CN103313093B - Carry out method and the directory system of distributed video on demand - Google Patents
Carry out method and the directory system of distributed video on demand Download PDFInfo
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Abstract
The invention provides method and the directory system carrying out distributed video on demand, wherein, the method is by video file composing document set close for content, the corresponding file identification of each file set, the method also includes: receiving the order request comprising fileinfo from client, described fileinfo comprises file identification；The service node information preserving the video file of described fileinfo instruction is fed back to client and carries out video playback；Judging in playing process can not normal play, obtain the file set corresponding with the file identification that described fileinfo comprises, selecting video file from the file set obtained, feeds back to client by the service node information preserving the video file chosen and carries out video playback.The present invention program can strengthen the robustness of distributed video on demand, improves program request quality.
Description
Technical field
The present invention relates to data transmission technology, particularly relate to carry out method and the index of distributed video on demand
System.
Background technology
In distributed video on demand scheme, the directory system of network side stores fileinfo and preserves
Corresponding relation between the service node information of the video file of this document information instruction, usually, one
The corresponding a plurality of service node information of fileinfo, shows to save on multiple service node same video file.
The existing method carrying out distributed video on demand specifically includes: directory system receives from client
Comprising the order request of fileinfo, described fileinfo comprises file identification；Described file will be preserved
The service node information of the video file of information instruction feeds back to client and carries out video playback.
Then, client is from each service node Parallel download video data asked.In downloading process,
Client can to the video data of different service node request different content fragments, thus realize downloading
The maximization of speed.
Video and audio frequency are put in one file by video file, and the player of client carries out video playback
Time, need through three phases, including video separation, video decoding and Video Rendering；First pass through and broadcast
Put the form of separator identification video file within device, be then demultiplex out the coded data of video and audio frequency,
The decoder being handed in dependent player, video data is decoded, finally by decoder with voice data
Decoded data are displayed via renderer.
In playing process, if client cannot normally receive video data, occurring can not the feelings of normal play
Condition, plays interruption, it reduces program request quality.
Summary of the invention
The invention provides a kind of method carrying out distributed video on demand, the method can strengthen distributed video
The robustness of program request, improves program request quality.
The invention provides a kind of directory system carrying out distributed video on demand, this directory system can strengthen point
The robustness of cloth video request program, improves program request quality.
A kind of method carrying out distributed video on demand, by video file composing document set close for content, often
The corresponding file identification of individual file set, the method also includes:
Receiving the order request comprising fileinfo from client, described fileinfo comprises file identification；
The service node information preserving the video file of described fileinfo instruction is fed back to client carry out
Video playback；
Playing process is judged can not normal play, obtain sensible with the files-designated that described fileinfo comprises
Corresponding file set, selecting video file from the file set obtained, the video literary composition chosen will be preserved
The service node information of part feeds back to client and carries out video playback.
A kind of directory system carrying out distributed video on demand, this directory system includes gathering grouped element, node
Information feedback unit and playing process processing unit；
Described set grouped element, for by video file composing document set close for content, each file set
Close a corresponding file identification；
Described nodal information feedback unit, for receiving the order request comprising fileinfo from client,
Fileinfo sends to described playing process processing unit, and described fileinfo comprises file identification；Also will
Preserve the service node information of video file of described fileinfo instruction to feed back to client and carry out video and broadcast
Put；
Described playing process processing unit, for judge in playing process can not normal play, from described collection
Close grouped element and obtain the file set corresponding with the file identification that described fileinfo comprises, from obtain
Selecting video file in file set, feeds back to visitor by the service node information preserving the video file chosen
Family end carries out video playback.
From such scheme it can be seen that the present invention is by video file composing document set close for content, playing
During, if it is judged that can not normal play, then from file set, obtain close video file, will
Preserve the service node information of close video file to feed back to client and carry out video playback.So, broadcasting
Judge during putting can not normal play time, client remains to get close video data, with continue
Play, thus, enhance the robustness of distributed video on demand, improve program request quality.
Accompanying drawing explanation
Fig. 1 is the method indicative flowchart that the present invention carries out distributed video on demand；
Fig. 2 is present invention process chart example when can not be normally carried out video playback；
Fig. 3 is the system architecture schematic diagram that the present invention carries out distributed video on demand.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and
Accompanying drawing, the present invention is described in more detail.
The present invention is by video file composing document set close for content, in playing process, if it is judged that not
Energy normal play, then obtain close video file from file set, will preserve close video file
Service node information feeds back to client and carries out video playback.
See Fig. 1, carry out the method indicative flowchart of distributed video on demand for the present invention, in advance, originally
Invent video file composing document set close for content, the corresponding file identification of each file set.
For the video file that file identification is identical, content may be identical, it is also possible to close.Content is close
Video file, refers to the video file that result of broadcast is identical；Described broadcasting refers to user's difference on sense organ time identical
Very little or none difference.Assume that video file 1 is close with video file 2, then by video file 1
The corresponding contents fragment of partial content fragment video file 2 replaces playing, and difference is very on sense organ for user
Little or there is no difference, to such an extent as to it is not aware of this replacement；In this case, by video file 1 and video
It is close that file 2 is defined as content.
How to determine that two video files that file identification is identical are the most close for prior art, such as, can pass through
Manually run arrangement, two video files played out, by the least for difference on staff's human eye sense organ or
Differentiated video file is not had to be defined as close video file.It is also possible that the file index of video file is entered
Row coupling, video file approximation matched is defined as close video file, and file index includes differentiating
Rate, coded system, Container Format etc.；Described coupling includes: if resolution ratio, coded system and container lattice
In formula three, at least one differs, and other file index is the most identical, it is determined that for close video file.
The movie and video programs of same file title only resolution ratio is different, and both are close video file；Such as differentiate
Rate is the English Original Editions film " stealing dream space " of 1280 × 720, former with the English that resolution ratio is 1024 × 576
Version film " steals dream space ", and file name " stealing dream space " is identical, and both are close video file, interior
Hold effect identical.Described coded format the most H.264 standard, RV40 etc..Described Container Format includes
RM variable bit rate (rmvb, RealMedia Variable Bitrate) form, mp4 (MPEG-4) lattice
Formula, Matroska video file (mkv, Matroska Video File) form, third generation collaborative project (3gp,
Third Generation Partnership Project) form, Audio Video Interleaved (avi, Audio Video
Interleaved) form etc..
The flow process of Fig. 1 comprises the following steps:
Step 101, receives the order request comprising fileinfo from client, and described fileinfo comprises
File identification.
File identification, for the essential information of one video file of instruction, such as file name, also wraps in fileinfo
Include out of Memory, such as file indexs such as resolution ratio, coded system, Container Formats.Described fileinfo can show
For digital digest or cryptographic Hash.
Step 102, feeds back to visitor by the service node information preserving the video file of described fileinfo instruction
Family end carries out video playback.
The directory system of network side store fileinfo with preserve this document information instruction video literary composition
Corresponding relation between the service node information of part, usually, a corresponding a plurality of service joint of fileinfo
Dot information, shows to save on multiple service node same video file.When needing, client is to index
System sends order request, receives the service node letter of the video file preserving the instruction of described fileinfo
Breath, is played out to corresponding each service node foradownloaded video data by service node information.Downloading process
In, client to the video data of different service node request different content fragments, thus can realize
The maximization of speed of download.
According to actual conditions, the service node information of directory system feedback is probably preserves described file letter
The nodal information of all service nodes of the video file of breath instruction, it is also possible to preserve described file letter
The nodal information of the partial service node of the video file of breath instruction.
Step 103, judge in playing process can not normal play, obtain and described fileinfo comprise
The file set that file identification is corresponding, selecting video file from the file set obtained, choosing will be preserved
The service node information of the video file taken feeds back to client and carries out video playback.
During practice, in playing process, judge whether that the method for normal play has multiple, name two kinds of sides
Formula illustrates.
Mode one:
In playing process, judge that follow-up data lacks, and follow-up data cannot preserve described file from other
The service node of the video file of information instruction obtains, it is determined that can not normal play.Specifically, can be by visitor
Family end judges, when occurring that follow-up data lacks, again sends to directory system and comprises fileinfo
Order request, described fileinfo comprises file identification, and described order request also includes asking failed service
Nodal information；Directory system is from all service nodes of the video file preserving the instruction of described fileinfo
In nodal information, reject the service node information that order request comprises, remaining service node information is fed back
Carry out video playback to client, if follow-up data still lacks, send to play to directory system and unsuccessfully ring
Should, directory system determines after receiving broadcasting failure response can not normal play.
Mode two:
In playing process, judge that speed of download cannot meet broadcasting demand, and cannot preserve from other described
The service node of the video file of fileinfo instruction obtains the follow-up data meeting speed of download, it is determined that no
Can normal play.Specifically, can be judged by client, when occurring that speed of download cannot meet broadcasting need
When asking, again sending the order request comprising fileinfo to directory system, described fileinfo comprises file
Mark, described order request also includes asking failed service node information；Directory system is described from preserving
In the nodal information of all service nodes of the video file of fileinfo instruction, reject what order request comprised
Service node information, feeds back to client by remaining service node information and carries out video playback, if downloaded
Speed still cannot meet broadcasting demand, sends to directory system and plays failure response, and directory system receives and broadcasts
Determining after putting failure response can not normal play.
The video file that if the video file that described content is close is file identification is identical, resolution ratio differs；
This step can specifically use the flow process shown in Fig. 2 to realize, and it comprises the following steps:
Step 201, determining can not normal play.
Step 202, obtains the file set corresponding with the file identification that fileinfo comprises.
Fileinfo described in this step is the fileinfo in step 101 in order request.
Whether step 203, exist, in the file set that inquiry obtains, the video file indicated with described fileinfo
The identical video file of resolution ratio, if it is present perform step 206；Otherwise, step 204 is performed.
Whether step 204, exist the video literary composition indicated more than described fileinfo in the file set that inquiry obtains
The resolution ratio of part, and the absolute value of the difference of resolution ratio is less than the video file of the first setting value, if it does,
Then perform step 206；Otherwise, step 205 is performed.
The close video file with high-resolution is indexed by this step, and described first setting value can basis
Need to arrange.
Whether step 205, exist the video literary composition indicated less than described fileinfo in the file set that inquiry obtains
The resolution ratio of part, and the absolute value of the difference of resolution ratio is less than the video file of the second setting value, if it does,
Then perform step 206；Otherwise, currently can not find effective service node, return, to client, the sound that inquiry is failed
Should.
The close video file with low resolution is indexed by this step, and described second setting value can basis
Need to arrange.
Step 206, using the video file inquired as the video file chosen, will preserve the video chosen
The service node information of file feeds back to client and carries out video playback.
According to actual conditions, the service node information of directory system feedback is probably preserves the video chosen
The nodal information of all service nodes of file, it is also possible to preserve the part clothes of the video file chosen
The nodal information of business node.
Use the present invention program, judge in playing process can not normal play time, client remains to get
Close video data, to continue to play, thus, enhance the robustness of distributed video on demand, improve
Program request quality.
Seeing Fig. 3, carry out the system architecture schematic diagram of distributed video on demand for the present invention, this system includes rope
Drawing system, client and service node, described directory system includes gathering grouped element, nodal information feedback
Unit and playing process processing unit；
Described set grouped element, for by video file composing document set close for content, each file set
Close a corresponding file identification；
Described nodal information feedback unit, for receiving the order request comprising fileinfo from client,
Fileinfo sends to described playing process processing unit, and described fileinfo comprises file identification；Also will
Preserve the service node information of video file of described fileinfo instruction to feed back to client and carry out video and broadcast
Put；
Described playing process processing unit, for judge in playing process can not normal play, from described collection
Close grouped element and obtain the file set corresponding with the file identification that described fileinfo comprises, from obtain
Selecting video file in file set, feeds back to visitor by the service node information preserving the video file chosen
Family end carries out video playback.
Directory system is the core component in distributed document download system, is responsible for maintenance all identical and near-sighted mutually
The index of frequency file；Fig. 3 has also marked the service node set preserving same video file 1, and
Preserve the service node set of close video file 2.Client represents in distributed document download system
The terminal of row program request behavior, can be by user to server and user (P2SP, peer to sever&peer) net
Network asks video request program, described client for example, PC, smart mobile phone, panel computer etc. to directory system.
Service node is the equipment of externally offer video data download service in distributed document download system, including
The various user terminals such as PC, smart mobile phone, panel computer, also include data server, as long as on this equipment
Deposit the video file that other user needs, it is possible to indexed system index arrives.It addition, according to existing
The feature of distributed document download system, client is while downloading data, it is possible to be converted into service node
Role, for other broadcasting users provide video data transmission service.
Alternatively, the video file that described content is close is: file identification is identical, resolution ratio, coded system and
At least one video file differed in Container Format three.
Alternatively, described playing process processing unit includes judgment sub-unit, for judging in playing process
Follow-up data lacks, and follow-up data cannot preserve the video file of described fileinfo instruction from other
Service node obtains, it is determined that can not normal play；Or, judge in playing process speed of download without
Method meets broadcasting demand, and cannot save from the service of other video file preserving the instruction of described fileinfo
Point obtains the follow-up data meeting speed of download, it is determined that can not normal play.
Alternatively, the video file that described content is close is the video literary composition that file identification is identical, resolution ratio differs
Part；Whether described playing process processing unit includes choosing subelement, for inquiring about in the file set of acquisition
There is the video file identical with the resolution ratio of the video file of described fileinfo instruction, if it is present
Using the video file inquired as the video file chosen；Otherwise,
Whether the file set that inquiry obtains exists the resolution of the video file indicated more than described fileinfo
Rate, and the absolute value of the difference of resolution ratio is less than the video file of the first setting value, if it is present will inquiry
The video file gone out is as the video file chosen；Otherwise,
Whether the file set that inquiry obtains exists the resolution of the video file indicated less than described fileinfo
Rate, and the absolute value of the difference of resolution ratio is less than the video file of the second setting value, if it is present will inquiry
The video file gone out is as the video file chosen.
The present invention uses the mode of extending video file source, utilizes the video file of similar contents to make more clothes
Business node participates in video request program, service ability deficiency occurs in video request program when, it is possible in being switched to
Hold close video file, thus continue the original content of smooth playing, meet the broadcasting demand of user's essence.
Thus, enhance the robustness of distributed video on demand, improve program request quality.Further, side of the present invention
Case incorporates more user resources, has saved the cost of video request program while not reducing Consumer's Experience.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Within the spirit of invention and principle, any modification, equivalent substitution and improvement etc. done, should be included in
Within the scope of protection of the invention.
Claims (6)
1. the method carrying out distributed video on demand, it is characterised in that by video file close for content
Composing document set, the corresponding file identification of each file set, wherein, the video that described content is close
File is: file identification is identical, and in resolution ratio, coded system and Container Format three, at least one differs
Video file；The method also includes:
Receiving the order request comprising fileinfo from client, described fileinfo comprises file identification；
The service node information preserving the video file of described fileinfo instruction is fed back to client carry out
Video playback；
In playing process, judge that follow-up data disappearance or speed of download cannot meet broadcasting demand, and follow-up number
According to cannot from other preserve described fileinfo instruction video file service node obtain time, obtain with
The file set that file identification that described fileinfo comprises is corresponding, chooses from the file set obtained and regards
Frequency file, feeds back to client by the service node information preserving the video file chosen and carries out video playback.
2. the method for claim 1, it is characterised in that the video file that described content is close is literary composition
The video file that part mark is identical, resolution ratio differs；
Described from obtain file set selecting video file include: inquiry file set in whether exist and institute
State the video file that the resolution ratio of the video file that fileinfo indicates is identical, if it is present will inquire
Video file as the video file chosen；Otherwise,
Whether inquiry file set exists the resolution ratio of the video file indicated more than described fileinfo, and divides
The absolute value of the difference of resolution is less than the video file of the first setting value, if it is present the video that will inquire
File is as the video file chosen；Otherwise,
Whether inquiry file set exists the resolution ratio of the video file indicated less than described fileinfo, and divides
The absolute value of the difference of resolution is less than the video file of the second setting value, if it is present the video that will inquire
File is as the video file chosen.
3. the method as according to any one of claim 1 to 2, it is characterised in that described fileinfo is
Digital digest or cryptographic Hash.
4. the directory system carrying out distributed video on demand, it is characterised in that this directory system includes collection
Close grouped element, nodal information feedback unit and playing process processing unit；
Described set grouped element, for by video file composing document set close for content, each file set
Close a corresponding file identification；Wherein, the video file that described content is close is: file identification is identical, point
At least one video file differed in resolution, coded system and Container Format three；
Described nodal information feedback unit, for receiving the order request comprising fileinfo from client,
Fileinfo sends to described playing process processing unit, and described fileinfo comprises file identification；Also will
Preserve the service node information of video file of described fileinfo instruction to feed back to client and carry out video and broadcast
Put；
Described playing process processing unit, for judging follow-up data disappearance or speed of download in playing process
Broadcasting demand cannot be met, and follow-up data cannot preserve, from other, the video literary composition that described fileinfo indicates
When the service node of part obtains, obtain the files-designated comprised with described fileinfo from described set grouped element
The file set of sensible correspondence, selecting video file from the file set obtained, regarding of choosing will be preserved
The service node information of frequency file feeds back to client and carries out video playback.
5. directory system as claimed in claim 4, it is characterised in that the video file that described content is close
The video file that, resolution ratio identical for file identification differs；Described playing process processing unit includes choosing
Whether subelement, exist, in the file set inquiring about acquisition, the video file indicated with described fileinfo
The identical video file of resolution ratio, if it is present using the video file inquired as the video chosen
File；Otherwise,
Whether the file set that inquiry obtains exists the resolution of the video file indicated more than described fileinfo
Rate, and the absolute value of the difference of resolution ratio is less than the video file of the first setting value, if it is present will inquiry
The video file gone out is as the video file chosen；Otherwise,
Whether the file set that inquiry obtains exists the resolution of the video file indicated less than described fileinfo
Rate, and the absolute value of the difference of resolution ratio is less than the video file of the second setting value, if it is present will inquiry
The video file gone out is as the video file chosen.
6. the directory system as according to any one of claim 4 to 5, it is characterised in that described file is believed
Breath is digital digest or cryptographic Hash.
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| CN105338417B (en) * | 2015-10-29 | 2018-09-04 | 北京威动科技有限公司 | file navigation playing method and device |
| CN109446074B (en) * | 2018-09-28 | 2022-04-01 | 深圳市网心科技有限公司 | Pressure testing method and device for on-demand distribution system, computer device and computer storage medium |
| CN110213662A (en) * | 2019-07-09 | 2019-09-06 | 金明晔 | A kind of VOD method, server, client and video on-demand system |
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| CN101068339A (en) * | 2007-06-01 | 2007-11-07 | 华为技术有限公司 | Method, server and user end for realizing video frequency requested program broadcasting-like services |
| CN101188736A (en) * | 2007-12-14 | 2008-05-28 | 电子科技大学 | Stream media ordering system and method with STB as the server |
| CN101459825A (en) * | 2008-12-19 | 2009-06-17 | 上海全景数字技术有限公司 | Interactive program control method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101068339A (en) * | 2007-06-01 | 2007-11-07 | 华为技术有限公司 | Method, server and user end for realizing video frequency requested program broadcasting-like services |
| CN101188736A (en) * | 2007-12-14 | 2008-05-28 | 电子科技大学 | Stream media ordering system and method with STB as the server |
| CN101459825A (en) * | 2008-12-19 | 2009-06-17 | 上海全景数字技术有限公司 | Interactive program control method |
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Effective date of registration: 20230706 Address after: 518057 Tencent Building, No. 1 High-tech Zone, Nanshan District, Shenzhen City, Guangdong Province, 35 floors Patentee after: TENCENT TECHNOLOGY (SHENZHEN) Co.,Ltd. Patentee after: TENCENT CLOUD COMPUTING (BEIJING) Co.,Ltd. Address before: 2, 518044, East 403 room, SEG science and Technology Park, Zhenxing Road, Shenzhen, Guangdong, Futian District Patentee before: TENCENT TECHNOLOGY (SHENZHEN) Co.,Ltd. |