CN106790005B - Realize the system and method for low delay HLS live streaming - Google Patents
Realize the system and method for low delay HLS live streaming Download PDFInfo
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- CN106790005B CN106790005B CN201611143468.1A CN201611143468A CN106790005B CN 106790005 B CN106790005 B CN 106790005B CN 201611143468 A CN201611143468 A CN 201611143468A CN 106790005 B CN106790005 B CN 106790005B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/65—Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/75—Media network packet handling
- H04L65/762—Media network packet handling at the source
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
- H04L69/164—Adaptation or special uses of UDP protocol
Abstract
The invention discloses a kind of system and methods for realizing low delay HLS live streaming, are related to field of Internet multimedia.The system includes head end encoder, server and client side, and head end encoder is used to provide the original live source that dynamic updates；For head-end encoder acquisition original live source, dynamic real-time update index file and several media slicing files of dynamic generation, updated index file and since being broadcast live point, forward at least three media slicings file output is HLS unicast live source to server；Index file and media slicing file are sent in real time, and away from live streaming point, a nearest media slicing file is sent by the way of chunked coding；Client selects any position of one of media slicing file to start to play for parsing the index file received and media slicing file.The present invention can overcome the disadvantages that the high delay defect of traditional HLS live broadcast system, reduces time delay to greatest extent, makes HLS live streaming closer to live streaming point.
Description
Technical field
The present invention relates to field of Internet multimedia, and in particular to a kind of system and method for realizing low delay HLS live streaming.
Background technique
HLS (Http Live Streaming) agreement has many advantages such as simple, adaptive, is that global use is most wide
General the Internet transport protocol, HLS direct seeding technique are even more the every field for being widely used in mobile Internet Streaming Media.But it is opposite
In common live streaming media agreement, such as RTMP agreement, RTSP agreement, mobile agent server protocol etc., traditional HLS protocol live broadcast system
It is not real real time flow medium live broadcast system.In traditional HLS live broadcast system, server will be got from head end encoder
Media information cutting for several are short and the media slicing file of continuous ts format, constantly update corresponding m3u8 format
Then newest multiple media slicing files are continuously sent to client by index file and newest media slicing file
End, these media slicing files of client downloads simultaneously play media data.This technical characterstic of HLS, determines its delay
It generally can be more than a media slicing file duration, therefore, the delay of HLS live streaming can always be higher than common live streaming media and assist
View.
Summary of the invention
The purpose of the invention is to overcome the shortcomings of that traditional HLS protocol live broadcast system has high delay, a kind of reality is provided
The system and method for existing low delay HLS live streaming, the system and method can make up for it the high delay defect of traditional HLS live broadcast system,
Time delay is reduced to greatest extent, makes HLS live streaming closer to live streaming point.
The present invention provides a kind of system for realizing low delay HLS live streaming, which includes head end encoder, server and visitor
Family end,
The head end encoder is used for: providing the original live source that dynamic updates；
The server is used for: head-end encoder obtains original live source, according to original live source dynamic real-time update
Index file and several media slicing files of dynamic generation, by updated index file and since being broadcast live point it is forward at least
Three media slicing file outputs are HLS unicast live source；Updated index file and at least three media point are sent in real time
Piece file, away from live streaming point, a nearest media slicing file is sent by the way of block transmission coding；
The client is used for: being parsed the index file received and media slicing file, and is selected as needed wherein
Any position of one media slicing file starts to play.
Based on the above technical solution, the original live source is User Datagram Protocol UDP multicast live source；Institute
Stating server includes the first conversion network element, and the first conversion network element is used for:
Head-end encoder obtains UDP multicast live source, simultaneously according to UDP multicast live source dynamic real-time update index file
Several media slicing files of dynamic generation, by updated index file and forward at least three media minute since being broadcast live point
The output of piece file is HLS unicast live source；When client request plays live streaming, opened by updated index file and from live streaming point
The forward at least three media slicings file that begins is sent to client in real time, forward at least three media minute since being broadcast live point
In piece file, away from live streaming point, a nearest media slicing file is sent by the way of block transmission coding.
Based on the above technical solution, the original live source is HLS unicast live source；The server includes the
One storage network element, the first storage network element are used for:
Head-end encoder obtains HLS unicast live source, simultaneously according to HLS unicast live source dynamic real-time update index file
Several media slicing files of dynamic generation, by updated index file and forward at least three media minute since being broadcast live point
Local index file and local media slicing files are recorded and be stored as to piece file, by local index file and local media
Slicing files output is local HLS unicast live source, and total number >=described put from live streaming of the local media slicing files is opened
Begin the total number of forward at least three media slicings file；When client request plays live streaming, by local index file and this
Ground media slicing file is sent to client in real time, in local media slicing files, a nearest media slicing away from live streaming point
File is sent by the way of block transmission coding.
Based on the above technical solution, the original live source is UDP multicast live source；The server includes the
Two conversion network elements and the second storage network element, wherein
The second conversion network element is used for: head-end encoder obtains UDP multicast live source, according to UDP multicast live source
Dynamic real-time update index file and several media slicing files of dynamic generation are opened by updated index file and from live streaming point
Forward at least three media slicings file output of beginning is HLS unicast live source；Live streaming is recorded in the second storage network element request
When, forward at least three media slicings file is sent to the second storage net by updated index file and since being broadcast live point
Member, away from live streaming point, a nearest media slicing file is sent by the way of block transmission coding；
The second storage network element is used for: recording live streaming to the second conversion network element request, the second conversion network element is sent
Local index file and local media slicing files, the local are recorded and are stored as to index file and media slicing file
The total number of media slicing file >=forward at least three media slicings file since being broadcast live point total number；It incite somebody to action this
Ground index file and local media slicing files are sent to client in real time, nearest away from live streaming point in local media slicing files
A media slicing file using block transmission coding by the way of send.
Based on the above technical solution, a media slicing file nearest away from live streaming point is generating
One media slicing file, in addition to away from a nearest media slicing file of live streaming point, remaining media slicing of server transmission
File is the media slicing file generated；The server is also used to: the media slicing file generated is adopted
It is sent with the mode that non-block transmission encodes.
The present invention provides a kind of method for realizing low delay HLS live streaming applied to above system, comprising the following steps:
The head end encoder provides the original live source that dynamic updates；
The server head-end encoder obtains original live source, indexes text according to original live source dynamic real-time update
Part and several media slicing files of dynamic generation, by updated index file and forward at least three matchmaker since being broadcast live point
The output of body slicing files is HLS unicast live source；Updated index file and at least three media slicing files are sent in real time,
Away from live streaming point, a nearest media slicing file is sent by the way of block transmission coding；
The client parses the index file and media slicing file received, and selects one of matchmaker as needed
Any position of body slicing files starts to play.
Based on the above technical solution, the original live source is User Datagram Protocol UDP multicast live source；Institute
It states server and sends updated index file and forward at least three media slicing since being broadcast live point in real time to client
File, since being broadcast live point in forward at least three media slicings file, a nearest media slicing file away from live streaming point
It is sent by the way of block transmission coding.
Based on the above technical solution, the original live source is HLS unicast live source；The server head-end
Encoder obtains HLS unicast live source, according to HLS unicast live source dynamic real-time update index file and several matchmakers of dynamic generation
Body slicing files, forward at least three media slicings file is recorded by updated index file and since being broadcast live point
And it is stored as local index file and local media slicing files, it is by local index file and the output of local media slicing files
Local HLS unicast live source, the total number of the local media slicing files >=described forward at least three since being broadcast live point
The total number of a media slicing file；Send local index file and local media slicing files, local matchmaker in real time to client
In body slicing files, away from live streaming point, a nearest media slicing file is sent by the way of block transmission coding.
Based on the above technical solution, the original live source is UDP multicast live source；The server includes the
Two conversion network elements and the second storage network element, the second conversion network element head-end encoder obtain UDP multicast live source, according to
UDP multicast live source dynamic real-time update index file and several media slicing files of dynamic generation, by updated index text
Part and to start the output of forward at least three media slicings file since live streaming point be HLS unicast live source；The second storage net
When live streaming is recorded in member request, second converts network element for updated index file and forward at least three matchmaker since being broadcast live point
Body slicing files are sent to the second storage network element, away from a nearest media slicing file of live streaming point using block transmission coding
Mode is sent；
The second storage network element records live streaming to the second conversion network element request, the index text that the second conversion network element is sent
Local index file and local media slicing files, the local media point are recorded and are stored as to part and media slicing file
The total number of piece file >=forward at least three media slicings file since being broadcast live point total number；Give client reality
When send local index file and local media slicing files, in local media slicing files, a nearest matchmaker away from live streaming point
Body slicing files are sent by the way of block transmission coding.
Based on the above technical solution, a media slicing file nearest away from live streaming point is generating
One media slicing file, in addition to away from a nearest media slicing file of live streaming point, remaining media slicing of server transmission
File is the media slicing file generated；The media slicing file generated is using non-block transmission coding
Mode is sent.
Compared with prior art, advantages of the present invention is as follows:
(1) server in the present invention encodes a media slicing file nearest away from live streaming point using block transmission
The mode of (Chunked transfer encoding, chunked coding) is sent to client, away from one of live streaming point recently
Media slicing file is the media slicing file generated in server.The media slicing file generated is subjected to piecemeal
The mode of transmission coding is sent, rather than is just sent after waiting media slicing file all to generate, and can be added to greatest extent
The timeliness that newest media slicing file reaches client is broadcast live fastly, most multipotency reduces by the delay of 2~5s.
(2) present invention can take non-chunked to encode to away from the farther away media slicing file generated of live streaming point
Mode send, thus reduce coding and decoding the time.The present invention can make up for it the high delay defect of traditional HLS live broadcast system,
Time delay is reduced to greatest extent, makes HLS live streaming closer to live streaming point.
Detailed description of the invention
Fig. 1 is the topology diagram that low delay HLS live broadcast system is realized in the embodiment of the present invention 3；
Fig. 2 is the flow chart that low delay HLS live broadcasting method is realized in the embodiment of the present invention 3；
Fig. 3 is the schematic diagram that UDP multicast switchs to HLS unicast live streaming in the embodiment of the present invention 3；
Fig. 4 is the schematic diagram that server is recorded in the embodiment of the present invention 3 and storage HLS is broadcast live；
Fig. 5 is the schematic diagram of client terminal playing HLS unicast live streaming in the embodiment of the present invention 3.
Specific embodiment
With reference to the accompanying drawing and specific embodiment the present invention is described in further detail.In order to describe simplicity, this hair
In bright embodiment, the index file of m3u8 format is referred to as m3u8 file, based on the main m3u8 file abbreviation of m3u8 format
M3u8 file, the subindex file of m3u8 format are referred to as sub- m3u8 file；The media slicing file of ts format is referred to as
Ts fragment；Block transmission coding is referred to as chunked coding.So-called live streaming point refers to currently in the embodiment of the present invention
Time point corresponding to picture is broadcast live.
Embodiment 1:
The present embodiment provides it is a kind of realize low delay HLS live streaming system, the system include head end encoder, server and
Client, server include the first conversion network element；
Head end encoder is used for: providing the User Datagram Protocol UDP multicast live source that dynamic updates；
First conversion network element is used to UDP multicast live source being converted to HLS unicast live source, detailed process are as follows: head-end
Encoder obtains UDP multicast live source, according to UDP multicast live source dynamic real-time update m3u8 file and several ts of dynamic generation
Fragment, retain since live streaming point start forward at least three ts fragment, by updated m3u8 file and since live streaming to
Preceding at least three ts fragments output is output HLS unicast live source；Client is broadcast live to the first conversion network element request HLS unicast
When source, forward at least three ts fragment is sent to client in real time by m3u8 file and since being broadcast live point, wherein away from live streaming
A nearest ts fragment generated of point is sent by the way of chunked coding；Remaining generated at least two
A ts fragment can be sent using chunked coding or non-chunked coding mode；
Client is used for: being requested HLS unicast live source to the first conversion network element, is parsed m3u8 file and since being broadcast live point
Forward at least three ts fragment, and any position of one of ts fragment is selected to start to play as needed.
The present embodiment provides a kind of methods for realizing low delay HLS live streaming applied to above system, comprising the following steps:
Head end encoder provides the UDP multicast live source that dynamic updates, and the first conversion network element head-end encoder obtains UDP
Multicast live source retains according to UDP multicast live source dynamic real-time update m3u8 file and several ts fragments of dynamic generation from straight
The forward at least three ts fragment of beginning is broadcast, by updated m3u8 file and forward at least three ts since being broadcast live point
Fragment output is output HLS unicast live source；
Client requests HLS unicast live source to the first conversion network element, and the first conversion network element is by m3u8 file and from live streaming
Point starts forward at least three ts fragment and is sent to client in real time, wherein is generating away from one of live streaming point recently
Ts fragment is sent by the way of chunked coding；Remaining at least two ts fragment generated can use chunked
Coding or non-chunked coding mode are sent；
Since client parse m3u8 file and the forward at least three ts fragment point is broadcast live, and selects it as needed
In any position of a ts fragment start to play.
Embodiment 2:
The system for realizing low delay HLS live streaming the present embodiment provides second, which includes head end encoder, server
And client, server include the first storage network element；
Head end encoder is used for: providing the HLS unicast live source that dynamic updates；
First storage network element is used for: head-end encoder obtains HLS unicast live source, is generated according to HLS unicast live source
Dynamic update m3u8 file and several ts fragments of dynamic generation, by updated index file and since be broadcast live point it is forward
Local m3u8 file and local ts fragment are recorded and be stored as at least three media slicing files, by local m3u8 file and
Local ts fragment output is local HLS unicast live source；Client requests local HLS unicast live source to the first storage network element
When, local m3u8 file and local ts fragment are sent to client in real time, the local ts fragment number of transmission >=from point is broadcast live
Start forward at least three ts fragment number；In local ts fragment, a nearest ts fragment generated away from live streaming point
It is sent by the way of chunked coding；Remaining local ts fragment generated can use chunked coding or non-
Chunked coding mode is sent；
Client is used for: being requested local HLS unicast live source to the first storage network element, is parsed local m3u8 file and local
Ts fragment, and any position of one of ts fragment is selected to start to play as needed.
The present embodiment provides a kind of methods for realizing low delay HLS live streaming applied to above-mentioned second of system, including with
Lower step:
Head end encoder provides the HLS unicast live source that dynamic updates；
First storage network element head-end encoder obtains HLS unicast live source, generates dynamic more according to HLS unicast live source
New m3u8 file and several ts fragments of dynamic generation, by updated index file and forward at least three since being broadcast live point
Local m3u8 file and local ts fragment are recorded and be stored as to a media slicing file, by local m3u8 file and local ts
Fragment output is local HLS unicast live source；When client requests local HLS unicast live source to the first storage network element, it incite somebody to action this
Ground m3u8 file and local ts fragment are sent to client in real time, and the local ts fragment number of transmission >=since being put live streaming is forward
At least three ts fragment numbers；In local ts fragment, away from live streaming point, a nearest ts fragment generated is used
The mode of chunked coding is sent；Remaining local ts fragment generated can use chunked coding or non-
Chunked coding mode is sent；
Client parses local m3u8 file and local ts fragment, and selects any of one of ts fragment as needed
Position starts to play.
Embodiment 3:
Shown in Figure 1, the present embodiment provides the systems that the third realizes low delay HLS live streaming, which includes head end
Encoder, server and client side, server include the second conversion network element and the second storage network element, the second conversion network element and second
Storage network element is provided with chunked encoding function, and client has chunked decoding function；
Second conversion network element is used for: head-end encoder obtains UDP multicast live source, real-time according to UDP multicast live source
Dynamic updates m3u8 file and several ts fragments of dynamic generation, by updated m3u8 file and since being broadcast live point it is forward to
Few three ts fragments output is HLS unicast live source；When live streaming is recorded in second storage network element request, by updated m3u8 file
With since live streaming point start forward at least three ts fragment be sent to the second storage network element, away from live streaming point recently one giving birth to
At ts fragment using chunked coding by the way of send；Remaining ts fragment generated can be encoded using chunked
Or non-chunked coding mode is sent；
Second storage network element is used for: recording live streaming to the second conversion network element request, the m3u8 that the second conversion network element is sent
Local m3u8 file and local ts fragment are recorded and are stored as to file and ts fragment, and the total number of local ts fragment >=from straight
Broadcast the total number for starting forward at least three ts fragment；Local m3u8 file and local ts fragment are sent to client in real time
It holds, in local ts fragment, is sent by the way of chunked coding away from a nearest ts fragment generated of live streaming point；
Remaining local ts fragment generated can be sent using chunked coding or non-chunked coding mode；
Client is used for: being requested local HLS unicast live source to the first storage network element, is parsed local m3u8 file and local
Ts fragment, and any position of one of ts fragment is selected to start to play as needed.
Second conversion network element, the second storage network element and client include a main m3u8 file and several ts fragments；It is main
Include when m3u8 file includes multiple code rates, in each main m3u8 file the m3u8 file equal with code rate number unification it is fixed
Bit identifier url includes the url of multiple ts fragments in every sub- m3u8 file.
It is shown in Figure 2, realize what low delay HLS was broadcast live applied to the third above-mentioned system the present embodiment provides a kind of
Method, comprising the following steps:
S1, head end encoder provide the UDP multicast live source that dynamic updates；By taking two kinds of code rates as an example, head end encoder is mentioned
The multicast address of the UDP multicast live source of confession is respectively as follows: udp: // 224.11.11.10:12306 and udp: //
224.11.11.11:12306；The former is the first code rate multicast address, and the latter is the second code rate multicast address；
S2, server include the second conversion network element and the second storage network element, and the second conversion network element head-end encoder obtains
UDP multicast live source will more according to UDP multicast live source dynamic real-time update m3u8 file and several ts fragments of dynamic generation
M3u8 file after new and to start forward at least three ts fragment output since live streaming point be HLS unicast live source, to realize
Conversion of the UDP multicast live source to HLS unicast live source；Updated m3u8 file includes main m3u8 file and two sub- m3u8
File；
The detailed process that UDP multicast live source is transformed into HLS unicast live source is shown in Figure 3, and server 10:00 is added
Two UDP multicast live streamings and receiving multicast data, generate a main m3u8 file main.m3u8 and corresponding sub- m3u8 file
1.m3u8 and 2.m3u8；Then multicast packet is sliced as unit of 10s, the second conversion network element memory only retains comprising working as
Newest three ts fragments 1_1.ts, 1_2.ts, 1_3.ts and 2_1.ts, 2_2.ts, 2_3.ts of preceding ts fragment, wherein 1_3.ts
It is the ts fragment being currently generating with 2_3.ts, that is, the ts fragment that distance live streaming point is nearest；Sub- m3u8 file
Include the url of tri- ts fragments of 1_1.ts, 1_2.ts, 1_3.ts in 1.m3u8, in sub- m3u8 file 2.m3u8 comprising 2_1.ts,
The url of tri- ts fragments of 2_2.ts, 2_3.ts.
Server second converts network element for the main m3u8 file url that the live streaming of UDP multicast is converted to after HLS unicast live streaming
Http: // 172.16.0.129:9001/main.m3u8, corresponding two sub- m3u8 file url are respectively as follows: http: //
172.16.0.191:9001/1.m3u8；And http: // 172.16.0.191:9002/2.m3u8, specific example are as follows:
Main m3u8 file example is as follows:
GET/main.m3u8HTTP/1.1
Range:bytes=0-
User-Agent:CDN/1.0
Via:172.16.0.161
Host:172.16.0.129:9001
Connection:close
HTTP/1.1 200OK
Content-Type:application/vnd.apple.mpegurl
Content-Length:174
#EXTM3U
#EXT-X-STREAM-INF:PROGRAM-ID=1, BANDWIDTH=706428
http://172.16.0.129:9001/1.m3u8
#EXT-X-STREAM-INF:PROGRAM-ID=1, BANDWIDTH=2166662
http://172.16.0.129:9001/2.m3u8
The example of the sub- m3u8 file of entitled 1.m3u8 is as follows:
GET/1.m3u8HTTP/1.1
Range:bytes=0-
User-Agent:CDN/1.0
Via:172.16.0.161
Host:172.16.0.129:9001
Connection:Keep-Alive
HTTP/1.1 200OK
Content-Type:application/vnd.apple.mpegurl
Content-Length:381
#EXTM3U
#EXT-X-TARGETDURATION:10
#EXT-X-VERSION:3
#EXT-X-MEDIA-SEQUENCE:5507313
#EXT-X-PROGRAM-DATE-TIME:2016-09-29T02:06:15Z
#EXTINF:10,
http://172.16.0.130:9001/1_5507313.ts
#EXT-X-PROGRAM-DATE-TIME:2016-09-29T02:06:25Z
#EXTINF:10,
http://172.16.0.129:9001/1_5507314.ts
#EXT-X-PROGRAM-DATE-TIME:2016-09-29T02:06:35Z
#EXTINF:10,
http://172.16.0.130:9001/1_5507315.ts
The example of the sub- m3u8 file of entitled 2.m3u8 is as follows:
GET/2.m3u8HTTP/1.1
Range:bytes=0-
User-Agent:CDN/1.0
Via:172.16.0.161
Host:172.16.0.129:9001
Connection:Keep-Alive
HTTP/1.1 200OK
Content-Type:application/vnd.apple.mpegurl
Content-Length:381
#EXTM3U
#EXT-X-TARGETDURATION:10
#EXT-X-VERSION:3
#EXT-X-MEDIA-SEQUENCE:5507315
#EXT-X-PROGRAM-DATE-TIME:2016-09-29T02:06:25Z
#EXTINF:10,
http://172.16.0.130:9001/2_5507315.ts
#EXT-X-PROGRAM-DATE-TIME:2016-09-29T02:06:35Z
#EXTINF:10,
http://172.16.0.129:9001/2_5507316.ts
#EXT-X-PROGRAM-DATE-TIME:2016-09-29T02:06:45Z
#EXTINF:10,
http://172.16.0.130:9001/2_5507317.ts
When live streaming is recorded in second storage network element request, the second conversion network element is opened by updated m3u8 file and from live streaming point
The forward at least three ts fragment that begins is sent to the second storage network element, and away from live streaming point, a nearest ts fragment uses chunked
The mode of coding is sent；
This is recorded and are stored as to the m3u8 file and ts fragment that second conversion network element is sent by S3, the second storage network element
Ground m3u8 file and local ts fragment, the forward at least three ts fragment of the total number of local ts fragment >=since being put live streaming
Total number；
Shown in Figure 4, server second stores the mistake that network element receives and stores m3u8 file and ts fragment after conversion
Journey are as follows: the second storage network element generates itself corresponding m3u8 file after receiving the data of the second conversion network element and is stored in local,
Data are decoded according to the coding mode of the second conversion network element and are stored as local m3u8 file and local ts fragment；It is local
M3u8 file includes main m3u8 file and two sub- m3u8 files；
Server second stores the main m3u8 file that network element stores and sub- m3u8 file example is as follows:
Main m3u8 file example is as follows:
GET/fonsview_hls/hls_001? FvSeid=54e014f36b515f46&Fsv_filetype=0&
Fsv_ctype=LIVES&Fsv_cid=1003
&Fsv_chan_hls_se_idx=0&Fsv_TBt=2874144&Fsv_ShiftEnable=1 &Fsv_
ShiftTsp=1&Fsv_SV_PARAM1=0&Fsv_otype=0
&Provider_id=fonsview_hls&Pcontent_id=hls_001HTTP/1.1
Host:172.16.0.161:8114
User-Agent:VLC/2.2.4LibVLC/2.2.4
Range:bytes=0-
Connection:close
Icy-MetaData:1
HTTP/1.1 200OK
Server:FonsView SS/1.0
Date:Thu,29Sep 2016 02:07:53GMT
Content-Type:application/vnd.apple.mpegurl
Cache-Control:no-cache
Pragma:no-cache
Accept-Ranges:bytes
Content-Length:628
Content-Range:bytes 0-627/628
Connection:close
#EXTM3U
#EXT-X-STREAM-INF:PROGRAM-ID=1003, BANDWIDTH=2167715
Http: // 172.16.0.161:8114/fonsview_hls/hls_001? FvSeid=
54e014f36b515f46&Fsv_filetype=1&Fsv_ctype=LIVES
&Fsv_cid=1003&Fsv_chan_hls_se_idx=0&Fsv_rate_id=0&Fsv_SV _ PARAM1=
0&Fsv_ShiftEnable=1&Fsv_ShiftTsp=1&
Provider_id=fonsview_hls&Pcontent_id=hls_001&Fsv_otype=0
#EXT-X-STREAM-INF:PROGRAM-ID=1003, BANDWIDTH=706428
Http: // 172.16.0.161:8114/fonsview_hls/hls_001? FvSeid=
54e014f36b515f46&Fsv_filetype=1&Fsv_ctype=LIVES
&Fsv_cid=1003&Fsv_chan_hls_se_idx=0&Fsv_rate_id=1&Fsv_SV _ PARAM1=
0&Fsv_ShiftEnable=1&Fsv_ShiftTsp=1
&Provider_id=fonsview_hls&Pcontent_id=hls_001&Fsv_otype=0
Wherein the corresponding sub- m3u8 file example comprising last three ts fragments url of the first code rate is as follows:
GET/fonsview_hls/hls_001? FvSeid=54e014f36b515f46&Fsv_filetype=1&
Fsv_ctype=LIVES&Fsv_cid=1003
&Fsv_chan_hls_se_idx=0&Fsv_rate_id=0&Fsv_SV_PARAM1=0&Fsv _
ShiftEnable=1&Fsv_ShiftTsp=1
&Provider_id=fonsview_hls&Pcontent_id=hls_001&Fsv_otype=0HTTP/1.1
Host:172.16.0.161:8114
User-Agent:VLC/2.2.4LibVLC/2.2.4
Range:bytes=0-
Connection:close
Icy-MetaData:1
HTTP/1.1 200 OK
Server:FonsView SS/1.0
Date:Thu,29 Sep 2016 02:07:53 GMT
Content-Type:application/vnd.apple.mpegurl
Cache-Control:no-cache
Pragma:no-cache
Accept-Ranges:bytes
Content-Length:2976
Content-Range:bytes 0-2975/2976
Connection:close
#EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:10
#EXT-X-MEDIA-SEQUENCE:5507304
#EXT-X-PROGRAM-DATE-TIME:2016-09-29T02:06:15Z
#EXTINF:10,883036
Http: // 172.16.0.161:8114/LIVES/1475114775_0010000028_0000000005 .ts?
FvSeid=54e014f36b515f46
&Fsv_filetype=2&Provider_id=fonsview_hls&Pcontent_id=hls _ 001&Fsv_
Sd=10&Fsv_otype=0
#EXT-X-PROGRAM-DATE-TIME:2016-09-29T02:06:25Z
#EXTINF:10,883036
Http: // 172.16.0.161:8114/LIVES/1475114785_0010000028_0000000006 .ts?
FvSeid=54e014f36b515f46
&Fsv_filetype=2&Provider_id=fonsview_hls&Pcontent_id=hls _ 001&Fsv_
Sd=10&Fsv_otype=0
#EXT-X-PROGRAM-DATE-TIME:2016-09-29T02:06:35Z
#EXTINF:10,881720
Http: // 172.16.0.161:8114/LIVES/1475114795_0010000028_0000000007 .ts?
FvSeid=54e014f36b515f46
&Fsv_filetype=2&Provider_id=fonsview_hls&Pcontent_id=hls _ 001&Fsv_
Sd=10&Fsv_otype=0
Second storage network element sends local m3u8 file and local ts fragment to client in real time, in local ts fragment, away from
A nearest ts fragment of live streaming point is sent by the way of chunked coding；
S4, client parsing local m3u8 file and local ts fragment, and one of ts fragment is selected as needed
Any position starts to play, and detailed process is as follows:
As shown in figure 5, user end to server hair live streaming request, newest several ts that the second storage network element will be recorded currently
Fragment is sent to client, and the number of newest several ts fragments can be 12 herein；
Second storage network element selects different coding modes to send media information to visitor according to the recording situation of current slice
Family end: chunked volume is carried out for the ts fragment 1475114785_0000000028_0000000007.ts data recorded
Code simultaneously sends data to client, other ts fragments can be sent using chunked coding or non-chunked coding mode；
Client parses local m3u8 file and local ts fragment, and any position of one of ts fragment is selected according to Network status
Start to play.
Those skilled in the art can carry out various modifications to the embodiment of the present invention and modification, if these modifications and change
For type within the scope of the claims in the present invention and its equivalent technologies, then these modifications and variations are also in protection scope of the present invention
Within.
The prior art that the content being not described in detail in specification is known to the skilled person.
Claims (8)
1. a kind of system for realizing low delay HLS live streaming, which includes head end encoder, server and client side, feature
It is:
The head end encoder is used for: providing the original live source that dynamic updates；
The server is used for: head-end encoder obtains original live source, is indexed according to original live source dynamic real-time update
File and several media slicing files of dynamic generation, by updated index file and forward at least three since being broadcast live point
The output of media slicing file is HLS unicast live source；Updated index file and at least three media slicings text are sent in real time
Part, away from live streaming point, a nearest media slicing file is sent by the way of block transmission coding；
The client is used for: being parsed the index file received and media slicing file, and is selected one of them as needed
Any position of media slicing file starts to play；
A media slicing file nearest away from live streaming point is the media slicing file generated, except away from live streaming point
Outside a nearest media slicing file, remaining media slicing file that server is sent is the media slicing text generated
Part；The server is also used to: the media slicing file generated is sent by the way of non-block transmission coding.
2. realizing the system of low delay HLS live streaming as described in claim 1, it is characterised in that: the original live source is to use
User data datagram protocol UDP multicast live source；The server includes the first conversion network element, and the first conversion network element is used for:
Head-end encoder obtains UDP multicast live source, according to UDP multicast live source dynamic real-time update index file and dynamic
Several media slicing files are generated, by updated index file and the forward at least three media slicings text since being broadcast live point
Part output is HLS unicast live source；Client request play live streaming when, by updated index file and since be broadcast live point to
At least three preceding media slicing files are sent to client in real time, the forward at least three media slicings text since being broadcast live point
In part, away from live streaming point, a nearest media slicing file is sent by the way of block transmission coding.
3. realizing the system of low delay HLS live streaming as described in claim 1, it is characterised in that: the original live source is HLS
Unicast live source；The server includes the first storage network element, and the first storage network element is used for:
Head-end encoder obtains HLS unicast live source, according to HLS unicast live source dynamic real-time update index file and dynamic
Several media slicing files are generated, by updated index file and the forward at least three media slicings text since being broadcast live point
Local index file and local media slicing files are recorded and be stored as to part, by local index file and local media fragment
File output is local HLS unicast live source, the total number of the local media slicing files >=described since being put live streaming to
The total number of at least three preceding media slicing files；When client request plays live streaming, by local index file and local matchmaker
Body slicing files are sent to client in real time, in local media slicing files, a nearest media slicing file away from live streaming point
It is sent by the way of block transmission coding.
4. realizing the system of low delay HLS live streaming as described in claim 1, it is characterised in that: the original live source is UDP
Multicast live source；The server includes the second conversion network element and the second storage network element, wherein
The second conversion network element is used for: head-end encoder obtains UDP multicast live source, real-time according to UDP multicast live source
Dynamic updates index file and several media slicing files of dynamic generation, by updated index file and since being broadcast live point to
Preceding at least three media slicing files output is HLS unicast live source；It, will when live streaming is recorded in the second storage network element request
Updated index file and since be broadcast live point forward at least three media slicings file be sent to the second storage network element, away from
A nearest media slicing file of live streaming point is sent by the way of block transmission coding；
The second storage network element is used for: recording live streaming to the second conversion network element request, the index that the second conversion network element is sent
Local index file and local media slicing files, the local media are recorded and are stored as to file and media slicing file
The total number of slicing files >=forward at least three media slicings file since being broadcast live point total number；By local rope
Quotation part and local media slicing files are sent to client in real time, in local media slicing files, away from live streaming point it is nearest one
A media slicing file is sent by the way of block transmission coding.
5. a kind of method for realizing low delay HLS live streaming applied to system as described in claim 1, which is characterized in that including
Following steps:
The head end encoder provides the original live source that dynamic updates；
The server head-end encoder obtains original live source, simultaneously according to original live source dynamic real-time update index file
Several media slicing files of dynamic generation, by updated index file and forward at least three media minute since being broadcast live point
The output of piece file is HLS unicast live source；Updated index file and at least three media slicing files are sent in real time, away from straight
An a little nearest media slicing file is broadcast to send by the way of block transmission coding；
The client parses the index file and media slicing file received, and selects one of media point as needed
Any position of piece file starts to play；
A media slicing file nearest away from live streaming point is the media slicing file generated, except away from live streaming point
Outside a nearest media slicing file, remaining media slicing file that server is sent is the media slicing text generated
Part；The media slicing file generated is sent by the way of non-block transmission coding.
6. realizing the method for low delay HLS live streaming as claimed in claim 5, it is characterised in that: the original live source is to use
User data datagram protocol UDP multicast live source；The server sends updated index file to client and in real time from live streaming
Point starts forward at least three media slicings file, since being broadcast live point in forward at least three media slicings file, away from
A nearest media slicing file of live streaming point is sent by the way of block transmission coding.
7. realizing the method for low delay HLS live streaming as claimed in claim 5, it is characterised in that: the original live source is HLS
Unicast live source；The server head-end encoder obtains HLS unicast live source, according to the real-time dynamic of HLS unicast live source
Update index file and several media slicing files of dynamic generation, by updated index file and since being broadcast live point it is forward
Local index file and local media slicing files are recorded and be stored as at least three media slicing files, by local index
File and the output of local media slicing files are local HLS unicast live source, the total numbers of the local media slicing files >=
The total number of the forward at least three media slicings file since being broadcast live point；Send local index text in real time to client
Part and local media slicing files, in local media slicing files, away from a nearest media slicing file of live streaming point using minute
The mode of block transmission coding is sent.
8. realizing the method for low delay HLS live streaming as claimed in claim 5, it is characterised in that: the original live source is UDP
Multicast live source；The server includes the second conversion network element and the second storage network element, and the second conversion network element head-end is compiled
Code device obtains UDP multicast live source, according to UDP multicast live source dynamic real-time update index file and several media of dynamic generation
Slicing files, forward at least three media slicings file exports as HLS by updated index file and since being broadcast live point
Unicast live source；It is described second storage network element request record live streaming when, second conversion network element by updated index file and from
Live streaming point starts forward at least three media slicings file and is sent to the second storage network element, a nearest media away from live streaming point
Slicing files are sent by the way of block transmission coding；
It is described second storage network element to second conversion network element request record live streaming, by second conversion network element send index file and
Local index file and local media slicing files, the local media fragment text are recorded and be stored as to media slicing file
The total number of part >=forward at least three media slicings file since being broadcast live point total number；It is sent out in real time to client
Send local index file and local media slicing files, in local media slicing files, a nearest media minute away from live streaming point
Piece file is sent by the way of block transmission coding.
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| CN107135400A (en) * | 2017-06-12 | 2017-09-05 | 上海高顿教育培训有限公司 | A kind of method for reducing network direct broadcasting delay |
| CN109151614B (en) * | 2017-06-19 | 2023-05-16 | 中兴通讯股份有限公司 | Method and device for reducing HLS live broadcast delay |
| CN108540868B (en) * | 2018-05-16 | 2019-04-16 | 北京百度网讯科技有限公司 | Processing method, device, server, terminal and the storage medium of HLS live streaming |
| EP3997888A1 (en) | 2019-07-12 | 2022-05-18 | Carrier Corporation | A system and a method for streaming videos by creating object urls at client |
| CN110324727A (en) * | 2019-07-16 | 2019-10-11 | 浙江大华技术股份有限公司 | Computer readable storage medium, server and its method for responding playing request |
| CN111131862A (en) * | 2020-01-02 | 2020-05-08 | 山东云缦智能科技有限公司 | Method for realizing automatic main-standby switching of CMAF live broadcast source |
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| CN102232298A (en) * | 2011-04-07 | 2011-11-02 | 华为技术有限公司 | Method, device and system for transmitting and processing media content |
| CN102801690A (en) * | 2011-05-25 | 2012-11-28 | 华为技术有限公司 | Stream media processing method, distribution server, client and system |
| CN103686202A (en) * | 2012-09-18 | 2014-03-26 | 中兴通讯股份有限公司 | Real-time transcoding transmitting method and system based on HTTP (Hyper Text Transport Protocol) under DLNA (Digital Living Network Alliance) |
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| CN102232298A (en) * | 2011-04-07 | 2011-11-02 | 华为技术有限公司 | Method, device and system for transmitting and processing media content |
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