CN101917590A - Network live broadcasting system with playback function and player - Google Patents
Network live broadcasting system with playback function and player Download PDFInfo
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Abstract
The invention provides a network live broadcasting system with playback function and a player for solving the problem that the current live broadcasting system cannot realize random time-length playback. The system comprises a stream media server and a client, wherein the stream media server comprises a cache module for caching the received live broadcasting video. The system can distinguish the live broadcasting request and the playback request sent by the client; and when the client requests for playing back the played live broadcasting video, the stream media server can transmit the corresponding video data to the client from the cache so as to perform unlimited long-time live broadcasting playback. Moreover, the cache can accurately position a key frame by adopting the stream slicing technology and performs playing from the position of the key frame so as to realize low-delay network live broadcasting.
Description
Technical field
The present invention relates to the direct seeding technique field, particularly relate to a kind of network direct broadcasting system and a kind of player with playback function.
Background technology
Live is exactly the broadcast mode that the later stage is synthetic, broadcast is carried out simultaneously of broadcast TV program.Online Video is live to be exactly the live broadcast service of utilizing Internet resources to carry out, and the video capture by the scene uploads on the network synchronously, and the user can see the scene consulting of the very first time the same time on network.The live broadcast service of this network is widely used in network direct broadcasting services such as the news briefing carried out in real time, exhibition, product issue, product recommendations, sale outpost display, network concert, company's cocktail party, business meetings, celebration ceremony, program performance, movies-making, sports tournament, security analysis, long-distance education.
Now, many BroadVision WEBTVs are based on advanced stream media technology exploitation and form.So-called Streaming Media is meant the media formats that the mode of employing stream transmission is play at Internet.The stream transmission mode then is that multimedia files such as whole A/V and 3D are divided into compressed package one by one through special compress mode,, in real time transmission continuous to subscriber computer by video server.In the system that adopts the stream transmission mode, the user needn't wait until as adopting downloading mode that whole download of whole file finishes, but only need can play behind the multimedia file decompress(ion)s such as A/V, 3D that utilize decompression apparatus (hardware or software) to compression on the user's computer and watch through the startup time-delay of seconds or tens of seconds.The remainder of multimedia file will continue to download in the server on backstage this moment.
Usually, adopt the live of stream media technology realization, the subscriber computer end is continuous, real-time reception live data, and the user can watch the current live video that transmits, and promptly watches along with live progress.But if the video that the user has broadcasted before having missed thinks that playback replays, present live broadcast system can't realize.Even some live broadcast systems can realize, also be since this live broadcast system at subscriber computer end buffer memory the sub-fraction live data, wait after this part data cached playing, have new live data in the buffer memory again and deposit in and override original data.Therefore, the sub-fraction live data of user in can only the playback buffer memory, and this part data is very limited, and very short and small usually, can not satisfy the user and repeat to watch the demand of broadcast content.
Summary of the invention
Technical problem to be solved by this invention provides a kind of network direct broadcasting system and a kind of player with playback function, can't realize the problem of any duration playback to solve present live broadcast system.
In order to address the above problem, the invention discloses a kind of network direct broadcasting system with playback function, comprise streaming media server and client, wherein:
Described streaming media server comprises:
The live data receiver module is used to receive live video;
Cache module is used for the live video that buffer memory receives;
The playback request receiver module is used to receive the playback request that client sends;
Data acquisition module is used for according to described request, obtains corresponding live video from cache module;
Data transmission module, the live video that is used for being obtained sends to client;
Described client comprises:
The playback request sending module is used for sending playback request to streaming media server;
The video reception module is used for receiving the live video of being asked from streaming media server;
The video playback module is used to play live video.
Preferably, described system also comprises:
Live engine is used for on-the-spot generation live video, and sends to described streaming media server.
Preferably, described system also comprises:
Streaming Media storage cluster is used for the live video that the later stage includes is stored.
Preferably, described system also comprises:
Database is used for each key frame of described live video is set up index information, sets up the corresponding relation of index information and live video, and stores described index information.
Preferably, described streaming media server also comprises:
Retrieval module is used for reading index information from database, according to the position of described index information retrieval key frame in live video.
Preferably, comprise the time point of video playback in the described playback request, the time point of described video playback is corresponding with key frame; Then described retrieval module is according to described index information, the corresponding key frame of video playback time point of searching and asking, and trigger described data acquisition module and begin to obtain live video from this key frame position.
The present invention also provides a kind of player, is used for communicating with server, comprising:
The playback request sending module is used for sending playback request to server;
The video reception module is used for receiving the live video of being asked from server;
The video playback module is used to play live video.
Preferably, described player also comprises:
Live request sending module is used for sending live request to server.
Preferably, described server has been set up index information to each key frame in the live video, and has set up the corresponding relation of index information and live video; And, comprising the time point of video playback in the described request, the time point of described video playback is corresponding with key frame; Then described video reception module begins to receive live video from this key frame position.
Compared with prior art, the present invention has the following advantages:
At first, the invention provides a kind of network direct broadcasting system, mainly form by streaming media server and client, owing to live data has been carried out buffer memory at described streaming media server, therefore when live video that the client-requested playback has been broadcasted, streaming media server can be passed to client with the corresponding video data from buffer memory, carry out unlimited direct playing and playback for a long time.Like this, client just can repeatedly repeat to watch important content in real time, and can not miss the fragment of any excellence.
Secondly, described streaming media server has adopted the stream microtomy when live data is carried out buffer memory, promptly each key frame of live video is set up index information, and sets up the corresponding relation of index information and live video.Like this, streaming media server is according to described index information, just can be directly begins reading of data from the key frame of the time point correspondence of playback, and passes to client terminal playing.Therefore, the present invention has also realized quick, the accurate location of live video.
Once more, network direct broadcasting system provided by the invention can be distinguished live request and playback request that client sends in the living broadcast of programs process, and according to described index information, begins to play-over video from the key frame of the play time correspondence of request.
Description of drawings
Fig. 1 is the embodiment of the invention one described a kind of structure chart with network direct broadcasting system of playback function;
Fig. 2 is the structure chart of the embodiment of the invention two described a kind of network direct broadcasting systems;
Fig. 3 is the structure chart of the embodiment of the invention three described a kind of players.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Embodiment one:
With reference to Fig. 1, be the embodiment of the invention one described a kind of structure chart with network direct broadcasting system of playback function.
Described network direct broadcasting system mainly comprises streaming media server 1 and client 2, and wherein client 2 is used for sending request to streaming media server 1, and streaming media server 1 is used for the request of customer in response end 2, live video is sent to client 2 play.
Wherein, described client 2 mainly comprises:
Playback request sending module 21 is used for sending playback request to streaming media server 1;
Video reception module 22 is used for receiving the live video of being asked from streaming media server 1;
Video playback module 23 is used to play live video.
Wherein, described streaming media server 1 mainly comprises:
Live data receiver module 11 is used to receive live video, and described live video need pass through processes such as collection in worksite signal, coding and be made into files in stream media, passes to streaming media server 1 then;
Cache module 12 is used for the live video that buffer memory receives;
Playback request receiver module 13 is used to receive the playback request that client 1 sends;
Data acquisition module 14 is used for according to described request, obtains corresponding live video from cache module 12;
Data transmission module 15, the live video that is used for being obtained sends to client 2.
The playback process of described network direct broadcasting system is as follows:
The user is when watching live video, if missed certain section live just now content, perhaps think to watch again live just now wonderful, then can back drag the progress bar of player, at this moment this player sends playback request by playback request sending module 21 to streaming media server 1 as the client 2 of network direct broadcasting system.
The live data receiver module 11 of streaming media server 1 receives live video in live process, and deposits cache module 12 in.After playback request receiver module 13 is received playback request, owing in cache module 12, stored all just at live files in stream media, so data acquisition module 14 can with just now the video of live mistake from cache module 12, read again, and pass to client 1 by data transmission module 15.After the video reception module 22 of client 1 receives the data of playback, play by video playback module 23.
In sum, described network direct broadcasting system is different from an outstanding feature of prior art and is: be provided with cache module on streaming media server 1, live video is carried out buffer memory.And in the prior art, server does not carry out buffer memory to live video.Therefore, the described network direct broadcasting system of present embodiment can carry out direct playing and playback, and the duration of video playback only is subjected to the restriction of server buffer capacity, therefore under the enough big situation of server buffer capacity, can realize the direct playing and playback of any duration.Like this, client just can repeatedly repeat to watch important content in real time, and can not miss the fragment of any excellence.
Embodiment two:
Present embodiment is a preferred embodiment, on the basis of embodiment one, provides a kind of caching technology based on the key frame index, has realized that further net cast in time retracts the accurate location of putting.
With reference to Fig. 2, be the structure chart of the embodiment of the invention two described a kind of network direct broadcasting systems.
Described network direct broadcasting system comprises streaming media server 1 and client 2, and wherein said streaming media server 1 can comprise:
The live data receiver module is used to receive live video;
Cache module is used for the live video that buffer memory receives;
The playback request receiver module is used to receive the playback request that client sends;
Data acquisition module is used for according to described request, obtains corresponding live video from cache module;
Data transmission module, the live video that is used for being obtained sends to client.
Described client 2 can comprise:
The playback request sending module is used for sending playback request to streaming media server;
The video reception module is used for receiving the live video of being asked from streaming media server;
The video playback module is used to play live video.
Preferably, in the present embodiment, described network direct broadcasting system can also comprise:
Live engine 3 is used for on-the-spot generation live video, and sends to described streaming media server 1.
The live data receiver module that is streaming media server 1 is to receive live video from live engine 3, and is cached to cache module.
Preferably, in the present embodiment, described network direct broadcasting system can also comprise:
Streaming Media storage cluster 4 is used for the live video that the later stage includes is stored.
Described Streaming Media storage cluster 4 is the bigger storage medium of memory space such as hard disk normally, and memory space is greater than the buffer memory capacity on the streaming media server 1.
Described network direct broadcasting system is used for realizing the on-the-spot broadcasting of program and the time shift playback of live process, and its process is as follows:
It is live that live engine 3 is used to carry out live show, adopts stream media technology to make and be used for live files in stream media, and pass to streaming media server 1; Streaming media server 1 carries out buffer memory with files in stream media, receives the live request of client 2 simultaneously, in real time live files in stream media is transferred to client 2 and plays.In this live process, if client 2 is sent playback request to streaming media server 1, then streaming media server 1 reads corresponding stream media data and passes to client 2 broadcasts according to described playback request from buffer memory.After live end, live files in stream media is carried out the later stage include, and deposit Streaming Media storage cluster 4 in, can be published to VOD system afterwards and offer the Internet user and watch.
Preferably, based on the live of above-mentioned network direct broadcasting system and time shift playback function, Streaming Media storage cluster 4 in the described system and the cache module on the streaming media server 1 have all adopted the stream microtomy that live data is stored.Described stream microtomy is meant files in stream media is divided into a plurality of sections according to key frame that each section can be understood as a data block, earlier each key frame is set up index, and then stored stream media file and index information.
Wherein, frame is the least unit of stream medium data, key frame is special frame, be used for defining the variation in the video image, it is residing that frame of key operations in image motion or the variation, comprise motion of objects and characteristics (as size and color), the interpolation that interpolation or deletion object and frame move in scene etc.Whenever, when wishing image, the user changes, perhaps wish to take place certain action, must use key frame.Picture frame between key frame and the key frame can be created by software.
Therefore, in the present embodiment, described network direct broadcasting system can also comprise:
Database 5 is used for each key frame of described live video is set up index information, sets up the corresponding relation of index information and live video, and stores described index information.
In fact, described index can be secondary index, and wherein first order index can the files in stream media name be set to indexing key words, and second level index can the key frame sign be set to indexing key words.And the position of key frame is corresponding with play time.
Based on this, described streaming media server 1 can also comprise:
Retrieval module 16 is used for reading index information from database 5, according to the position of described index information retrieval key frame in live video.
A kind of application scenarios is: in the live process, client 2 has been missed and has been begun live time point, but certain time point from live process sends live request, the files in stream media name and the current time that have comprised request in this request, after then streaming media server 1 is received live request, read index information by retrieval module 16 from database 5, and, search the key frame position of current point in time correspondence again according to secondary index according to the files in stream media of one-level index search request.Then, streaming media server 1 begins from this key frame position and will just give client 2 in live transmission of flow media data, and does not need whole files in stream media transmission, and client 2 also is that direct key frame since the current time correspondence receives and plays.
Another kind of application scenarios is: in the live process, client 2 has been missed live just now content, perhaps think to watch again wonderful just now, then client 2 sends the playback request of current live video to streaming media server 1, comprise the current live files in stream media name and the time point of video playback in the described playback request, the time point of described video playback is corresponding with key frame; After streaming media server 1 is received playback request, read index information from database 5, and, search the corresponding key frame position of playback duration point according to secondary index again according to the files in stream media of one-level index search request by retrieval module 16.Then, streaming media server 1 reads current just at live files in stream media from cache module, and be that this key frame position begins to give client 2 with transmission of flow media data from this files in stream media, and do not need whole files in stream media transmission, client 2 also is directly to begin to receive and play from the corresponding key frame of playback duration point.
In sum, described network direct broadcasting system adopts the stream microtomy, can begin to play live video from the random time point, has realized the accurate location of key frame, and this transfer of data that directly begins from the key frame position, reduced the transmission delay between streaming media server and the client.Therefore, streaming media server carried out lively on client can be in live process connects apace, and can carry out the direct playing and playback of any duration under the enough big situation of the buffer memory capacity of streaming media server, and realization repeating repeatedly watched.
Embodiment three:
With reference to Fig. 3, be the structure chart of the embodiment of the invention three described a kind of players.
Described player is normally operated in the client of network direct broadcasting system, and described player mainly comprises:
Live request sending module 31 is used for sending live request to server end;
Playback request sending module 32 is used for sending playback request to server end;
Video reception module 33 is used for receiving the live video of being asked from server end;
Video playback module 34 is used to play live video.
Wherein, described server end mainly refers to streaming media server.
If what player sent is live request, then video reception module 33 and 34 receptions of video playback module and broadcast is current just at live streaming media video; If what player sent is the direct playing and playback request, video reception module 33 and the video playback module 34 time streaming media video that begins from playback duration point that receives and play then.
Preferably, because server end has carried out buffer memory to live files in stream media, and buffer memory has adopted the stream microtomy, server end can directly accurately navigate to certain key frame position of files in stream media, so player can be directly begins to receive and the playing stream media video from the key frame position of the time point correspondence of request.This is the difference of described player of present embodiment and conventional player.And described player also has the direct playing and playback function of any duration, and this is the outstanding difference of described player of present embodiment and conventional player.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
More than to a kind of network direct broadcasting system and a kind of player provided by the present invention with playback function, be described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (9)
1. the network direct broadcasting system with playback function comprises streaming media server and client, it is characterized in that:
Described streaming media server comprises:
The live data receiver module is used to receive live video;
Cache module is used for the live video that buffer memory receives;
The playback request receiver module is used to receive the playback request that client sends;
Data acquisition module is used for according to described request, obtains corresponding live video from cache module;
Data transmission module, the live video that is used for being obtained sends to client;
Described client comprises:
The playback request sending module is used for sending playback request to streaming media server;
The video reception module is used for receiving the live video of being asked from streaming media server;
The video playback module is used to play live video.
2. system according to claim 1 is characterized in that, also comprises:
Live engine is used for on-the-spot generation live video, and sends to described streaming media server.
3. system according to claim 1 is characterized in that, also comprises:
Streaming Media storage cluster is used for the live video that the later stage includes is stored.
4. according to claim 1 or 3 described systems, it is characterized in that, also comprise:
Database is used for each key frame of described live video is set up index information, sets up the corresponding relation of index information and live video, and stores described index information.
5. system according to claim 4 is characterized in that, described streaming media server also comprises:
Retrieval module is used for reading index information from database, according to the position of described index information retrieval key frame in live video.
6. system according to claim 5 is characterized in that:
The time point that comprises video playback in the described playback request, the time point of described video playback is corresponding with key frame;
Then described retrieval module is according to described index information, the corresponding key frame of video playback time point of searching and asking, and trigger described data acquisition module and begin to obtain live video from this key frame position.
7. a player is used for communicating with server, it is characterized in that, comprising:
The playback request sending module is used for sending playback request to server;
The video reception module is used for receiving the live video of being asked from server;
The video playback module is used to play live video.
8. player according to claim 7 is characterized in that, also comprises:
Live request sending module is used for sending live request to server.
9. according to claim 7 or 8 described players, it is characterized in that:
Described server has been set up index information to each key frame in the live video, and has set up the corresponding relation of index information and live video;
And, comprising the time point of video playback in the described request, the time point of described video playback is corresponding with key frame;
Then described video reception module begins to receive live video from this key frame position.
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| CN2009102428126A CN101917590A (en) | 2009-12-17 | 2009-12-17 | Network live broadcasting system with playback function and player |
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| CN2009102428126A CN101917590A (en) | 2009-12-17 | 2009-12-17 | Network live broadcasting system with playback function and player |
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- 2009-12-17 CN CN2009102428126A patent/CN101917590A/en active Pending
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