determines subelement, for determining the playing duration of every frame video data frame according to crystal oscillator frequency；
Convert subelement, for according to before playing duration and the first video file and the first adjacent video file
Timestamp, convert to the timestamp of video flowing in the first video file.
As it can be seen that the device of video clipping of the embodiment of the present invention can cut video flowing in source video file according to timestamp
It cuts, and according to crystal oscillator frequency to the timestamp of video flowing converts in the first video file after cutting, this ensure that cutting
The correct of rear first video file broadcast time is changed, the play quality for improving editing backsight frequency file is improved.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The shape for the computer program product implemented in usable storage medium (including but not limited to magnetic disk storage and optical memory etc.)
Formula.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (2)
1. a kind of method of video clipping characterized by comprising
It receives the cutting comprising the point of contact time to instruct, wherein the point of contact time includes: initial time and end time；
The video data frame of the timestamp and the point of contact time match of video flowing in source video file is handled, is obtained pair
First after the source video file is cut cuts video file；
According to crystal oscillator frequency, converts, determine to the timestamp of video flowing in the first cutting video file after switching
The play time of the first cutting video file；
It is described to be converted according to crystal oscillator frequency to the timestamp of video flowing in the first cutting video file after switching,
Determine it is described first cutting video file play time include:
The playing duration of every frame video data frame is determined according to crystal oscillator frequency；
It is regarded according to before the playing duration and the first cutting video file and in the second adjacent cutting video file
The timestamp of frequency stream converts to the timestamp in the first cutting video file；
The video data frame to video flowing timestamp in source video file and the point of contact time match carries out processing
When the timestamp of a video data frame in the source video file video flowing is greater than or equal to rising in the point of contact time
Begin the time, and be less than the point of contact time in end time when, the video data frame is determined as current video data frame；
Obtain the current video data frame；
Abandon or retain the current video data frame；
The discarding retains the current video data frame, comprising:
After the end time of the point of contact time being located at the timestamp of the current video data frame, next video data frame
Timestamp before when, abandon the current video data frame；Or
The discarding retains the current video data frame and includes:
After the end time of the point of contact time being located at the timestamp of the current video data frame, next video data frame
Timestamp before when, obtain the phase between the end time of the point of contact time and the timestamp of the current video data frame
To difference；
According to the frame per second of the video render, the mean time value for playing every frame video frame is obtained；
If the relative difference be greater than with the mean time value, retain the current video data frame；
If the relative difference is less than or equal to the mean time value, the current video data frame is abandoned.
2. a kind of device of video clipping characterized by comprising
Receiving unit, for receive include the point of contact time cutting instruct, wherein the point of contact time include: initial time and
End time；
Processing unit, for video flowing in source video file timestamp and the point of contact time match video data frame into
Row processing obtains the first cutting video file after cutting to the source video file；
Scaling unit, for changing the timestamp in the first cutting video file after switching according to crystal oscillator frequency
It calculates, determines the play time of the first cutting video file；
The scaling unit includes:
Duration determines subelement, for determining the playing duration of every frame video data frame according to crystal oscillator frequency；
Convert subelement, for according to before the playing duration and the first cutting video file and adjacent second
The timestamp for cutting video file converts to the timestamp of video flowing in the first cutting video file；
The processing unit includes:
It determines subelement, is greater than or equal to for the timestamp when a video data frame in the source video file video flowing described
Initial time in the time of point of contact, and be less than the point of contact time in end time when, the video data frame is determined as
Current video data frame；
Subelement is obtained, for obtaining the current video data frame；
The processing unit is also used to abandon or retain the current video data frame；
The processing unit further include:
Abandon subelement, for when the point of contact time end time be located at the current video data frame timestamp it
When afterwards, before the timestamp of next video data frame, the current video data frame is abandoned；Or
The processing unit further include:
Subelement is selected, after the end time for the point of contact time is located at the timestamp of the current video data frame,
When before the timestamp of next video data frame, obtain the point of contact time end time and the current video data frame
Relative difference between timestamp；According to the frame per second of the video render, the mean time value for playing every frame video frame is obtained；
If the relative difference be greater than with the mean time value, retain the current video data frame；If the relative difference is less than
Or it is equal to the mean time value, abandon the current video data frame.
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| CN109068163B (en) * | 2018-08-28 | 2021-01-29 | 青岛一舍科技有限公司 | Audio and video synthesis system and synthesis method thereof |
| CN113095202A (en) * | 2021-04-07 | 2021-07-09 | 中国工商银行股份有限公司 | Data segmentation method and device in double-record data quality inspection |
| CN113095204B (en) * | 2021-04-07 | 2022-09-02 | 中国工商银行股份有限公司 | Double-recording data quality inspection method, device and system |
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Denomination of invention: A method and device for video editing Effective date of registration: 20210104 Granted publication date: 20190426 Pledgee: Inner Mongolia Huipu Energy Co.,Ltd. Pledgor: WUXI TVMINING MEDIA SCIENCE & TECHNOLOGY Co.,Ltd. Registration number: Y2020990001517 |
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