CN109905765A - Video retroactive method and device - Google Patents
Video retroactive method and device Download PDFInfo
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- CN109905765A CN109905765A CN201711310202.6A CN201711310202A CN109905765A CN 109905765 A CN109905765 A CN 109905765A CN 201711310202 A CN201711310202 A CN 201711310202A CN 109905765 A CN109905765 A CN 109905765A
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Abstract
The present invention provides a kind of video retroactive method and device.The method is applied to electronic equipment, which comprises obtains video of divulging a secret, wherein the variable quantity of the pixel set of the video of divulging a secret is related with user information of divulging a secret to the relationship of time；Original video corresponding with the video of divulging a secret is obtained to obtain key frame information；Multipair key frame is obtained from the video of divulging a secret according to the key frame information, and time difference corresponding with each pair of key frame is calculated；The user information of divulging a secret is obtained according to multiple time differences, realizes the retrospect to the video of divulging a secret.User information of divulging a secret can be obtained to corresponding time difference by obtaining each key frame in video of divulging a secret as a result,.
Description
Technical field
The present invention relates to fields of communication technology, in particular to a kind of video retroactive method and device.
Background technique
Direct video information of the image of video monitoring camera shooting as primary scene, has very high information valence
Value cannot be issued arbitrarily to public sphere.However as behaviour such as the universal and cell-phone camera of smart phone, publication videos
The simplicity of work, so that the phenomenon that video is divulged a secret by mobile phone photographed screen is extremely serious.
Generally video is traced using OSD denotation approach at present.However, being directed to this mode, blabber can have
Meaning is covered or is avoided in plain text, to destroy video tracing information.If in the picture by plaintext load, while guaranteeing that size is sufficiently large
To avoid covered or avoid in plain text, then daily monitoring user can be interfered to watch image.
Summary of the invention
In order to overcome above-mentioned deficiency in the prior art, technical problem to be solved by the invention is to provide a kind of videos to chase after
It traces back method and device, when can not there is no OSD mark in video of divulging a secret, by obtaining in video of divulging a secret each key frame to right
The time difference answered can be obtained user information of divulging a secret.
The embodiment of the present invention provides a kind of video retroactive method, is applied to electronic equipment, which comprises
Acquisition is divulged a secret video, wherein the variable quantity and the relationship of time of the pixel set of the video of divulging a secret and use of divulging a secret
Family information is related；
Original video corresponding with the video of divulging a secret is obtained to obtain key frame information；
Multipair key frame is obtained from the video of divulging a secret according to the key frame information, and is calculated and each pair of key
The corresponding time difference of frame；
The user information of divulging a secret is obtained according to multiple time differences, realizes the retrospect to the video of divulging a secret.
The embodiment of the present invention also provides a kind of video retrospective device, is applied to electronic equipment, and described device includes:
First obtains module, divulges a secret video for obtaining, wherein the variable quantity of the pixel set of the video of divulging a secret and when
Between relationship it is related to user information of divulging a secret；
Second obtains module, for obtaining original video corresponding with the video of divulging a secret to obtain key frame information；
Computing module for obtaining multipair key frame from the video of divulging a secret according to the key frame information, and calculates
Obtain time difference corresponding with each pair of key frame；
Processing module, for obtaining the user information of divulging a secret according to multiple time differences, realization is divulged a secret to described
The retrospect of video.
In terms of existing technologies, the invention has the following advantages:
The embodiment of the present invention provides a kind of video retroactive method and device.The method is applied to electronic equipment.It obtains first
Take divulge a secret video and original video corresponding with the video of divulging a secret, wherein the variable quantity of the pixel set of the video of divulging a secret
Related with user information of divulging a secret to the relationship of time, the original video includes key frame information.And then according to the key frame
Information obtains multipair key frame corresponding with the key frame information from the video of divulging a secret, and is calculated and each pair of key
The corresponding time difference of frame.Finally multiple time differences are handled to obtain the user information of divulging a secret, are realized to institute
State the retrospect for video of divulging a secret.Thus, it is possible to which by obtaining, each key frame is to corresponding time difference in video of divulging a secret, to obtain
Must divulge a secret user information, avoid when not identified for the display of video retrospect in the video of divulging a secret that screen mode is divulged a secret by taking the photograph
The case where cannot achieve video retrospect.
For enable invention above objects, features, and advantages be clearer and more comprehensible, present pre-ferred embodiments are cited below particularly, and
Cooperate appended attached drawing, is described in detail below.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the block diagram of electronic equipment provided in an embodiment of the present invention.
Fig. 2 is one of the flow diagram of video retroactive method provided in an embodiment of the present invention.
Fig. 3 is the flow diagram for the sub-step that step S230 includes in Fig. 2.
Fig. 4 is the flow diagram for the sub-step that step S240 includes in Fig. 2.
Fig. 5 is the two of the flow diagram of video retroactive method provided in an embodiment of the present invention.
Fig. 6 is the flow diagram for the sub-step that step S100 includes in Fig. 5.
Fig. 7 is the flow diagram for the sub-step that sub-step S120 includes in Fig. 6.
Fig. 8 is the flow diagram for the sub-step that sub-step S121 includes in Fig. 7.
Fig. 9 is the flow diagram for the sub-step that sub-step S130 includes in Fig. 6.
Figure 10 is the schematic diagram of time interval sequence provided in an embodiment of the present invention.
Figure 11 is one of the flow diagram of sub-step that sub-step S132 includes in Fig. 9.
Figure 12 is the two of the flow diagram for the sub-step that sub-step S132 includes in Fig. 9.
Figure 13 is sequence of frames of video schematic diagram before and after encryption provided in an embodiment of the present invention.
The block diagram of retrospective device when Figure 14 is provided in an embodiment of the present invention.
Figure 15 is the block diagram of encrypting module in Figure 14.
Icon: 100- electronic equipment；110- memory；120- storage control；130- processor；200- video retrospect dress
It sets；210- encrypting module；211- acquisition of information submodule；212- original video acquisition submodule；213- encrypts submodule；220-
First obtains module；230- second obtains module；240- computing module；250- processing module.
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause
This, is not intended to limit claimed invention to the detailed description of the embodiment of the present invention provided in the accompanying drawings below
Range, but it is merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.Meanwhile of the invention
In description, term " first ", " second " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
With reference to the accompanying drawing, it elaborates to some embodiments of the present invention.In the absence of conflict, following
Feature in embodiment and embodiment can be combined with each other.
Fig. 1 is please referred to, Fig. 1 is the block diagram of electronic equipment 100 provided in an embodiment of the present invention.The electronic equipment
100 may be, but not limited to, smart phone, tablet computer, desktop computer etc..The electronic equipment 100 includes: memory
110, storage control 120, processor 130 and video retrospective device 200.
It is directly or indirectly electrically connected between the memory 110, storage control 120 and each element of processor 130,
To realize the transmission or interaction of data.For example, these elements can pass through one or more communication bus or signal wire between each other
It realizes and is electrically connected.Video retrospective device 200 is stored in memory 110, the video retrospective device 200 includes at least one
The software function module that can be stored in the form of software or firmware (firmware) in the memory 110.The processor
130 software programs and module being stored in memory 110 by operation, such as the video retrospective device in the embodiment of the present invention
200, thereby executing various function application and data processing, i.e. video retroactive method in the realization embodiment of the present invention.
Wherein, the memory 110 may be, but not limited to, random access memory (Random Access
Memory, RAM), read-only memory (Read Only Memory, ROM), programmable read only memory (Programmable
Read-Only Memory, PROM), erasable read-only memory (Erasable Programmable Read-Only
Memory, EPROM), electricallyerasable ROM (EEROM) (Electric Erasable Programmable Read-Only
Memory, EEPROM) etc..Wherein, memory 110 is for storing program, the processor 130 after receiving and executing instruction,
Execute described program.The processor 130 and other possible components can control the access of memory 110 in the storage
It is carried out under the control of device 120.
The processor 130 may be a kind of IC chip, the processing capacity with signal.Above-mentioned processor
130 can be general processor, including central processing unit (Central Processing Unit, CPU), network processing unit
(Network Processor, NP) etc..It can also be digital signal processor (DSP), specific integrated circuit (ASIC), scene
Programmable gate array (FPGA) either other programmable logic device, discrete gate or transistor logic, discrete hardware group
Part.It may be implemented or execute disclosed each method, step and the logic diagram in the embodiment of the present invention.General processor can be with
It is that microprocessor or the processor are also possible to any conventional processor etc..
It is appreciated that structure shown in FIG. 1 is only to illustrate, electronic equipment 100 may also include it is more than shown in Fig. 1 or
Less component, or with the configuration different from shown in Fig. 1.Each component shown in Fig. 1 can using hardware, software or its
Combination is realized.
Referring to figure 2., Fig. 2 is one of the flow diagram of video retroactive method provided in an embodiment of the present invention.The side
Method is applied to the electronic equipment 100.The detailed process of video retroactive method is described in detail below.
Step S210 obtains video of divulging a secret.
In the present embodiment, the user that divulges a secret can shoot a video in a manner of screen to take the photograph by smart phone, tablet computer etc.
Shooting video is obtained, and then is divulged a secret.After discovery video is got compromised, the shooting video is handled to obtain view of divulging a secret
Frequency Videophone.Wherein, the processing may include, but be not limited to, and deduct divulge a secret video and video correction from shooting video
Deng.Video of divulging a secret is deducted to refer to environmental factor removing unrelated with the video of divulging a secret in the shooting video.
In the present embodiment, the variable quantity of the pixel set of the video of divulging a secret and the relationship of time and user information of divulging a secret
It is related.
Step S220 obtains original video corresponding with the video of divulging a secret to obtain key frame information.
In the present embodiment, it divulges a secret described in the acquisition after video, based on video acquisition and the video of divulging a secret of divulging a secret
Corresponding original video.Wherein, the original video may include digital video code stream and key frame information etc..The video counts
Character code stream same camera corresponding with the video of divulging a secret.
Step S230 obtains multipair key frame from the video of divulging a secret according to the key frame information, and is calculated
Time difference corresponding with each pair of key frame.
In the present embodiment, the key frame information includes the first object pixel set of each pair of key frame, the second target
Pixel set and corresponding object variations amount.Wherein, each pair of key frame includes two frame key frames: the first key frame and the second key
Frame.The first object pixel set is the selected pixels set in first key frame, second object pixel
Collection is combined into the second key frame pixel set corresponding with the first object pixel set.The object variations amount is described the
One object pixel set is by first key frame to the variable quantity of second key frame.
Referring to figure 3., the flow diagram for the sub-step that step S230 includes in Fig. 3 Fig. 2.Step S230 can wrap enclosed tool
Step S231, sub-step S232 and sub-step S233.
Sub-step S231 is obtained from multiple image corresponding with the video of divulging a secret according to the first object pixel set
Take the first key frame.
In the present embodiment, by the video Video that divulges a secretphoneIt is converted into image sequence pFrame frame by framex, Jin Ergen
According to the first object pixel set from pFramexThe first key frame of middle acquisition.
Wherein, the first object pixel set can only include a pixel sub-set, also may include multiple pixels
Subclass.When the first object pixel set includes multiple pixel sub-sets, can more rapidly, accurately from pFramex
The first key frame of middle acquisition.
Sub-step S232, according to first key frame, object variations amount, first object pixel set and the second target picture
Element set obtains the second key frame from multiple image corresponding with the video of divulging a secret.
In the present embodiment, it is based on pFramexDescribed in multiframe consecutive image after the first key frame, calculate described first
Object pixel is integrated into the variable quantity in the multiframe consecutive image.In the variable quantity and the object pixel set being calculated
When closest or identical, using the corresponding frame image of the variable quantity as the second key frame.
It, can also be second according to the second object pixel set assisted lookup in the embodiment of the present embodiment
Key frame.
Sub-step S233 calculates the time difference between first key frame and the second key frame, obtains and key frame
To corresponding time difference.
In the present embodiment, multipair key frame successively can be obtained from the video of divulging a secret in the manner described above, in turn
The multiple and key frame being sequentially arranged is obtained to corresponding time difference.For example, video of divulging a secret includes in chronological order
Video-frequency band 1, the video-frequency band 2 of arrangement then include first pair of key frame in video-frequency band 1, then include second pair of key in video-frequency band 2
Frame can obtain and the corresponding time difference of first pair of key frame and time difference corresponding with second pair of key frame in a manner described
Value.Wherein, video-frequency band 1 and video-frequency band 2 can be spaced an at least frame image, can also be with direct neighbor.
Step S240 obtains the user information of divulging a secret according to multiple time differences, realizes to the video of divulging a secret
Retrospect.
Referring to figure 4., Fig. 4 is the flow diagram for the sub-step that step S240 includes in Fig. 2.Step S240 may include
Sub-step S241 and sub-step S242.
Sub-step S241 filters out minimum time difference in multiple time differences by comparing.
Sub-step S242 handles to obtain user's letter of divulging a secret according to the minimum time difference and multiple time differences
Breath.
In the present embodiment, by the minimum time value in multiple time differences and each time difference in multiple time differences
Value is compared, and then carries out the operation such as being rounded, the user information of divulging a secret indicated with acquisition with numeric form.
For example, the multiple time differences obtained in the manner described above are as follows: pT1、pT2、pT2、pT3、pT4、pT5, multiple times
Minimum time difference is pT in differencemin.According to formulaThe every place value for obtaining user information of divulging a secret, into
And obtain user information of divulging a secret: IDuser=Value1,Value2,Value3,Value4,Value5。
Since the variable quantity of the pixel set of the video of divulging a secret is related with user information of divulging a secret to the relationship of time, because
This still can basis even if video is leaked out in a manner of taking the photograph screen, and does not have the OSD of plaintext or cipher text in screen
The time difference of key frame pair obtains user information of divulging a secret, to realize that video traces.
Referring to figure 5., Fig. 5 is the two of the flow diagram of video retroactive method provided in an embodiment of the present invention.In step
Before S210, the method can also include step S100.
User information is added in the original video by step S100, to obtain encrypted video.
Fig. 6 is please referred to, Fig. 6 is the flow diagram for the sub-step that step S100 includes in Fig. 5.Step S100 may include
Sub-step S110, sub-step S120 and sub-step S130.
Sub-step S110 receives the video call instruction of input, obtains user's letter corresponding with the video call instruction
Breath.
In the present embodiment, it when receiving the video call instruction of input, obtains corresponding with the video call instruction
User information.Wherein, the user information can be User ID or other can be used to indicate that the identification information of user identity.
Sub-step S120 obtains the original video.
Fig. 7 is please referred to, Fig. 7 is the flow diagram for the sub-step that sub-step S120 includes in Fig. 6.Sub-step S120 can be with
Including sub-step S121 and sub-step S122.
Sub-step S121, obtains corresponding with video call instruction digital video code stream, and from the digital video
Successively selection obtains multipair key frame in code stream, and obtains key frame information corresponding with the multipair key frame.
In the present embodiment, after obtaining digital video code stream corresponding with the video call instruction, institute can be based on
State the key frame pair that user information obtains respective numbers from the digital video code stream, with obtain include digital video code stream and
The original video of key frame information.Wherein, selection obtains multipair key frame sequentially in time.
Fig. 8 is please referred to, Fig. 8 is the flow diagram for the sub-step that sub-step S121 includes in Fig. 7.Sub-step S121 can be with
Including sub-step S1211 and sub-step S1212.
Sub-step S1211 selects a frame image as the first key frame from the digital video code stream, and from described
Selection obtains first object pixel set in one key frame.
In the present embodiment, arbitrarily select a frame image as from the multiple image of the digital video code stream first
First key frame of a pair of of key frame, and from described first in a manner of specific image, particular color pixel set, fixed position etc.
Selected pixels set is as the first object pixel set in key frame.
Sub-step S1212 obtains the second key frame and with described first from the multiple image after first key frame
The corresponding object variations amount of object pixel set and the second object pixel set.
In the embodiment of the present embodiment, based on the continuous multiple frames image after first key frame, described the is calculated
One object pixel is integrated into the variable quantity in continuous multiple frames image in every frame image.Wherein, the variable quantity can be shape and change
Change, change in location, color change etc..
When the variable quantity meets default variable quantity threshold value, the variable quantity of the default variable quantity threshold value will be met
As the object variations amount, and will frame image corresponding with the object variations amount as second key frame, and by institute
Pixel set corresponding with the first object pixel set is stated in the second key frame as the second object pixel set.By making
The object variations amount meets default variable quantity threshold value, can be in order to obtaining second key frame in video of divulging a secret.
In the another embodiment of the present embodiment, since variable quantity can be can be set by accumulated time
One preset interval time.According to it is corresponding with first key frame at the time of and the preset interval time obtain a moment value,
And then will frame image corresponding with the moment value as the second key frame, and obtain the second object pixel set and target and become
Change amount.Wherein, the preset interval time can be set according to the actual situation, such as 1 second.
Next based on the multiple image after first pair of key frame, repeating sub-step S1211 and S1212 can be from institute
It states and successively obtains multipair key frame in digital video code stream.
The key frame information is added in the digital video code stream and obtains the original video by sub-step S122.
In the embodiment of the present embodiment, it can also be added to each pair of key frame as the key frame information together
In the digital video code stream.
In the embodiment of the present embodiment, the key frame information that the electronic equipment 100 will acquire is added to institute
It states in digital video code stream, obtains the original video, and the original video is stored, to divulge a secret in generation video
When retrospect video when use.
In the another embodiment of the present embodiment, the electronic equipment 100 is according to the video call instruction and use
Family information sends video call request to camera.Other between camera or the electronic equipment 100 and the camera
Equipment (for example, medium distribution device) obtains the key frame information, and the key frame information is added to the video counts
To obtain the original video in character code stream, and the original video is sent to the electronic equipment 100.
Sub-step S130 changes the variable quantity of pixel set and time in the original video according to the user information
Relationship, to obtain encrypted video.
Fig. 9 is please referred to, Fig. 9 is the flow diagram for the sub-step that sub-step S130 includes in Fig. 6.Sub-step S130 can be with
Including sub-step S131 and sub-step S132.
Sub-step S131, based on time difference of any pair of key frame in the original video in multipair key frame by institute
It states user information and is converted to time interval sequence.
In the present embodiment, the user information is indicated with numerical value, and converts corresponding time interval for each numerical value
Value, to obtain time interval sequence.Wherein, the proportionate relationship of each time interval value and the user in the time interval sequence
Information is related.
Figure 10 is please referred to, Figure 10 is the schematic diagram of time interval sequence provided in an embodiment of the present invention.For example, using numerical tabular
The user information ID shownuserIt is 34212, Value1=3, Value2=4, Value3=2, Value4=1, Value5=2.According to
Time difference Δ t and formula T of any pair of key frame in the original video in the multipair key frame of selectionn=Valuen×
(k × Δ t) obtains multiple time interval values: T1、T2、T3、T4、T5, and then obtain time interval sequence shown in Figure 10.Wherein, scheme
K=1/2 in time interval sequence shown in 10.K indicates that minimum time interval unit accounts for the ratio of Δ t, and numerical value can arbitrarily be set.
Sub-step S132, successively according to each time interval value change in the original video variable quantity of pixel set and when
Between relationship, to obtain encrypted video.
In the present embodiment, successively become according to the target that each time interval value changes each pair of key frame in the original video
The corresponding relationship of change amount and time encrypts the original video according to the user information with realizing.Below with basis
First bit value of the user information change in the original video for the variable quantity of pixel set and the relationship of time into
Row illustrates.
Figure 11 is please referred to, Figure 11 is one of the flow diagram of sub-step that sub-step S132 includes in Fig. 9.Sub-step
S132 may include sub-step S1321, sub-step S1322, sub-step S1323 and sub-step S1324.
Sub-step S1321 calculates the frame number in time interval value.
In the present embodiment, according to frame per second and time interval value T1Obtain time interval value T1Interior frame number F.Wherein, frame
Rate indicates the frame number of broadcasting per second.For example, frame per second is 24 frames/second, the frame number F in the corresponding time interval value is 24T1。
Sub-step S1322, it is all between first key frame and the second key frame from being obtained in the original video
Frame image, and grabbed frame by frame and the first object based on all frame images between first key frame and the second key frame
The corresponding multiple pixel sets of pixel set.
Sub-step S1323, according in object variations amount corresponding with the first object pixel set and time interval
Frame number carries out interpolation to multiple pixel sets of crawl, obtains encryption set image frame sequence.
Encryption set image frame sequence is blended into first key frame to described the by sub-step S1324 one by one
On all frame images between two key frames.
In the present embodiment, the first key frame and the second key frame based on first pair of key frame, from the original video
Image in obtain by first key frame to second key frame all frame images.Described crucial by described first
Frame grabs multiple pixels corresponding with the first object pixel set into all frame images of second key frame frame by frame
Gather (including first object pixel set and second object pixel set).Become according to the multiple pixel set, the target
Change amount and time interval value T corresponding with first pair of key frame1Interior frame number F carries out interpolation, obtains encryption integrated images
Frame sequence.Image frame sequence is gathered by the encryption and by all frame images of first key frame to second key frame
Synthesis obtains encrypted video section corresponding with first pair of key frame, that is, corresponding with first bit value of user information
Encrypted video section.
Wherein, when grabbing multiple pixel sets corresponding with the first object pixel set frame by frame, if described first
Object pixel set includes multiple pixel sub-sets, then can only grab collection corresponding with one of pixel sub-set frame by frame
It closes.
In the embodiment of the present embodiment, the method that asymptotics can be used carries out interpolation, obtains encryption set figure
As frame sequence.Wherein, the method may be, but not limited to, quadratic linear interpolation algorithm, bicubic interpolation etc..
Next for the image after first pair of key frame in the original video, repeating above-mentioned interpolation procedure be can be obtained
Encrypted video corresponding with the user information bits per inch value.
Aforesaid way changes the time OSD of original video, jumps the number of seconds of the time OSD in the image shown
It is not correct time number of seconds jump.By the relationship between OSD jump and original image frame, the time difference is calculated.Pass through one
The relativity in user information between each bit value is calculated in the time difference of sequence, and then obtains user information.
In the embodiment of the present embodiment, interpolation can also be carried out for entire frame image.
Figure 12 is please referred to, Figure 12 is the two of the flow diagram for the sub-step that sub-step S132 includes in Fig. 9.Sub-step
S132 may include sub-step 1321, sub-step 1326 and sub-step 1327.
Sub-step 1321 calculates the frame number in time interval value.
Sub-step 1326, from all frames obtained in the original video between first key frame and the second key frame
Image.
Sub-step 1327, according to the frame in object variations amount corresponding with the first object pixel set and time interval
It is several that interpolation is carried out by first key frame to all frame images between second key frame in the original video.
In the present embodiment, according to frame per second and time interval value T1Obtain time interval value T1Interior frame number F.Based on
The first key frame and the second key frame of a pair of of key frame are obtained from the image of the original video by first key frame
To all frame images of second key frame.And then using for by the way of entire frame image interpolation, become according to the target
Change amount, by first key frame to second key frame all frame images and it is corresponding with first pair of key frame when
Between spacing value T1Interior frame number F carries out interpolation, obtains encrypted video section corresponding with first pair of key frame, that is, with institute
State the corresponding encrypted video section of the first bit value of user information.
By changing the specific pixel set in video characteristically (shape, color etc.) between variable quantity and time
User information is attached in this variation relation by relationship.Still retain user information after video screen shot as a result, thus real
Existing video retrospect.Wherein, the change of this relationship can be the interpolation based on whole frame, change the sequence of frames of video of original video；
It is also possible to be attached in the sequence of frames of video of original video after one of pixel set is carried out interpolation change.
Figure 13 is please referred to, Figure 13 is sequence of frames of video schematic diagram before and after encryption provided in an embodiment of the present invention.In Figure 13,
The first object pixel set includes pa0And pb0.In the sequence of frames of video of the original video, the first key frame Frame0
With the second key frame FrameΔtBetween time interval be Δ t, be played to the second key frame FrameΔtWhen, pa0Variable quantity reach
To Δ pa, become paΔt, pb0Variable quantity reaches Δ pb, become pbΔt。
In the sequence of frames of video of the corresponding encrypted video, it is being played to and the first key frame Frame0Distance
The frame Frame of Δ tΔtWhen, pb0Variable quantity reaches Δ pb, become pbΔt, and pa0Variable quantity is not up to Δ pa, reach t0+T1Moment
When, pa0Variable quantity reaches Δ pa, become paΔt.The time difference of first key frame and the second key frame becomes T from Δ t1, and add
The corresponding time difference of each pair of key frame is related to user information in close video, therefore can be when video is got compromised, according to view
The corresponding time difference of each pair of key frame obtains user information in frequency, realizes video retrospect, while will not interfere daily monitoring
User watches video.
Figure 14 is please referred to, Figure 14 is the block diagram of video retrospective device 200 provided in an embodiment of the present invention.The view
Frequency retrospective device 200 is applied to the electronic equipment 100.The video retrospective device 200 may include the first acquisition module
220, second module 230, computing module 240 and processing module 250 are obtained.
First obtains module 220, for obtaining video of divulging a secret.
Wherein, the variable quantity of the pixel set of the video of divulging a secret is related with user information of divulging a secret to the relationship of time.
In the present embodiment, the first acquisition module 220 is used to execute the step S210 in Fig. 2, about described first
The specific descriptions for obtaining module 220 are referred to the description of step S210 in Fig. 2.
Second obtains module 230, for obtaining original video corresponding with the video of divulging a secret to obtain key frame information.
In the present embodiment, the second acquisition module 230 is used to execute the step S220 in Fig. 2, about described second
The specific descriptions for obtaining module 230 are referred to the description of step S220 in Fig. 2.
Computing module 240 for obtaining multipair key frame from the video of divulging a secret according to the key frame information, and is counted
Calculation obtains time difference corresponding with each pair of key frame.
Each pair of key frame includes two frame key frames, and the key frame information includes the first object set of pixels of each pair of key frame
It closes, the second object pixel set and corresponding object variations amount, the computing module 240 is according to the key frame information from described
It divulges a secret and obtains multipair key frame in video, and the mode that time difference corresponding with each pair of key frame is calculated includes:
The first key is obtained from multiple image corresponding with the video of divulging a secret according to the first object pixel set
Frame；
According to first key frame, object variations amount, first object pixel set and the second object pixel set from
The second key frame is obtained in the corresponding multiple image of the video of divulging a secret；
The time difference between first key frame and the second key frame is calculated, is obtained with key frame to the corresponding time
Difference.
In the present embodiment, the computing module 240 is used to execute the step S230 in Fig. 2, about the computing module
240 specific descriptions are referred to the description of step S230 in Fig. 2.
Processing module 250, for obtaining the user information of divulging a secret according to multiple time differences, realization is let out to described
The retrospect of close video.
In the present embodiment, the processing module 250 is used to execute the step S240 in Fig. 2, about the processing module
250 specific descriptions are referred to the description of step S240 in Fig. 2.
Referring once again to Figure 14, the video retrospective device 200 can also include encrypting module 210.The encrypting module
210 for user information to be added in the original video, to obtain encrypted video.
Figure 15 is please referred to, Figure 15 is the block diagram of encrypting module 210 in Figure 14.The encrypting module 210 can wrap
Include acquisition of information submodule 211, original video acquisition submodule 212 and encryption submodule 213.
Acquisition of information submodule 211, video call instruction for receiving input obtain and the video call instruction pair
The user information answered.
Original video acquisition submodule 212, for obtaining the original video.
Submodule 213 is encrypted, for changing the variable quantity of pixel set in the original video according to the user information
With the relationship of time, to obtain encrypted video.
The encryption submodule 213 according to the user information change in the original video variable quantity of pixel set with
The relationship of time includes: in a manner of obtaining encrypted video
Based on time difference of any pair of key frame in the original video in multipair key frame by the user information
Be converted to time interval sequence, wherein the proportionate relationship of each time interval value and the user believe in the time interval sequence
Manner of breathing closes；
Successively change the relationship of the variable quantity of pixel set and time in the original video according to each time interval value, with
Obtain encrypted video.
In the present embodiment, the encrypting module 210 is used to execute the step S100 in Fig. 5, about the encrypting module
210 specific descriptions are referred to the description of step S100 in Fig. 5.
In conclusion the present invention provides a kind of video retroactive method and device.The method is applied to electronic equipment.First
Acquisition is divulged a secret video and original video corresponding with the video of divulging a secret, wherein the variation of the pixel set of the video of divulging a secret
Amount is related with user information of divulging a secret to the relationship of time, and the original video includes key frame information.And then according to the key
Frame information obtains multipair key frame corresponding with the key frame information from the video of divulging a secret, and is calculated and each pair of pass
The corresponding time difference of key frame.Finally multiple time differences are handled to obtain the user information of divulging a secret, realization pair
The retrospect of the video of divulging a secret.Thus, it is possible to by obtaining each key frame of divulging a secret in video to corresponding time difference, thus
Acquisition is divulged a secret user information, avoids identifying by taking the photograph the display in the video of divulging a secret that screen mode is divulged a secret not for video retrospect
When cannot achieve video retrospect the case where.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (14)
1. a kind of video retroactive method, which is characterized in that be applied to electronic equipment, which comprises
Acquisition is divulged a secret video, wherein the variable quantity and the relationship of time of the pixel set of the video of divulging a secret and user's letter of divulging a secret
Manner of breathing closes；
Original video corresponding with the video of divulging a secret is obtained to obtain key frame information；
Multipair key frame is obtained from the video of divulging a secret according to the key frame information, and is calculated and each pair of key frame pair
The time difference answered；
The user information of divulging a secret is obtained according to multiple time differences, realizes the retrospect to the video of divulging a secret.
2. the method according to claim 1, wherein the key frame information includes the first mesh of each pair of key frame
Mark pixel set, the second object pixel set and corresponding object variations amount, each pair of key frame includes two frame key frames, and described
When obtaining multipair key frame from the video of divulging a secret according to the key frame information, and being calculated corresponding with each pair of key frame
Between difference the step of include:
The first key frame is obtained from multiple image corresponding with the video of divulging a secret according to the first object pixel set；
According to first key frame, object variations amount, first object pixel set and the second object pixel set from it is described
The second key frame is obtained in the corresponding multiple image of video of divulging a secret；
The time difference between first key frame and the second key frame is calculated, is obtained with key frame to the corresponding time difference
Value.
3. the method according to claim 1, wherein described obtain described divulge a secret according to multiple time differences
The step of user information includes:
Minimum time difference in multiple time differences is filtered out by comparing；
It is handled to obtain the user information of divulging a secret according to the minimum time difference and multiple time differences.
4. according to the method described in claim 2, it is characterized in that, the method also includes:
User information is added in the original video, to obtain encrypted video；
Described that user information is added in the original video, to obtain encrypted video the step of includes:
The video call instruction of input is received, user information corresponding with the video call instruction is obtained；
Obtain the original video；
Change the relationship of the variable quantity of pixel set and time in the original video, according to the user information to be encrypted
Video.
5. according to the method described in claim 4, it is characterized in that, the step of acquisition original video include:
Digital video code stream corresponding with the video call instruction is obtained, and is successively selected from the digital video code stream
To multipair key frame, and obtain key frame information corresponding with the multipair key frame, wherein key frame is to quantity and the use
Family information is related；
The key frame information is added in the digital video code stream and obtains the original video.
6. according to the method described in claim 5, it is characterized in that, described successively select to obtain from the digital video code stream
Multipair key frame, and the step of obtaining key frame information corresponding with the multipair key frame includes:
It selects a frame image as the first key frame from the digital video code stream, and is selected from first key frame
To first object pixel set；
The second key frame and corresponding with the first object pixel set is obtained from the multiple image after first key frame
Object variations amount and the second object pixel set.
7. according to the method described in claim 6, it is characterized in that, being obtained in the multiple image from after first key frame
The step of taking the second key frame and object variations amount corresponding with the first object pixel set and the second object pixel set
Include:
Based on the continuous multiple frames image after first key frame, the first object pixel set is calculated in continuous multiple frames image
In variable quantity in every frame image；
When the variable quantity meets default variable quantity threshold value, will meet the variable quantity of the default variable quantity threshold value as
The object variations amount, and will frame image corresponding with the object variations amount as second key frame, and by described
Pixel set corresponding with the first object pixel set is as the second object pixel set in two key frames.
8. according to the method described in claim 5, it is characterized in that, described change the original video according to the user information
The variable quantity of middle pixel set and the relationship of time, to obtain encrypted video the step of include:
The user information is converted based on time difference of any pair of key frame in the original video in multipair key frame
For time interval sequence, wherein the proportionate relationship of each time interval value and the user information phase in the time interval sequence
It closes；
Change the relationship of the variable quantity of pixel set and time in the original video, according to each time interval value successively to obtain
Encrypted video.
9. according to the method described in claim 8, it is characterized in that, described change the original video according to each time interval value
The step of variable quantity and the relationship of time of middle pixel set includes:
Calculate the frame number in time interval value；
From all frame images obtained in the original video between first key frame and the second key frame, and based on described
All frame images between first key frame and the second key frame grab corresponding more with the first object pixel set frame by frame
A pixel set；
According to the frame number in object variations amount corresponding with the first object pixel set and time interval to the multiple of crawl
Pixel set carries out interpolation, obtains encryption set image frame sequence；
Encryption set image frame sequence is blended into first key frame to the institute between second key frame one by one
Have on frame image.
10. according to the method described in claim 8, it is characterized in that, described change the original view according to each time interval value
The step of relationship of the variable quantity of pixel set and time, includes: in frequency
Calculate the frame number in time interval value；
From all frame images obtained in the original video between first key frame and the second key frame；
According to the frame number in object variations amount corresponding with the first object pixel set and time interval to the original view
Interpolation is carried out by first key frame to all frame images between second key frame in frequency.
11. a kind of video retrospective device, which is characterized in that be applied to electronic equipment, described device includes:
First obtains module, divulges a secret video for obtaining, wherein the variable quantity of the pixel set of the video of divulging a secret and time
Relationship is related to user information of divulging a secret；
Second obtains module, for obtaining original video corresponding with the video of divulging a secret to obtain key frame information；
Computing module for obtaining multipair key frame from the video of divulging a secret according to the key frame information, and is calculated
Time difference corresponding with each pair of key frame；
Processing module is realized for obtaining the user information of divulging a secret according to multiple time differences to the video of divulging a secret
Retrospect.
12. device according to claim 11, which is characterized in that each pair of key frame includes two frame key frames, the key
Frame information includes the first object pixel set of each pair of key frame, the second object pixel set and corresponding object variations amount, institute
It states computing module and multipair key frame is obtained from the video of divulging a secret according to the key frame information, and be calculated and each pair of pass
The mode of the corresponding time difference of key frame includes:
The first key frame is obtained from multiple image corresponding with the video of divulging a secret according to the first object pixel set；
According to first key frame, object variations amount, first object pixel set and the second object pixel set from it is described
The second key frame is obtained in the corresponding multiple image of video of divulging a secret；
The time difference between first key frame and the second key frame is calculated, is obtained with key frame to the corresponding time difference
Value.
13. device according to claim 12, which is characterized in that described device further include:
Encrypting module, for user information to be added in the original video, to obtain encrypted video；
The encrypting module includes:
Acquisition of information submodule, video call instruction for receiving input obtain use corresponding with the video call instruction
Family information；
Original video acquisition submodule, for obtaining the original video；
Submodule is encrypted, for changing the variable quantity of pixel set and time in the original video according to the user information
Relationship, to obtain encrypted video.
14. device according to claim 13, which is characterized in that the encryption submodule changes according to the user information
The relationship of the variable quantity of pixel set and time in the original video includes: in a manner of obtaining encrypted video
The user information is converted based on time difference of any pair of key frame in the original video in multipair key frame
For time interval sequence, wherein the proportionate relationship of each time interval value and the user information phase in the time interval sequence
It closes；
Change the relationship of the variable quantity of pixel set and time in the original video, according to each time interval value successively to obtain
Encrypted video.
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