CN102281474B - Live network broadcasting and recording method - Google Patents

Live network broadcasting and recording method Download PDF

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Publication number
CN102281474B
CN102281474B CN 201110258416 CN201110258416A CN102281474B CN 102281474 B CN102281474 B CN 102281474B CN 201110258416 CN201110258416 CN 201110258416 CN 201110258416 A CN201110258416 A CN 201110258416A CN 102281474 B CN102281474 B CN 102281474B
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cdn node
recording
node
data
p2sp
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CN102281474A (en
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李茗
邵长松
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LeTV Information Technology Beijing Co Ltd
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LeTV Information Technology Beijing Co Ltd
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Abstract

The invention provides a live network broadcasting and recording method. According to the method, after a user gives a recording instruction to a certain video file, a Flash player of a client informs p2sp.dll of starting recording through a proxy, the p2sp.dll sends a hyper text transfer protocol (HTTP) request through a content delivery network (CDN) and a peer-to-peer (p2p) network, a certain boundary CDN node or a certain p2p node which has received the HTTP request searches whether the local site has the required data, and if so, HTTP connection is established between the boundary CDN node or the p2p node; otherwise, the p2p node does not make a response, and the boundary CDN node asks upstream internal CDN nodes for the data till a certain internal CDN node finds a live broadcasting source or the required data are stored in the local site of the internal CDN node. After the CDN node receives the required data, the CDN node caches the data at the local site and transmits the data to the downstream nodes. After the client receives the required data, the p2sp.dll writes the data into a local file and transmits the data to the Flash player so as to fulfill the purpose of recording.

Description

A kind of network direct broadcasting and method for recording
Technical field
The present invention relates to a kind of network direct broadcasting and method for recording, belong to Internet video and play and record the field.
Background technology
Along with the development of science and technology, increasing Web TV (Internet Protocol Television or Interactive Personal Television, IPTV) and Digital Television (Digital Television, DTV) are moved towards the user.People can watch the TV programme of oneself liking on the net, and need not be subjected to the restriction of time.The program of liking for oneself, most people always tends to repeatedly watch, yet watch online same video all to need a large amount of buffer time at every turn, downloading to this locality also can lose time, and can not satisfy the mood that spectators watch, therefore network personal video recording (Network Personal Video Recorder, NPVR) becomes numerous netizens' first-selection.
Application number be 200610056789.8 patent disclosure a kind of internet personal video recording system and terminal thereof, this individual recording system adopts the p2p transmission mode, and video recording method is that file is downloaded.This Internet net personal video recording system speed of download when resource is bad is very slow, and the file that this system terminal request is downloaded is to cut apart good video file on the streaming media server, can not record according to the customer demand segmentation.
Application number a kind of method and system of network personal video recording that has been 200810102228.6 patent disclosure, this recording system has comprised electric program guide Single-Server, network personal video recording server, portal server, video server interface module, video server, set-top box, user terminal.The hardware requirement of this network personal video recording system is higher, and the file that this system records is whole program, can not record according to the customer demand segmentation.
Summary of the invention
The object of the invention is to propose a kind of network direct broadcasting method for recording, it can solve the problems of the technologies described above.
The method that the live telecast that the present invention proposes is recorded comprises the rendition list downloading process, HTTP asks response process, recording process successively.
Preferably, HTTP request response process adopts the Internet Transmission pattern that content distributing network (Content Delivery Network is called for short CDN) architectural framework combines with p 2 p technology.
Preferably, recording process adopts the p2sp.dll module to carry out data receiver and record.
In the rendition list downloading process, after the user starts live-mode, client can be inquired about the live television channel of all network enabled and the in the recent period programme televised live advance notice of (today, tomorrow, the day after tomorrow) of each channel from the program data storehouse, then it is downloaded to be presented on the client end interface.
Preferably, the program data storehouse operates on the independent server, is connected with client, for the client provides recent live telecast TV guide.
Preferably, client comprises Flash player, signaling parsing module proxy, p2sp.dll, and wherein proxy is the software module of the signaling that receives being carried out analytical capabilities, i.e. signaling parsing module; P2sp.dll is the functional entity of a realization p2p function logic.
HTTP request response process comprises following steps:
Step 1, client, then directly transmit if there is the required file of this client to the p2p node request msg of its connection, if there is not the required file of this client, then described client is to the border CDN node of its connection, and namely the father CDN node of this client sends the video data request; After described border CDN node receives this video data request, inquire about local cache, judge whether to exist the video data of described client-requested, then this video data transmitting is delivered to described client if exist, then do not continue step 2 if do not exist;
Step 2, described border CDN node are to connected inner CDN node, and namely his father CDN node sends the video data request, and described inner CDN node judges whether this CDN node exists the video data of described border CDN node request; Then these data are sent to described border CDN node if exist, described border CDN node is kept at this video data buffering area and is sent to described client again; If do not exist and then continue step 3;
Step 3, described inner CDN node send the video data request to live source, described live source searches whether there is this video data, then these data are sent to described inner CDN node if exist, described border CDN node is preserved and be sent to described CDN node with this video data at buffering area again, and described client is preserved and be sent to described border CDN node with this video data at buffering area again; If do not exist and then continue step 4;
Step 4: described live source server sends the video data request to streaming media server, and described streaming media server imports the video flowing of its request into by the RTMP agreement section server of described live source; Described section server is converted to a plurality of video segments with video flowing, and is stored on the web server in the live source, then video segment is sent to inner CDN node.
Preferably, the playing duration of described section is 8-15 second, deposits the total duration on the described Web server and is no more than two minutes video file, and scratch file will be deleted.
Preferably, generate and safeguard description document on the described web server, described description document is used for recording all the effective video data on the current web server, and this description document is a list structure, and content comprises blocks of files numbering, start offset, the end skew of each effective video data; The content of described description document can dynamically update, and the tabulation header elements constantly is removed, and constantly at the newly-increased element of tabulation afterbody, the video file of the unit-sized that expression section server is newly-generated.
Preferably, communicating by letter between described player and border CDN node, border CDN and inner CDN node, inner CDN node and the live source server adopted http protocol.
Described recording stage has direct craft to record, record appointed program, records the three kinds of selections of performance recording in the fixed time section.
Preferably, in direct manual method for recording, the user is after client end interface is enabled recording function, and the Flash player transmits the record instruction to signaling parsing module Proxy, signaling parsing module Proxy informs that p2sp.dll begins to record after instruction is resolved; P2sp.dll is sent to the Flash player with data and data is write in the local file after receiving the data that border CDN node or p2p node send, and reaches the purpose of recording.
Preferably, when recording appointed program, the user is after client end interface is selected to need recorded program, and the Flash player sends the record instruction and by the complete tabulation of recording of successively sorting of live time started to signaling parsing module Proxy.Record that each list element is in the tabulation:<program start time, program subordinate channel, program names 〉.Signaling parsing module Proxy and time synchronized server carry out time synchronized, for each program in the tabulation, during to its live time, signaling parsing module Proxy sends record command to p2sp.dll, informs that it opens corresponding channel, is wanted data by p2sp.dll to CDN node or p2p node, when border CDN node with data after should give p2sp.dll, p2sp.dll writes data in the local file when data are sent to the Flash player, namely reaches the purpose of recording.For recording a plurality of programs, p2sp.dll is multithreading work at this moment.
Preferably, during program in recording the fixed time section, behind the program of user within certain time period that client end interface is selected to record, the Flash player sends the record instruction and by the complete tabulation of recording of successively sorting of live time started, records to signaling parsing module Proxy.Each list element is:<time started, concluding time, subordinate channel 〉.Signaling parsing module Proxy does time synchronized with the time synchronized server first, for the tabulation in each, during to its live time started, signaling parsing module Proxy sends instruction to p2sp.dll, informs that it opens corresponding channel, is wanted data by p2sp.dll to CDN node or p2p node, when border CDN node with data after should give p2sp.dll, p2sp.dll writes data in the local file when data are sent to the Flash player, namely reaches the purpose of recording.During to its live concluding time, signaling parsing module Proxy sends the STOP instruction to p2sp.dll and stops to record of this channel.For recording a plurality of programs, p2sp.dll is multithreading work at this moment.
The present invention includes the combination in any of above-mentioned each scheme.
The present invention combines the advantage of CDN and p2p network, and the p2p network is born main transmission task resourceful the time, and CDN has born main transmission task in resource shortcoming so that the user watch online with record very smooth.Recording process of the present invention has comprised not only that synchronous recording also wraps and has expanded asynchronous recording namely no matter the user can record video not watching video, has really made things convenient for the user, has liberated the user.
Description of drawings
Fig. 1 is the schematic diagram of a preferred embodiment of implementing the live recording system framework of network direct broadcasting method for recording of the present invention
Fig. 2 is the live sequential chart of recording according to framework shown in Figure 1
Fig. 3 records the appointed program sequential chart according to framework shown in Figure 1
Fig. 4 is the program sequential chart in the fixed time section recorded according to framework shown in Figure 1.
Embodiment
In order to set forth better the present invention, illustrate in greater detail technical scheme provided by the invention below in conjunction with the diagram embodiment.
Figure 1 shows that live recording system Organization Chart.
System shown in Figure 1 comprises a streaming media server, a live source server, some clients, a plurality of CDN node, and a program data storehouse.Described CDN node is the CDN server, and described a plurality of CDN nodes are organized as inner CDN node and border CDN node, and described inner CDN node connects described live source and border CDN node; And the border CDN node that is connected with inner CDN node is as the child node of this inside CDN node; Described border CDN node connects described inner CDN node and described client, and described border CDN node is not directly accessed the live source server; The inside CDN node that is connected with border CDN node is as the father node of this border CDN node; Described playback terminal only is connected to described border CDN node, as the leaf node of connected border CDN node; So, all CDN node organizations become tree, and each CDN equipment indicates his father CDN address of node in its local profile, and the root node of whole tree is the web server in the live source.
Described client is a p2p node, connects by Internet between each client, consists of a p2p network.
Described streaming media server is connected with described live source server, and this live source server further comprises section server and Web server; Streaming media server imports video flowing in the live source server section server by the RTMP agreement.
Generate and safeguard description document on the described web server, described description document is used for recording all the effective video data on the current web server, this description document is a list structure, and content comprises blocks of files numbering, start offset, the end skew of each effective video data; The content of described description document can dynamically update, and the tabulation header elements constantly is removed, and constantly at the newly-increased element of tabulation afterbody, the video file of the unit-sized that expression section server is newly-generated.
Described client connects described border CDN node and described program data storehouse, and described client is by connecting the described program data storehouse program downloading user interface of tabulating, and makes things convenient for the user to choose to need the program of downloading.Described client connects described edge fit circle CDN node, and when the client assigned record command, described client sent request of data to described border CDN node and asks for data, and receives the data of described border CDN node transmission.
Described program data library storage the live television channel of all network enabled and the in the recent period programme televised live advance notice of (today, tomorrow, the day after tomorrow) of each channel, when described client needed program recording, client can sort the rendition list to make by the time and record tabulation.
Network direct broadcasting recording system workflow shown in Figure 1 is described below, can be with further reference to the live sequential chart of recording shown in Figure 2, and Fig. 3 records the appointed program sequential chart, and Fig. 4 is the program sequential chart of recording in the fixed time section, clearlyer understands the present invention:
The described client of Fig. 1 comprises Flash player, signaling parsing module Proxy, p2sp.dll.
Record shown in the sequential chart as Fig. 2 is live, when the user start player open live after, described Flash player can send the HTTP request to p2sp.all, then connects the CDN node via described p2sp.all or the p2p node obtains data.After the user assigns the beginning record command, described Flash player transmits the record instruction to described signaling parsing module Proxy, described signaling parsing module Proxy informs described p2sp.all after instruction is resolved, and then obtains data via described p2sp.all connection CDN node and p2p node.Described p2sp.dll saves the data in first in the local file after receiving the data that CDN node or p2p node send, and then is sent to described Flash player.Until the user assigns recording stop instruction, described Flash player sends recording stop instruction to described signaling parsing module Proxy, through sending to described p2sp.all after the instruction parsing, the data that again send via CDN node or p2p node afterwards will no longer be preserved a in this locality, directly send described Flash player to.
Record shown in the appointed program sequential chart such as Fig. 3, the user assign record the appointed program order after, described Flash player sorts desirable recording program in described the rendition list to make in chronological order first and records tabulation, then with the record instruction with describedly record tabulation and be sent to described signaling parsing module Proxy, each list element is:<program start time, the program subordinate channel, program names 〉.Described signaling parsing module Proxy does time synchronized with the time synchronized server first.When top line during the live time in tabulation, described signaling parsing module Proxy sends the record command of opening top line to described p2sp.dll, inform that described p2sp.dll opens corresponding channel, obtain the data of this channel program and preserve in this locality to CDN or p2p node by described p2sp.dll.Describedly record in the tabulation second living broadcast of programs during the time when arriving, described signaling parsing module Proxy will set up a new thread, send the record command of opening another program to described p2sp.dll, obtain the data of this channel program and preserve in this locality to CDN or p2p node by described p2sp.dll.By that analogy, until described all list items of recording in the tabulation are all recorded complete.
Shown in the program sequential chart in Fig. 4 records the fixed time section, behind the program of user within certain time period that user interface is selected to record, described Flash player sorts the desirable recording time period in described the rendition list to make by the time started order first and records tabulation, send the record instruction and by the complete tabulation of recording of successively sorting of live time started to described signaling parsing module Proxy again, each list element is:<the time started, concluding time, subordinate channel 〉.Described signaling parsing module Proxy carries out time synchronized with the time synchronized server first.Record when described that first channel begins recording time then in the tabulation, described signaling parsing module Proxy is to the record command of described p2sp.dll transmission to first channel, inform that it opens corresponding channel, described p2sp.dll obtains the data of this channel program and preserves in this locality to CDN or p2p node.To the concluding time, described signaling is resolved mould Proxy and is sent the STOP instruction to described p2sp.dll, and described p2sp.dll stops to record of described channel.Record when described that second channel begins recording time then in the tabulation, described signaling parsing module Proxy is to the record command of described p2sp.dll transmission to second channel, inform that it opens corresponding channel, described p2sp.dll obtains the data of this channel program and preserves in this locality to CDN or p2p node.To the concluding time, described signaling is resolved mould Proxy and is sent the STOP instruction to described p2sp.dll, and described p2sp.dll stops to record of this channel.By that analogy, until described all list items of recording in the tabulation are all recorded complete.

Claims (17)

1. the live telecast method for recording comprises the rendition list downloading process, HTTP request response process, recording process successively, it is characterized in that: the Internet Transmission pattern that HTTP request response process adopts the content distributing network architectural framework to combine with p 2 p technology; Recording process adopts the p2sp.dll module to carry out data receiver and record, and described p2sp.dll is the functional entity of a realization p2p function logic;
Wherein, described HTTP request response process comprises following steps:
Step 1, client, then directly transmit if there is the required file of this client to the p2p node request msg of its connection, if there is not the required file of this client, then described client is to the border CDN node of its connection, and namely the father CDN node of this client sends the video data request; After described border CDN node receives this video data request, inquire about local cache, judge whether to exist the video data of described client-requested, then this video data transmitting is delivered to described client if exist, then do not continue step 2 if do not exist;
Step 2, described border CDN node are to connected inner CDN node, and namely his father CDN node sends the video data request, and described inner CDN node judges whether this CDN node exists the video data of described border CDN node request; Then these data are sent to described border CDN node if exist, described border CDN node is kept at this video data buffering area and is sent to described client again; If do not exist and then continue step 3;
Step 3, described inner CDN node send the video data request to live source, described live source searches whether there is this video data, then these data are sent to described inner CDN node if exist, described border CDN node is preserved and be sent to described CDN node with this video data at buffering area again, and described client is preserved and be sent to described border CDN node with this video data at buffering area again; If do not exist and then continue step 4;
Step 4: described live source server sends the video data request to streaming media server, and described streaming media server imports the video flowing of its request into by the RTMP agreement section server of described live source; Described section server is converted to a plurality of video segments with video flowing, and is stored on the web server in the live source, then video segment is sent to inner CDN node.
2. method according to claim 1, it is characterized in that: described the rendition list downloading process is, after the user starts live-mode, client inquires about the live television channel of all network enabled from the program data storehouse and the recent programme televised live of each channel is predicted and made and record tabulation, then downloads it to this locality and is presented on the client end interface.
3. method according to claim 2, it is characterized in that: described program data storehouse operates on the independent server, and this program data storehouse is connected with described client, for the client provides recent live telecast TV guide.
4. according to claim 2,3 described methods, it is characterized in that: described client is a p2p node, comprise Flash player, Proxy, p2sp.dll, wherein Proxy is the software module of the signaling that receives being carried out analytical capabilities, i.e. signaling parsing module.
5. method according to claim 1, it is characterized in that: the playing duration of described section is 8-15 second, deposits on the described Web server to amount to duration and be no more than two minutes video file, scratch file will be deleted.
6. method according to claim 5, it is characterized in that: generate and safeguard description document on the described web server, described description document is used for recording all the effective video data on the current web server, this description document is a list structure, and content comprises blocks of files numbering, start offset, the end skew of each effective video data; The content of described description document can dynamically update, and the tabulation header elements constantly is removed, and constantly at the newly-increased element of tabulation afterbody, the video file of the unit-sized that expression section server is newly-generated.
7. method according to claim 4 is characterized in that: http protocol is adopted in communicating by letter between described Flash player and border CDN node, border CDN and inner CDN node, inner CDN node and the live source server.
8. method according to claim 1 is characterized in that: recording process comprises that direct craft records, records appointed program, records the three kinds of methods of performance recording in the fixed time section.
9. method according to claim 8, it is characterized in that: described recording process adopts direct manual method for recording, wherein the user is after client end interface is enabled recording function, the Flash player transmits the record instruction to signaling parsing module Proxy, signaling parsing module Proxy informs that p2sp.dll begins to record after instruction is resolved; P2sp.dll is sent to the Flash player with data and data is write in the local file after receiving the data that border CDN node or p2p node send, and reaches the purpose of recording.
10. method according to claim 8, it is characterized in that: described recording process adopts the method for recording appointed program, wherein the user is after client end interface is selected to need recorded program, the Flash player to signaling parsing module Proxy send the record instruction and by live time started sequencing ordering complete record tabulation.
11. method according to claim 10 is characterized in that: above-mentionedly record that each list element is in the tabulation:<program start time, program subordinate channel, program names 〉.
12. method according to claim 10, it is characterized in that: signaling parsing module Proxy and time synchronized server carry out time synchronized, for each program in the tabulation, during to its live time, signaling parsing module Proxy sends record command to p2sp.dll, informs that it opens corresponding channel.
13. method according to claim 12 is characterized in that: p2sp.dll asks for the data of this channel program and preserves in this locality to CDN or p2p node after receiving the record command that signaling parsing module Proxy transmits and recording tabulation; This moment, p2sp.dll was multithreading work in order to record a plurality of programs.
14. method according to claim 8, it is characterized in that: in the method for program recording in recording the fixed time section, behind the program of user within certain time period that client end interface is selected to record, the Flash player to signaling parsing module Proxy send the record instruction and by live time started sequencing ordering complete record tabulation.
15. method according to claim 14 is characterized in that: above-mentionedly record that each list element is in the tabulation:<time started, concluding time, subordinate channel 〉.
16. method according to claim 14, it is characterized in that: signaling parsing module Proxy carries out time synchronized with the time synchronized server first, for the tabulation in each, during to its live time started, signaling parsing module Proxy sends instruction to p2sp.dll, inform that it opens corresponding channel, during to its live concluding time, signaling parsing module Proxy sends the STOP instruction to p2sp.dll and stops to record of this channel.
17. method according to claim 16 is characterized in that: p2sp.dll obtains the data of this channel program and preserves in this locality to CDN or p2p node after receiving the record command that signaling parsing module Proxy transmits and recording tabulation; This moment, p2sp.dll was multithreading work in order to record a plurality of programs.
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