CN108965928A - Self-adaptive link video downloading method and system - Google Patents
Self-adaptive link video downloading method and system Download PDFInfo
- Publication number
- CN108965928A CN108965928A CN201810927198.6A CN201810927198A CN108965928A CN 108965928 A CN108965928 A CN 108965928A CN 201810927198 A CN201810927198 A CN 201810927198A CN 108965928 A CN108965928 A CN 108965928A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000012634 fragment Substances 0.000 claims description 17
- 230000003044 adaptive effect Effects 0.000 claims description 11
- 238000009331 sowing Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 238000011897 real-time detection Methods 0.000 claims description 5
- 230000000977 initiatory effect Effects 0.000 claims description 4
- 230000008929 regeneration Effects 0.000 claims 1
- 238000011069 regeneration method Methods 0.000 claims 1
- 230000000630 rising effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Classifications
-
- 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
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
-
- 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
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
- H04N21/23805—Controlling the feeding rate to the network, e.g. by controlling the video pump
-
- 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
-
- 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
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
-
- 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
- H04N21/83—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
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Databases & Information Systems (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Information Transfer Between Computers (AREA)
Abstract
The invention discloses a method and a system for downloading a self-adaptive link video, which can monitor the downlink bandwidth really available in the current network in real time, calculate the video code rate required to be played in the latest section of the current video in real time, and fully utilize each state of each link, so that the link is in the state of downloading the video at any time in the network, the network bandwidth is fully utilized, the downloading speed of the video is accelerated, the starting speed after a progress bar is dragged is accelerated, and the pause probability in the playing process is reduced.
Description
Technical field
The present invention relates to video broadcasting field, especially a kind of adaptive link method for downloading video and system.
Background technique
Video broadcasting field at present starts one or more link by a video flowing address in video sowing time
CDN foradownloaded video data are gone, are also under one or more linking request when after video rises and broadcasts with dragging video progress
It carries, one section of fragment data (number of patent application: CN201310596480.8) is downloaded in each link.But this process does not judge very
Real network bandwidth, if being that can more create more link downloadings, if network if leading to the good scene of network bandwidth
The scene of difference then few as far as possible creation link downloading (because link needs to consume certain network bandwidth) in itself, does not judge to work as
Whether preceding network bandwidth supports that creating multiple links goes foradownloaded video data, creates multiple links and goes if network bandwidth is general
Foradownloaded video data will increase useless expense instead, cause speed of download slack-off.In addition it without judging the true code rate of video, leads
Different video is caused to download using same link number, but the video that code rate is very low, link number excessively increases network overhead instead,
Speed of download is reduced indirectly.The excessively high link number of code rate is excessively few then to reduce true Web vector graphic efficiency.
Major video stream is fragment data stream, and each fragment is required to by the connection end server (server-side), downloading
Data, downloading, which are completed to close, links these three stages, and three phases have certain time-consuming, when the prior art is to video download
Fine processing is not done, completes to close at the connection end server and downloading and links the two stages there is no video data downloading,
Its downlink bandwidth is not made full use of to play maximum efficiency.
Summary of the invention
The technical problem to be solved by the present invention is in view of the shortcomings of the prior art, under providing a kind of adaptive link video
Support method makes whenever have link to be in just in the state of foradownloaded video in network, accelerates rising for video and broadcast speed, accelerate
Rising after dragging progress bar broadcasts speed and reduces the Caton probability in playing process.
In order to solve the above technical problems, the technical scheme adopted by the invention is that: a kind of adaptive link video download side
Method, comprising the following steps:
1) before user broadcasts, before dragging progress bar, in broadcasting, the currently available true downlink of real-time detection user
Bandwidth, records each detection result, finally calculates the nearest downlink bandwidth average value of current network；User plays sowing time, dragging
When progress bar, in broadcasting, nearest one section video average bit rate for needing to play of current video is calculated in real time；
2) the link number of the foradownloaded video of this starting is calculated according to the downlink bandwidth average value, video average bit rate
Amount；
3) count number of links n, be respectively designated as H1, H2 ... Hn, video slicing number be respectively designated as piece1,
piece2,…,pieceM；M is video slicing number, n≤M；
4) H1 downloads piece1, connects the end server, when starting downloading data, initiates H2 and downloads piece2, connection
The end server starts downloading data；When H2 starting downloading piece2, initiates H3 and download piece3, the end server is connected, under starting
Carry data；The rest may be inferred, until initiating Hn when Hn-1 starting downloading piecen-1 and downloading piecen, connect the end server, starting
Downloading data；
5) when there is link that the fragment downloading of oneself distribution is completed, keeps idle, step 1)~step 3) is repeated again
Current link foradownloaded video quantity is calculated, whether choice needs to continue to keep n link downloading；If necessary to keep n chain
Downloading is connect, then is continued with current idle link Ha downloading piecen+1；If only needing to keep n-1 link downloading, close
Current idle link Ha is closed, available free link below is waited to be further continued for downloading piecen+1,1≤a≤n；If necessary to n+1 chain
It connects, then regenerates link Hn+1, download piecen+1, piecen+2 respectively using Ha and Hn+1；
6) step 6) is repeated, until all video slicing piece1~pieceM download completion.
In step 3), the calculation formula of number of links H are as follows: as 0≤D/M < 1.2, H=1；As 1.2≤D/M < 2, H=
2；As 2≤D/M < 3, H=3；As 3≤D/M < oo, H=4；Wherein, D is downlink bandwidth average value；M is video average code
Rate.According to the link number that bandwidth and the ratio calculation of code rate generate, guarantee that bandwidth appropriate creates appropriate number of link number, fills
Divide and network bandwidth is utilized.
It after step 6), is handled as follows: when each fragment, which is downloaded, to be completed, fragment being combined into continuous view in local
Frequency evidence is transferred to player or is cached to local.
Correspondingly, the present invention also provides a kind of adaptive link video download system based on dynamic network and dynamic code rate
System, comprising:
First computing unit, for before user rises and broadcasts, before dragging progress bar, in broadcasting, real-time detection user to work as
Preceding available true downlink bandwidth, records each detection result, and it is average finally to calculate the nearest downlink bandwidth of current network
Value；When user plays sowing time, dragging progress bar, in broadcasting, it is average that nearest one section video for needing to play of current video is calculated in real time
Code rate；
Second computing unit, for being calculated under this starting according to the downlink bandwidth average value, video average bit rate
Carry the number of links of video；
Statistic unit, for counting number of links n, be respectively designated as H1, H2 ... Hn, video slicing number are named respectively
For piece1, piece2 ..., pieceM；M is video slicing number, n≤M；
First download unit connects the end server, when starting downloading data, initiates H2 for starting H1 downloading piece1
Piece2 is downloaded, the end server is connected, starts downloading data；When H2 starting downloading piece2, initiates H3 and download piece3, connection
The end server starts downloading data；The rest may be inferred, until initiating Hn when Hn-1 starting downloading piecen-1 and downloading piecen, even
The end server is connect, downloading data is started；
Second download unit, for repeating first when there is link that the fragment downloading of oneself distribution is completed, keeps idle
Current link foradownloaded video quantity is recalculated in the operation of computing unit, the second computing unit and statistic unit, and whether choice
It needs to continue to keep n link downloading；If necessary to keep n link downloading, then continue with current idle link Ha downloading
piecen+1；If only needing to keep n-1 link downloading, current idle link Ha is closed, waits available free link below again
Continue to download piecen+1,1≤a≤n；It is linked if necessary to n+1, then regenerates link Hn+1, distinguished using Ha and Hn+1
Download piecen+1, piecen+2；
Third download unit, for repeating the operation of the second download unit, until all video slicing piece1~
PieceM downloads completion.
The calculating process of the number of links H are as follows: as 0≤D/M < 1.2, H=1；As 1.2≤D/M < 2, H=2；When 2
When≤D/M < 3, H=3；As 3≤D/M < oo, H=4；Wherein, D is downlink bandwidth average value；M is video average bit rate.
It further include output unit, for fragment to be combined into continuous videos number in local when each fragment downloads completion
According to being transferred to player or be cached to local.
Compared with prior art, the advantageous effect of present invention is that: the present invention by real-time monitoring current network it is true
Nearest one section video code rate for needing to play of current video can be calculated using downlink bandwidth and in real time in fact, and is made full use of each
Link each state (connection the end server, downloading data, downloading complete close link), so that in network whenever by
Link makes full use of network bandwidth, accelerates the speed of download of video in just in the state of foradownloaded video, to reach quickening view
Rising for frequency acts the purpose broadcast speed and reduce the Caton probability in playing process after broadcasting speed, quickening dragging progress bar.
Detailed description of the invention
Fig. 1 is the integrated stand composition of data downloading in video playing of the present invention；
Flow chart when Fig. 2 is present invention link foradownloaded video fragment.
Specific embodiment
As shown in Figure 1, the present invention relates to videos to broadcast, video dragging plays, the medium scene of video playing, scheduler passes through
Average available downlink bandwidth and nearest average bit rate recently are calculated in real time, the link number currently needed are calculated with this, often
A video slicing is individually downloaded in a link.
1. user rises broadcast before, before dragging progress bar, play in these three scenes, real-time detection user is presently available
True downlink bandwidth, record each detection result, finally calculate the nearest downlink bandwidth average value of current network；
2. user plays sowing time, dragging progress bar, these three scenes in broadcasting, the nearest one section of need of current video are calculated in real time
The video average bit rate to be played；
3. the downlink bandwidth average value calculated according to 1,2, video average bit rate calculate the several link downloadings of this starting
Video, specific formula is as follows:
It is average using downlink bandwidth D recently
Nearest average bit rate M
Link number H
Specific link downloading process is as shown in Figure 2.If generating 3 links, H1, H2, H3, video slicing are named respectively
Name number respectively piece1, piece2 ..., pieceN.
1) H1 first downloads piece1, connects server, starts downloading data；
2) it when H1 downloading data, initiates H2 and downloads piece2, connect server, start downloading data；
3) it when H2 downloading data, initiates H3 and downloads piece3, connect server, start downloading data；
4) if H1 first downloads the fragment of oneself distribution when completing, the step of in scheduler according to the above technical scheme
1,2,3 the link number that can currently need is recalculated, whether choice needs to continue to keep three link downloadings, if it is desired, then
Continue with idle link (H1) downloading piece4.If only needing to keep two links, H1 is closed, available free link below is waited
It is further continued for downloading piece4.If necessary to 4 link, then generate H4, using H1 and H4 press above-mentioned steps 1), 2) side, 3)
Formula downloads piece4, piece5 respectively, successively poll, until entire video download is completed.
Claims (6)
1. a kind of adaptive link method for downloading video, which comprises the following steps:
1) before user broadcasts, before dragging progress bar, in broadcasting, the currently available true downlink band of real-time detection user
Width, records each detection result, finally calculates the nearest downlink bandwidth average value of current network；User rise sowing time, drag into
When degree, in broadcasting, nearest one section video average bit rate for needing to play of current video is calculated in real time；
2) number of links of the foradownloaded video of this starting is calculated according to the downlink bandwidth average value, video average bit rate；
3) count number of links n, be respectively designated as H1, H2 ... Hn, video slicing number be respectively designated as piece1,
piece2,…,pieceM；M is video slicing number, n≤M；
4) H1 downloads piece1, connects the end server, when starting downloading data, initiates H2 and downloads piece2, connect the end server,
Start downloading data；When H2 starting downloading piece2, initiates H3 and download piece3, connect the end server, start downloading data；According to
This analogizes, until initiating Hn when Hn-1 starting downloading piecen-1 and downloading piecen, connect the end server, start downloading data；
5) it when there is link that the fragment downloading of oneself distribution is completed, keeps idle, repeats step 1)~step 3) and recalculates
Whether current link foradownloaded video quantity, choice need to continue to keep n link downloading；If necessary to keep under n link
It carries, then continues with current idle link Ha downloading piecen+1；If only needing to keep n-1 link downloading, closing is worked as
Preceding idle link Ha, waits available free link to be below further continued for downloading piecen+1,1≤a≤n；It is linked if necessary to n+1, then
Regeneration link Hn+1, downloads piecen+1, piecen+2 using Ha and Hn+1 respectively；
6) step 6) is repeated, until all video slicing piece1~pieceM download completion.
2. adaptive link method for downloading video according to claim 1, which is characterized in that in step 3), number of links H
Calculation formula are as follows: as 0≤D/M < 1.2, H=1；As 1.2≤D/M < 2, H=2；As 2≤D/M < 3, H=3；When 3≤
When D/M < oo, H=4；Wherein, D is downlink bandwidth average value；M is video average bit rate.
3. adaptive link method for downloading video according to claim 1, which is characterized in that after step 6), carry out such as
Lower processing: when each fragment, which is downloaded, to be completed, fragment is combined into continuous video data in local and is transferred to player or slow
It is stored to local.
4. a kind of adaptive link video downloading system based on dynamic network and dynamic code rate characterized by comprising
First computing unit, for before user rises and broadcasts, before dragging progress bar, in broadcasting, real-time detection user currently may be used
The true downlink bandwidth utilized, records each detection result, finally calculates the nearest downlink bandwidth average value of current network；With
When family sowing time, dragging progress bar, in broadcasting, nearest one section video average bit rate for needing to play of current video is calculated in real time；
Second computing unit, the downloading for calculating this starting according to the downlink bandwidth average value, video average bit rate regard
The number of links of frequency；
Statistic unit, for counting number of links n, be respectively designated as H1, H2 ... Hn, video slicing number are respectively designated as
piece1,piece2,…,pieceM；M is video slicing number, n≤M；
First download unit connects the end server, when starting downloading data, initiates H2 downloading for starting H1 downloading piece1
Piece2 connects the end server, starts downloading data；When H2 starting downloading piece2, initiates H3 and download piece3, connection
The end server starts downloading data；The rest may be inferred, until initiating Hn when Hn-1 starting downloading piecen-1 and downloading piecen, even
The end server is connect, downloading data is started；
Second download unit, for repeating first and calculating when there is link that the fragment downloading of oneself distribution is completed, keeps idle
The operation of unit, the second computing unit and statistic unit, recalculates current link foradownloaded video quantity, and whether choice needs
Continue to keep n link downloading；If necessary to keep n link downloading, then continue with current idle link Ha downloading
piecen+1；If only needing to keep n-1 link downloading, current idle link Ha is closed, waits available free link below again
Continue to download piecen+1,1≤a≤n；It is linked if necessary to n+1, then regenerates link Hn+1, distinguished using Ha and Hn+1
Download piecen+1, piecen+2；
Third download unit, for repeating the operation of the second download unit, until all video slicing piece1~pieceM are equal
Downloading is completed.
5. adaptive link video downloading system according to claim 4, which is characterized in that the meter of the number of links H
Calculation process are as follows: as 0≤D/M < 1.2, H=1；As 1.2≤D/M < 2, H=2；As 2≤D/M < 3, H=3；When 3≤D/M <
When oo, H=4；Wherein, D is downlink bandwidth average value；M is video average bit rate.
6. adaptive link video downloading system according to claim 4, which is characterized in that further include output unit, use
In when each fragment download complete when, fragment is combined into continuous video data in local and is transferred to player or is cached to this
Ground.
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| CN201810927198.6A CN108965928B (en) | 2018-08-15 | 2018-08-15 | Self-adaptive link video downloading method and system |
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| CN108965928B (en) | 2021-02-02 |
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