CN109040769A - Direct broadcast time-shift method and device based on HLS protocol - Google Patents
Direct broadcast time-shift method and device based on HLS protocol Download PDFInfo
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- CN109040769A CN109040769A CN201810965928.1A CN201810965928A CN109040769A CN 109040769 A CN109040769 A CN 109040769A CN 201810965928 A CN201810965928 A CN 201810965928A CN 109040769 A CN109040769 A CN 109040769A
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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
- H04N21/21—Server components or server architectures
- H04N21/218—Source of audio or video content, e.g. local disk arrays
- H04N21/2187—Live feed
-
- 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
- H04N21/239—Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests
- H04N21/2393—Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests involving handling client requests
-
- 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
- H04N21/432—Content retrieval operation from a local storage medium, e.g. hard-disk
- H04N21/4325—Content retrieval operation from a local storage medium, e.g. hard-disk by playing back content from the storage medium
-
- 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
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/458—Scheduling content for creating a personalised stream, e.g. by combining a locally stored advertisement with an incoming stream; Updating operations, e.g. for OS modules ; time-related management operations
- H04N21/4586—Content update operation triggered locally, e.g. by comparing the version of software modules in a DVB carousel to the version stored locally
-
- 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
-
- 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
- H04N21/85406—Content authoring involving a specific file format, e.g. MP4 format
Abstract
The direct broadcast time-shift method and device based on HLS protocol that the invention discloses a kind of, first receive the time shifting broadcasting request that client is initiated, further according to the channel identication and initial time in request, the file name of the starting TS slicing files to be retrieved of determination, file name is then based on to search and record corresponding TS slicing files, to generate the played file of corresponding M3U8 format, played file is finally sent to client.Need to set concordance list compared with the prior art in advance, directly the time is written in the TS file name in M3U8 file for technical solution of the present invention, does not depend on independent index file, to reduce the time-consuming for searching index file, improves time shift efficiency.
Description
Technical field
The present invention relates to field of computer technology more particularly to a kind of direct broadcast time-shift method and devices based on HLS protocol.
Background technique
HTTP Live Streaming (abbreviation is HLS) is the Streaming Media based on HTTP proposed by Apple Inc.
The network transmission protocol.Its working principle be entire stream is divided into it is small one by one downloaded based on the file of HTTP, every time only
It downloads.When Media Stream is playing, client be can choose from many different Back Up Sources under different rates
Same resource is carried, flow media session is allowed to adapt to different data rates.When starting a flow media session, client meeting
One extended M3U (m3u8) playlist file comprising metadata of downloading, for finding available Media Stream.
And if user wants to realize that time shifting broadcasting (after time shaft moves forward sometime, is broadcast into virtual live streaming
Put), then it is traditional that the index file being pre-created can be searched based on HLS time shifting broadcasting, specific TS fragment is navigated to, is regenerated
The M3U8 file of Cheng Xin is downloaded for user and is played.Record has sometime corresponding TS slicing files name in index file.When
After a TS fragment in M3U8 file plays, sequence number parameter is added one automatically by server, to be switched to next TS fragment.
This playback method depends on independent index file, need to record more parts of videos before time shifting broadcasting to create corresponding index text
Part occupies the space of server, and retrieval time is longer, influences user experience.
Summary of the invention
The embodiment of the present invention proposes a kind of direct broadcast time-shift method and device based on HLS protocol, will directly be written the time
In TS file name in M3U8 file, independent index file is not depended on, to reduce the time-consuming for searching index file, is improved
Time shift efficiency.
The embodiment of the present invention provides a kind of direct broadcast time-shift method based on HLS protocol, comprising:
Receive the request of the first time shifting broadcasting；Wherein, first time shifting broadcasting request includes: the first channel identifier, the
The first initial time that one time shift broadcast identifier and request play；Wherein, time shifting broadcasting identifier is current for unique identification
The corresponding client of playing request；
According to first channel identifier and first initial time, the starting TS slicing files to be retrieved of determination
File name；
Corresponding TS slicing files are searched and record, based on the file name to generate the broadcasting of corresponding M3U8 format
File；
Send the played file of the M3U8 format.
Further, described to search and record corresponding TS slicing files based on the file name, it is corresponding to generate
The played file of M3U8 format, specifically:
Search and record corresponding three TS slicing files based on the file name, and three TS slicing files
File name is ranked up, and generates the played file of corresponding M3U8 format；
Wherein, first TS slicing files of the played file are the starting TS slicing files.
Further, the direct broadcast time-shift method based on HLS protocol further include:
Receive the request of the second time shifting broadcasting；
Second moves broadcast identifier and requests the play second starting when parsing the second time shifting broadcasting request to obtain
Moment；
Judge that the second time shifting broadcasting identifier whether there is；
If it exists, then corresponding initial time of time shifting broadcasting identifier that will be recorded in memory, when as described second
Move the initial time of playing request；
If it does not exist, then the second initial time played the request that the parsing obtains, broadcasts as second time shift
Put the initial time of request.
Further, if the second time shifting broadcasting identifier exists, further comprise:
Update the TS slicing files in the played file of the corresponding M3U8 format of the second time shifting broadcasting identifier.
Correspondingly, the present invention provides a kind of direct broadcast time-shift device based on HLS protocol, comprising: the first receiving module, really
Cover half block, generation module and sending module；
Wherein, first receiving module is for receiving the request of the first time shifting broadcasting；Wherein, first time shifting broadcasting is asked
Ask includes: the first channel identifier, the first time shifting broadcasting identifier and the first initial time for requesting broadcasting；Wherein, time shift is broadcast
Identifier is put for the corresponding client of the currently playing request of unique identification；
The determining module is used for according to first channel identifier and first initial time, what determination to be retrieved
Originate the file name of TS slicing files；
The generation module is used to be searched based on the file name and be recorded corresponding TS slicing files, to generate correspondence
M3U8 format played file；
The sending module is used to send the played file of the M3U8 format.
Further, the generation module is specifically used for: being searched based on the file name and records corresponding three TS
Slicing files, and the file name of three TS slicing files is ranked up, and generates the played file of corresponding M3U8 format；
Wherein, first TS slicing files of the played file are the starting TS slicing files.
Further, the direct broadcast time-shift device based on HLS protocol further include: the second receiving module, is sentenced parsing module
Disconnected module and adjustment module；
Wherein, second receiving module is for receiving the request of the second time shifting broadcasting；
Second moves broadcast identifier and asks when the parsing module is for parsing the second time shifting broadcasting request to obtain
Seek the second initial time of broadcasting；
The judgment module is for judging that the second time shifting broadcasting identifier whether there is；
The adjustment module is used in the presence of the judgment module determines that the second time shifting broadcasting identifier is, will be interior
The corresponding initial time of time shifting broadcasting identifier for depositing middle record, the initial time as second time shifting broadcasting request；
And for being asked what the parsing obtained in the absence of the judgment module determines that the second time shifting broadcasting identifier is
The second initial time for asking broadcasting, the initial time as second time shifting broadcasting request.
Further, the direct broadcast time-shift device based on HLS protocol further include: update module；
The update module is used for corresponding of the time shifting broadcasting identifier that will be recorded in memory in the adjustment module
Begin the moment, after the initial time as second time shifting broadcasting request, it is corresponding to update the second time shifting broadcasting identifier
TS slicing files in the played file of M3U8 format.
The implementation of the embodiments of the present invention has the following beneficial effects:
Direct broadcast time-shift method and device provided in an embodiment of the present invention based on HLS protocol first receives what client was initiated
Time shifting broadcasting request, further according to the channel identication and initial time in request, the text of the starting TS slicing files to be retrieved of determination
Part title is then based on file name and searches and record corresponding TS slicing files, to generate the broadcasting of corresponding M3U8 format
Played file is finally sent to client by file.It needs to set concordance list, the technology of the present invention in advance compared with the prior art
Directly the time is written in the TS file name in M3U8 file for scheme, independent index file is not depended on, to reduce lookup
The time-consuming of index file improves time shift efficiency.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of embodiment of the direct broadcast time-shift method provided by the invention based on HLS protocol；
Fig. 2 is the flow diagram of another embodiment of the direct broadcast time-shift method provided by the invention based on HLS protocol；
Fig. 3 is a kind of structural schematic diagram of embodiment of the direct broadcast time-shift device provided by the invention based on HLS protocol.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1
It is a kind of process signal of embodiment of the direct broadcast time-shift method provided by the invention based on HLS protocol referring to Fig. 1
Figure.The method comprising the steps of 101 to step 104.
Step 101: receiving the request of the first time shifting broadcasting.
In the present embodiment, the first time shifting broadcasting request include: the first channel identifier, the first time shifting broadcasting identifier and
Request the first initial time played；Wherein, time shifting broadcasting identifier is for the corresponding client of the currently playing request of unique identification
End.
In the present embodiment, user operates on the client, need to carry out time shifting broadcasting, client is according to user operation records phase
The initial time that the channel identifier and request answered play generates corresponding time shifting broadcasting request with this.Each time shifting broadcasting is asked
Seek a corresponding unique time shifting broadcasting identifier.
Step 102: according to the first channel identifier and the first initial time, the starting TS slicing files to be retrieved of determination
File name.
In the present embodiment, the corresponding memory space of channel identifier is stored with several and is sliced according to the TS named constantly
File, and the playing duration of each TS slice file is N, what each TS was sliced file is the starting playing time according to itself
To name；N≥2.The corresponding memory space of each channel stores the TS slice file of the channel recording.The present invention is according to frequency
Road identifier enters corresponding memory space, further according to initial time, the filename of the starting TS slicing files to be retrieved of determination
Claim.Playing duration N can be configured according to the actual situation, but the preferred time is 10 seconds, so that TS slice file will not be too
Greatly, playing time shift will not be too short.
Step 103: searching and record corresponding TS slicing files, based on file name to generate corresponding M3U8 format
Played file.
In the present embodiment, step 103 specifically: searched based on file name and record corresponding three TS fragment text
Part, and the file name of three TS slicing files is ranked up, and generates the played file of corresponding M3U8 format；Wherein, it plays
First TS slicing files of file are starting TS slicing files.
Step 104: sending the played file of M3U8 format.
As a kind of citing of the present embodiment, the direct broadcast time-shift method of the present embodiment further include:
Receive the request of the second time shifting broadcasting；Second moves broadcast identifier and asks when parsing the request of the second time shifting broadcasting to obtain
Seek the second initial time of broadcasting；Judge that the second time shifting broadcasting identifier whether there is；It if it exists, then should by what is recorded in memory
The corresponding initial time of time shifting broadcasting identifier, the initial time as the request of the second time shifting broadcasting；It if it does not exist, then will parsing
The second initial time that the request of acquisition plays, the initial time as the request of the second time shifting broadcasting.
In this citing, when requesting again, unanimously due to time shifting broadcasting identifier (UID), server has recorded the time shift
The corresponding initial time start of broadcast identifier, server can be to start plus the when long-time of 1 TS slicing files.
Further, if the second time shifting broadcasting identifier exists, it is corresponding to update the second time shifting broadcasting identifier
TS slicing files in the played file of M3U8 format.Every time when request, M3U8 file content only increases a newest TS newly
Fragment, and delete a TS fragment at most.Server does client-information records according to UID, moreover after entering time shift,
It is that player is automatically performed that follow-up play, which please demand perfection,.
Correspondingly, referring to fig. 2, Fig. 2 is a kind of embodiment of the direct broadcast time-shift device provided by the invention based on HLS protocol
Structural schematic diagram.As shown in Fig. 2, the device includes: the first receiving module 201, determining module 202, generation module 203 and hair
Send module 204.
Wherein, the first receiving module 201 is for receiving the request of the first time shifting broadcasting；Wherein, the first time shifting broadcasting request packet
It includes: the first initial time that the first channel identifier, the first time shifting broadcasting identifier and request play；Wherein, time shifting broadcasting mark
Symbol is known for the corresponding client of the currently playing request of unique identification.
Determining module 202 is used for according to the first channel identifier and first initial time, the starting to be retrieved of determination
The file name of TS slicing files.
Generation module 203 is used to search and record corresponding TS slicing files based on file name, corresponding to generate
The played file of M3U8 format.
Sending module 204 is used to send the played file of M3U8 format.
In the present embodiment, generation module 203 is specifically used for: being searched based on file name and records corresponding three TS points
Piece file, and the file name of three TS slicing files is ranked up, and generates the played file of corresponding M3U8 format；Wherein,
First TS slicing files of played file are starting TS slicing files.
As a kind of citing of the present embodiment, the direct broadcast time-shift device of the invention based on HLS protocol further include: second connects
Receive module, parsing module, judgment module, adjustment module and update module.
Wherein, second receiving module is for receiving the request of the second time shifting broadcasting.When parsing module is for parsing second
Second moves broadcast identifier and requests the second initial time played when moving playing request to obtain.Judgment module is for judging institute
Stating the second time shifting broadcasting identifier whether there is.Adjustment module is used to determine that the second time shifting broadcasting identifier is to deposit in judgment module
When, the corresponding initial time of time shifting broadcasting identifier that will be recorded in memory, as the second time shifting broadcasting request starting
Moment；And the request in the absence of judgment module determines that the second time shifting broadcasting identifier is, parsing to be obtained plays
The second initial time, as the second time shifting broadcasting request initial time.Update module is used for will be in memory in adjustment module
The corresponding initial time of time shifting broadcasting identifier of record after the initial time as the request of the second time shifting broadcasting, updates the
TS slicing files in the played file of the corresponding M3U8 format of two time shifting broadcasting identifiers.
Therefore the time shifting broadcasting method and device provided in an embodiment of the present invention based on HLS protocol, first receive client
The time shifting broadcasting request that end is initiated, further according to the channel identication and initial time in request, the starting TS fragment to be retrieved of determination
The file name of file is then based on file name and searches and record corresponding TS slicing files, to generate corresponding M3U8 lattice
The played file of formula, is finally sent to client for played file.It needs to set concordance list in advance compared with the prior art, this
Directly the time is written in the TS file name in M3U8 file for inventive technique scheme, independent index file is not depended on, to subtract
Lack the time-consuming for searching index file, improves time shift efficiency.
Embodiment 2
It is the stream of another embodiment of the direct broadcast time-shift method provided by the invention based on HLS protocol referring to Fig. 3, Fig. 3
Journey schematic diagram.The method comprising the steps of as shown in Figure 3 301 to step 304, and each step is specific as follows:
Step 301: receiving the time shifting broadcasting request that client is initiated；Wherein, time shifting broadcasting request includes: channel identication
The initial time that symbol, time shifting broadcasting identifier and request play.
In the present embodiment, user operates on the client, need to carry out time shifting broadcasting, client is according to user operation records phase
The initial time that the channel identifier and request answered play generates corresponding time shifting broadcasting request with this.Each time shifting broadcasting is asked
Seek a corresponding unique time shifting broadcasting identifier.
Step 302: according to channel identifier and initial time, retrieval in the corresponding memory space of channel identifier whether
File is sliced in the presence of the TS to match with initial time.
In the present embodiment, the corresponding memory space of channel identifier is stored with several and is sliced according to the TS named constantly
File, and the playing duration of each TS slice file is N, what each TS was sliced file is the starting playing time according to itself
To name；N≥2.The corresponding memory space of each channel stores the TS slice file of the channel recording.The present invention is according to frequency
Road identifier enters corresponding memory space, is sliced file with the presence or absence of corresponding TS further according to initial time retrieval.When broadcasting
Long N can be configured according to the actual situation, but the preferred time is 10 seconds, so that TS slice file is not too large, when broadcasting
Shifting will not be too short.
In the present embodiment, step 302 specifically: initial time is converted to the first time of string format, and root
Enter corresponding memory space according to channel identifier, retrieving in memory space has identical name with the presence or absence of with first time
TS is sliced file.Since the file of memory space storage to name constantly, and the initial time in time shifting broadcasting request needs to convert
After string format, retrieval matching just can be carried out.
Step 303: when retrieving the first TS slice file matched with initial time, when according to initial time and playing
Long N retrieves next TS slice file in the corresponding memory space of channel identifier, until retrieving M TS slice file.
In the present embodiment, M >=2；File is sliced comprising the first TS in M TS slice file.When retrieving with starting
When carving matched first TS slice file, server records the initial time in memory.
In the present embodiment, step 303 specifically includes step A to step C, and each step is specific as follows:
Step A: after retrieving the first TS slice file, initial time being increased i*N seconds, and will be after increase i*N seconds
Initial time is converted to the i+1 time of string format, retrieves identical with the presence or absence of having with the i+1 time in memory space
The TS of name is sliced file；Wherein, i≤M-1, and the initial value of i is 1；If it is present executing step B；Otherwise, step is executed
Rapid C；
Step B: will there is the TS of identical name to be sliced file with the i+1 time, be sliced file as i+1 TS, then
The value of i is added 1；If i is equal to M, confirmation retrieves M TS slice file, otherwise return step A；
Step C: terminate retrieval.
In the present embodiment, the TS slice file in memory space is named according to the starting play time of itself, each
TS is sliced file playing duration having the same again, so when that can be played by increasing after retrieving a TS slice file
Long N is sliced file to retrieve next TS.
It can also include: literary when retrieving the first TS slice before executing step A as a kind of citing of the present embodiment
After part, initial time is increased N-1 second, and the initial time after increase N-1 seconds is converted into the first to be checked of string format
The rope time is retrieved in memory space with the presence or absence of the TS slice file with the time to be retrieved with identical name；If it is not,
Execute step A；Otherwise, step C is executed.
This citing first increases N-1 seconds, is retrieved with this, can be avoided missing for TS slice file, to improve implementation
The stability of example.
Step 304: file being sliced according to M TS, the M3U8 file comprising time shifting broadcasting identifier is generated, for client
M3U8 file is downloaded, time shifting broadcasting is completed.
In the present embodiment, each M3U8 file corresponds to a time shifting broadcasting identifier.When client is requested again
When M3U8 file, server first judges whether the time shifting broadcasting identifier has existed, if it is present being old request, service
Device generates the memory record time plus the new initial time obtained after a playing duration as the logic parameter of program
New M3U8 file.Only newly-increased one newest TS is sliced file to the content of new M3U8 file, and erasing time is at most
TS is sliced file.
If server does not find the time shifting broadcasting identifier, with the side of the step 301 of the present embodiment to step 304
Method executes.
Therefore the direct broadcast time-shift method provided by the invention based on HLS protocol, first receive the time shift that client is initiated
Playing request, further according to the channel identifier and initial time in request, retrieval is with the presence or absence of the TS slice file to match；Such as
Fruit has, then continues to retrieve according to initial time and playing duration N, until retrieving M TS slice file；Finally according to M TS
It is sliced file, the M3U8 file comprising time shifting broadcasting identifier is generated, for client downloads and carries out time shifting broadcasting.Compared to
The prior art needs to set concordance list in advance, and technical solution of the present invention does not depend on independent index file, realizes any duration
Time shifting broadcasting not only saves the space of server, but also improves time shift efficiency.
Embodiment 3
Referring to fig. 4, Fig. 4 is the stream of another embodiment of the direct broadcast time-shift method provided by the invention based on HLS protocol
Journey schematic diagram.The present embodiment the difference from example 2 is that, the time shifting broadcasting method of the present embodiment further include:
Step D: when the TS not retrieved with first time has identical name is sliced file, initial time is increased
J seconds, and the initial time after increasing j second is converted into time to be retrieved of jth+1 of string format, it is in retrieval memory space
It is no to there is the TS slice file that there is identical name with the time to be retrieved of jth+1.If it does not exist, then executing step E；Otherwise,
Execute step F.
In the present embodiment, j≤M-1, and the initial value of j is 1.
Step E: it is sliced file with the TS that the second time to be retrieved had identical name if do not retrieved, by j's
Value plus 1, return step D.
Step F: by+1 time of jth have identical name TS be sliced file, as the first TS be sliced file, further according to rise
Begin moment and playing duration N, next TS slice file is retrieved in the corresponding memory space of channel identifier, until retrieving
M TS is sliced file.
In this citing, server will record+1 time of jth, and in this, as the initial time of this time shifting broadcasting, will
Matched TS slice file is sliced file as the first TS, then executes step 104.
In order to more illustrate technical solution of the present invention, can be further detailed using following examples:
1, the file of channel identifier is created, TS slice is recorded, a new TS is recorded within every ten seconds and is sliced file, file
Title is as follows:
Live-2018-06-01_09:37:20.ts；
Live-2018-06-01_09:37:30.ts；
Live-2018-06-01_09:37:40.ts。
2, client initiates time shifting broadcasting request, requests as follows:
Http:// southtv.cn/api/timeshift? gid=cctv1&uid=abceadfadf&start=
1527817030
Wherein, gid is channel identifier, and uid is user's secondary time shifting broadcasting unique identifier, and start is initial time
(from zero second on the stroke of midnight January 1 in 1970).
3, after server receives request, channel identifier file is initially entered, start is switched to character string by cctv1
The time of format is Live-2018-06-01_09:37:10.ts after conversion.
4, server checks that file name whether there is, and there is no then start is added 1 second, is then again converted to character
The filename of string format: Live-2018-06-01_09:37:11.ts.
5, server recycles aforesaid operations, until finding corresponding TS slice file.Due to 10 seconds TS, so this time
Step at most carries out 9 times, until hitting Live-2018-06-01_09:37:20.ts file, records look in memory at this time
The corresponding initial time START of TS slice file arrived.
6, next TS slice file is found again, and the START of record is assigned to start, start plus 9 second, (for
Avoid missing TS slice) and then it is again converted to the filename of string format: Live-2018-06-01_09:37:
29.ts.File is not present, then after start adds 1 second, is converted to Live-2018-06-01_09:37:30.ts, finds corresponding
File is recorded.
7, this logic is repeated, until finding three TS slice files, then starts to generate M3U8 file.
Therefore the #EXT-X-MEDIA-SEQUENCE parameter in the M3U8 file of the prior art is every according to 1 step-length
Secondary increase, and it is the search procedure of subsequent slicing files according to step-length 1 that the present invention, which only has when searching first slicing files,
The step-length of middle #EXT-X-MEDIA-SEQUENCE parameter according to circumstances can be changed, and can be the numbers less than 9 such as 5,6,7 (because every
10 seconds slicing files), it so can shorten retrieval time, improve time shift efficiency.
In addition, the present embodiment other than the beneficial effect with embodiment 1, is not retrieving and initial time phase also
When the TS slice file matched, after initial time is increased j seconds, then is retrieved, recycle above-mentioned steps, match until retrieving
TS be sliced file, improve the fault-tolerance and practicability of entire technical solution.
Embodiment 4
It is a kind of structure of embodiment of the direct broadcast time-shift device provided by the invention based on HLS protocol referring to Fig. 5, Fig. 5
Schematic diagram.As shown in figure 5, the time shifting broadcasting device includes: receiving module 501, the first retrieval module 502, the second retrieval module
503 and generation module 504.
Wherein, receiving module 501 is used to receive the time shifting broadcasting request of client initiation；Wherein, time shifting broadcasting request packet
It includes: the initial time that channel identifier, time shifting broadcasting identifier and request play.
First retrieval module 502 is used for according to channel identifier and initial time, and retrieval is deposited channel identifier is corresponding
File is sliced with the presence or absence of the TS to match with initial time in storage space；Wherein, the corresponding memory space of channel identifier is deposited
It contains several and is sliced file according to the TS named constantly, and the playing duration of each TS slice file is N；N≥2.
Second retrieval module 503 is used for when retrieving the first TS slice file matched with initial time, according to starting
Moment and playing duration N retrieve next TS slice file, until retrieving M in the corresponding memory space of channel identifier
A TS is sliced file；M≥2；M TS slice file includes that the first TS is sliced file.
Generation module 504 is used to be sliced file according to M TS, generates the M3U8 file comprising time shifting broadcasting identifier, with
For client downloads M3U8 file, time shifting broadcasting is completed.
In the present embodiment, the first retrieval module is used to be retrieved according to channel identifier and initial time in channel identication
It accords in corresponding memory space and is sliced file with the presence or absence of the TS to match with initial time, specifically:
Initial time is converted to the first time of string format by the first retrieval module, and is entered according to channel identifier
Corresponding memory space is retrieved in memory space with the presence or absence of the TS slice file with first time with identical name.
In the present embodiment, the second retrieval module is used to retrieve and matched first TS of initial time is sliced file
When, according to initial time and playing duration N, next TS slice file is inquired in the corresponding memory space of channel identifier,
Until retrieving M TS slice file, specifically:
Step A: after retrieving the first TS slice file, initial time being increased i*N seconds, and will be after increase i*N seconds
Initial time is converted to the i+1 time of string format, retrieves identical with the presence or absence of having with the i+1 time in memory space
The TS of name is sliced file；Wherein, i≤M-1, and the initial value of i is 1；If it is present executing step B；Otherwise, step is executed
Rapid C；
Step B: will there is the TS of identical name to be sliced file with the i+1 time, be sliced file as i+1 TS, then
The value of i is added 1；If i is equal to M, confirmation retrieves M TS slice file, otherwise return step A；
Step C: terminate retrieval.
Further, before step A, further includes:
When retrieve the first TS slice file after, by initial time increase N-1 second, and by increase N-1 seconds after starting when
The first time to be retrieved for being converted to string format is carved, is retrieved identical with the presence or absence of having with the time to be retrieved in memory space
The TS of name is sliced file；If it is not, executing step A；Otherwise, step C is executed.
As a kind of citing of the present embodiment, time shifting broadcasting device can also include third retrieval module.This citing it is detailed
Thin steps flow chart can be, but not limited to the associated description referring to embodiment 3.
Third retrieval module is used to execute step D to step F, specifically:
Step D: when the TS not retrieved with first time has identical name is sliced file, initial time is increased
J seconds, and the initial time after increasing j second is converted into time to be retrieved of jth+1 of string format, it is in retrieval memory space
It is no to there is the TS slice file that there is identical name with the time to be retrieved of jth+1；Wherein, j≤M-1, and the initial value of j is 1；Such as
Fruit is not present, and thens follow the steps E；Otherwise, step F is executed；
Step E: it is sliced file with the TS that the second time to be retrieved had identical name if do not retrieved, by j's
Value plus 1, return step D；
Step F: by+1 time of jth have identical name TS be sliced file, as the first TS be sliced file, further according to rise
Begin moment and playing duration N, next TS slice file is retrieved in the corresponding memory space of channel identifier, until retrieving
M TS is sliced file.
Therefore the direct broadcast time-shift device provided in an embodiment of the present invention based on HLS protocol, it first receives client and initiates
Time shifting broadcasting request, further according to the channel identifier and initial time in request, retrieval is with the presence or absence of the TS slice to match
File；If so, then continuing to retrieve according to initial time and playing duration N, until retrieving M TS slice file；Last root
Be sliced file according to M TS, generate include time shifting broadcasting identifier M3U8 file, for client downloads and carry out time shift and broadcast
It puts.Need to set concordance list compared with the prior art in advance, technical solution of the present invention does not depend on independent index file, realizes and appoints
The time shifting broadcasting for duration of anticipating not only saves the space of server, but also improves time shift efficiency.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the program can be stored in a computer-readable storage medium
In, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic
Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access
Memory, RAM) etc..
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (8)
1. a kind of direct broadcast time-shift method based on HLS protocol characterized by comprising
Receive the request of the first time shifting broadcasting；Wherein, when the first time shifting broadcasting request includes: the first channel identifier, first
Move the first initial time of broadcast identifier and request broadcasting；Wherein, time shifting broadcasting identifier is currently playing for unique identification
Request corresponding client；
According to first channel identifier and first initial time, the file of the starting TS slicing files to be retrieved of determination
Title；
Corresponding TS slicing files are searched and record, based on the file name to generate the broadcasting text of corresponding M3U8 format
Part；
Send the played file of the M3U8 format.
2. the direct broadcast time-shift method based on HLS protocol according to claim 1, which is characterized in that described to be based on the file
Corresponding TS slicing files are searched and recorded to title, to generate the played file of corresponding M3U8 format, specifically:
Corresponding three TS slicing files, and the file of three TS slicing files are searched and recorded based on the file name
Title is ranked up, and generates the played file of corresponding M3U8 format；
Wherein, first TS slicing files of the played file are the starting TS slicing files.
3. the direct broadcast time-shift method based on HLS protocol according to claim 1, which is characterized in that further include:
Receive the request of the second time shifting broadcasting；
Second moves broadcast identifier and requests the second initial time played when parsing the second time shifting broadcasting request to obtain；
Judge that the second time shifting broadcasting identifier whether there is；
If it exists, then the corresponding initial time of time shifting broadcasting identifier that will be recorded in memory, broadcasts as second time shift
Put the initial time of request；
If it does not exist, then the second initial time played the request that the parsing obtains, is asked as second time shifting broadcasting
The initial time asked.
4. the direct broadcast time-shift method according to claim 3 based on HLS protocol, which is characterized in that if second time shift
Broadcast identifier exists, and further comprises:
Update the TS slicing files in the played file of the corresponding M3U8 format of the second time shifting broadcasting identifier.
5. a kind of direct broadcast time-shift device based on HLS protocol characterized by comprising the first receiving module, determining module, life
At module and sending module；
Wherein, first receiving module is for receiving the request of the first time shifting broadcasting；Wherein, the first time shifting broadcasting request packet
It includes: the first initial time that the first channel identifier, the first time shifting broadcasting identifier and request play；Wherein, time shifting broadcasting mark
Symbol is known for the corresponding client of the currently playing request of unique identification；
The determining module is used for according to first channel identifier and first initial time, the starting to be retrieved of determination
The file name of TS slicing files；
The generation module is used to search and record corresponding TS slicing files based on the file name, corresponding to generate
The played file of M3U8 format；
The sending module is used to send the played file of the M3U8 format.
6. the direct broadcast time-shift device according to claim 5 based on HLS protocol, which is characterized in that the generation module tool
Body is used for: search and record corresponding three TS slicing files based on the file name, and three TS slicing files
File name is ranked up, and generates the played file of corresponding M3U8 format；
Wherein, first TS slicing files of the played file are the starting TS slicing files.
7. the direct broadcast time-shift device according to claim 5 based on HLS protocol, which is characterized in that further include: second receives
Module, parsing module, judgment module and adjustment module；
Wherein, second receiving module is for receiving the request of the second time shifting broadcasting；
The second shifting broadcast identifier and request are broadcast when the parsing module is for parsing the second time shifting broadcasting request to obtain
The second initial time put；
The judgment module is for judging that the second time shifting broadcasting identifier whether there is；
The adjustment module is used in the presence of the judgment module determines that the second time shifting broadcasting identifier is, will be in memory
The corresponding initial time of time shifting broadcasting identifier of record, the initial time as second time shifting broadcasting request；And
For in the absence of the judgment module determines that the second time shifting broadcasting identifier is, the request that the parsing obtains to be broadcast
The second initial time put, the initial time as second time shifting broadcasting request.
8. the direct broadcast time-shift device according to claim 7 based on HLS protocol, which is characterized in that further include: update mould
Block；
The update module is used in the corresponding starting of described time shifting broadcasting identifier for will recording in memory of adjustment module
It carves, after the initial time as second time shifting broadcasting request, updates the corresponding M3U8 of the second time shifting broadcasting identifier
TS slicing files in the played file of format.
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