CN102378043A - Content delivery method and Internet television (TV) playing method as well as corresponding device and systems - Google Patents
Content delivery method and Internet television (TV) playing method as well as corresponding device and systems Download PDFInfo
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Abstract
The embodiment of the invention discloses a content delivery method, an Internet television (TV) playing method, an Internet TV front-end processing system, a client side and an Internet TV playing system. The content delivery method and the Internet TV playing method are based on a plurality of content slices formed by slicing a source playing file, wherein, the content slices are stored through transport stream (TS) corresponding to different code rates. The content delivery method comprises the following steps of: firstly detecting the carrying capacity of the current network; and then sending the TS which corresponds to the code rates and is matched with the carrying capacity of the current network as well as an index containing a pointer pointing to the TS to the client side for playback. Therefore, in the embodiment of the invention, the playing smoothness of a media file does not need to be ensured by a frame dropping mode in the case of worse carrying capacity of the network, which prevents the phenomena generated at the client side such as picture pause, asynchronous audio and video, mosaic images and the like caused by serious frame loss, fundamentally ensures the playing smoothness of the media file at the client side, and improves the viewing experiences of a viewer.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of content delivery method, internet television player method, internet television front-end processing system, client and internet television Play System.
Background technology
IPTV (IPTV) is a kind of broadband cabled television network that utilizes, and integrates multiple technologies such as the Internet, multimedia, communication, and the brand-new technology of the multiple interactive services that comprises DTV is provided to the domestic consumer.IPTV can adapt to the trend of current network develop rapidly well, fully effectively utilizes Internet resources.Subsystems such as the IPTV system comprises mainly that streaming media service, program are gathered and edited, storage and authentication and accounting; The content that main storage and IP based network transmit is to be the files in stream media of coding core with MPEG-4; Usually the content distribution service node to be set on the edge of; And dispose corresponding streaming media service and memory device, and user side generally adopts IP STB and TV or computer as client.
Client is when carrying out the broadcast of media file; Under the stable and enough situation of client link bandwidth; The Media Stream of cbr (constant bit rate) will send to client swimmingly from network side, and the client link bandwidth is usually owing to concurrent network task changes at that time, for guaranteeing client smooth and easy to playback of media files; Media Stream adopts the form of frame losing to send on link usually, thereby guarantees the smooth and easy of playback of media files with the reduction of definition.But, when frame losing reaches some, can cause picture to pause, audio frequency and video are asynchronous, phenomenon such as mosaic occurs, badly influence beholder's the impression of watching.
Summary of the invention
Embodiment of the invention technical problem to be solved is; A kind of content delivery method, internet television player method, internet television front-end processing system, client and internet television Play System are provided; Picture fluency when guaranteeing playback of media files improves beholder's the impression of watching.
In order to solve the problems of the technologies described above, the embodiment of the invention has proposed a kind of content delivery method, and this method is based on some content sections that the section of broadcast source file is formed, and said content section is stored with the corresponding MPTS of different code checks, and said method comprises:
Detect the current network bearing capacity;
Will with the corresponding MPTS of code check of said current network bearing capacity coupling, and the index that contains the pointer that points to said MPTS sends to client and plays.
Correspondingly, the embodiment of the invention also provides a kind of internet television player method, and this method is based on some content sections that the section of broadcast source file is formed, and said content section is stored with the corresponding MPTS of different code checks, comprising:
Obtain to carry the television content playing request of content identification information and client identity information from client;
According to said client identity information said client is carried out authentication, after this authentication is passed through,
Confirm destination server according to said content identification information;
Between said destination server and said client, create session;
Said destination server based on said session will with the corresponding MPTS of code check that detects gained current network bearing capacity coupling, and the index that contains the pointer that points to said MPTS sends to said client and plays.
Correspondingly, the embodiment of the invention also provides a kind of internet television front-end processing system, and it constitutes cluster by some server cascades, and said server comprises:
Memory cell is used for memory contents section corresponding MPTS under different code checks, and the index that contains the pointer that points to said MPTS, and said content section is the broadcast source file to be cut into slices form;
First detecting unit is used to detect the current network bearing capacity, and MPTS that will be corresponding with the code check of said current network bearing capacity coupling and said index send to client and play.
Correspondingly; The embodiment of the invention also provides a kind of client; The MPTS of this client and a server interaction, the meaningful section of said server stores correspondence under different code checks, and the index that contains the pointer that points to said MPTS; Said content section is for section forms to the broadcast source file, and said client comprises:
Second detecting unit is used to detect the current network bearing capacity;
Trigger element, being used to trigger said server will send with the corresponding MPTS and the said index of code check of said current network bearing capacity coupling;
Receiving element is used to receive said MPTS and index;
Broadcast unit is used for based on said index the MPTS that is obtained being play.
Correspondingly, the embodiment of the invention also provides a kind of internet television Play System, comprising:
Client;
The internet television front-end processing system that constitutes by some server cascades; The MPTS of the meaningful section of said server stores correspondence under different code checks; And the index that contains the pointer that points to said MPTS, said content section is for section forms to the broadcast source file;
The multi-service convergence platform; Be used for carrying the television content playing request of content identification information and client identity information from said client acquisition; And said client is carried out authentication according to said client identity information; After this authentication is passed through, from said internet television front-end processing system, confirm destination server according to said content identification information, and between said destination server and said client, create session;
Wherein, said destination server based on said session will with the corresponding MPTS of code check that detects gained current network bearing capacity coupling, and the index that contains the pointer that points to said MPTS sends to said client and plays.
The embodiment of the invention is through providing a kind of content delivery method, internet television player method, internet television front-end processing system, client and internet television Play System; It is based on some content sections that the section of broadcast source file is formed, and said content section is stored with the corresponding MPTS of different code checks, at first detects the current network bearing capacity; Secondly will with the corresponding MPTS of code check of said current network bearing capacity coupling; And the index that contains the pointer that points to said MPTS sends to client and plays, like this, and can be according to the current network bearing capacity; The MPTS that the code check that matches to client transmissions is corresponding; Promptly when the current network bearing capacity was strong, to the corresponding MPTS of the high code check of client transmissions, vice versa.Thereby; Need not that the mode with frame losing guarantees the smooth and easy of playback of media files when network carrying ability is relatively poor; Thereby guaranteed that client can not produce that picture pauses, audio frequency and video are asynchronous because frame losing is serious, phenomenon such as mosaic occur; Fundamentally guaranteed the play smooth property of client, improved beholder's the impression of watching media file.
Description of drawings
Fig. 1 is the main flow chart of the internet television programme televised live method for implanting of the embodiment of the invention.
Fig. 2 is the sketch map of index in the internet television programme televised live method for implanting of the embodiment of the invention.
Fig. 3 is the main flow chart of the internet television live broadcasting method of the embodiment of the invention.
Fig. 4 is the main flow chart of the internet television request program method for implanting of the embodiment of the invention.
Fig. 5 is the primary structure figure of the internet television Play System of first embodiment of the invention.
Fig. 6 is the primary structure figure of the internet television Play System of second embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of the invention is elaborated.
As the basis of internet television live broadcasting method, the main flow chart of the internet television programme televised live method for implanting of the embodiment of the invention shown in Figure 1, it is based on a kind of internet television Play System; The internet television front-end processing system that this system mainly comprises the live information source that is provided with real-time encoder, is made up of some server cascades; And the multi-service convergence platform (Multiple Service Convergence Platform, MSCP), wherein; The internet television front-end processing system comprises central server and subordinate's server; MSCP comprise Content Management System (Content Manage System, CMS) and Short Message Entity (Short Messaging Entity SME) is used for authentication; And comprise packing device, dispatch service, centralized storage and door (Portal) etc. in the central server; Can be deployed in different regions level such as regional center or sub-district between subordinate's server and form cascade connection, comprise subordinate's storage etc. in subordinate's server, mainly comprise:
101, CMS receives the real-time stream information of real-time encoder output, this real-time stream information carry Internet Protocol (Internet Protocol, IP) and port information such as (Port);
102, CMS is according to recording task, and the notice dispatch service is obtained real-time audio and video stream (being that broadcast source file or matchmaker support file), and responds the notice of CMS by dispatch service;
103, real-time encoder output multichannel code stream is injected into dispatch service;
104, the section of dispatch service notice packing device;
105, packing device is cut into slices and encrypted work to real-time audio and video stream, obtains the content section; And each content section is stored as MPTS corresponding under the different code checks, forms the index that contains the pointer that points to MPTS simultaneously, particularly; Real-time audio and video stream can be the MPEG-2 files in stream media, and packing device mainly is that the MPEG-2 files in stream media is divided into a series of continuous MPTSs, and each MPTS is all stored with different code checks; Various code rate such as SD 400K, 800K, 1200K or high definition 800K, 1200K, 1600K for example, meanwhile, in order to follow the tracks of the availability and the current location of real-time audio and video stream in the playing process; Also need create an index that contains the pointer that points to these MPTSs, and index can be regarded as the playlist sliding window in continuous media stream, when generating a new MPTS; The content of this index also is updated; (Uniform Resource Identifier URI) joins the end of sliding window to new file consolidation URLs, and old file URI then is removed; Like this, comprise a up-to-date fixed qty x segmentation in the index all the time;
(Digital Rights Management, DRM) encipherment scheme, its AES can adopt Advanced Encryption Standard (Advanced Encryption Standrad and file encryption adopts digital copyright protecting; AES) algorithm, 128 of key lengths, cryptographic block chain (Cipher Block Chaining; CBC) pattern, initialization vector are 0, when encrypting H.264 code stream; The Slice data of encrypted image, other are not encrypted like sequential parameter, image parameter etc., also intermediary's data transfer rate of encrypted image (Instantaneous Decoder Refresh not; IDR) frame is only encrypted P frame and B frame, when the Slice data length is not 128 a integral multiple; Last piece is not encrypted not do to fill less than 128 data yet and is handled, and in order to guarantee safety, directly encrypting H.264, the key of the Slice data of code stream (is encrypted word Cipher Word; CW) require interior the replacing once 5-10 second, (Cipher Entity Key CEK) encrypts the back and H.264 encrypts in the code stream together with encrypting the descriptor insertion CW by content key; The encryption flow of XMS can be summarized as follows: the first step begins an encrypted bit stream session (it is a plurality of to walk abreast); In second step, produce this encrypted word CW at random; In the 3rd step, obtain this and encrypt descriptor; In the 4th step, insert and include DRM network abstract layer (Network Abstraction Layer, the NAL) unit of encrypting descriptor; In the 5th step, repeat to encrypt (AES-128-CBC) P frame and B frame Slice data, up to overtime time second step of encryption period with CW; Need to prove that for programme televised live, the CEK of the same channel of different code streams rate is identical;
106, packing device is with MPTS and index packing and inject dispatch service;
107; Dispatch service is injected centralized storage and subordinate's storage to the bag of MPTS and index according to scheduling strategy; Thereby in the cluster of central server and subordinate's server formation, distribute programme televised live, particularly, the MPTS of different code checks is sent in centralized storage and the subordinate's storage and stores; Index is sent to equally in centralized storage and the subordinate's storage and stores; Particularly, dispatch service is cached to program (promptly comprising MPTS and index) in centralized storage and the subordinate's storage according to the scheduling strategy of the cold and hot degree of program;
108, dispatch service notice CMS distribution is accomplished, and by the notice of CMS response scheduling service;
109, after inject accomplishing, dispatch service notice CMS injects the result, and by the notice of CMS response scheduling service;
110, CMS is to Portal and SME synchronizing metadata, and the tag content state.
Fig. 3 shows the internet television live broadcasting method (wherein the content delivery method to the embodiment of the invention also is illustrated simultaneously) of the embodiment of the invention; It is based on a kind of internet television Play System; The internet television front-end processing system that this system mainly comprises client, is made up of some server cascades, and MSCP, wherein; The internet television front-end processing system comprises fusion program gateway (Integrated Programs Gateway; IPG), the IPG program expresses (IPG View), central server and subordinate's server, MSCP comprise IPG kernel IPG Core, SME and comprehensive access gate (Integrated Access Gateway, IAG); And comprise dispatch service and centralized storage etc. in the central server; Can be deployed in different regions level such as regional center or sub-district between subordinate's server and form cascade connection, comprise subordinate's storage etc. in subordinate's server, it mainly comprises:
301, client is sent the television content playing request to IPG View and is play real-time audio and video stream with request, and this television content playing request carries content identification information (Content ID) and client identity information;
302, IPG View transmits the television content playing request to IPG Core;
303, IPG Core asks authentication to SME;
304, SME carries out authentication according to client identity information to client, and returns authenticating result to IPG Core;
305, after authentication was passed through, IPG Core transmitted the television content playing request to IAG;
306, IAG produces stream media protocol according to Content ID and plays string, and this stream media protocol is play string and carried broadcast address; Broadcast address is according to the different corresponding different broadcast address of stream media protocol; For example, when stream media protocol be that (Hypertext Transfer Protocol is in the time of HTTP) for HTTP; Broadcast address can be HTTP URL (Uniform Resource Locator; URL) address, and when stream media protocol be real time streaming transport protocol (Real Time Streaming Protocol, RTSP) or routing table maintenance protocol (Routing Table Maintenance Protocol; RTMP) time, broadcast address is also corresponding different;
307, IAG will return stream media protocol to IPG View and play string;
308, IPG View plays string with stream media protocol and is transmitted to client;
309, client is initiated the stream media protocol playing request based on broadcast address to IAG;
310; IAG is according to the stream media protocol playing request; Distribute the corresponding initial server address of broadcast address to client; This initial server address is corresponding to a preassigned server from some servers of internet television front-end processing system, and it can be a central server, also can be subordinate's server;
311, dispatch service obtains to carry the linking request of initial server address from client;
312, dispatch service is to the legitimacy of SME inquiry linking request;
313, SME returns result of determination to dispatch service after linking request is carried out validity decision;
314; After judgement is passed through; Dispatch service is confirmed destination server according to scheduling strategy from alternative each server of internet television front-end processing system, promptly confirm by some servers in the internet television front-end processing system to be that client provides the content Push Service;
315, destination server is to IAG report request record;
316, IAG creates session between destination server and client;
317; Destination server is dialogue-based to carry out the content propelling movement to client; Specifically be with the corresponding MPTS of code check that detects gained current network bearing capacity coupling; And the index that contains the pointer that points to MPTS sends to client and plays, and particularly, following two kinds of execution modes can be arranged:
First; Detect the current network bearing capacity by client; And trigger destination server and will send to client with the corresponding MPTS and the index of code check of current network bearing capacity coupling, and the current network bearing capacity can comprise in client access link bandwidth, the load of client central processing unit etc. one or more combination;
Second; Detect the current network bearing capacity by destination server; And send to client from the corresponding MPTS and the index of code check of chief commander and current network bearing capacity coupling, and the current network bearing capacity comprises in the load, client access link bandwidth, network congestion situation of server (central server or subordinate's server) etc. one or more combination;
318, destination server record service recorder;
319, destination server is to the synchronous service recorder of SME;
320, client is carried out the broadcast of programme televised live according to MPTS and index.
In the above-mentioned steps, 310-314 has accomplished the flow process of from the set of alternative services device, confirming destination server according to the stream media protocol playing request, and 306-314 has accomplished the flow process of confirming destination server according to Content ID.
Basis as the internet television order method; The main flow chart of the internet television request program method for implanting of the embodiment of the invention shown in Figure 4, it is still based on a kind of internet television Play System, and this system mainly comprises and is provided with media resource system or content aggregation platform (Content Integrated Platform; CIP) program request information source, the internet television front-end processing system that constitutes by some server cascades; And the multi-service convergence platform (Multiple Service Convergence Platform, MSCP), wherein; The internet television front-end processing system comprises central server and subordinate's server; MSCP comprises CMS and SME, and comprises packing device, dispatch service, centralized storage and Portal etc. in the central server, can be deployed in different regions level such as regional center or sub-district between subordinate's server and forms cascade connection; Comprise subordinate's storage etc. in subordinate's server, mainly comprise:
401, CMS receives the content of media resource system or CIP transmission and injects request;
402, after CMS receives the content request of injecting, the asset-ID of this content is carried out the uniqueness inspection, if inspection is passed through, then accept content and inject request, and create Content ID;
403, CMS injects the result of request to media resource system or CIP returned content;
404, CMS notice dispatch service is obtained off-line coding audio/video flow (being that broadcast source file or matchmaker support file), and responds the notice of CMS by dispatch service;
405, dispatch service obtains off-line coding audio/video flow from media resource system or CIP;
406, the section of dispatch service notice packing device;
407, packing device is cut into slices and encrypted work to off-line coding audio/video flow, obtains the content section; And each content section is stored as MPTS corresponding under the different code checks, forms the index that contains the pointer that points to MPTS simultaneously, particularly; Off-line coding audio/video flow can be the MPEG-2 files in stream media, and packing device mainly is that the MPEG-2 files in stream media is divided into a series of continuous MPTSs, and each MPTS is all stored with different code checks; Various code rate such as SD 400K, 800K, 1200K or high definition 800K, 1200K, 1600K for example, meanwhile, in order to follow the tracks of the availability and the current location of real-time audio and video stream in the playing process; Also need create an index that contains the pointer that points to these MPTSs; When generating a new MPTS, the content of this index also is updated, and new file URI joins the end of index; This index is a static file that does not upgrade in time, wherein comprises the URI tabulation of all the elements section from the beginning to the end of a program;
And file encryption adopts the DRM encipherment scheme, and its AES can adopt aes algorithm, and is specifically the same; Need to prove that for request program, the CEK of the same program of different code checks is identical;
408, packing device is with MPTS and index packing and inject dispatch service;
409; Dispatch service is injected centralized storage and subordinate's storage to the bag of MPTS and index according to scheduling strategy; Thereby in the cluster of central server and subordinate's server formation, distribute request program, particularly, the MPTS of different code checks is sent in centralized storage and the subordinate's storage and stores; Index is sent to equally in centralized storage and the subordinate's storage and stores; Particularly, dispatch service is cached to program (promptly comprising MPTS and index) in centralized storage and the subordinate's storage according to the scheduling strategy of the cold and hot degree of program;
410, dispatch service notice CMS distribution is accomplished, and by the notice of CMS response scheduling service;
411, after injection was accomplished, CMS notice media resource system or CIP injected the result, and responded the notice of CMS by media resource system or CIP;
412, CMS is to Portal and SME synchronizing metadata, and the tag content state.
And the internet television live broadcasting method of the internet television order method of the embodiment of the invention and the embodiment of the invention shown in Figure 3 roughly the same; Its difference is that mainly client sends the television content playing request to IPG View and play off-line coding audio/video flow with request, thereby carries out play-on-demand program.
Fig. 5 is the primary structure figure of the internet television Play System of first embodiment of the invention, and with reference to this figure, this system mainly comprises:
The internet television front-end processing system 503 that constitutes by some server 502 cascades; Server 502 stores the MPTS of content section correspondence under different code checks; And the index that contains the pointer that points to MPTS, and the content section is for section forms to the broadcast source file;
MSCP504; Be used for carrying the television content playing request of content identification information and client identity information from client 501 acquisitions; And client 501 is carried out authentication according to client identity information; After this authentication is passed through, from internet television front-end processing system 503, confirm destination server according to content identification information, and between destination server and client 501, create session;
Wherein, said destination server dialogue-based will with the corresponding MPTS of code check that detects gained current network bearing capacity coupling, and the index that contains the pointer that points to MPTS sends to client 501 and plays.
Second detecting unit 5011 is used to detect the current network bearing capacity;
Receiving element 5013 is used to receive MPTS and index;
Broadcast unit 5014 is used for based on index the MPTS that is obtained being play.
Fig. 6 is the primary structure figure of the internet television Play System of second embodiment of the invention; With reference to this figure; This system and first embodiment difference are; Do not carry out the detection of current network bearing capacity, but carry out the detection of current network bearing capacity through server 502 through client 501, particularly:
First detecting unit 5022 is used to detect the current network bearing capacity, and MPTS that will be corresponding with the code check of current network bearing capacity coupling and index send to client 501 and play.
Certainly, above-mentioned internet television Play System can be realized live or program request, and its concrete handling process can repeat no more with reference to aforementioned part here.
In addition; One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method; Be to instruct relevant hardware to accomplish through program; Described program can be stored in the computer read/write memory medium, and this program can comprise the flow process like the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Radom Access Memory, RAM) etc.
The above is an embodiment of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also are regarded as protection scope of the present invention.
Claims (10)
1. a content delivery method is characterized in that, this method is based on some content sections that the section of broadcast source file is formed, and said content section is stored with the corresponding MPTS of different code checks, and said method comprises:
Detect the current network bearing capacity;
Will with the corresponding MPTS of code check of said current network bearing capacity coupling, and the index that contains the pointer that points to said MPTS sends to client and plays.
2. an internet television player method is characterized in that, this method is based on some content sections that the section of broadcast source file is formed, and said content section is stored with the corresponding MPTS of different code checks, comprising:
Obtain to carry the television content playing request of content identification information and client identity information from client;
According to said client identity information said client is carried out authentication, after this authentication is passed through,
Confirm destination server according to said content identification information;
Between said destination server and said client, create session;
Said destination server based on said session will with the corresponding MPTS of code check that detects gained current network bearing capacity coupling, and the index that contains the pointer that points to said MPTS sends to said client and plays.
3. internet television player method as claimed in claim 2 is characterized in that, confirms that according to said content identification information the destination service implement body comprises:
Return the stream media protocol that carries broadcast address according to said content identification information to said client and play string;
Obtain stream media protocol playing request from said client based on said broadcast address initiation;
According to said stream media protocol playing request, from the set of alternative services device, confirm said destination server.
4. internet television player method as claimed in claim 3 is characterized in that, according to said stream media protocol playing request, from the set of alternative services device, confirms that said destination service implement body comprises:
According to said stream media protocol playing request, distribute the corresponding initial server address of said broadcast address to said client;
Obtain to carry the linking request of said initial server address from said client;
Said linking request is carried out validity decision, after this judgement is passed through,
According to scheduling strategy, from said set, confirm said destination server.
5. like each described internet television player method in the claim 3 to 4; It is characterized in that; It is live that said internet television player method is applied to internet television, and said broadcast source file is a real-time audio and video stream, or; Said internet television player method is applied to the internet television program request, and said broadcast source file is an off-line coding audio/video flow; Said stream media protocol is HTTP, real time streaming transport protocol or routing table maintenance protocol.
6. an internet television front-end processing system is characterized in that, it constitutes cluster by some server cascades, and said server comprises:
Memory cell is used for memory contents section corresponding MPTS under different code checks, and the index that contains the pointer that points to said MPTS, and said content section is the broadcast source file to be cut into slices form;
First detecting unit is used to detect the current network bearing capacity, and MPTS that will be corresponding with the code check of said current network bearing capacity coupling and said index send to client and play.
7. internet television front-end processing system as claimed in claim 6 is characterized in that, said current network bearing capacity comprises load, client access link bandwidth and/or the network congestion situation of said server.
8. client; It is characterized in that; The MPTS of this client and a server interaction, the meaningful section of said server stores correspondence under different code checks, and the index that contains the pointer that points to said MPTS; Said content section is for section forms to the broadcast source file, and said client comprises:
Second detecting unit is used to detect the current network bearing capacity;
Trigger element, being used to trigger said server will send with the corresponding MPTS and the said index of code check of said current network bearing capacity coupling;
Receiving element is used to receive said MPTS and index;
Broadcast unit is used for based on said index the MPTS that is obtained being play.
9. client as claimed in claim 8 is characterized in that, said current network bearing capacity comprises access link bandwidth and/or central processing unit load.
10. an internet television Play System is characterized in that, comprising:
Client;
The internet television front-end processing system that constitutes by some server cascades; The MPTS of the meaningful section of said server stores correspondence under different code checks; And the index that contains the pointer that points to said MPTS, said content section is for section forms to the broadcast source file;
The multi-service convergence platform; Be used for carrying the television content playing request of content identification information and client identity information from said client acquisition; And said client is carried out authentication according to said client identity information; After this authentication is passed through, from said internet television front-end processing system, confirm destination server according to said content identification information, and between said destination server and said client, create session;
Wherein, said destination server based on said session will with the corresponding MPTS of code check that detects gained current network bearing capacity coupling, and the index that contains the pointer that points to said MPTS sends to said client and plays.
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