CN101673298A - Video data distributed caching method in video on demand - Google Patents
Video data distributed caching method in video on demand Download PDFInfo
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Abstract
The invention discloses a video data distributed caching method in video on demand, a server side and a PC terminal respectively mount a video player server side and a PC client side, and then a player sends an instruction to a local area network server side for retrieving a video program file index table and positioning a program source when a user clicks to play a video program; if the program source is found in a local area network, the corresponding PC terminal is positioned and playing is started, if the program source is not found in the local area network, the on-line playing is carriedout, the program source is downloaded to the local, and the address of the program source is simultaneously created in the video program file index table at the server side. The method can avoid therepeated broadcast of video-on-demand files in the local area network and reduce the loads of the bandwidth of the network; the method can reduce the loads of a database in an dynamic application andincrease the access speed; the method carries out the real-time monitoring on the resources and reasonably distributes the resources; and the method can improve the video playing response speed, in particular to increasing the concurrent access speed, reducing the reading and the writing speed of a disc and improving the system performances.
Description
Technical field
The present invention relates to networking technology area, especially relate to the video data distributed caching method in the video request program.
Background technology
Be widely used in many fields along with computer networking technology and Development of Multimedia Technology make video request program, the enterprise customer and the domestic consumer of application Network Based rapidly increase, and people are also increasing the access demand of network multimedia.The principal element that influences the ordering server performance has the bandwidth constraints of the concurrency of disk, network and performance of processors etc.Bandwidth demand should be considered in the Internet service provider aspect, the bandwidth-hungry challenge that also will face.The multi-medium data transmission can reduce network bandwidth resources, deterioration transmission channel situation, reduce the processing power of equipment, a focus video frequency program is by same time period repeated downloads or broadcast in the same LAN (Local Area Network), cause network blockage, pure online playing or only cushion at remote server, also can cause broadcasting pictures to end the buffering of not stopping, reduce user's experience.And under the high speed development of hardware, LAN (Local Area Network) is not done optimization process at media stream, the data repeated downloads, each PC terminal is done things in his own way, other PC is in idle state during the running of part PC terminal high load capacity, local resource is underutilized, simultaneously, if a PC end has been downloaded many video files, but these video files may be accessedly once just to have passed into silence, and other users also can repeat these operations, face same problem, press for resource load in the LAN (Local Area Network) is done equilibrium treatment, monitor each PC loading condition automatically, add up the processing power of each PC, and arrange the connected reference request of the strong PC response of processing power automatically than the multi-user.
Summary of the invention
The present invention seeks to reduce the restriction of LAN (Local Area Network) to bandwidth by the video data distributed caching method in the video request program, the height shared resource, improve video playback effect and speed, after server end and PC terminal are installed video player server end and pc client respectively, server end is preserved the video frequency program file index table that every station terminal was play, the PC terminal is deposited the video frequency program file backup of playing, and by concordance list positioning playing source address and begin to play, concrete steps are as follows:
Step 1: when the user clicked displaying video programs, video player was to the LAN server end retrieve video program file concordance list location program source that sends instructions;
Step 2: if in LAN (Local Area Network), find program source, navigate to corresponding PC terminal and begin to play, if do not find, then to this program source of LAN (Local Area Network) external search, the address of program source is created simultaneously to local in online playing and program downloading source in the video frequency program file index table of server end.
Further optimization to technique scheme is: video frequency program when playing the customer volume of link in record this document in the server file concordance list, do not visit duration, number of clicks, video frequency program file index table is ranked according to the video clicking rate.The work of advising some data statistic analysis is put into the unified processing of server end, and client only need be fed back corresponding field data.
Further optimization to technique scheme is: when a video frequency program connected reference number of users goes beyond the limit, system automatically the video frequency program synchronization replication to other PC terminals, and the visit of certain customers is directed on this PC terminal.The number of users of visit can also allow user oneself set by client when server end was given an acquiescence.
Further optimization to technique scheme is: in the video program play process, when the PC terminal abnormal interrupts, switch at first that other have on the PC terminal of this video frequency program in the LAN (Local Area Network), the former web download address that system does not automatically switch to video file during this program among other PC continues online playing.The node that the player client storage was played to last time when video file was interrupted, the node of continuous last time begins to play when beginning once more.
Further optimization to technique scheme is: monitor each PC loading condition automatically, and the processing power of adding up each PC, and arrange the connected reference request of the strong PC response of processing power automatically than the multi-user.The number of links that the player server end comes distributing user according to configuration and the current running environment of PC.
Further optimization to technique scheme is: recommend to reduce disk read-write from the video frequency program among same PC of the synchronous program request of the user of different terminals.Synchronously in the on-demand process, it is suitable to determine which platform PC this video file is cached among according to the configuration of PC self and current running environment, and other PC holds the file of buffer memory that can be by reading this PC to carry out synchronous playing.
Further optimization to technique scheme is: be automatically moved to given place when the long-term visit capacity of video frequency program file is hanged down.Server end determines whether and will carry out shifting processing to this document that the user can carry out the setting of duration and the position of moving according to the needs of oneself in client by checking the not visit duration in the video file concordance list.
The present invention can bring following beneficial effect:
After adopting technical scheme of the present invention, the video file concordance list by the player server end reduces database loads in dynamic application, promotes network transfer speeds; Avoid video request program file repetition program request in the LAN (Local Area Network), reduce the load of the network bandwidth; Video frequency program a plurality of user captures simultaneously, when the connected reference number of users goes beyond the limit, system automatically the video frequency program synchronization replication to other PC terminals, and the visit of certain customers is directed on this PC terminal, resource is monitored in real time the reasonable distribution resource; In the video program play process, when the PC terminal abnormal interrupts, video player can be preserved the node of this broadcast, switch to that other have on the PC terminal of this video frequency program in the LAN (Local Area Network), the former web download address that system does not automatically switch to video file during this program among other PC continues online playing, and the node of continuous last time continues to play when beginning once more; Automatically monitor each PC loading condition, the processing power of adding up each PC, and arrange the connected reference request of the strong PC response of processing power automatically than the multi-user; Recommendation reduces disk read-write from the video frequency program among same PC of the synchronous program request of the user of different terminals, improves the video playback response speed, the speed of especially concurrent visit; Be automatically moved to given place when the long-term visit capacity of video frequency program file is hanged down and regularly clear up the space; This invention possesses the height extending space, can implement the reduction of network repeated and redundant flow under the prerequisite that does not increase bandwidth capacity, reaches and significantly reduces the purpose that the bandwidth cost promotes user's networking speed simultaneously.
Figure of description
Fig. 1: video file distributed caching process flow diagram in the LAN (Local Area Network).
Embodiment
Understand and enforcement the present invention for the ease of the networking technology area those of ordinary skill, the present invention is described in further detail below in conjunction with embodiment.
See accompanying drawing 1, certain 300 people's of enterprise scale, employing be the ADSL8M broadband owing to often online on-line film and other video frequency programs watched of groups of people arranged, cause company's online bandwidth anxiety, and the effect of online ugly video frequency program is worse and worse.In order to improve the online environment, introduced video distribution formula caching technology scheme in the LAN (Local Area Network) of the present invention.
The server of video player is installed on the server 1, and the configuration of server is CPU2.3G, internal memory 2G; The video player client-side program is installed on each PC terminal 2, PC terminal configuration: CPU1.6GHz, internal memory 1G; All employees of enterprise will implement resource integration by video player in download and displaying video process later on, promote user's networking speed and video playback effect.The video player server end is set up in the LAN (Local Area Network) concordance list 3 of playing video file, the field that this concordance list comprises has: the customer volume of video file storage address, link simultaneously in the video file download address, LAN (Local Area Network), do not visit duration, number of clicks, video frequency program file index table is ranked video frequency program according to the video clicking rate.Any video player PC terminal can be deposited the video frequency program file backup of playing, by the player unified management.When the user clicks displaying video programs 4, video player PC terminal is to the LAN server end retrieve video program file concordance list location program source 5 that sends instructions, if in LAN (Local Area Network), find program source 6, navigate to corresponding PC terminal and begin to play 7, if do not find, then to this program source of LAN (Local Area Network) external search, the address 10 of program source is created simultaneously to this locality 9 in online playing 8 and program downloading source in the video frequency program file index table of server end.The video player client need feed back to concordance list local video file simultaneously by the customer volume of program request, the video player server end is monitored each PC loading condition automatically by the customer volume that links simultaneously in the traversal concordance list, the PC that processing power is strong arranges than multi-user's links and accesses.When a video file is visited simultaneously by the user more than 2 or 2 11, recommend the synchronous program request 12 of user, reduce disk read-write.Video file is in playing process during aborted 13, at first switch to other PC 6 in the LAN (Local Area Network), the web download address that system automatically switches to video file when not having among other PC continue to be play 8 and is downloaded to local 9 and append an index table information 10 simultaneously.
The number of users that limits the connected reference at most simultaneously of a video file when video player PC terminal is 10 people, and at this moment a video frequency program connected reference number of users surpasses 10 people, and system arrives other PC terminals to the video frequency program synchronization replication automatically.Do not visit the time that duration represents how long this video is not broadcast, server end determines whether this document to be moved to appointed positions according to this parameter and handles.
Claims (7)
1, the video data distributed caching method in a kind of video request program, after server end and PC terminal are installed video player server end and pc client respectively, server end is preserved the video frequency program file index table that every station terminal was play, the PC terminal is deposited the video frequency program file backup of playing, by concordance list positioning playing source address and begin to play, concrete steps are as follows:
Step 1: when the user clicked displaying video programs, player was to the LAN server end retrieve video program file concordance list location program source that sends instructions;
Step 2: if in LAN (Local Area Network), find program source, navigate to corresponding PC terminal and begin to play, if do not find, then to this program source of LAN (Local Area Network) external search, the address of program source is created simultaneously to local in online playing and program downloading source in the video frequency program file index table of server end.
2, the video data distributed caching method in the video request program according to claim 1, it is characterized in that, video frequency program when playing the customer volume of link in record this document in the server file concordance list, do not visit duration, number of clicks, video frequency program file index table is ranked according to the video clicking rate.
3, the video data distributed caching method in the video request program according to claim 1, it is characterized in that, when a video frequency program connected reference number of users goes beyond the limit, system arrives other PC terminals to the video frequency program synchronization replication automatically, and the visit of certain customers is directed on this PC terminal.
4, the video data distributed caching method in the video request program according to claim 1, it is characterized in that, in the video program play process, when the PC terminal abnormal interrupts, switch at first that other have on the PC terminal of this video frequency program in the LAN (Local Area Network), the former web download address that system does not automatically switch to video file during this program among other PC continues online playing.
5, the video data distributed caching method in the video request program according to claim 1, it is characterized in that, automatically monitor each PC loading condition, the processing power of adding up each PC, and arrange the connected reference request of the strong PC response of processing power automatically than the multi-user.
6, the video data distributed caching method in the video request program according to claim 1 is characterized in that, recommends to reduce disk read-write from the video frequency program among same PC of the synchronous program request of the user of different terminals.
7, the video data distributed caching method in the video request program according to claim 1 is characterized in that, is automatically moved to given place when the long-term visit capacity of video frequency program file is hanged down.
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Application publication date: 20100317 |