CN102143387A - Method and system for processing media data and streaming media server - Google Patents

Abstract

The present invention provides a media data processing method and system, and a streaming media server. The method includes: receiving a description request message containing live channel information sent by a mobile terminal; and confirming that the channel corresponding to the live channel information is allowed to perform live broadcast according to the live channel information Look back, then return the session description protocol information containing the relative time play range to the mobile terminal; receive the operation request sent by the mobile terminal according to the session description protocol information containing the relative time play range; operate the media data corresponding to the operation request. The mobile terminal in the embodiment of the present invention can request to obtain the media data before the live broadcast time point according to the above SDP information, so that even if the user of the mobile terminal misses the TV program before the live broadcast time point, he can still watch it according to the streaming media server preset The strategy is to watch part or all of the programs before the live broadcast time point, which improves the continuity and operability of the mobile terminal to obtain media data.

Description

Media data processing method and system, streaming media server

technical field

The embodiments of the present invention relate to the technical field of communications, and in particular, to a media data processing method and system, and a streaming media server.

Background technique

With the continuous improvement of network infrastructure, mobile streaming media services are gradually promoted and popularized, and mobile terminals can broadcast various media data to users. After receiving the streaming media service request from the mobile terminal, the streaming media server sends the played media data to the mobile terminal with the corresponding time as the start time, so that the mobile terminal can play the acquired media data.

In the process of realizing the present invention, the inventor found that there are at least the following problems in the prior art: the streaming media server in the above prior art can only start from the moment (live broadcast time point) that currently receives the streaming media service request of the mobile terminal Send the played media data to the user terminal at the time point, and cannot start sending the played media data to the user terminal at any time point before the above live broadcast time point, so that the mobile terminal cannot obtain the media before the live broadcast time point Once the user of the mobile terminal misses the TV program before the live broadcast time point, he will not be able to watch it, thereby reducing the continuity of the mobile terminal's acquisition of media data and the user's viewing experience.

Contents of the invention

Embodiments of the present invention provide a media data processing method and system, and a streaming media server, which are used to solve the problem in the prior art that the streaming media server cannot send media data before the live broadcasting time point to the mobile terminal performing the live broadcasting service. Once the user of the terminal misses the TV program before the live broadcast time point, he will not be able to watch the defect, which improves the continuity of the mobile terminal to obtain media data.

An embodiment of the present invention provides a method for processing media data, including:

receiving a description request message including live channel information sent by the mobile terminal;

If according to the live channel information, it is confirmed that the channel corresponding to the live channel information allows live review, then return the session description protocol information including the relative time play range to the mobile terminal;

receiving the operation request sent by the mobile terminal according to the session description protocol information including the relative time playing range;

An operation is performed on the media data corresponding to the operation request.

The embodiment of the present invention also provides a streaming media server, including:

The first receiving module is configured to receive a description request message containing live channel information sent by the mobile terminal;

The return module is used to return the session description protocol information including the relative time playing range to the mobile terminal if it is confirmed that the channel corresponding to the live channel information is allowed to perform live review according to the live channel information;

The second receiving module is configured to receive the operation request sent by the mobile terminal according to the session description protocol information including the relative time playing range;

An operation module, configured to operate the media data corresponding to the operation request.

The embodiment of the present invention further provides a media data processing system, including a streaming media server, the streaming media server is connected to the mobile terminal in a communicable manner,

The streaming media server is configured to receive a description request message containing live channel information sent by the mobile terminal, and if it is confirmed according to the live channel information that the channel corresponding to the live channel information is allowed to perform live review, then send a message to the The mobile terminal returns the SDP information including the relative time playing range, receives the operation request sent by the mobile terminal according to the SDP information including the relative time playing range, and operates the media data corresponding to the operation request.

It can be seen from the above technical solution that in the embodiment of the present invention, when the mobile terminal performs live streaming services, the streaming media server returns SDP information including the relative time playback range to the mobile terminal, so that the mobile terminal can request the live broadcast time point according to the above SDP information The previous media data enables mobile terminal users to watch part or all of the programs before the live broadcast time according to the preset playback strategy of the streaming media server even if they miss the TV programs before the live broadcast time, which improves the acquisition of mobile terminals. Continuity and operability of media data.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic flowchart of a method for processing media data provided by Embodiment 1 of the present invention;

FIG. 2 is a schematic flowchart of a method for processing media data provided by Embodiment 2 of the present invention;

FIG. 3 is a schematic structural diagram of a streaming media server provided by Embodiment 3 of the present invention;

FIG. 4 is a schematic structural diagram of a streaming media server provided in Embodiment 4 of the present invention;

FIG. 5 is a schematic structural diagram of a media data processing system provided by Embodiment 5 of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

FIG. 1 is a schematic flowchart of a method for processing media data provided by Embodiment 1 of the present invention. As shown in FIG. 1 , the method for processing media data in this embodiment may include the following steps:

Step 101, the stream media server receives the description (DESCRIBE) request message that comprises the live channel information sent by the mobile terminal;

The mobile terminal may be a mobile phone, a personal digital assistant (Personal Digital Assistant, PDA for short), a notebook computer, a netbook (Netbook), a digital photo frame (Digital Photo Frame, DPF for short) and other mobile devices.

Step 102, if the above-mentioned streaming media server confirms that the channel corresponding to the above-mentioned live channel information allows live playback according to the above-mentioned live channel information, then return to the above-mentioned mobile terminal a session description protocol (Session Description Protocol, referred to as SDP) that includes a relative time play range )information;

Step 103, the above-mentioned streaming media server receives the operation request sent by the above-mentioned mobile terminal according to the above-mentioned SDP information including the relative time playing range;

It can be understood that the operation request can be sent by way of message or signaling.

In this step, the above operation request may include a request to play (PLAY) or a request to pause (PAUSE). Or the operation request can also include: requesting forward positioning (forward playback) operation, requesting backward positioning (backward playback) operation

Step 104, the streaming media server operates on the media data corresponding to the operation request.

The above-mentioned operations performed by the streaming media server on the media data may include operations such as play operation, pause operation, pause and replay operation, forward positioning (forward playing) operation, backward positioning (backward playing) operation, and the like.

Further, the operation request in step 103 above may further include a relative time range of the requested operation, so as to clearly request media data within a specific time range for the operation. Correspondingly, in the above-mentioned step 104, the streaming media server may further determine the operational The absolute time range of , and operate on the media data within the above-mentioned operable absolute time range.

In this embodiment, when the mobile terminal performs the live streaming service, the streaming server can return SDP information including the relative time playing range to the mobile terminal, so that the mobile terminal can request to obtain the media data before the live broadcast time point according to the above SDP information, Even if the user of the mobile terminal misses the TV program before the live broadcast time point, he can still watch some or all of the programs before the live broadcast time point according to the playback strategy preset by the streaming media server, which improves the continuity of the mobile terminal to obtain media data and operability.

FIG. 2 is a schematic flowchart of a method for processing media data provided in Embodiment 2 of the present invention. As shown in FIG. 2 , the method for processing media data in this embodiment may include the following steps:

Step 201, the mobile terminal establishes a signaling connection with the streaming media server;

Step 202, the mobile terminal sends a description (DESCRIBE) request message comprising live channel information to the streaming media server;

Step 203, the streaming media server confirms that the channel corresponding to the above-mentioned live channel information allows live playback according to the above-mentioned live channel information, then constructs SDP information, and the above-mentioned SDP information includes a relative time playing range field;

For example, the relative time playing range field is expressed as a=Range:npt=0-T2, indicating that the relative time range of the streaming media server to send the played media data to the mobile terminal is 0-T2.

Step 204, the streaming media server returns a 200OK message to the mobile terminal, and the above-mentioned 200OK message includes the above-mentioned SDP information;

Step 205, mobile terminal according to the relative time playing scope field in the above-mentioned SDP information, display the functional controls relevant to playing media data, for example: play, pause or pause and play again, locate forward (play forward), locate backward (backward Play) and other functional controls;

The above-mentioned functional controls in this step can be located anywhere on the display interface.

Step 206, the mobile terminal establishes a media data transmission channel with the streaming media server;

Step 207, the mobile terminal receives the function trigger signal input by the user through the function control, and sends an operation request to the streaming media server;

For example: the mobile terminal receives the play trigger signal input by the user through the play function control, then sends a play (PLAY) message to the streaming media server, and the above play message can further include the relative time range of the request play; or

The mobile terminal receives the pause trigger signal input by the user through the pause function control, then sends a pause (PAUSE) message to the streaming media server; or

When the mobile terminal receives the forward positioning trigger signal input by the user through the forward positioning function control, it sends a forward playing (PLAY) message to the streaming media server, and the above-mentioned forward playing message can further include a relative time range for requesting forward playing; or

The mobile terminal receives the backward positioning trigger signal input by the user through the backward positioning function control, and then sends a backward playback (PLAY) message to the streaming media server. The above-mentioned backward playback message can further include a relative time range for requesting backward playback.

Step 208, the streaming media server operates on the media data corresponding to the above operation request.

In this embodiment, it can be assumed that the time point when the mobile terminal initiates the description request message is t0, the current live broadcast time point is t1, and the preset review strategy is to allow viewing of programs at T1 time before the time point when the mobile terminal initiates the description request message, The total time allowed to be played is T2, then the relative time range of the media data to be played by the mobile terminal is [0, T2], and the corresponding absolute time range of the media data to be played is [t0-T1, t0+T2- T1]. For example: it can be assumed that the time point when the mobile terminal initiates the description request message is 09:50:45 on January 07, 2010, the current live broadcast time point is t1, and the pre-set review policy is to allow the mobile terminal to initiate a description request For programs 30 minutes before the time point of the message, the total allowed playback time is 24 hours, then the relative time playback range of the media data that can be played by the mobile terminal is [0, 86400], and the corresponding absolute time of the media data to be played The range is [2010-01-07 09:20:45, 2010-01-08 09:20:45].

1. Initial playback

If the mobile terminal receives the play trigger signal input by the user through the play function control, it sends a play (PLAY) message to the streaming media server, and if the relative time range of the mobile terminal requesting playback contained in the play (PLAY) message is [a, b], then [a, b] should be a subset of [0, T2], and the absolute time range of the corresponding request operation is [t0+a-T1, t0+b-T1].

The streaming media server can request playback according to the relative time range [a, b] contained in the above play (PLAY) message, the time point t0 when the mobile terminal initiates the description request message, the current live broadcast time point t1, and the preset look-back strategy T1, determine the absolute playable time range, and start sending the media data within the above playable absolute time range to the mobile terminal:

If t1>t0+b-T1, the absolute playable time range is [t0+a-T1, t0+b-T1], and the corresponding playable relative time range returned by the streaming media server through the 200OK message is [a, b], that is, the field Range:npt=a-b is carried in the 200OK message, and the streaming media server sends the non-live media data within the above-mentioned playable absolute time range to the mobile terminal according to the above-mentioned playable absolute time range;

If t0+a-T1<t1≤t0+b-T1, the absolute playable time range is [t0+a-T1, t1], and the streaming media server can return the corresponding playable relative time through the 200OK message The range is [a, t1-t0+T1], that is, the field Range:npt=a-(t1-t0+T1) is carried in the 200OK message, and the streaming media server sends the above-mentioned playable time range to the mobile terminal according to the above-mentioned absolute playable Non-live media data within the absolute time range of playback;

If t1<t0+a-T1, the absolute playable time range is [t1, t0+T2-T1], and the corresponding playable relative time range returned by the streaming media server through the 200OK message is [t1-t0 +T1, T2], that is, the 200OK message carries the field Range: npt=(t1-t0+T1)-T2, and the streaming media server sends the above-mentioned playable absolute time range to the mobile terminal according to the above-mentioned playable absolute time range live media data.

2. Initial play to pause

If the streaming server is currently sending non-live or live media data to the mobile terminal, and now the mobile terminal receives the pause trigger signal input by the user through the pause function control again, it sends a pause (PAUSE) message to the streaming server. The streaming media server stops sending media data to the mobile terminal according to the above-mentioned pause (PAUSE) message. Furthermore, in this embodiment, the streaming media server may further record the pause time point at which the sending of media data to the mobile terminal is stopped.

3. Pause to play (pause and then play)

If the streaming media server has currently stopped sending non-live or live media data to the mobile terminal, and at this time the mobile terminal receives the playback trigger signal input by the user again by pausing the corresponding playback function control, it will send a playback (PLAY) to the streaming media server. information. The streaming media server may continue to send media data to the mobile terminal from the media data corresponding to the pause time point according to the recorded pause time point at which it stops sending media data to the mobile terminal.

4. From initial playback (non-live) to forward positioning

If the streaming media server is currently sending non-live media data to the mobile terminal, and this time the mobile terminal receives the forward positioning trigger signal input by the user through the forward positioning function control again, it will send a forward playback (PLAY) message to the streaming media server , if the relative time range that the mobile terminal requests to play contained in the forward play (PLAY) message is [a, b], then [a, b] should be a subset of [0, T2], and the corresponding request operation The absolute time range is [t0+a-T1, t0+b-T1].

The streaming media server can request forward playback relative time range [a, b] contained in the above PLAY message, the time point t0 when the mobile terminal initiates the description request message, the current live broadcast time point t1, and the preset return time. Look at strategy T1, determine the absolute time range that can be played forward, and start sending the media data within the absolute time range that can be played forward to the mobile terminal:

If t1>t0+b-T1, the absolute time range that can be played forward is [t0+a-T1, t0+b-T1], and the streaming media server can return the corresponding relative time that can be played forward through the 200OK message The range is [a, b], that is, the field Range:npt=a-b is carried in the 200OK message, and the streaming media server sends the non-live media within the absolute time range that can be played forward to the mobile terminal according to the absolute time range that can be played forward data;

If t0+a-T1<t1≤t0+b-T1, the absolute time range that can be played forward is [t0+a-T1, t1], and the streaming media server can return the corresponding time that can be played forward through the 200OK message The relative time range is [a, t1-t0+T1], that is, the field Range:npt=a-(t1-t0+T1) is carried in the 200OK message, and the streaming media server sends the mobile terminal an Send non-live media data within the absolute time range that can be played forward;

If t1<t0+a-T1, the absolute time range that can be played forward is [t1, t0+T2-T1], and the relative time range that the streaming server can return through the 200OK message is [t1 -t0+T1, T2], that is, the 200OK message carries the field Range: npt=(t1-t0+T1)-T2, and the streaming media server sends the above-mentioned forward-playable content to the mobile terminal according to the above-mentioned absolute time range for forward-playable Live media data in absolute time ranges.

5. Initial playback (live broadcast) to forward positioning

If the streaming media server is currently sending live media data to the mobile terminal, and now the mobile terminal receives the forward positioning trigger signal input by the user through the forward positioning function control again, it will send forward playback (PLAY) messages to the streaming media server. The streaming media server can continue to send the above live media data to the mobile terminal.

6. Initial playback to backward positioning

If the streaming media server is currently sending non-live or live media data to the mobile terminal, and at this time the mobile terminal receives the backward positioning trigger signal input by the user through the backward positioning function control again, it will send the backward playback (PLAY ) message, if the relative time range that the mobile terminal requests to play contained in the backward play (PLAY) message is [a, b], then [a, b] should be a subset of [0, T2], and its corresponding request The absolute time range of the operation is [t0+a-T1, t0+b-T1].

The streaming media server can request backward playback according to the relative time range [a, b] contained in the above PLAY message, the time point t0 when the mobile terminal initiates the description request message, the current live broadcast time point t1, and the preset response time. Look at strategy T1, determine the absolute time range that can be played backwards, and start sending the media data within the absolute time range that can be played backwards to the mobile terminal:

If t1>t0+b-T1, the absolute time range that can be played back is [t0+a-T1, t0+b-T1], and the streaming server can return the corresponding relative time that can be played back through the 200OK message The range is [a, b], that is, the field Range:npt=a-b is carried in the 200OK message, and the streaming media server sends non-live media within the absolute time range that can be played back to the mobile terminal according to the absolute time range that can be played backwards data;

If t0+a-T1<t1≤t0+b-T1, then the absolute time range that can be played backwards is [t0+a-T1, t1], and the streaming server can return the corresponding time that can be played backwards through the 200OK message The relative time range is [a, t1-t0+T1], that is, the field Range:npt=a-(t1-t0+T1) is carried in the 200OK message, and the streaming server sends the mobile terminal an Send non-live media data within the above absolute time range that can be played backwards.

Further, in this embodiment, the streaming media server determines the absolute time range that can be operated according to the relative time range of the above-mentioned request operation, the time point when the mobile terminal initiates the description request message, the current live broadcast time point, and the preset review strategy Afterwards, a 200 OK message including an operable relative time range may be further returned to the mobile terminal to notify that the operation is successful.

In this embodiment, when the mobile terminal performs the live streaming service, the streaming server can return SDP information including the relative time playing range to the mobile terminal, so that the mobile terminal can request to obtain the media data before the live broadcast time point according to the above SDP information, Even if the user of the mobile terminal misses the TV program before the live broadcast time point, he can still watch some or all of the programs before the live broadcast time point according to the playback strategy preset by the streaming media server, which improves the continuity of the mobile terminal to obtain media data and operability.

It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are expressed as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence. Because of the present invention, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification belong to preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In the foregoing embodiments, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.

Figure 3 is a schematic structural diagram of the streaming media server provided by Embodiment 3 of the present invention, as shown in Figure 3, the streaming media server of this embodiment may include a first receiving module 31, a return module 32, a second receiving module 33 and an operating module 34. Wherein, the first receiving module 31 receives the description request message containing the live channel information sent by the mobile terminal, and if the return module 32 confirms that the channel corresponding to the above live channel information is allowed to perform live review according to the above live channel information, then send a message to the above mobile terminal Return the session description protocol information that includes the relative time playback range, the second receiving module 33 receives the operation request sent by the above-mentioned mobile terminal according to the above-mentioned session description protocol information that includes the relative time playback range, and the operation module 34 is to the media data corresponding to the above-mentioned operation request to operate.

The above-mentioned functions of the streaming media server in Embodiment 1 and Embodiment 2 of the present invention can be realized by the streaming media server provided in the embodiment of the present invention.

In this embodiment, the above-mentioned operation request that the second receiving module 33 receives can include request to play (PLAY) or request to pause (PAUSE), and the operation that operation module 34 carries out to media data can include play operation, pause operation, pause and play again Operation, forward positioning (forward playback) operation, backward positioning (backward playback) operation and other operations.

In this embodiment, when the first receiving module learns that the mobile terminal requests a streaming media live broadcast service, the returning module can return SDP information including the relative time playing range to the mobile terminal, so that the mobile terminal can request to obtain the time before the live broadcast time point according to the above SDP information. Even if mobile terminal users miss the TV programs before the live broadcast time, they can still watch some or all of the programs before the live broadcast time according to the playback strategy preset by the streaming media server, which improves the mobile terminal’s access to media Data Continuity and Actionability.

Fig. 4 is a schematic structural diagram of the streaming media server provided by Embodiment 4 of the present invention. As shown in Fig. 4, compared with the previous embodiment, the above-mentioned operation request received by the second receiving module 33 in the streaming media server of this embodiment may include the relative time range of the request operation, and correspondingly, the operation module 34 may further include the relative time range of the determination unit 41 to operate according to the above request, the time point when the above mobile terminal initiates the above description request message, the current live broadcast time point and the pre-set The set review strategy determines an operable absolute time range, and the operation unit 42 operates on the media data within the above-mentioned operable absolute time range. Specifically, the operation unit 42 may specifically send the media data within the operable absolute time range to the mobile terminal.

FIG. 5 is a schematic structural diagram of a media data processing system provided in Embodiment 5 of the present invention. As shown in FIG. 5 , the media data processing system of this embodiment may include a streaming media server 51, and the streaming media server 51 communicates Connected to the mobile terminal 52, the streaming media server 51 is used to receive the description request message containing the live channel information sent by the mobile terminal 52, if according to the live channel information, it is confirmed that the channel corresponding to the live channel information allows live playback, Then return to mobile terminal 52 the SDP information that contains the relative time play range, and receive the operation request sent by mobile terminal 52 according to the SDP information that contains the relative time play range, and perform media data corresponding to the operation request operate.

The functions of the streaming media server in the first embodiment of the present invention and the second embodiment of the present invention can be realized by the streaming media server 51 in the media data processing system provided by the embodiment of the present invention.

In this embodiment, when the mobile terminal performs live streaming services, the streaming server can return SDP information including the relative time playing range to the mobile terminal, so that the mobile terminal can request to obtain media data before the live broadcast time point according to the above SDP information, Even if the user of the mobile terminal misses the TV program before the live broadcast time point, he can still watch some or all of the programs before the live broadcast time point according to the playback strategy preset by the streaming media server, which improves the continuity of the mobile terminal to obtain media data and operability.

Those of ordinary skill in the art can understand that all or part of the steps for realizing the above-mentioned method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the It includes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (8)

1. A processing method for media data, characterized in that, comprising: receiving a description request message including live channel information sent by the mobile terminal; If according to the live channel information, it is confirmed that the channel corresponding to the live channel information allows live review, then return the session description protocol information including the relative time play range to the mobile terminal; receiving the operation request sent by the mobile terminal according to the session description protocol information including the relative time playing range; An operation is performed on the media data corresponding to the operation request. 2. The method according to claim 1, wherein the operation request includes a relative time range of the requested operation, and the operation of the media data corresponding to the operation request comprises: Determine the absolute time range that can be operated according to the relative time range of the request operation, the time point when the mobile terminal initiates the description request message, the current live broadcast time point, and the preset review strategy; An operation is performed on the media data within the operable absolute time range. 3. The method according to claim 2, wherein said operating the media data within the operable absolute time range comprises: sending the media data within the operable absolute time range to the mobile terminal media data. 4. The method according to claim 1, wherein the operation request comprises a request to play or a request to pause. 5. A streaming media server, characterized in that, comprising: The first receiving module is configured to receive a description request message containing live channel information sent by the mobile terminal; The return module is used to return the session description protocol information including the relative time playing range to the mobile terminal if it is confirmed that the channel corresponding to the live channel information is allowed to perform live review according to the live channel information; The second receiving module is configured to receive the operation request sent by the mobile terminal according to the session description protocol information including the relative time playing range; An operation module, configured to operate the media data corresponding to the operation request. 6. The streaming media server according to claim 5, wherein the operation request includes a relative time frame for requesting an operation, and the operation module includes: A determining unit, configured to determine an operable absolute time range according to the relative time range of the request operation, the time point when the mobile terminal initiates the description request message, the current live broadcast time point, and the preset look-back strategy; An operating unit, configured to operate the media data within the operable absolute time range. 7. The streaming media server according to claim 6, wherein the operating unit is specifically configured to send the media data within the operable absolute time range to the mobile terminal. 8. A processing system for media data, characterized in that it comprises a streaming media server, and the streaming media server is connected with a mobile terminal in a communicable manner, The streaming media server is configured to receive a description request message containing live channel information sent by the mobile terminal, and if it is confirmed according to the live channel information that the channel corresponding to the live channel information is allowed to perform live review, then send a message to the The mobile terminal returns the SDP information including the relative time playing range, receives the operation request sent by the mobile terminal according to the SDP information including the relative time playing range, and operates the media data corresponding to the operation request.

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