CN102572555A - Method and system for realizing live video playback at HTTP live streaming (HLS) client - Google Patents
Method and system for realizing live video playback at HTTP live streaming (HLS) client Download PDFInfo
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Abstract
The invention discloses a method for realizing live video playback at an HTTP live streaming (HLS) client, which comprises the following steps: sending a program playback request and a program playback time point to a streaming media scheduling gateway media access platform (MAP) by the HLS client; receiving a playlist file dynamically generated by the streaming media scheduling gateway MAP according to the time point and a corresponding index file acquired from a storage module; and requesting video clips from a streaming distribution module according to the playlist file. The invention also discloses a system for realizing the live video playback at the HLS client, which comprises the streaming media scheduling gateway MAP, the streaming distribution module and the storage module. By adopting the method and the system for realizing the live video playback at the HLS client, the video playback can be realized at the HLS client without rewriting a hypertext transport protocol (HTTP) server, thereby, the network construction cost is saved, and the user experience is improved.
Description
Technical field
The present invention relates to internet video play-back technology field, relate in particular to the method and system that the net cast of a kind of HLS of realization client is reviewed.
Background technology
HTTP Live Streaming client (hereinafter to be referred as HLS, network direct broadcasting) based on Apple is abandoned special streaming media server, and the Web server that returns the use standard transmits media data; The continuous media data that capacity is huge are carried out segmentation, and the small documents that is divided into One's name is legion transmits, and have catered to the file transfer characteristic of Web server; And the lightweight index file that adopts a continual renovation is controlled download and the broadcast of cutting apart the little media file in back, can support live simultaneously and program request, and the operation of VCR class session control.The use of http protocol has reduced the deployment difficulty of HTTP Live Streaming system, has also simplified client (particularly embedded mobile terminal) Development of Software complexity simultaneously.In addition, the introducing of file division and index file also makes bandwidth between self adaptation stream, switch, server failure is protected and media encryption etc. becomes convenient.But owing to adopt the http web service of the most basic http agreement, standard; Characteristics have no idea on HLS, directly to realize that promptly the agreement of HLS acquiescence is only supported the live of standard and some broadcast mode to make that the time shift that can realize down at traditional rtsp (real time streaming transport protocol) is reviewed etc.
A kind of technical scheme that addresses the above problem is to rewrite HTTP Server at present, and the mode that some time shifts are supported in expansion adopts off-gauge HLS agreement.But this mode does not meet the standard of HLS, run counter to the original intention of HLS design, and the website of realizing in this way also can't be through the authentication of Apple yet; And, on HTTP Server, have a large amount of exploitations.
Summary of the invention
Technical problem to be solved by this invention is, the method and system that provide a kind of HLS of realization client video to review on the basis of not rewriting http server, can realize that HLS client use http protocol carries out video and reviews.
In order to solve the problems of the technologies described above; On the one hand; Embodiments of the invention provide a kind of HLS of realization client method that net cast is reviewed; Comprise: said HLS client is reviewed program request to the network side stream media scheduling gateway MAP request of sending, and the time point that request is reviewed is sent to said network side stream media scheduling gateway; Receive said network side stream media scheduling gateway MAP obtains the video-frequency band that comprises temporal information and corresponding time according to said time point and from the network side storing module the dynamic play list file that comprises corresponding video sector address information that generates of index for address information file; Address information according to each video-frequency band in the play list file is obtained corresponding video-frequency band to network side stream distribution module successively.
Said HLS client is sent to network side stream media scheduling gateway MAP and is reviewed program request; And the time point that request is reviewed is sent to said network side stream media scheduling gateway comprise: HLS client-access electronic program guides iEPG; Show the introduction and the internet video that is connected reception user selection of internet video, send the program request of reviewing of the time point that comprises that request is reviewed and give electronic program guides iEPG; After electronic program guides iEPG receives the request of HLS client, send to network side stream media scheduling gateway MAP to the address of internet video.
Before the said network side stream media scheduling of said reception gateway MAP obtains the address information of the video-frequency band that comprises temporal information and corresponding time according to said time point and from the network side storing module index file dynamically generates the step of the play list file that comprises corresponding video sector address information; Also comprise step: said network side stream media scheduling gateway MAP judges that according to the address of said internet video this internet video is live when reviewing video, obtains the time point that user's request is reviewed.
Said video-frequency band and corresponding index file are stored in the said network side storing module, said network side storing module respectively with said network side stream distribution module and said network side stream media scheduling gateway MAP data interaction.
Particularly, said network side stream distribution module is a http server.
On the other hand, embodiments of the invention provide a kind of HLS of realization client system that net cast is reviewed, and comprising: network side stream media scheduling gateway MAP, network side stream distribution module, network side storing module; Said network side stream media scheduling gateway MAP is used for behind the time point that the said HLS client-requested of reception is reviewed; From said network side storing module, obtain corresponding index file, and dynamically generate play list file according to time point and the corresponding index file that described request is reviewed; Said network side stream distribution module is distributed corresponding video-frequency band successively according to the play list file that is generated and is given said HLS client.
Also comprise: network side video code conversion module, network effluent packetization module; Said network side video code conversion module is used for after the video-see request that receives the HLS client, and the video code conversion that will obtain from the Internet forms video flowing; After said network effluent packetization module is used to receive said video flowing, cuts apart said video flowing and generate video-frequency band and corresponding index file.
Said network effluent packetization module is cut apart said video flowing according to apple self adaptation stream protocol.
Said video-frequency band and corresponding index file are stored in the said network side storing module, said network side storing module respectively with said network side stream distribution module and said network side stream media scheduling gateway MAP data interaction.
Particularly, said network side stream distribution module is a http server.
The embodiment of the invention has following advantage or beneficial effect:
Adopt network side stream media scheduling gateway MAP to receive the time point that the HLS client-requested is reviewed program, and, dynamically generate play list file, send to the HLS client according to this time point and the corresponding index file that from the network side storing module, obtains; The HLS client according to this play list file to network side Streaming Media distribution module request video-frequency band, thereby realize that video reviews.Utilize video provided by the invention to review method; Need not rewrite http server; Do not need updating client can realize easily that the HLS client carries out video and review under http protocol yet, practiced thrift cost significantly, and improved the Experience Degree that user video is watched.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the flow chart that realization HLS client video is reviewed method in an embodiment of the present invention;
Fig. 2 is the structured flowchart that realization HLS client video is reviewed system in an embodiment of the present invention;
Realization HLS client video is reviewed the structured flowchart of system among the another kind of embodiment of Fig. 3 the present invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
With reference to accompanying drawing embodiments of the invention are described below.Referring to Fig. 1, review the flow chart of a kind of embodiment of method for realizing the net cast of HLS client among the present invention.
In the present embodiment, realize that the method that HLS client video is reviewed may further comprise the steps:
The S101:HLS client is reviewed program request to the network side stream media scheduling gateway MAP request of sending, and the time point that request is reviewed is sent to said network side stream media scheduling gateway;
S102: the time point that network side stream media scheduling gateway MAP reviews according to the request that receives; From the network side storing module, obtain the index file of the address information of the video-frequency band that comprises temporal information and corresponding time; And dynamically generate the play list file that comprises corresponding video sector address information according to this time point and index file, send to the HLS client;
After the S103:HLS client receives this play list file, according to the address information of this each video-frequency band of play list file successively to network side stream distribution module request video-frequency band.
Need to prove; Above-mentioned index file comprises that time point reaches the positional information of the video-frequency band corresponding with this time point; Address like the corresponding video-frequency band of 005s is http://media.IIS.com/segment1.ts; The address of the video-frequency band that 010s is corresponding is http://media.IIS.com/segment2.ts, and the address of the video-frequency band that 015s is corresponding is http://media.IIS.com/segment3.ts.If the time point that user's request is reviewed is 010s, the file in the play list file will be followed successively by http://media.IIS.com/segment2.ts so, http://media.IIS.com/segment3.ts.That is, play list file is to generate according to the time point that index file and user request is reviewed, and comprises the address information of the video-frequency band that will play in the play list file, and these video-frequency bands still are stored in the network side storing module 203.After network side stream media scheduling gateway MAP sends to the HLS client with the play list file that generates, the HLS client according to this play list file to the corresponding video-frequency band of network side stream distribution module request, thereby realize live reviewing.
Adopt network side stream media scheduling gateway MAP to review time point and dynamically generate play list file according to request; Can satisfy the demand that HLS client video is reviewed well; And need not rewrite http server, and practiced thrift cost, also improved user experience.
In another kind of embodiment, realize that the method that HLS client video is reviewed may further comprise the steps:
S201:HLS client-access electronic program guides iEPG, the introduction that shows internet video with link, receive the internet video that the user selects, send the program request of reviewing of the time point that comprises that request is reviewed and give electronic program guides iEPG;
S202: electronic program guides iEPG receive the HLS client review program request after, send to network side stream media scheduling gateway MAP to the address of internet video;
S203: network side stream media scheduling gateway MAP judges that this internet video is live when reviewing video, obtains the time point that user's request is reviewed through the HLS client, and reviews time point and index file dynamically generates play list file according to this.MPTS initial in the play list file is for asking to review the MPTS of start time point, and the MPTS of end is a MPTS of reviewing program end time point.Wherein, index file is generated by networking effluent packetization module.
S204: network side stream media scheduling gateway MAP sends to the HLS client with play list file;
After the S205:HLS client receives this play list file, according to the address information of this each video-frequency band of play list file successively to network side stream distribution module request video-frequency band;
The S206:HLS client continues displaying video according to the video-frequency band of obtaining.
Certainly, video is reviewed and is meant and watches the video program stream of having seen once more.The HLS client is being carried out live or order video when watching; At first visit the URL that iEPG (electronic program guides) obtains internet video; Obtained corresponding video and carried out transcoding according to the transcoding parameter by the video code conversion module, the video flowing that then transcoding is formed sends to network effluent packetization module; After network effluent packetization module receives this video flowing, video is cut apart formation video-frequency band and corresponding index file.These video-frequency bands and corresponding index file all are stored in the network side storing module.But also can be set memory time, promptly the user can review the term of validity of this program.When the user need review; The time point that needs are reviewed sends to network side stream media scheduling gateway MAP; Network side stream media scheduling gateway MAP returns to the HLS client after dynamically generating play list file according to this time point and the index file that from the network side storing module, obtains; The HLS client is obtained corresponding video-frequency band to network side stream distribution module successively according to the address information of each video-frequency band in the play list file that receives, thereby the realization video is reviewed.
In one embodiment, network side stream distribution module is a http server, and network side stream media scheduling gateway MAP is the stream media scheduling gateway that interactive television system adopts.
And network effluent packetization module is cut apart the video flowing that receives according to apple self adaptation stream (Apple Adaptive Streaming) agreement.
If the HLS client-requested is live or order video, the network side storing module directly sends to client with index file, by client according to this play list file to network side stream distribution module, i.e. http server request video flowing.
Suppose the corresponding http server of media.IIS.com, then connect as follows:
#EXT-X-MEDIA-SEQUENCE：0
#EXT-X-TARGETDURATION：10
#EXTINF：10，
http://media.IIS.com/segment1.ts
#EXTINF：10，
http://media.IIS.com/segment2.ts
#EXTINF：10，
http://media.IIS.com/segment3.ts
#EXT-X-ENDLIST
The HLS client according to index file to http server, i.e. media.IIS.com order request video flowing, i.e. segment1.ts, segment2.ts, segment3.ts.
If will there be the #EXT-X-ENDLIST end mark in live TV stream, the HLS client reads this play list file per 10 seconds again according to #EXT-X-TARGETDURATION:10; If program request or review, the HLS client according to disposable index file or the play list file of reading of #EXT-X-ENDLIST end mark to internal memory, the corresponding video-frequency band of dynamic requests in order then; Distribution of video section after, obtain this video-frequency band and continuously play in order by the HLS client for http server.
The system that realizes that HLS client video is reviewed is provided in an embodiment of the present invention.Please refer to Fig. 2; This system comprises network side stream media scheduling gateway 202, network side storing module 203, network side stream distribution module 204; When video was reviewed in 201 requests of HLS client, the time point that request is reviewed sent to network side stream media scheduling gateway 202.The time point that network side stream media scheduling gateway 202 is reviewed according to this request reads corresponding index file from network side storing module 203; And time point and index file according to this request is reviewed dynamically generate play list file, and this play list file is sent to HLS client 201.HLS client 201 is asked video flowings according to this play list file to network side stream distribution module 204.Wherein follow http protocol between HLS client 201 and network side stream distribution module 204, the network side stream media scheduling gateway 202.
Please refer to Fig. 3; Among the another kind of embodiment, realize that the system that HLS client video is reviewed comprises: network side stream media scheduling gateway 202, network side storing module 203, network side stream distribution module 204, network effluent packetization module 205, network side video code conversion module 206.Network side video code conversion module 206 sends to network effluent packetization module 205 after being used for obtaining video and this video being formed video flowing according to transcoding parameter transcoding from the Internet according to the live or order request of HLS client 201; 205 pairs of video flowings that receive of network effluent packetization module are cut apart formation video-frequency band and corresponding index file, and video-frequency band and corresponding index file are stored in the network side storing module 203.Particularly, network effluent packetization module 205 flows according to apple self adaptation stream protocol (Apple Adaptive Streaming) divided video.
Need to prove that the HLS client of mentioning among the present invention is meant the terminal of following apple self adaptation stream (Apple Adaptive Streaming) standard, like terminals such as Iphone, Ipad, Ipod, Itouch, mac.
The embodiment of the invention has following advantage or beneficial effect: adopt network side stream media scheduling gateway MAP to receive the time point that the HLS client-requested is reviewed, the corresponding index file that from the network side storing module, obtains dynamically generates play list file and sends to the HLS client; The HLS client according to this play list file to network side Streaming Media distribution module request video flowing, thereby realize that video reviews.Need not rewrite, under the prerequisite of practicing thrift the network struction cost, improve HLS client user's Experience Degree http server.
Device embodiment described above only is schematic; Wherein said unit as the separating component explanation can or can not be physically to separate also; The parts that show as the unit can be or can not be physical locations also; Promptly can be positioned at a place, perhaps also can be distributed on a plurality of NEs.Can realize the purpose of present embodiment scheme according to the needs selection some or all of module wherein of reality.Those of ordinary skills promptly can understand and implement under the situation of not paying performing creative labour.
Above-described execution mode does not constitute the qualification to this technical scheme protection range.The modification of being done within any spirit and principle at above-mentioned execution mode, be equal to replacement and improvement etc., all should be included within the protection range of this technical scheme.
Claims (10)
1. a method that realizes that the net cast of HLS client is reviewed is characterized in that, comprising:
Said HLS client is sent to network side stream media scheduling gateway MAP and is reviewed program request, and the time point that request is reviewed is sent to said network side stream media scheduling gateway MAP;
Receive said network side stream media scheduling gateway MAP obtains the address information of the video-frequency band that comprises temporal information and corresponding time according to said time point and from the network side storing module the dynamic play list file that comprises corresponding video sector address information that generates of index file;
Address information according to video-frequency band in the play list file is obtained corresponding video-frequency band to network side stream distribution module successively.
2. the method that realization HLS client as claimed in claim 1 net cast is reviewed; It is characterized in that; Network effluent packetization module is cut apart said video flowing and is generated video-frequency band and corresponding index file after receiving the video flowing of network side video code conversion module according to the formation of internet video transcoding.
3. the method that realization HLS client as claimed in claim 1 net cast is reviewed; It is characterized in that; Said video-frequency band and corresponding index file are stored in the said network side storing module, said network side storing module respectively with said network side stream distribution module and said network side stream media scheduling gateway MAP data interaction.
4. the method for claim 1 is characterized in that, said HLS client is sent to network side stream media scheduling gateway MAP and reviewed program request, and the time point that request is reviewed is sent to said network side stream media scheduling gateway comprises:
HLS client-access electronic program guides iEPG shows the introduction and the internet video that is connected reception user selection of internet video, sends the program request of reviewing of the time point that comprises that request is reviewed and gives electronic program guides iEPG;
Electronic program guides iEPG receive the HLS client review program request after, send to network side stream media scheduling gateway MAP to the address of internet video.
5. method as claimed in claim 4; It is characterized in that; Before the said network side stream media scheduling of said reception gateway MAP obtains the address information of the video-frequency band that comprises temporal information and corresponding time according to said time point and from the network side storing module index file dynamically generates the step of the play list file that comprises corresponding video sector address information, also comprise step:
Said network side stream media scheduling gateway MAP judges that according to the address of said internet video this internet video is live when reviewing video, obtains the time point that user's request is reviewed.
6. a system that realizes that the net cast of HLS client is reviewed is characterized in that, comprising: network side stream media scheduling gateway MAP, network side stream distribution module, network side storing module; Said network side stream media scheduling gateway MAP is used for behind the time point that the said HLS client-requested of reception is reviewed; From said network side storing module, obtain corresponding index file, and dynamically generate play list file according to time point and the corresponding index file that described request is reviewed; Said network side stream distribution module is distributed corresponding video-frequency band successively according to the play list file that is generated and is given said HLS client.
7. the system that HLS client as claimed in claim 6 net cast is reviewed is characterized in that, also comprises: network side video code conversion module, network effluent packetization module; Said network side video code conversion module is used for after the video-see request that receives the HLS client, and the video code conversion that will obtain from the Internet forms video flowing; After said network effluent packetization module is used to receive said video flowing, cuts apart said video flowing and generate video-frequency band and corresponding index file.
8. the system that HLS client as claimed in claim 7 net cast is reviewed is characterized in that, said network effluent packetization module is cut apart said video flowing according to apple self adaptation stream protocol.
9. the system that HLS client as claimed in claim 8 net cast is reviewed; It is characterized in that; Said video-frequency band and corresponding index file are stored in the said network side storing module, said network side storing module respectively with said network side stream distribution module and said network side stream media scheduling gateway MAP data interaction.
10. the system that each described HLS client net cast is reviewed like claim 6-9 is characterized in that said network side stream distribution module is a http server.
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