CN110430453A - Video multi code Rate of Chinese character switching handling method, device, electronic equipment and storage medium - Google Patents
Video multi code Rate of Chinese character switching handling method, device, electronic equipment and storage medium Download PDFInfo
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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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
- H04N21/23406—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving management of server-side video 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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
- H04N21/234381—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by altering the temporal resolution, e.g. decreasing the frame rate by frame skipping
-
- 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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/262—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
- H04N21/26208—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists the scheduling operation being performed under constraints
- H04N21/26216—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists the scheduling operation being performed under constraints involving the channel capacity, e.g. network bandwidth
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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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
- H04N21/2662—Controlling the complexity of the video stream, e.g. by scaling the resolution or bitrate of the video stream based on the client capabilities
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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
- H04N21/44—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
- H04N21/4402—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 reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440281—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 reformatting operations of video signals for household redistribution, storage or real-time display by altering the temporal resolution, e.g. by frame skipping
-
- H—ELECTRICITY
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- 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
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/845—Structuring of content, e.g. decomposing content into time segments
- H04N21/8456—Structuring of content, e.g. decomposing content into time segments by decomposing the content in the time domain, e.g. in time segments
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Abstract
The embodiment of the invention discloses a kind of video multi code Rate of Chinese character switching handling method, device, electronic equipment and storage mediums, which comprises obtains the first bandwidth of current slice in video；Obtain effective buffering duration in the buffer area of the video；Wherein, effective buffering duration includes the duration that the video slicing that has buffered is to be played in the buffer area of the video；The second bandwidth of next fragment is determined according to first bandwidth and effective buffering duration；The target bit rate of the next fragment is determined according to second bandwidth；Video code rate switching is carried out to the next fragment according to the target bit rate.The embodiment of the present invention is not only able to remove the trouble of user's manual switching from, and is capable of the variation of real-time perception current network, accomplishes both to make full use of bandwidth, gives client user experience as high as possible, while achieving the effect that guarantee to play fluency again.
Description
Technical field
The present invention relates to field of computer technology, and in particular to a kind of video multi code Rate of Chinese character switching handling method, device, electronics
Equipment and storage medium.
Background technique
At present in internet television field, following scheme is mainly used for the switching of video multi code Rate of Chinese character:
When user is when watching program, if wanting to watch the corresponding program of different clarity, the i.e. corresponding program of different code streams,
Widespread practice is that user oneself judges current Network status, according to current Network status by remote controler with manually side
Formula selects corresponding clarity to achieve the purpose that the program for watching different clarity, when network fluctuation is larger and user selects high definition
When clear degree viewing program, TV is easy to frequently enter buffer status.
On the one hand above scheme has the disadvantage in that, need user's manual switching, increases user's operation burden；Another party
Face, TV are easy to frequently enter buffer status, so that user's viewing experience is bad.
Summary of the invention
Aiming at the problems existing in the prior art, the embodiment of the present invention propose a kind of video multi code Rate of Chinese character switching handling method,
Device, electronic equipment and storage medium.
To solve the above problems, the embodiment of the invention provides following technical schemes:
In a first aspect, the embodiment of the invention provides a kind of video multi code Rate of Chinese character switching handling methods, comprising:
Obtain the first bandwidth of current slice in video；
Obtain effective buffering duration in the buffer area of the video；Wherein, effective buffering duration includes the view
The video slicing buffered in the buffer area of frequency duration to be played；
The second bandwidth of next fragment is determined according to first bandwidth and effective buffering duration；
The target bit rate of the next fragment is determined according to second bandwidth；
Video code rate switching is carried out to the next fragment according to the target bit rate.
Further, first bandwidth for obtaining current slice in video, specifically includes:
Obtain the average bandwidth of current slice in video；
According to the third bandwidth of the average bandwidth of the current slice and last fragment, the first band of current slice is obtained
It is wide；
Wherein, the average bandwidth for obtaining current slice in video, specifically includes:
The flat of current slice in video is obtained according to the downloading of the data volume of current slice in video and current slice is time-consuming
Equal bandwidth.
Further, described to be obtained in video according to the data volume of current slice in video and the downloading time-consuming of current slice
The average bandwidth of current slice, specifically includes:
The average bandwidth of current slice in video is obtained according to following first relational model:
Wherein, RcurrentFor the average bandwidth of current slice, StotalFor the data offset of current slice actual download,
SstartFor the data offset of current slice starting downloading, Stotal-SstartFor the data volume of current slice, γ is default influences
Coefficient, TendTo download end time, TstartTo download initial time, Tend-TstartIt is time-consuming for the downloading of current slice.
Further, described according to the average bandwidth of the current slice and the third bandwidth of last fragment, acquisition are worked as
First bandwidth of preceding fragment, specifically includes:
The first bandwidth of current slice is obtained according to following second relational model:
Rbandwidth=(1- φ) Rbandwidth'+φRcurrent
Wherein, RbandwidthFor the first bandwidth of current slice, Rbandwidth' be last fragment third bandwidth, Rcurrent
For the average bandwidth of current slice, φ is to preset to occupy coefficient, and the value range of φ is [0,1].
Further, effective buffering duration in the buffer area for obtaining the video, specifically includes:
Obtain the duration that downloading is currently accumulated in the buffer area of the video；
Obtain the playing duration consumed in the buffer area of the video；
The buffer area of the video is determined according to the duration of the current accumulation downloading and the playing duration consumed
Interior effective buffering duration；
Wherein, the duration that downloading is currently accumulated in the buffer area for obtaining the video, specifically includes:
The duration that downloading is currently accumulated in the buffer area of the video is obtained according to following third relational model:
Wherein, TtotalFor the duration for currently accumulating downloading, Ttotal' to end to the duration of last fragment accumulation downloading,
SdownloadFor the actual download size of current slice, SfileFor the total amount of data of current slice, TsegmentFor the duration of current slice.
Further, described according to first bandwidth and effective buffering duration determines the second band of next fragment
Width specifically includes:
Determine effective buffering duration to the impact factor of next fragment according to effective buffering duration；
First bandwidth is adjusted using the impact factor, obtains the second bandwidth of next fragment.
Further, described that influence of the effective buffering duration to next fragment is determined according to effective buffering duration
The factor specifically includes:
Determine effective buffering duration to the impact factor of next fragment according to following 5th relational model:
Wherein, σ is impact factor, TavailableEffectively to buffer duration, TunderflowFor preset standard fragment duration,
TsegmentFor the duration of current slice；
Correspondingly, described that first bandwidth is adjusted using the impact factor, obtain the second of next fragment
Bandwidth specifically includes:
The second bandwidth of next fragment is obtained according to following 6th relational model:
Rprobe=(1+ σ) * Rbandwidth
Wherein, RprobeFor the second bandwidth of next fragment, RbandwidthFor the first bandwidth of current slice.
Second aspect, the embodiment of the invention provides a kind of video multi code Rate of Chinese character switch processing devices, comprising:
First obtains module, for obtaining the first bandwidth of current slice in video；
Second obtains module, effective buffering duration in the buffer area for obtaining the video；Wherein, described effectively slow
Rush the video slicing buffered in the buffer area that duration includes the video duration to be played；
First determining module, for determining the second of next fragment according to first bandwidth and effective buffering duration
Bandwidth；
Second determining module, for determining the target bit rate of the next fragment according to second bandwidth；
Code rate switching module, for carrying out video code rate switching to the next fragment according to the target bit rate.
The third aspect the embodiment of the invention also provides a kind of electronic equipment, including memory, processor and is stored in
On reservoir and the computer program that can run on a processor, the processor realize such as first when executing the computer program
Video multi code Rate of Chinese character switching handling method described in aspect.
Fourth aspect, the embodiment of the invention also provides a kind of non-transient computer readable storage mediums, are stored thereon with
Computer program realizes video multi code Rate of Chinese character hand-off process side as described in relation to the first aspect when the computer program is executed by processor
Method.
As shown from the above technical solution, video multi code Rate of Chinese character switching handling method provided in an embodiment of the present invention, device, electronics
Equipment and storage medium are automatically determined down by the gentle effective buffering duration rushed in area of the first bandwidth of current slice in video
Second bandwidth of a fragment, then determines the target bit rate of next fragment according to the second bandwidth of next fragment, last under
The target bit rate of a fragment carries out video code rate switching to next fragment.It should be noted that it is provided in an embodiment of the present invention this
Kind automatically determines the second of next fragment by the gentle effective buffering duration rushed in area of the first bandwidth of current slice in video
Bandwidth, and then the method for carrying out code rate switching to next fragment according to the second bandwidth of next fragment, are not only able to remove user from
The trouble of manual switching, and it is capable of the variation of real-time perception current network, accomplish both to make full use of bandwidth, as far as possible to client
High user experience, while achieving the effect that guarantee to play fluency again.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these figures.
Fig. 1 is a kind of flow diagram for video multi code Rate of Chinese character switching handling method that one embodiment of the invention provides；
Fig. 2 is a kind of structural schematic diagram for video multi code Rate of Chinese character switch processing device that one embodiment of the invention provides；
Fig. 3 is the logic diagram for the electronic equipment that one embodiment of the invention provides.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Fig. 1 shows the flow chart of the video multi code Rate of Chinese character switching handling method of one embodiment of the invention offer, referring to Fig. 1,
Video multi code Rate of Chinese character switching handling method provided in an embodiment of the present invention, comprising:
Step 101: obtaining the first bandwidth of current slice in video；
In this step, the video can be the video being currently played.It should be noted that video is by multiple points
20 minutes videos then can be divided into 120 fragments for example, it is assumed that the length of each fragment is 10 seconds by piece composition.Working as here
Preceding fragment can be the fragment being currently played in video.
In this step, it should be noted that the first bandwidth of current slice can be corresponding with current slice in video
Estimate bandwidth, due to a current slice corresponding period (such as the current slice corresponding period is 22:10:15-22:
10:25), therefore, the first bandwidth can be bandwidth corresponding with the period, and since current slice includes that current slice has been broadcast
The part put and current slice unplayed part, therefore, bandwidth corresponding with current slice can only estimate bandwidth.
It is the average bandwidth by first calculating current slice, so in a kind of implementation of the subsequent introduction of the present embodiment
The third bandwidth of the average bandwidth and last fragment that recycle current slice afterwards estimates first bandwidth of current slice.When
So, in other implementations, mode can also be estimated using other and estimate the first bandwidth, for example, it is also possible to according to current point
The average bandwidth of piece estimates the first bandwidth (the first bandwidth=average bandwidth at this time).In addition, for the average bandwidth of current slice,
Subsequent embodiment also gives its specific acquisition modes.For example, can be according to the data volume of current slice in video and current point
The time-consuming average bandwidth for calculating current slice in video of the downloading of piece.
In addition, can also be other acquisition modes for the average bandwidth of current slice, for example, available current slice
The corresponding average bandwidth in played part (broadcast by the corresponding data volume in part and current slice that played according to current slice
The corresponding downloading time-consuming in the part put is calculated), the part that then played further according to current slice accounts for the ratio of current slice
The corresponding average bandwidth in part that example and current slice played, calculates the average bandwidth of current slice.For example, if current
The ratio that the played part of fragment accounts for current slice is greater than or equal to half, then the part that played current slice is right
Average bandwidth of the average bandwidth answered as current slice, if the ratio that the part that current slice played accounts for current slice is less than
Half then makees the corresponding average bandwidth in part that current slice played multiplied by predetermined coefficient (such as 0.85-0.95) afterwards
For the average bandwidth of current slice.
Step 102: obtaining effective buffering duration in the buffer area of the video；Wherein, effective buffering duration packet
Include the video slicing buffered in the buffer area of the video duration to be played.
In this step, it should be noted that in video display process, generally buffering has video slicing in buffer area.
Here the duration not played also in the video slicing cached is effective buffering duration in the buffer area.
Step 103: the second bandwidth of next fragment is determined according to first bandwidth and effective buffering duration.
In this step, after having determined that corresponding first bandwidth of current slice is gentle and rushing effective buffering duration in area,
It can be according to corresponding second bandwidth of the next fragment of the two parameter predictions.In this step, according to first bandwidth and
When effective buffering duration determines the second bandwidth of next fragment, can first have according to effective buffering duration determination
Then effect buffering duration recycles the impact factor to be adjusted first bandwidth impact factor of next fragment,
Obtain the second bandwidth of next fragment.
Step 104: the target bit rate of the next fragment is determined according to second bandwidth.
It in this step, can be according to when determining the target bit rate of the next fragment according to second bandwidth
The determining code rate with the second bandwidth match of two bandwidth, and using with the code rate of the second bandwidth match as the target of the next fragment
Code rate.In addition it is also possible to first determine the candidate code rate of the next fragment according to second bandwidth, then further according under described
The candidate code rate of a fragment and the comparing result of current slice code rate, determine the target bit rate of the next fragment.
Step 105: video code rate switching is carried out to the next fragment according to the target bit rate.
In this step, after determining target bit rate corresponding with next fragment according to second bandwidth, according to described
Target bit rate carries out video code rate switching to next fragment, as high as possible to client so as to accomplish both to make full use of bandwidth
User experience, while again achieve the effect that guarantee play fluency.
As described above it is found that video multi code Rate of Chinese character switching handling method provided in this embodiment, by video when
The gentle effective buffering duration rushed in area of first bandwidth of preceding fragment assesses the second bandwidth of next fragment automatically, to select to close
Suitable code rate carries out the switching of code rate, and then realizes the fluency that can guarantee broadcasting again on the basis of making full use of bandwidth.
As shown from the above technical solution, video multi code Rate of Chinese character switching handling method provided in an embodiment of the present invention, passes through video
The gentle effective buffering duration rushed in area of first bandwidth of middle current slice automatically determines the second bandwidth of next fragment, then root
The target bit rate of next fragment is determined according to the second bandwidth of next fragment, finally according to the target bit rate of next fragment to next point
Piece carries out video code rate switching.This pass through of current slice in video it should be noted that provided in an embodiment of the present invention
Effective buffering duration in one bandwidth and buffer area automatically determines the second bandwidth of next fragment, and then according to the of next fragment
The method that two bandwidth carry out code rate switching to next fragment, is not only able to remove the trouble of user's manual switching from, and can be real
When perceive current network variation, accomplish both to make full use of bandwidth, give client user experience as high as possible, while reaching guarantor again
Card plays the effect of fluency.
Content based on the above embodiment, in the present embodiment, above-mentioned steps 101 obtain first of current slice in video
Bandwidth can be specifically accomplished in that
Step 101a: the average bandwidth of current slice in video is obtained；
Step 101b: according to the third bandwidth of the average bandwidth of the current slice and last fragment, current point is obtained
First bandwidth of piece.
In the present embodiment, a kind of specific method of determination of the first bandwidth is given.In the present embodiment, it first obtains current
The average bandwidth of fragment obtains current point then further according to the third bandwidth of the average bandwidth of current slice and last fragment
First bandwidth of piece.What needs to be explained here is that the third bandwidth of last fragment is also using the first bandwidth with current slice
The third bandwidth of fragment that the same calculation obtains namely last is according to the average bandwidth of last fragment and last
What the 4th bandwidth of fragment obtained.
In the present embodiment, in the first bandwidth for determining current slice and meanwhile consider current slice average bandwidth and
Two factors of third bandwidth of last fragment, the reason is that, if only merely consider current slice average bandwidth, exist be easy by
To current of short duration network jitter effects, can not react the problem of overall network situation, thus the present embodiment is the of current slice
The third bandwidth of last fragment is introduced on the basis of one bandwidth, can preferably react current overall network situation.
In addition, for average bandwidth acquisition modes there are many kinds of, above example has been described above a kind of specific implementation
Mode, following example will be given for the detailed implementation of the part.
Content based on the above embodiment, in the present embodiment, current slice is flat in above-mentioned steps 101a acquisition video
Equal bandwidth can be specifically accomplished in that
Step 101a ': according to the data volume of current slice in video and the downloading time-consuming of current slice obtain in video when
The average bandwidth of preceding fragment.
In the present embodiment, view can be obtained according to the data volume of current slice in video and the downloading time-consuming of current slice
The average bandwidth of current slice in frequency.View is being obtained according to the data volume of current slice in video and the downloading time-consuming of current slice
It, can be according to the downloading time-consuming meter for the data volume and current slice that current slice has been downloaded in frequency when the average bandwidth of current slice
The average bandwidth of current slice is calculated, for example, the average band of current slice in video can be obtained according to following first relational model
It is wide:
Wherein, RcurrentFor the average bandwidth of current slice, StotalFor the data offset of current slice actual download,
SstartFor the data offset of current slice starting downloading, Stotal-SstartFor the data volume of current slice, γ is default influences
Coefficient, TendTo download end time, TstartTo download initial time, Tend-TstartIt is time-consuming for the downloading of current slice.
In the present embodiment, it in the average bandwidth for determining current slice, is making full use of the data volume for working as fragment and is working as
Except the downloading of preceding fragment is time-consuming, an influence coefficient is also introduced, by influencing the setting of coefficient, adjustable current slice
Network jitter when downloading, which calculates bring to average bandwidth, to be influenced.Specifically, influence coefficient gamma value range be from 0 to
1, it influences network jitter of the coefficient for adjusting current slice downloading when and bring influence is calculated on average bandwidth.Preferably, γ
Value is 0.8 namely 80% participation operation of current slice download, reduces network jitter when current slice downloading to average
Bandwidth calculation bring influences.It can be seen that in the present embodiment, current point can be reduced by the way that the default coefficient gamma that influences is arranged
Network jitter bring when piece is downloaded influences.
Content based on the above embodiment, in the present embodiment, above-mentioned steps 101b are averaged according to the current slice
The third bandwidth of bandwidth and last fragment obtains the first bandwidth of current slice, can specifically be accomplished in that
The first bandwidth of current slice is obtained according to following second relational model:
Rbandwidth=(1- φ) Rbandwidth'+φRcurrent
Wherein, RbandwidthFor the first bandwidth of current slice, Rbandwidth' be last fragment third bandwidth, Rcurrent
For the average bandwidth of current slice, φ is to preset to occupy coefficient, and the value range of φ is [0,1].
In the present embodiment, it according to the average bandwidth of current slice and the third bandwidth of last fragment, is estimating currently
When the first bandwidth of fragment, the second relational model recited above can be used.It can by analyzing the second relational model
Know, when estimating the first bandwidth of current slice using the second relational model, occupies coefficient using default, accounted for by adjusting default
There is the size of coefficient to can change the average bandwidth of current slice and the third bandwidth of last fragment to the first of current slice
The influence degree of bandwidth.To it is default occupy coefficient assignment when, can be set according to actual needs.In the present embodiment,
It needs to illustrate, due to the simple average bandwidth for only considering current slice, exists and be easy by of short duration network jitter shadow
It rings, the problem of overall network situation can not be reacted.Therefore, to solve this problem, occupy coefficient φ this embodiment introduces default,
In the range of from 0 to 1, which determines the assessment inspiration degree of the first bandwidth, and for value closer to 1, the first bandwidth of surface is closer
The average bandwidth of current slice, it is easier to be influenced by current network fluctuation.Occupy coefficient in practical application, can enable and preset
Value 0.7, because the numerical value can be obtained by verifying preferably estimates effect, so that estimation results are neither easy by current net
The influence of network fluctuation, and can more be truly reflected the actual size of the first bandwidth.
It can be seen that the adaptive dynamic switching method of video multi code Rate of Chinese character provided in this embodiment, it is contemplated that whole bandwidth
State, it is thus possible to the influence of network jitter bring be effectively reduced.
Content based on the above embodiment, in the present embodiment, above-mentioned steps 102 obtain in the buffer area of the video
Effectively buffering duration, can specifically be accomplished in that
Step 102a: the duration that downloading is currently accumulated in the buffer area of the video is obtained；
Step 102b: the playing duration consumed in the buffer area of the video is obtained；
Step 102c: the video is determined according to the duration of the current accumulation downloading and the playing duration consumed
Buffer area in effective buffering duration.
In the present embodiment, the specific implementation for obtaining and effectively buffering duration in buffer area is given, is specially first obtained
The duration for currently accumulating downloading in the buffer area of the video is taken, the broadcasting consumed in the buffer area of the video is then obtained
Duration, the last duration downloaded according to current accumulation and the playing duration consumed determine effective in the buffer area of the video
Buffer duration.
Wherein, when above-mentioned steps 102a currently accumulates the duration of downloading in the buffer area for obtaining the video, specifically may be used
It is accomplished in that
The duration that downloading is currently accumulated in the buffer area of the video is obtained according to following third relational model:
Wherein, TtotalFor the duration for currently accumulating downloading, Ttotal' to end to the duration of last fragment accumulation downloading,
SdownloadFor the actual download size of current slice, SfileFor the total amount of data of current slice, TsegmentFor the duration of current slice.
It is understood that SdownloadFor the actual download size of current slice, SfileFor the total amount of data of current slice, the two ratio is
Current slice actual download duration accounts for the ratio of total duration, then multiplied by the duration of current slice, available actual download point
Piece can sowing time it is long, then along with cut-off to last fragment accumulation downloading duration, can be obtained in buffer area and currently accumulate
The duration of downloading.
In the present embodiment, when currently accumulating the duration of downloading in the buffer area for determining video, using will currently divide
In piece actual download fragment can the mode that is superimposed of the sowing time long duration with cut-off to the accumulation downloading of last fragment obtain, it is this to change
It is simple and effective for processing mode, for each fragment, need to only calculate actual download fragment in current slice can sowing time it is long
.In addition, the present embodiment in calculating current slice actual download fragment can sowing time it is long when, using by current slice
Actual download size determines that current slice actual download duration accounts for the total of current slice divided by the mode of the total amount of data of current slice
The ratio of duration, then again by ratio multiplied by the mode of the duration of current slice, so as to obtain accurately preceding fragment
The calculated result that can be grown sowing time of middle actual download fragment.
Correspondingly, above-mentioned steps 102c is true according to the duration of the current accumulation downloading and the playing duration consumed
Effective buffering duration in the buffer area of the fixed video, can specifically be accomplished in that
Effective buffering duration in the buffer area of the video is determined according to following 4th relational model:
Tavailable=Ttotal-Tconsume
Wherein, TavailableEffectively to buffer duration, TtotalFor the duration for currently accumulating downloading, TconsumeIt has consumed
Playing duration.It should be noted that TconsumeAnd TtotalReference must be that identical time base just can be with.
In the present embodiment, the playing duration consumed is subtracted according to the duration of current accumulation downloading, is effectively buffered
Duration.
Content based on the above embodiment, in the present embodiment, above-mentioned steps 103 are according to first bandwidth and described have
Effect buffering duration determines the second bandwidth of next fragment, can specifically be accomplished in that
Step 103a: according to effective buffering duration determine the effective influence of the buffering duration to next fragment because
Son；
Step 103b: first bandwidth is adjusted using the impact factor, obtains the second band of next fragment
It is wide.
In the present embodiment, determining effective buffering duration to the shadow of next fragment according to effective buffering duration
It rings because of the period of the day from 11 p.m. to 1 a.m, can specifically be accomplished in that
Determine effective buffering duration to the impact factor of next fragment according to following 5th relational model:
Wherein, σ is impact factor, TavailableEffectively to buffer duration, TunderflowFor preset standard fragment duration,
TsegmentFor the duration of current slice；Wherein, preset standard fragment duration is usually the duration of a default fragment, such as 10s.
Correspondingly, above-mentioned steps 103b is adjusted first bandwidth using the impact factor, obtains next point
Second bandwidth of piece, can specifically be accomplished in that
The second bandwidth of next fragment is obtained according to following 6th relational model:
Rprobe=(1+ σ) * Rbandwidth
Wherein, RprobeFor the second bandwidth of next fragment, σ is impact factor, RbandwidthFor the first band of current slice
It is wide.
In the present embodiment, first determine effective buffering duration to the shadow of next fragment according to effective buffering duration
The factor is rung, then after determining effective buffering duration to the impact factor of next fragment, using impact factor to current point
First bandwidth of piece is modified, to obtain the second bandwidth of more reasonable and accurate next fragment.It follows that this reality
It applies example while considering the influence of buffered play duration and the first bandwidth to the second bandwidth, so as in the downloading of next fragment
More particularly suitable code rate is adjusted in time in the process, to reduce the probability that video falls into buffering.In addition, the present embodiment is creative
This reference factor of the buffering duration of ground use, compared to the code rate adaptive approach based on amount of buffered data, the present embodiment is used
The judgement of amount of buffered data is substituted in the condition of buffering duration, and reason is under same quantity of data, and different code rate fragment bufferings can
The duration of broadcasting is different, single to go to judge whether that switching code rate is inaccurate from data volume, uses buffering duration instead and makes a decision, can be more quasi-
The current buffer status of true feedback, can adjust code rate in time.In combination with the bandwidth calculation of adaptive algorithm, code rate is reduced
The number of switching, also takes full advantage of bandwidth, and experience is preferably played to client.
Content based on the above embodiment, in the present embodiment, above-mentioned steps 104 are according to second bandwidth determination
The target bit rate of next fragment can be specifically accomplished in that
Step 104a: the candidate code rate of the next fragment is determined according to second bandwidth；
Step 104b: according to the comparing result of the candidate code rate of the next fragment and current slice code rate, determine described in
The target bit rate of next fragment.
Content based on the above embodiment, in the present embodiment, above-mentioned steps 104a determine institute according to second bandwidth
The candidate code rate for stating next fragment, can specifically be accomplished in that
Second bandwidth and each default code rate are compared, choose closest with second bandwidth and are less than described
Candidate code rate of the default code rate of second bandwidth as the next fragment.
In the present embodiment, the assessment bandwidth of next fragment usually that is to say to each code in the second bandwidth and m3u8
Rate compares, and chooses the code rate smaller than the second bandwidth, is then neutralized the immediate code rate of the second bandwidth as next point
The candidate code rate of piece, both makes full use of bandwidth to reach, and gives client user experience as high as possible, while guaranteeing broadcasting again
The purpose of fluency.
Content based on the above embodiment, in the present embodiment, above-mentioned steps 104b is according to the candidate of the next fragment
The comparing result of code rate and current slice code rate determines the target bit rate of the next fragment, specifically can be real in the following way
It is existing:
If the candidate code rate of the next fragment is greater than current slice code rate, a upper grade for current slice code rate is selected
Target bit rate of other code rate as the next fragment；
If the candidate code rate of the next fragment is less than or equal to current slice code rate, according to the time of the next fragment
Code selection rate and the relationship of default lowest bit rate determine the target bit rate of the next fragment.For example, if the time of the next fragment
Code selection rate is less than or equal to the default lowest bit rate, then using the default lowest bit rate as the object code of the next fragment
Rate, otherwise, using the candidate code rate of the next fragment as the target bit rate of the next fragment.
In the present embodiment, for the smooth transition of picture and smooth effect, when the candidate code rate of determining next fragment
Greater than current slice code rate when, then select the code rate of a rank on current code rate as the target bit rate of next fragment；When
When the candidate code rate of determining next fragment is less than the code rate of current slice, then the candidate code rate of determining next fragment is selected to make
For the target bit rate of next fragment.If it is determined that next fragment candidate code rate be lower than lowest bit rate, then choose lowest bit rate
As the target bit rate of next fragment, the downloading of next fragment is completed.
In the present embodiment, it should be noted that for multi code Rate of Chinese character slice http stream media protocol, such as HLS, DASH,
HSS etc., the adaptive dynamic switching method of video multi code Rate of Chinese character provided through this embodiment can perceive active user's network change, do
It to bandwidth is both made full use of, gives client user experience as high as possible, while guaranteeing the fluency played again.
By above description it is found that video multi code Rate of Chinese character switching handling method provided in this embodiment, including two parts core
Content, a part are the appraisal procedures of the first bandwidth corresponding with current slice, and another part is to consider bandwidth calculation simultaneously
With the code rate adaptive algorithm of buffering duration.Thus, it can be known that the adaptive switching at runtime side of video multi code Rate of Chinese character provided in this embodiment
Method improves the bandwidth calculation of the code rate adaptive technique based on current bandwidth, it is contemplated that whole bandwidth status reduces net
Network is shaken bring and is influenced, and makes calculated result smooth-out.Buffered play duration is considered simultaneously, option code can be adjusted in time
Rate reduces the probability for falling into buffering.Compared to the code rate adaptive approach based on amount of buffered data, the present embodiment buffering duration
Condition the judgement of amount of buffered data is substituted, reason is under same quantity of data, different code rate fragments bufferings can play when
It is long different, it is single to go to judge whether that switching code rate is inaccurate from data volume, it uses buffering duration instead and makes a decision, can more accurately feed back
Current buffer status can adjust code rate in time.In combination with the bandwidth calculation of adaptive algorithm, time of code rate switching is reduced
Number, also takes full advantage of bandwidth, experience is preferably played to client.
Fig. 2 shows one embodiment of the invention provide video multi code Rate of Chinese character switch processing device structural schematic diagram, referring to
Fig. 2, video multi code Rate of Chinese character switch processing device provided in an embodiment of the present invention, comprising: first, which obtains module 11, second, obtains module
12, the first determining module 13, the second determining module 14 and code rate switching module 15, in which:
First obtains module 11, for obtaining the first bandwidth of current slice in video；
Second obtains module 12, effective buffering duration in the buffer area for obtaining the video；Wherein, described effective
Buffer the video slicing buffered in the buffer area that duration includes the video duration to be played；
First determining module 13, for determining the of next fragment according to first bandwidth and effective buffering duration
Two bandwidth；
Second determining module 14, for determining the target bit rate of the next fragment according to second bandwidth；
Code rate switching module 15, for carrying out video code rate switching to the next fragment according to the target bit rate.
Since video multi code Rate of Chinese character switch processing device provided in this embodiment can be used for executing described in above-described embodiment
Video multi code Rate of Chinese character switching handling method, since its working principle is similar with beneficial effect, therefore details are not described herein again, and particular content can
Referring to the description of above-described embodiment.
Based on identical inventive concept, further embodiment of this invention provides a kind of electronic equipment, referring to Fig. 3, the electricity
Sub- equipment specifically includes following content: processor 301, memory 302, communication interface 303 and communication bus 304；
Wherein, the processor 301, memory 302, communication interface 303 are completed each other by the communication bus 304
Communication；
The processor 301 is used to call the computer program in the memory 302, and the processor executes the meter
The Overall Steps of the above method are realized when calculation machine program, for example, realizing when the processor execution computer program following
Step: the first bandwidth of current slice in video is obtained；Obtain effective buffering duration in the buffer area of the video；Wherein,
Effective buffering duration includes the duration that the video slicing that has buffered is to be played in the buffer area of the video；According to described
First bandwidth and effective buffering duration determine the second bandwidth of next fragment；It is determined according to second bandwidth described next
The target bit rate of fragment；Video code rate switching is carried out to the next fragment according to the target bit rate.
Based on identical inventive concept, further embodiment of this invention provides a kind of non-transient computer readable storage medium
Matter is stored with computer program on the computer readable storage medium, which realizes above-mentioned when being executed by processor
The Overall Steps of method, for example, the processor realizes following step when executing the computer program: obtaining current in video
First bandwidth of fragment；Obtain effective buffering duration in the buffer area of the video；Wherein, effective buffering duration includes
The video slicing buffered in the buffer area of the video duration to be played；According to first bandwidth and described effectively slow
Rush the second bandwidth that duration determines next fragment；The target bit rate of the next fragment is determined according to second bandwidth；According to
The target bit rate carries out video code rate switching to the next fragment.
In addition, the logical order in above-mentioned memory can be realized and as independence by way of SFU software functional unit
Product when selling or using, can store in a computer readable storage medium.Based on this understanding, of the invention
Technical solution substantially the part of the part that contributes to existing technology or the technical solution can be with software in other words
The form of product embodies, which is stored in a storage medium, including some instructions use so that
One computer equipment (can be personal computer, server or the network equipment etc.) executes each embodiment institute of the present invention
State all or part of the steps of method.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-
Only Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can be with
Store the medium of program code.
The apparatus embodiments described above are merely exemplary, wherein described, unit can as illustrated by the separation member
It is physically separated with being or may not be, component shown as a unit may or may not be physics list
Member, it can it is in one place, or may be distributed over multiple network units.It can be selected according to the actual needs
In some or all of the modules realize the purpose of the embodiment of the present invention.Those of ordinary skill in the art are not paying wound
In the case where the labour for the property made, it can understand and implement.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
It realizes by means of software and necessary general hardware platform, naturally it is also possible to pass through hardware.Based on this understanding, on
Stating technical solution, substantially the part that contributes to existing technology can be embodied in the form of software products in other words, should
Computer software product may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, CD, including several fingers
It enables and using so that a computer equipment (can be personal computer, server or the network equipment etc.) executes each implementation
Method described in certain parts of example or embodiment.
In the description of the present invention, it should be noted that the orientation or positional relationship of the instructions such as term " on ", "lower" is base
In orientation or positional relationship shown in the drawings, it is merely for convenience of description of the present invention and simplification of the description, rather than indication or suggestion
Signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this
The limitation of invention.Unless otherwise clearly defined and limited, term " installation ", " connected ", " connection " shall be understood in a broad sense, example
Such as, it may be fixed connection or may be dismantle connection, or integral connection；It can be mechanical connection, be also possible to be electrically connected
It connects；It can be directly connected, the connection inside two elements can also be can be indirectly connected through an intermediary.For this
For the those of ordinary skill in field, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In addition, in the present invention, such as " first ", " second " is used for description purposes only, and it should not be understood as instruction or dark
Show relative importance or implicitly indicates the quantity of indicated technical characteristic.The feature of " first ", " second " is defined as a result,
It can explicitly or implicitly include at least one of the features.In the description of the present invention, the meaning of " plurality " is at least two,
Such as two, three etc., unless otherwise specifically defined.
In addition, in the present invention, relational terms such as first and second and the like be used merely to an entity or
Operation is distinguished with another entity or operation, and without necessarily requiring or implying between these entities or operation, there are any
This actual relationship or sequence.Moreover, the terms "include", "comprise" or its any other variant be intended to it is non-exclusive
Property include so that include a series of elements process, method, article or equipment not only include those elements, but also
Further include other elements that are not explicitly listed, or further include for this process, method, article or equipment it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including described
There is also other identical elements in the process, method, article or equipment of element.
In addition, in the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " tool
The description of body example " or " some examples " etc. mean specific features described in conjunction with this embodiment or example, structure, material or
Person's feature is included at least one embodiment or example of the invention.In the present specification, to the schematic table of above-mentioned term
It states and is necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with
It can be combined in any suitable manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this field
Technical staff can by the feature of different embodiments or examples described in this specification and different embodiments or examples into
Row combination and combination.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of video multi code Rate of Chinese character switching handling method characterized by comprising
Obtain the first bandwidth of current slice in video；
Obtain effective buffering duration in the buffer area of the video；Wherein, effective buffering duration includes the video
The video slicing buffered in buffer area duration to be played；
The second bandwidth of next fragment is determined according to first bandwidth and effective buffering duration；
The target bit rate of the next fragment is determined according to second bandwidth；
Video code rate switching is carried out to the next fragment according to the target bit rate.
2. video multi code Rate of Chinese character switching handling method according to claim 1, which is characterized in that current in the acquisition video
First bandwidth of fragment, specifically includes:
Obtain the average bandwidth of current slice in video；
According to the third bandwidth of the average bandwidth of the current slice and last fragment, the first bandwidth of current slice is obtained；
Wherein, the average bandwidth for obtaining current slice in video, specifically includes:
According to the time-consuming average band for obtaining current slice in video of the downloading of the data volume of current slice in video and current slice
It is wide.
3. video multi code Rate of Chinese character switching handling method according to claim 2, which is characterized in that described according to current in video
The data volume of fragment and the time-consuming average bandwidth for obtaining current slice in video of the downloading of current slice, specifically include:
The average bandwidth of current slice in video is obtained according to following first relational model:
Wherein, RcurrentFor the average bandwidth of current slice, StotalFor the data offset of current slice actual download, SstartFor
The data offset of current slice starting downloading, Stotal-SstartFor the data volume of current slice, γ is default influence coefficient,
TendTo download end time, TstartTo download initial time, Tend-TstartIt is time-consuming for the downloading of current slice.
4. video multi code Rate of Chinese character switching handling method according to claim 2 or 3, which is characterized in that described to work as according to
The third bandwidth of the average bandwidth of preceding fragment and last fragment obtains the first bandwidth of current slice, specifically includes:
The first bandwidth of current slice is obtained according to following second relational model:
Rbandwidth=(1- φ) Rbandwidth'+φRcurrent
Wherein, RbandwidthFor the first bandwidth of current slice, Rbandwidth' be last fragment third bandwidth, RcurrentIt is current
The average bandwidth of fragment, φ are to preset to occupy coefficient, and the value range of φ is [0,1].
5. video multi code Rate of Chinese character switching handling method according to claim 1, which is characterized in that the acquisition video
Effective buffering duration in buffer area, specifically includes:
Obtain the duration that downloading is currently accumulated in the buffer area of the video；
Obtain the playing duration consumed in the buffer area of the video；
It is determined in the buffer area of the video according to the duration of the current accumulation downloading and the playing duration consumed
Effectively buffering duration；
Wherein, the duration that downloading is currently accumulated in the buffer area for obtaining the video, specifically includes:
The duration that downloading is currently accumulated in the buffer area of the video is obtained according to following third relational model:
Wherein, TtotalFor the duration for currently accumulating downloading, Ttotal' it is duration of the cut-off to the accumulation downloading of last fragment, Sdownload
For the actual download size of current slice, SfileFor the total amount of data of current slice, TsegmentFor the duration of current slice.
6. video multi code Rate of Chinese character switching handling method according to claim 1, which is characterized in that described according to the first band
Wide and described effective buffering duration determines the second bandwidth of next fragment, specifically includes:
Determine effective buffering duration to the impact factor of next fragment according to effective buffering duration；
First bandwidth is adjusted using the impact factor, obtains the second bandwidth of next fragment.
7. video multi code Rate of Chinese character switching handling method according to claim 6, which is characterized in that described according to described effectively slow
It rushes duration and determines that effective buffering duration to the impact factor of next fragment, specifically includes:
Determine effective buffering duration to the impact factor of next fragment according to following 5th relational model:
Wherein, σ is impact factor, TavailableEffectively to buffer duration, TunderflowFor preset standard fragment duration, TsegmentFor
The duration of current slice；
Correspondingly, described that first bandwidth is adjusted using the impact factor, the second bandwidth of next fragment is obtained,
It specifically includes:
The second bandwidth of next fragment is obtained according to following 6th relational model:
Rprobe=(1+ σ) * Rbandwidth
Wherein, RprobeFor the second bandwidth of next fragment, RbandwidthFor the first bandwidth of current slice.
8. a kind of video multi code Rate of Chinese character switch processing device characterized by comprising
First obtains module, for obtaining the first bandwidth of current slice in video；
Second obtains module, effective buffering duration in the buffer area for obtaining the video；Wherein, when effective buffering
The video slicing buffered in the long buffer area including the video duration to be played；
First determining module, for determining the second band of next fragment according to first bandwidth and effective buffering duration
It is wide；
Second determining module, for determining the target bit rate of the next fragment according to second bandwidth；
Code rate switching module, for carrying out video code rate switching to the next fragment according to the target bit rate.
9. a kind of electronic equipment including memory, processor and stores the calculating that can be run on a memory and on a processor
Machine program, which is characterized in that the processor is realized as described in claim 1 to 7 is any when executing the computer program
Video multi code Rate of Chinese character switching handling method.
10. a kind of non-transient computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer
The video multi code Rate of Chinese character switching handling method as described in claim 1 to 7 is any is realized when program is executed by processor.
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| CN111935361A (en) * | 2020-07-10 | 2020-11-13 | 深圳威尔视觉传媒有限公司 | Video color ring interaction method and device, electronic equipment and storage medium |
| CN113055698A (en) * | 2021-03-09 | 2021-06-29 | 百果园技术(新加坡)有限公司 | Video parameter adjusting method, device, equipment and medium |
| CN112954409A (en) * | 2021-03-31 | 2021-06-11 | 百果园技术(新加坡)有限公司 | Video downloading method, device, server and storage medium |
| CN112954409B (en) * | 2021-03-31 | 2023-05-12 | 百果园技术(新加坡)有限公司 | Video downloading method, device, server and storage medium |
| CN113099273A (en) * | 2021-04-07 | 2021-07-09 | 中南大学 | Video block replacement method, client, server, system and readable storage medium based on opportunity strategy |
| CN113099273B (en) * | 2021-04-07 | 2021-12-14 | 中南大学 | Video block replacement method, client, server, system and readable storage medium based on opportunity strategy |
| CN115914756A (en) * | 2021-08-12 | 2023-04-04 | 花瓣云科技有限公司 | Video code rate control method and device based on network classification |
| WO2023051350A1 (en) * | 2021-09-29 | 2023-04-06 | 百果园技术(新加坡)有限公司 | Video playing grade determination method, video playing method, and related apparatuses |
| CN114979762A (en) * | 2022-04-12 | 2022-08-30 | 北京字节跳动网络技术有限公司 | Video downloading and transmission method, device, terminal equipment, server and medium |
| CN114979762B (en) * | 2022-04-12 | 2024-06-07 | 北京字节跳动网络技术有限公司 | Video downloading and transmitting method and device, terminal equipment, server and medium |
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