CN110267100A - Code rate switching method, device, electronic equipment and the storage medium of FLV video - Google Patents
Code rate switching method, device, electronic equipment and the storage medium of FLV video Download PDFInfo
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- 230000005611 electricity Effects 0.000 claims description 2
- 230000003044 adaptive effect Effects 0.000 abstract description 9
- 238000004891 communication Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000004590 computer program Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
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- 238000004364 calculation method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4331—Caching operations, e.g. of an advertisement for later insertion during playback
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4402—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
- H04N21/440263—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 spatial resolution, e.g. for displaying on a connected PDA
-
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/854—Content authoring
- H04N21/8547—Content authoring involving timestamps for synchronizing content
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Databases & Information Systems (AREA)
- Computer Security & Cryptography (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
Code rate switching method, device, electronic equipment and storage medium of the disclosure about a kind of FLV video, this method comprises: obtaining the current speed of download of current network downloading FLV video；Target bit rate is determined from preset multiple code rates according to current speed of download；Whether the current code rate according to the target bit rate and FLV video is identical, judges whether to need to carry out code rate switching；If necessary to carry out code rate switching, then after having downloaded the current GOP of current code rate, the downloading of the FLV video of current code rate is terminated, current code rate is switched to target bit rate.As it can be seen that the technical scheme provided by this disclosed embodiment, during FLV video playing, it may be implemented to switch over code rate according to the network environment of user is adaptive, to ensure that the continuity of user's viewing, effectively prevent the appearance of Caton.
Description
Technical field
This disclosure relates to field of video broadcasting technology more particularly to a kind of code rate switching method, device, the electricity of FLV video
Sub- equipment and storage medium.
Background technique
FLV (Flash Video, stream media format) is increasingly becoming the video playing mode of mainstream at present.FLV is by continuous
Data flow composition, basic unit be GOP (Group Of Picture, picture group), wherein the duration of a GOP be it is fixed,
That is the time interval between two I frames.
It is all by manually realizing currently, being switched in the related technology in the code rate to the FLV video in playing process
's.The height of code rate, be all it is reflected by the clarity of video playing, manually adjust code rate be exactly manually adjust it is clear
The process of degree.Typically: during carrying out FLV video playing by the clarity of user setting, if there is card
, user can be with the clarity of manual modification player, to guarantee the fluency of video playing.Such as: user is first arranged clear
Clear degree is high definition, occurs Caton during FLV video playing, the clarity of player is revised as marking by user manually
Clearly, that is, code rate is reduced to guarantee the fluency of video playing.The different code rates of the same video, with different downloadings
Location, the switching of switching code rate i.e. video download address.
As it can be seen that this video code rate switching method in the related technology, is after Caton appearance by manually switching over,
The continuity of video playing is not high enough.
Summary of the invention
The disclosure provides code rate switching method, device, electronic equipment and the storage medium of a kind of FLV video, at least to solve
The certainly problem not high enough in FLV video playing continuity in the related technology.The technical solution of the disclosure is as follows:
According to the first aspect of the embodiments of the present disclosure, a kind of code rate switching method of FLV video is provided, comprising:
Obtain the current speed of download of current network downloading FLV video；
Target bit rate is determined from preset multiple code rates according to the current speed of download；
Whether the current code rate according to the target bit rate and the FLV video is identical, judges whether to need to carry out code rate
Switching；
If necessary to carry out code rate switching, then after the current GOP for having downloaded the current code rate, termination is described to work as former code
The current code rate is switched to the target bit rate by the downloading of the FLV video of rate.
It is described according to the current speed of download in a kind of specific embodiment, from preset multiple code rates, determine
The step of target bit rate out, comprising:
The current speed of download will be less than and be determined as target with the smallest code rate of difference of the current speed of download
Code rate.
In a kind of specific embodiment, it is described according to the current code rate of the target bit rate and the FLV video whether
It is identical, judge whether to need the step of carrying out code rate switching, comprising:
Judge whether the code rate value of the current code rate of the target bit rate and the FLV video is identical；
If the code rate value of the current code rate of the target bit rate and the FLV video is not identical, judgement has currently been delayed
Whether the data to be played deposited meet preset switching condition；If the data to be played currently cached meet described preset
Switching condition then needs to carry out code rate switching；
If the code rate value of the current code rate of the target bit rate and the FLV video is identical, do not need to carry out code rate
Switching.
In a kind of specific embodiment, the preset switching condition are as follows:
When the code rate value of the current code rate is lower than the code rate value of the target bit rate, it is desirable that the number to be played cached
According to playing duration be greater than or equal to preset first caching duration, wherein the first caching duration be greater than GOP when
It is long；
When the code rate value of the current code rate is higher than the code rate value of the target bit rate, it is desirable that the number to be played cached
According to playing duration be less than preset second caching duration, wherein the second caching duration be greater than or equal to GOP when
It grows and is less than the first caching duration.
In a kind of specific embodiment, in the step of the current speed of download of the acquisition current network downloading FLV video
Before rapid, further includes:
Obtain the configuration file of the FLV video of current network downloading；Include in the configuration file: described preset multiple
The server address of each corresponding code rate value of code rate and the code rate value and the FLV video for preserving the code rate in code rate
Between corresponding relationship.
In a kind of specific embodiment, the described the step of current code rate is switched to the target bit rate, comprising:
From the configuration file, the address for preserving the destination server of FLV video of the target bit rate is obtained；
Obtain the corresponding object time stamp of next GOP after the current GOP；
It is stabbed according to the object time of acquisition, it is corresponding that Xiang Suoshu destination server issues the acquisition object time stamp
The video data of GOP downloads request, the code rate value comprising the target bit rate and the mesh in the video data downloading request
Mark timestamp；
Receive the video data that the destination server is sent, wherein the video data is the target bit rate
Middle timestamp is the video data of the FLV video of the current network downloading of object time stamp；
The video data received is stored to caching.
According to the second aspect of an embodiment of the present disclosure, a kind of code rate switching device of FLV video is provided, comprising:
Speed of download acquiring unit is configured as executing the current speed of download for obtaining current network downloading FLV video；
Determination unit is configured as executing and determines mesh from preset multiple code rates according to the current speed of download
Coding rate；
Judging unit, be configured as executing it is whether identical according to the current code rate of the target bit rate and the FLV video,
Judge whether to need to carry out code rate switching；
Switch unit is configured as executing when needing to carry out code rate switching, is downloading the current of the current code rate
After GOP, the downloading of the FLV video of the current code rate is terminated, the current code rate is switched to the target bit rate.
In a kind of specific embodiment, the determination unit is configured as executing:
The current speed of download will be less than and be determined as target with the smallest code rate of difference of the current speed of download
Code rate.
In a kind of specific embodiment, the judging unit is configured as executing:
Judge whether the code rate value of the current code rate of the target bit rate and the FLV video is identical；
If the code rate value of the current code rate of the target bit rate and the FLV video is not identical, judgement has currently been delayed
Whether the data to be played deposited meet preset switching condition；If the data to be played currently cached meet described preset
Switching condition then needs to carry out code rate switching；
If the code rate value of the current code rate of the target bit rate and the FLV video is identical, do not need to carry out code rate
Switching.
In a kind of specific embodiment, the preset switching condition are as follows:
When the code rate value of the current code rate is lower than the code rate value of the target bit rate, it is desirable that the number to be played cached
According to playing duration be greater than or equal to preset first caching duration, wherein the first caching duration be greater than GOP when
It is long；
When the code rate value of the current code rate is higher than the code rate value of the target bit rate, it is desirable that the number to be played cached
According to playing duration be less than preset second caching duration, wherein the second caching duration be greater than or equal to GOP when
It grows and is less than the first caching duration.
In a kind of specific embodiment, the code rate switching device of the FLV video, further includes:
Configuration file acquiring unit is configured as executing the configuration file for the FLV video for obtaining current network downloading；It is described
Include in configuration file: in preset multiple code rates each corresponding code rate value of code rate and the code rate value with preserve
Corresponding relationship between the server address of the FLV video of the code rate.
In a kind of specific embodiment, the switch unit is configured as executing:
From the configuration file, the address for preserving the destination server of FLV video of the target bit rate is obtained；
Obtain the corresponding object time stamp of next GOP after the current GOP；
It is stabbed according to the object time of acquisition, it is corresponding that Xiang Suoshu destination server issues the acquisition object time stamp
The video data of GOP downloads request；Code rate value comprising the target bit rate and the mesh in the video data downloading request
Mark timestamp；
Receive the video data that the destination server is sent, wherein the video data is the target bit rate
Middle timestamp is the video data of the FLV video of the current network downloading of object time stamp；
The video data received is stored to caching.
According to the third aspect of an embodiment of the present disclosure, a kind of electronic equipment is provided characterized by comprising
Processor；
For storing the memory of the processor-executable instruction；
Obtain the current speed of download of current network downloading FLV video；
Target bit rate is determined from preset multiple code rates according to the current speed of download；
Whether the current code rate according to the target bit rate and the FLV video is identical, judges whether to need to carry out code rate
Switching；
If necessary to carry out code rate switching, then after the current GOP for having downloaded the current code rate, termination is described to work as former code
The current code rate is switched to the target bit rate by the downloading of the FLV video of rate.
According to a fourth aspect of embodiments of the present disclosure, a kind of instruction when in the storage medium is provided by electronic equipment
When processor executes, so that electronic equipment is able to carry out following steps:
Obtain the current speed of download of current network downloading FLV video；
Target bit rate is determined from preset multiple code rates according to the current speed of download；
Whether the current code rate according to the target bit rate and the FLV video is identical, judges whether to need to carry out code rate
Switching；
If necessary to carry out code rate switching, then after the current GOP for having downloaded the current code rate, termination is described to work as former code
The current code rate is switched to the target bit rate by the downloading of the FLV video of rate.
The technical scheme provided by this disclosed embodiment at least bring it is following the utility model has the advantages that FLV video playing process
In, it realizes and code rate is switched over according to the network environment of user is adaptive.The technology provided due to embodiment of the disclosure
Scheme may be implemented during video playing, and according to the current network environment of user, adaptive switching plays video
Clarity plays video high-definition when network environment is good, when network environment difference that the broadcasting of video is clear
Clear degree adapts to the clarity of network environment at that time by automatically switching to for higher resolution, to ensure that the continuous of user's viewing
Property, effectively prevent the appearance of Caton.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
The disclosure can be limited.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the disclosure
Example, and together with specification for explaining the principles of this disclosure, do not constitute the improper restriction to the disclosure.
Fig. 1 is a kind of flow chart of the code rate switching method of FLV video shown according to an exemplary embodiment.
Fig. 2 is the flow chart of the code rate switching method of another kind FLV video shown according to an exemplary embodiment.
Fig. 3 is a kind of block diagram of the code rate switching device of FLV video shown according to an exemplary embodiment.
Fig. 4 is the block diagram of the code rate switching device of another kind FLV video shown according to an exemplary embodiment.
Fig. 5 is the block diagram of a kind of electronic equipment shown according to an exemplary embodiment.
Specific embodiment
In order to make ordinary people in the field more fully understand the technical solution of the disclosure, below in conjunction with attached drawing, to this public affairs
The technical solution opened in embodiment is clearly and completely described.
It should be noted that the specification and claims of the disclosure and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to embodiment of the disclosure described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.Embodiment described in following exemplary embodiment does not represent and disclosure phase
Consistent all embodiments.On the contrary, they are only and as detailed in the attached claim, the disclosure some aspects
The example of consistent device and method.
Fig. 1 is a kind of flow chart of the code rate switching method of FLV video shown according to an exemplary embodiment, such as Fig. 1
Shown, the code rate switching method of the FLV video is in client, comprising the following steps:
In step s101, the current speed of download of current network downloading FLV video is obtained.
In practical applications, before FLV video playing, player can first download the configuration file of the FLV video, therefrom obtain
The default server address of the FLV video is taken, and starts to play out from the server address foradownloaded video data.
In step s 102, target bit rate is determined from preset multiple code rates according to current speed of download.
In a kind of specific embodiment, object code is determined from preset multiple code rates according to current speed of download
The step of rate may include:
Current speed of download will be less than and be determined as target bit rate with the smallest code rate of the difference of current speed of download.
In step s 103, whether the current code rate according to the target bit rate and FLV video identical, judge whether to need into
The switching of row code rate.
In a kind of specific embodiment, whether the current code rate according to target bit rate and FLV video is identical, judges whether
The step of carrying out code rate switching is needed, may include:
Judge whether the code rate value of the current code rate of target bit rate and FLV video is identical；
If the code rate value of the current code rate of target bit rate and FLV video is not identical, judgement currently cached wait broadcast
Put whether data meet preset switching condition；If the data to be played currently cached meet preset switching condition,
It needs to carry out code rate switching；
If the code rate value of the current code rate of target bit rate and FLV video is identical, do not need to carry out code rate switching.
In practical applications, preset switching condition can be with are as follows:
When the code rate value of current code rate is lower than the code rate value of target bit rate, it is desirable that the broadcasting of the data to be played cached
Duration is greater than or equal to preset first caching duration, wherein the first caching duration is greater than the duration of a GOP；
When the code rate value of current code rate is higher than the code rate value of target bit rate, it is desirable that the broadcasting of the data to be played cached
Duration is less than preset second caching duration, wherein the second caching duration is greater than or equal to the duration of a GOP and less than first
Cache duration.
Wherein, the playing duration of the data to be played cached can be the data according to the data to be played cached
Amount and current code rate calculate acquisition.
In step S104, if necessary to carry out code rate switching, then after having downloaded the current GOP of current code rate, terminate
The downloading of the FLV video of current code rate, is switched to target bit rate for current code rate.
In a kind of specific embodiment, the step of current code rate is switched to target bit rate, may include:
From configuration file, the address for preserving the destination server of FLV video of target bit rate is obtained；
Obtain the corresponding object time stamp of next GOP after current GOP；
It is stabbed according to the object time of acquisition, the video counts of corresponding GOP is stabbed to the destination server sending acquisition object time
It is requested according to downloading；Code rate value comprising target bit rate and object time stamp in video data downloading request；
Receive the video data that destination server is sent, wherein the video data is that timestamp is target in target bit rate
The video data of the FLV video of the current network downloading of timestamp；
The video data received is stored to caching.
The technical scheme provided by this disclosed embodiment realizes the network according to user during FLV video playing
Environment self-adaption switches over code rate.Due to the technical scheme provided by this disclosed embodiment, may be implemented to broadcast in video
During putting, the clarity of video is played according to the adaptive switching of the current network environment of user, it is good in network environment
When play video high-definition, by the play clarity of video by the automatic of higher resolution when network environment difference
It is switched to the clarity for adapting to network environment at that time, to ensure that the continuity of user's viewing, effectively prevents going out for Caton
It is existing.
It is exemplified below a specific embodiment, the code rate switching method for the FLV video that the embodiment of the present disclosure provides is done
Further details of explanation.
Fig. 2 is the flow chart of the code rate switching method of another kind FLV video shown according to an exemplary embodiment, is such as schemed
Shown in 2, the code rate switching method of the FLV video, comprising the following steps:
In step s 201, the configuration file of the FLV video of current network downloading is obtained.
In this embodiment, FLV video can be live video.
In practical applications, before player obtains FLV video, understand and first obtain a configuration file, particularly one
Manifest file includes in the manifest file: the corresponding code rate value of each code rate and code rate in preset multiple code rates
Be worth and preserve the code rate FLV video server address i.e. download address between corresponding relationship.Usual player
The download address of a default can be selected to start to download FLV video, the download address of the usual default is preset multiple code rates
The corresponding download address of the minimum code rate of middle code rate.
In step S202, the current speed of download of current network downloading FLV video is obtained.
In a kind of specific embodiment, the method for obtaining the current speed of download of current network downloading FLV video can be with
It is: is compared with the data volume for downloading the FLV video within a preset period of time with preset time period, obtains current network and download FLV
The current speed of download of video.Such as: with the data volume for downloading the FLV video in 5 seconds divided by 5 seconds, obtain current network downloading
The current speed of download of FLV video.
In step S203, target bit rate is determined from preset multiple code rates according to current speed of download.
In general, the GOP time span of all code rates is identical in the same preset multiple code rates of FLV video；All code rates
The corresponding timestamp of GOP it is identical；The coded format of the corresponding data flow of all code rates is identical, such as: when the GOP of all code rates
Between length be all 3 seconds, the coded format of the corresponding data flow of all code rates is all H264 or is all H265 etc..
In a kind of specific embodiment, object code is determined from preset multiple code rates according to current speed of download
The step of rate may include:
Current speed of download will be less than and be determined as target bit rate with the smallest code rate of the difference of current speed of download.
In another specific embodiment, mesh can also be determined according to the following steps from preset multiple code rates
Coding rate:
According to current speed of download, determines and refer to speed of download；Wherein, it is less than current speed of download with reference to speed of download；
For each code rate, judge to subtract the difference after code rate with reference to speed of download, the current ratio with current speed of download
Whether value is in preset interval range；
If current ratio is in preset interval range, it is determined that the code rate is target bit rate.
In practical applications, according to current speed of download, determine that the mode with reference to speed of download can be with are as follows: will currently download
Speed is multiplied with the preset numerical value less than 100%, determines and refers to speed of download.Such as: by the 80% of current speed of download, really
It is set to reference to speed of download.
The calculation formula of ratio can be with are as follows:If the ratio is smaller, show that the code rate is closer
With reference to speed of download.It can will corresponding code rate be determined as when ratio minimum in preset range in a kind of specific embodiment
Target bit rate, the preset range can be 0 to the 10% of current speed of download.
Example 1: preset code rate has: 4000kpbs, 5000kpbs, 6000kpbs, 7500kpbs, current code rate
4000kpbs, current speed of download are 10240kpbs.With reference to the current speed of download=8192kpbs of speed of download=80%, by
InAccordingly, it is determined that 7500kpbs is target bit rate.
Example 1: preset code rate has: 4000kpbs, 5000kpbs, 6000kpbs, 7500kpbs, current code rate
6000kpbs, current speed of download are 7000kpbs.With reference to the current speed of download=5600kpbs of speed of download=80%, due to
Accordingly, it is determined that 5000kpbs is object code
Rate.
In step S204, the current code rate of FLV video is obtained.
In a kind of specific embodiment, it can be according to current speed of download, from preset multiple code rates, determine
Out before the step of target bit rate, the current code rate of FLV video is obtained.In another specific embodiment, it can also be
Before the current speed of download for obtaining current network downloading FLV video, the current code rate of FLV video is obtained.The embodiment of the present invention
The sequence for the step for not limiting the current code rate for obtaining FLV video, as long as getting working as FLV video before step S205
Preceding code rate.
In step S205, judge whether the code rate value of current code rate and target bit rate is identical；If current code rate and mesh
The code rate value of coding rate is not identical, thens follow the steps S206；If the code rate value of current code rate and target bit rate is identical, execute
Step S215.
In step S206, judge whether the code rate value of current code rate is lower than the code rate value of target bit rate；If working as former code
The code rate value of rate is lower than the code rate value of target bit rate, thens follow the steps S207；If the code rate value of current code rate is higher than object code
The code rate value of rate, thens follow the steps S208.
In step S207, judge whether the playing duration of the data to be played cached is greater than or equal to preset first
Cache duration；If the playing duration of the data to be played cached is greater than or equal to preset first caching duration, execute
Step S209 thens follow the steps S215 if being less than preset first caching duration when the broadcasting of the data to be played cached,
Wherein, the first caching duration is greater than the duration of a GOP.
In step S208, when judging whether the playing duration of the data to be played cached is less than the preset second caching
It is long；If the playing duration of the data to be played cached is less than preset second caching duration, S209 is thened follow the steps, if
The playing duration of the data to be played cached is greater than or equal to preset second caching duration, thens follow the steps S215, wherein
Second caching duration is greater than or equal to the duration of a GOP, less than the first caching duration.
Specifically, the playing duration of the data to be played cached, is the data volume according to the data to be played cached
Acquisition is calculated with current code rate.Setting caching duration is to guarantee to prevent Caton when carrying out code rate switching.
GOP is the basic unit of FLV video, and a GOP is a multi-medium data frame, by an I frame (Intra-
Coded picture, in-frame encoding picture frame), multiple P frame (Predictive-coded Picture, predictive-coded pictures
Frame) and multiple B frames (Bidirectionally-predicted picture, bidirectionally predictive coded picture frame) composition, I frame is
Key frame, P frame are forward predicted frame, and B frame is two-way interpolation frame.Key frame in one multi-medium data frame is usually one complete
Whole picture, and the P frame and B frame in a multi-medium data frame are mainly used for recording the variation relative to key frame, do not close
Key frame, which can not then decode, obtains P frame and B frame.
In practical applications, the duration of GOP is usually fixed in FLV video, is between the time between two I frames
Every, a usual GOP when it is 2~3 seconds a length of.
In a kind of specific embodiment, the duration of a GOP can be 3 seconds, and the first caching duration can be 4 seconds, the
Two caching durations can be 3 seconds.
In step S209, from configuration file, the ground for preserving the destination server of FLV video of target bit rate is obtained
Location.
In step S210, the corresponding object time stamp of next GOP after current GOP is obtained.
It in step S211, is stabbed according to the object time of acquisition, is issued to destination server and obtain object time stamp correspondence
GOP video data download request；Wherein, the code rate value and target of target bit rate be may include in video data downloading request
Timestamp.
In practical applications, probably due to some GOP may be lacked in the reasons destination server such as loss of data.It is logical
In normal situation, if there is the object time to stab corresponding GOP in destination server video data when, the object time can will stab correspondence
GOP video data be sent to issue downloading request client；If there is no object time stamp to correspond in destination server
GOP video data when, can by first timestamp be greater than the object time stamp GOP video data be sent to sending downloading
The client of request.Such as: object time stamp is 2, and not having timestamp in destination server is 2 GOP, the in destination server
It is 3 that one, which is stabbed 2 big timestamps than the object time, then, the video data transmitting for the GOP that timestamp can be 3 by destination server
Give the client for issuing downloading request.
In step S212, the video data that destination server is sent is received.
In step S213, the video data received is stored to caching.
In step S214, the corresponding code rate of video data is identified in the buffer；So that player is in playing caching
After the video data of previous code rate downloading, the decoded information of video data can be sent out according to video data corresponding code rate
Corresponding decoder is given to be decoded.The decoded video data of player plays.
In step S215, continue the FLV video for downloading current code rate.
Specifically, can be unit according to TAG (frame) by the video data received, store into buffer queue previous
After the video data of code rate downloading, the corresponding code rate of video data is identified in the caching, i.e. video data in mark caching
Index (index) changed, when code rate previous in the complete buffer queue of player plays downloading video data after,
It can know that the corresponding code rate of video data changes according to the mark in caching, thus, the handle before the decoding of new flow data
The information such as the metadata (metadata) newly flowed, that is, the height and width that newly flow inform decoder, to guarantee that decoder can be just
Seamless switching is realized in often work.
The technical scheme provided by this disclosed embodiment realizes the network according to user during FLV video playing
Environment self-adaption switches over code rate.Due to the technical scheme provided by this disclosed embodiment, may be implemented to broadcast in video
During putting, the clarity of video is played according to the adaptive switching of the current network environment of user, it is good in network environment
When play video high-definition, by the play clarity of video by the automatic of higher resolution when network environment difference
It is switched to the clarity for adapting to network environment at that time, to ensure that the continuity of user's viewing, effectively prevents going out for Caton
It is existing.
Fig. 3 is a kind of block diagram of the code rate switching device of FLV video shown according to an exemplary embodiment.Reference Fig. 3,
The device includes speed of download acquiring unit 301, determination unit 302, judging unit 303 and switch unit 304.
Speed of download acquiring unit 301 is configured as executing the current downloading speed for obtaining current network downloading FLV video
Degree；
Determination unit 302 is configured as executing and determines mesh from preset multiple code rates according to current speed of download
Coding rate；
Judging unit 303, be configured as executing according to the current code rate of the target bit rate and the FLV video whether phase
Together, judge whether to need to carry out code rate switching；
Switch unit 304 is configured as executing when needing to carry out code rate switching, is downloading the current of current code rate
After GOP, the downloading of the FLV video of current code rate is terminated, current code rate is switched to target bit rate.
In a specific embodiment, determination unit 302 specifically can be configured as execution:
Current speed of download will be less than and be determined as target bit rate with the smallest code rate of the difference of current speed of download.
In a specific embodiment, judging unit 303 are specifically configured to execute:
Judge whether the code rate value of the current code rate of the target bit rate and the FLV video is identical；
If the code rate value of the current code rate of the target bit rate and the FLV video is not identical, judgement has currently been delayed
Whether the data to be played deposited meet preset switching condition；If the data to be played currently cached meet described preset
Switching condition then needs to carry out code rate switching；
If the code rate value of the current code rate of the target bit rate and the FLV video is identical, do not need to carry out code rate
Switching.
In a specific embodiment, preset switching condition can be with are as follows:
When the code rate value of the current code rate is lower than the code rate value of the target bit rate, it is desirable that the number to be played cached
According to playing duration be greater than or equal to preset first caching duration, wherein the first caching duration be greater than GOP when
It is long；
When the code rate value of the current code rate is higher than the code rate value of the target bit rate, it is desirable that the number to be played cached
According to playing duration be less than preset second caching duration, wherein the second caching duration be greater than or equal to GOP when
It grows and is less than the first caching duration.
Fig. 4 is the block diagram of the code rate switching device of another kind FLV video shown according to an exemplary embodiment.Referring to figure
4, which can also include: configuration file acquiring unit 401.
The configuration file acquiring unit 401 is configured as executing the configuration text for the FLV video for obtaining current network downloading
Part；Include in configuration file: the corresponding code rate value of each code rate and code rate value and preserving code rate in preset multiple code rates
Corresponding relationship between the server address of FLV video.
In a specific embodiment, switch unit 304 specifically can be configured as execution:
From configuration file, the address for preserving the destination server of FLV video of target bit rate is obtained；
Obtain the corresponding object time stamp of next GOP after current GOP；
It is stabbed according to the object time of acquisition, the video counts of corresponding GOP is stabbed to the destination server sending acquisition object time
It is requested according to downloading；Code rate value comprising target bit rate and object time stamp in video data downloading request；
Receive the video data that destination server is sent, wherein the video data is that timestamp is target in target bit rate
The video data of the FLV video of the current network downloading of timestamp；
The video data received is stored to caching.
About the device in above-described embodiment, wherein each unit executes the concrete mode of operation in related this method
Embodiment in be described in detail, no detailed explanation will be given here.
The device that embodiment of the disclosure provides realizes the network environment according to user during FLV video playing
Adaptive switches over code rate.Due to the device that embodiment of the disclosure provides, the process in video playing may be implemented
In, the clarity of video is played according to the adaptive switching of the current network environment of user, is played when network environment is good
Video high-definition, it is when network environment difference that the play clarity of video is suitable by automatically switching to for higher resolution
Should when network environment clarity, thus ensure that user viewing continuity, effectively prevent the appearance of Caton.
Fig. 5 is the block diagram of a kind of electronic equipment shown according to an exemplary embodiment.Referring to Fig. 5, which can
To include:
Processor 501, communication interface 502, memory 503 and communication bus 504, wherein processor 501, communication interface
502, memory 503 completes mutual communication by communication bus 504,
Memory 503, for storing computer program；
Processor 501 when for executing the program stored on memory 503, realizes following steps:
Obtain the current speed of download of current network downloading FLV video；
Target bit rate is determined from preset multiple code rates according to current speed of download；
Whether the current code rate according to target bit rate and FLV video is identical, judges whether to need to carry out code rate switching；
If necessary to carry out code rate switching, then after having downloaded the current GOP of current code rate, the FLV of current code rate is terminated
Current code rate is switched to target bit rate by the downloading of video.
The electronic equipment that embodiment of the disclosure provides realizes the network according to user during FLV video playing
Environment self-adaption switches over code rate.Due to the electronic equipment that embodiment of the disclosure provides, may be implemented to broadcast in video
During putting, the clarity of video is played according to the adaptive switching of the current network environment of user, it is good in network environment
When play video high-definition, by the play clarity of video by the automatic of higher resolution when network environment difference
It is switched to the clarity for adapting to network environment at that time, to ensure that the continuity of user's viewing, effectively prevents going out for Caton
It is existing.
The communication bus that above-mentioned electronic equipment is mentioned can be Peripheral Component Interconnect standard (Peripheral Component
Interconnect, PCI) bus or expanding the industrial standard structure (Extended Industry Standard
Architecture, EISA) bus etc..The communication bus can be divided into address bus, data/address bus, control bus etc..For just
It is only indicated with a thick line in expression, figure, it is not intended that an only bus or a type of bus.
Communication interface is for the communication between above-mentioned electronic equipment and other equipment.
Memory may include random access memory (Random Access Memory, RAM), also may include non-easy
The property lost memory (Non-Volatile Memory, NVM), for example, at least a magnetic disk storage.Optionally, memory may be used also
To be storage device that at least one is located remotely from aforementioned processor.
Above-mentioned processor 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 (Digital Signal
Processing, DSP), it is specific integrated circuit (Application Specific Integrated Circuit, ASIC), existing
It is field programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic device, discrete
Door or transistor logic, discrete hardware components.
In the another embodiment that the disclosure provides, a kind of computer readable storage medium is additionally provided, which can
It reads to be stored with computer program in storage medium, the computer program realizes any of the above-described FLV video when being executed by processor
Code rate switching method the step of.
In the another embodiment that the disclosure provides, a kind of computer program product comprising instruction is additionally provided, when it
When running on computers, so that computer executes the code rate switching method of any FLV video in above-described embodiment.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to its of the disclosure
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the disclosure, these modifications, purposes or
Person's adaptive change follows the general principles of this disclosure and including the undocumented common knowledge in the art of the disclosure
Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the disclosure are by following
Claim is pointed out.
It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present disclosure is only limited by the accompanying claims.
Claims (10)
1. a kind of code rate switching method of FLV video, which is characterized in that be applied to client, the method, comprising:
Obtain the current speed of download of current network downloading FLV video；
Target bit rate is determined from preset multiple code rates according to the current speed of download；
Whether the current code rate according to the target bit rate and the FLV video is identical, judges whether to need to carry out code rate switching；
If necessary to carry out code rate switching, then after the current GOP for having downloaded the current code rate, the current code rate is terminated
The current code rate is switched to the target bit rate by the downloading of the FLV video.
2. according to right want 1 described in FLV video code rate switching method, which is characterized in that it is described according to the current downloading
Speed, from preset multiple code rates, the step of determining target bit rate, comprising:
The current speed of download will be less than and be determined as target bit rate with the smallest code rate of difference of the current speed of download.
3. the code rate switching method of FLV video according to claim 1, which is characterized in that described according to the object code
Whether the current code rate of rate and the FLV video is identical, judges whether to need the step of carrying out code rate switching, comprising:
Judge whether the code rate value of the current code rate of the target bit rate and the FLV video is identical；
If the code rate value of the current code rate of the target bit rate and the FLV video is not identical, what judgement had currently cached
Whether data to be played meet preset switching condition；If the data to be played currently cached meet the preset switching
Condition then needs to carry out code rate switching；
If the code rate value of the current code rate of the target bit rate and the FLV video is identical, do not need to carry out code rate switching.
4. the code rate switching method of FLV video according to claim 3, which is characterized in that the preset switching condition
Are as follows:
When the code rate value of the current code rate is lower than the code rate value of the target bit rate, it is desirable that the data to be played cached
Playing duration is greater than or equal to preset first caching duration, wherein the first caching duration is greater than the duration of a GOP；
When the code rate value of the current code rate is higher than the code rate value of the target bit rate, it is desirable that the data to be played cached
Playing duration be less than it is preset second caching duration, wherein it is described second caching duration more than or equal to a GOP duration and
Less than the first caching duration.
5. the code rate switching method of FLV video according to claim 1, which is characterized in that in the acquisition current network
Before the step of downloading the current speed of download of FLV video, further includes:
Obtain the configuration file of the FLV video of current network downloading；Include in the configuration file: preset multiple code rates
In between the corresponding code rate value of each code rate and the code rate value and the server address of FLV video for preserving the code rate
Corresponding relationship.
6. the code rate switching method of FLV video according to claim 5, which is characterized in that described by the current code rate
The step of being switched to the target bit rate, comprising:
From the configuration file, the address for preserving the destination server of FLV video of the target bit rate is obtained；
Obtain the corresponding object time stamp of next GOP after the current GOP；
It is stabbed according to the object time of acquisition, Xiang Suoshu destination server, which issues, obtains the corresponding GOP of the object time stamp
Video data download request, when including the code rate value and the target of the target bit rate in video data downloading request
Between stab；
Receive the video data that the destination server is sent, wherein when the video data is in the target bit rate
Between stamp be the object time stamp current network downloading FLV video video data；
The video data received is stored to caching.
7. a kind of code rate switching device of FLV video characterized by comprising
Speed of download acquiring unit is configured as executing the current speed of download for obtaining current network downloading FLV video；
Determination unit is configured as executing and determines object code from preset multiple code rates according to the current speed of download
Rate；
Judging unit is configured as executing, judgement whether identical according to the current code rate of the target bit rate and the FLV video
Whether need to carry out code rate switching；
Switch unit is configured as executing when needing to carry out code rate switching, in the current GOP for having downloaded the current code rate
Afterwards, the downloading for terminating the FLV video of the current code rate, is switched to the target bit rate for the current code rate.
8. the code rate switching device of FLV video according to claim 7, which is characterized in that the determination unit is configured
To execute:
The current speed of download will be less than and be determined as target bit rate with the smallest code rate of difference of the current speed of download.
9. a kind of electronic equipment characterized by comprising
Processor；
For storing the memory of the processor-executable instruction；
Wherein, the processor is configured to executing described instruction, to realize such as FLV described in any one of claims 1 to 6
The code rate switching method of video.
10. a kind of storage medium, when the instruction in the storage medium is executed by the processor of electronic equipment, so that the electricity
Sub- equipment is able to carry out the code rate switching method such as FLV video described in any one of claims 1 to 6.
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