CN103457966A - Method, equipment and system for accessing cloud storage equipment on basis of DLNA (digital living network alliance) technology - Google Patents

Abstract

The embodiment of the present invention discloses a method, device and system for accessing cloud storage devices based on DLNA technology, which are used to enable devices based on DLNA technology to share media resources of the cloud storage device. The method includes: the cloud storage control module accesses the file information stored in the cloud storage device after receiving the request from the scanning module, and sends the obtained file information to the scanning module; the scanning module pushes new file metadata to the DMS, and the DMC performs Browse and select media files on the Internet, notify DMR to establish a connection with DMS, DMS receives the playback request sent by DMR through the connection, obtains media files from cloud storage devices through the cloud storage control module and transmits them to DMR, and DMR plays them .

Description

Method, device and system for accessing cloud storage device based on DLNA technology

technical field

The invention relates to the field of communication technology, in particular to a method for accessing a cloud storage device based on the Digital Living Network Alliance DLNA technology, a DMC and a multimedia storage and playback system.

Background technique

DLNA (Digital Living Network Alliance, Digital Living Network Alliance) is an industry specification for media mutual access in digital homes, which solves the problem of wireless and wired networks between PCs (Personal Computers, personal computers), consumer appliances, and mobile devices. interconnection.

With the continuous increase of people's demand, the storage capacity of PCs, consumer appliances, and mobile devices is gradually increasing. Now some PCs, consumer appliances, and mobile devices can already use cloud storage devices as storage tools.

Cloud storage is extended and developed on the basis of cloud computing, which can provide data storage and business access functions for terminals. Users can use web pages, network disk clients, or mobile APP (Accelerated Parallel Processing, AMD accelerated parallel processing technology) on the terminal to access the cloud storage device through the network, browse the file directory structure and file list on the cloud storage device, and Files can be uploaded to or downloaded from the cloud storage device.

The cloud storage device provides a large storage space for the terminal. However, in the current DLNA system, each terminal can only access the content stored locally, and cannot directly share the files stored on the cloud storage device.

Contents of the invention

Embodiments of the present invention provide a method for accessing cloud storage devices based on DLNA technology, a DMC, and a multimedia storage and playback system, which are used to solve the problem in the prior art that each DLNA terminal can only access local content and cannot directly share and store in cloud storage. Problems with files on the device.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

On the one hand, a method for accessing cloud storage devices based on DLNA technology is applied to multimedia storage composed of digital media server DMS, digital media player DMR, digital media controller DMC, scanning module, cloud storage control module and cloud storage device Playing system, wherein, the DMS, the DMR and the DMC are implemented based on the DLNA protocol;

The scanning module is configured to periodically send a request for scanning the storage content of the cloud storage device to the cloud storage control module, so that the cloud storage control module accesses the file information stored in the cloud storage device after receiving the request, and Sending the acquired file information to the scanning module, so that the scanning module caches the file information locally after receiving the file information;

The methods include:

The DMC browses the media files represented by file metadata on the DMS, wherein the file metadata on the DMS is obtained by pushing PUSH to the DMS when the scanning module finds that the content on the cloud storage device is updated;

The DMC selects a first media file that needs to be played;

The DMC notifies the DMR to establish a connection with the DMS, so that the DMR sends a request for playing the first media file to the DMS through the connection, and the DMS passes the The cloud storage control module acquires the first media file from the cloud storage device and transmits it to the DMR, and the DMR plays it.

On the other hand, a digital media controller DMC, the DMC, a digital media server DMS, a digital media player DMR, a scanning module, a cloud storage control module and a cloud storage device form a multimedia storage and playback system, wherein the DMS, The DMR and the DMC are implemented based on the DLNA protocol;

The scanning module is configured to periodically send a request for scanning the storage content of the cloud storage device to the cloud storage control module, and the cloud storage control module accesses the file information stored in the cloud storage device after receiving the request, and sends The acquired file information is sent to the scanning module, so that the scanning module caches the file information locally after receiving the file information;

The DMC includes:

The browsing unit is used for the DMC to browse the media files represented by file metadata on the DMS, wherein the file metadata on the DMS is sent to the DMS pushes PUSH to get;

The selected unit, after browsing through the browsing unit, selects a first media file that needs to be played;

A notification unit, configured to notify the DMR to establish a connection with the DMS after the selection unit selects the first media file, so that the DMR can send the playback to the DMS through the connection The request for the first media file enables the DMS to obtain the first media file from the cloud storage device through the cloud storage control module after receiving the request, and transmit the first media file to the DMR for playback by the DMR.

In another aspect, a multimedia storage and playback system includes: a digital media server DMS, a digital media player DMR, a digital media controller DMC, a scanning module, and a cloud storage control module, wherein the DMS, the DMR and the DMC is implemented based on the DLNA protocol;

The scanning module is configured to regularly send a request to scan the storage content of the cloud storage device to the cloud storage control module, and push PUSH file metadata to the DMS when the content on the cloud storage device is found to be updated;

The cloud storage control module is configured to access the file information stored in the cloud storage device after receiving the request, and send the acquired file information to the scanning module, so that the scanning module receives the file information Cache the file information locally;

The DMC is configured to browse media files represented by file metadata on the DMS, select a first media file to be played, and notify the DMR to establish a connection with the DMS;

The DMR is configured to send a request to the DMS to play the first media file through the connection, receive the first media file sent by the DMS, and play it.

The DMS is configured to obtain the first media file from the cloud storage device through the cloud storage control module after receiving the request and transmit it to the DMR.

The embodiment of the present invention provides a method for accessing a cloud storage device based on DLNA technology, a DMC, and a multimedia storage and playback system. The DMC browses media files represented by file metadata on the DMS, wherein the file metadata on the DMS is found by the scanning module. When the content on the device is updated, push PUSH to DMS to get it; DMC selects a first media file that needs to be played; DMC notifies DMR to establish a connection with DMS, so that DMR sends to DMS the instruction to play the first media file through the connection Request, after receiving the request, the DMS obtains the first media file from the cloud storage device through the cloud storage control module and transmits it to the DMR, which is played by the DMR. Acquiring media resources and playing them by DMR can realize the sharing of media resources on cloud storage devices by devices based on DLNA technology.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

FIG. 1 is a flow chart of a method for accessing a cloud storage device provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of a device implementing a method for accessing a cloud storage device in an embodiment of the present invention and its information flow relationship;

FIG. 3 is a flow chart of another method for accessing a cloud storage device provided by an embodiment of the present invention;

FIG. 4 is a structural diagram of a DMC provided by an embodiment of the present invention;

FIG. 5 is a structural diagram of a multimedia storage and playback system provided by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. 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.

The embodiment of the present invention provides a method for accessing a cloud storage device based on DLNA technology, which is applied to a digital media server DMS, a digital media player DMR, a digital media controller DMC, a scanning module, a cloud storage control module and a cloud storage device. A multimedia storage and playback system, wherein the DMS, the DMR and the DMC are implemented based on the DLNA protocol;

The scanning module is configured to periodically send a request for scanning the storage content of the cloud storage device to the cloud storage control module, and the cloud storage control module accesses the file information stored in the cloud storage device after receiving the request, and sends The acquired file information is sent to the scanning module, so that the scanning module caches the file information locally after receiving the file information;

As shown in Figure 1, the method includes:

101. The DMC browses the media files represented by file metadata on the DMS, wherein the file metadata on the DMS is obtained by pushing PUSH to the DMS when the scanning module finds that the content on the cloud storage device is updated;

The scanning module regularly or irregularly finds that the content on the cloud storage device is updated and pushes it to the DMS, and the DMS saves the file metadata pushed by the scanning module for regular or irregular browsing by the DMC.

102. The DMC selects a first media file to be played;

After browsing, the user can control or select a first media file to be played by the DMC according to preset rules.

103. The DMC notifies the DMR to establish a connection with the DMS, so that the DMR sends a request for playing the first media file to the DMS through the connection. After receiving the request, the DMS obtains the first media file from the cloud storage device through the cloud storage control module And sent to DMR, played by DMR.

That is, after the DMC selects a first media file to be played, it can be finally played by the DMR. In practical applications, DMC can be a DLNA-based terminal application (such as an application program on a mobile phone, a tablet, or a PC), and DMR can be a device for controlling a TV (or integrated inside the TV). Based on the above specific implementation, a typical application scenario of this embodiment is: the user can choose to play a file on the mobile phone from the cloud storage device, and then the file will be played on the TV.

The method for accessing a cloud storage device based on DLNA technology provided in this embodiment, the DMC browses the media file represented by the file metadata on the DMS, wherein the file metadata on the DMS is updated when the content on the cloud storage device is found by the scanning module DMS pushes PUSH to get it; DMC selects a first media file that needs to be played; DMC notifies DMR to establish a connection with DMS, so that DMR sends a request to play the first media file to DMS through the connection, and DMS receives the request. Obtain the first media file from the cloud storage device through the cloud storage control module and send it to the DMR, and the DMR will play it. The DMS, DMR and DMC implemented based on the DLNA protocol can obtain media resources from the cloud storage device and be played by the DMR. Play, which can realize the sharing of media resources on cloud storage devices by devices based on DLNA technology.

As an improvement of the method embodiment shown in Figure 1, the embodiment of the present invention provides another method for accessing a cloud storage device based on DLNA technology, which is applied to a digital media server DMS, a digital media player DMR, and a digital media controller DMC. , a scanning module, a cloud storage control module, and a multimedia storage and playback system composed of cloud storage devices. The data and signal flow relationship between the various components in the system is shown in Figure 2, where DMS, DMR, and DMC are based on the DLNA protocol accomplish;

Referring to Figure 2, the scanning module is used to periodically send a request for scanning the storage content of the cloud storage device to the cloud storage control module, and the cloud storage control module accesses the file information stored in the cloud storage device after receiving the request, and sends the acquired file information to The scanning module makes the scanning module cache the file information locally after receiving the file information;

Specifically, as shown in Figure 3, the method provided in this embodiment includes the following steps:

301. The scanning module periodically sends a request for scanning content stored in the cloud storage device to the cloud storage control module.

The cloud storage device stores media content from at least two different terminals. The cloud storage control module is equivalent to the interface between the scanning module and the cloud storage device. File information may include: file name, file size, creation time, etc.

302. After receiving the request from the scanning module, the cloud storage control module accesses the file information stored in the cloud storage device, and sends the obtained file information to the scanning module.

After the scanning module receives the file information, it parses the file information and caches it locally.

303. The scanning module sends the received file metadata used to represent the media file to the DMS.

When the scanning module finds that the content on the cloud storage device is updated, it pushes the newly added file metadata used to represent the media file to the DMS, and the DMS receives and saves the file metadata sent by the scanning module.

304. The DMC browses the media files represented by the file metadata on the DMS, and selects a first media file to be played.

The user browses the media file information on the DMS through the DMC, and selects the file metadata of the media file waiting to be played from the media file information.

305. After determining the device capable of playing in the system as the DMR, the DMC sends a connection notification to the DMR, notifying the DMR to establish a connection with the DMS.

There can be only one DMR or multiple DMRs. When there are multiple DMRs, the DMC will send a connection notification to each DMR.

306. The DMS receives the request for playing the first media file sent by the DMR through the connection between the DMR and the DMS.

The DMR obtains media resources on the cloud storage device through the DMS, and the DMR can be a part of the DMS or a device other than the DMS.

307. Detect whether the first media file already exists in the cloud storage control module.

The cloud storage control module is provided with a storage area for storing media content, and the DMS detects whether the first media file already exists in the storage area of the cloud storage control module by CSF-API (CSF-Application Programming Interface, CSF application programming interface).

Preferably, in order to ensure the transparency of the access operation of the DMS to the cloud storage device, the file operations in the storage area of the cloud storage control module are encapsulated into common file operations.

The method for accessing the cloud storage device provided by the embodiment of the present invention remotely reads the content on the cloud storage device through the CSF-API, and then transmits it to the DMR for online playback. The interface of CSF-API for cloud storage devices must be adapted to the above-mentioned systems. This type of interface generally uses SOAP (Simple Object Access Protocol, Simple Object Access Protocol) or REST (Representational State Transfer, representational state transfer), and the difference between different systems is compared However, it is better for the CSF-API to have a unified interface for the device used to access the cloud storage device, which requires the CSF-API to be transparent to the access operation of the cloud storage device. In the embodiment of the present invention, the transparent interface is uniformly packaged into a common file operation interface in the CSF-API, such as fopen, fread, fseek, fwrite, fclose and other functions, so that for CSF-API users Remote cloud storage devices can be accessed in the same way as local storage.

If the first media file does not exist in the cloud storage control module, execute step 308; otherwise, execute step 309.

308. The cloud storage control module downloads the first media file from the cloud storage device in a parallel download manner.

In order to quickly provide users with media content and make the media content play smoothly, after receiving the media playback request from the DMR, the DMS can download the media resources from the cloud storage device in parallel download through the CSF-API, and store them in the cloud storage control in the memory area of the module. Execute step 310 .

309. The DMS directly downloads the first media file from the cloud storage control module.

If there is already the first media file in the storage area of the cloud storage control module, then the DMS directly obtains the first media file from the storage area of the cloud storage control module by CSF-API, so as to speed up the speed of providing media content for the user, and make the media content Plays smoothly. Execute step 310 .

Directly download the media content corresponding to the media identification information from the storage area, which can ensure the smooth playback of the media player and the quick response of the play by time operation. Specifically, the so-called Play by time is that we drag the progress bar and jump when we play the video. Start playing at a certain point in time before or after. To display an intermediate image during the dragging process, it is necessary to obtain the media data of each intermediate point. The existing cloud storage device access is based on the download of the entire file. To obtain the effective media data of each intermediate point, it is necessary to download the corresponding long segment of data, which will not only cause slow response, but also many previously downloaded Most of the data is discarded, resulting in waste of resources. The storage area set here can make up for this defect. When jumping is required, just find the data of the playback point directly from the storage area. Of course, the jump range must be within the range of the data stored in the storage area to ensure immediate response. If the data range is stored, it needs to wait for the download from the cloud storage device to respond.

310. While downloading the first media file, send the downloaded part of the media content to the DMR for playing.

In order to reduce the waiting time for the user to play, the device for accessing the cloud storage device sends the media content to the DMR in a manner of downloading and sending at the same time, giving the user the feeling of playing online.

In this embodiment, DMR can be a playback device, such as a set-top box, or the TV set itself, which is used to play media files (such as allowing the TV set to play the files selected by the user on the mobile phone); DMS can be a separate hardware device used for Store various media resources, of course, this hardware device can also be integrated into set-top boxes and TVs; the scanning module and cloud storage control module can be based on the same hardware device as DMS, and complete mutual communication between DMS and cloud storage; DMC can It is an application software on a DLNA-based terminal device to control media playback (such as browsing and playing media files on mobile phones, tablets, and PCs).

Through this embodiment, the media resource can be obtained from the cloud storage device based on the DLNA device for playing. Compared with the DLNA system in the prior art, the user can be provided with a wider selection range of media resources and user experience can be enhanced.

The method for accessing a cloud storage device based on DLNA technology provided in this embodiment, the DMC browses the media file represented by the file metadata on the DMS, wherein the file metadata on the DMS is updated when the content on the cloud storage device is found by the scanning module DMS pushes PUSH to get it; DMC selects a first media file that needs to be played; DMC notifies DMR to establish a connection with DMS, so that DMR sends a request to play the first media file to DMS through the connection, and DMS receives the request. Obtain the first media file from the cloud storage device through the cloud storage control module and send it to the DMR, and the DMR will play it. The DMS, DMR and DMC implemented based on the DLNA protocol can obtain media resources from the cloud storage device and be played by the DMR. Play, which can realize the sharing of media resources on cloud storage devices by devices based on DLNA technology.

In order to realize the above-mentioned method, the embodiment of the present invention provides a kind of DMC correspondingly, this DMC and DMS, DMR, scanning module, cloud storage control module and cloud storage device constitute the multimedia storage playing system shown in Fig. 2, wherein, DMS, DMR and DMC is implemented based on DLNA protocol;

The scanning module is used to periodically send a request for scanning the storage content of the cloud storage device to the cloud storage control module. After receiving the request, the cloud storage control module accesses the file information stored in the cloud storage device, and sends the acquired file information to the scanning module, so that After the scanning module receives the file information, it caches the file information locally;

As shown in FIG. 4 , the DMC includes: a browsing unit 41 , a selection unit 42 , and a notification unit 43 .

The browsing unit 41 is used for the DMC to browse the media files represented by the file metadata on the DMS, wherein the file metadata on the DMS is sent to all when the scanning module finds that the content on the cloud storage device is updated. The above DMS pushes PUSH to obtain;

The selection unit 42 is used to select a first media file to be played after browsing through the browsing unit;

A notification unit 43, configured to notify the DMR to establish a connection with the DMS after the selection unit selects the first media file, so that the DMR can send the media file to the DMS through the connection. Play the request of the first media file, so that after the DMS receives the request, the cloud storage control module obtains the first media file from the cloud storage device and transmits it to the DMR, and the DMR plays it .

The DMC provided by the present embodiment, the DMC browses the media file represented by the file metadata on the DMS, wherein the browsing unit browses the media file represented by the file metadata on the DMS; the selected unit selects a first media file that needs to be played; The notification unit notifies the DMR to establish a connection with the DMS, so that the DMR sends a request for playing the first media file to the DMS through the connection, and after receiving the request, the DMS obtains the first media file from the cloud storage device through the cloud storage control module and transmits it To the DMR, played by the DMR, under the control of the above-mentioned DMC, the above-mentioned DMS and DMR based on the DLNA protocol can obtain media resources from the cloud storage device and be played by the DMR, which can realize the device sharing cloud based on DLNA technology Media resources on storage devices.

Further optionally, the DMC shown in Figure 4 also includes:

The determining unit 44 is used for the DMC to determine a device capable of playing in the system as the DMR.

Further optionally, the scanning module and the cloud storage control module are located in the same device, or the scanning module and the cloud storage control module are set in the DMS.

Further optionally, the file operations in the cloud storage control module are encapsulated into common file operations.

The embodiment of the present invention also provides a kind of multimedia storage playing system, as shown in Figure 5, comprises: DMS51, DMR 52, DMC 53, scanning module 54, cloud storage control module 55, wherein, DMS 51, DMR 52 and DMC 53 Realized based on the DLNA protocol;

The scanning module 54 is used to regularly send a request to scan the storage content of the cloud storage device to the cloud storage control module, and push the PUSH file metadata to the DMS when the content on the cloud storage device is found to be updated;

After receiving the request, the cloud storage control module 55 accesses the file information stored in the cloud storage device, and sends the obtained file information to the scanning module, so that the scanning module will store the file information after receiving the file information. The above file information is cached locally;

The DMC 51 is used to browse the media files represented by file metadata on the DMS, select a first media file that needs to be played, and notify the DMR to establish a connection with the DMS;

The DMR 52 is configured to send a request to the DMS to play the first media file through the connection, receive the first media file sent by the DMS, and play it.

The DMS 53 is configured to obtain the first media file from the cloud storage device through the cloud storage control module after receiving the request and transmit it to the DMR.

Preferably, after receiving the request, the DMS 53 obtains the first media file from the cloud storage device through the cloud storage control module, and transmits the first media file to the DMR.

In the multimedia storage and playback system provided by the present embodiment, the DMC browses the media file represented by the file metadata on the DMS, wherein the DMC browses the media file represented by the file metadata on the DMS; the DMC selects a first media file that needs to be played; The DMC notifies the DMR to establish a connection with the DMS so that the DMR sends a request for playing the first media file to the DMS through the connection. After receiving the request, the DMS obtains the first media file from the cloud storage device through the cloud storage control module and transmits it to the DMS. DMR, played by DMR, under the control of the above-mentioned DMC, the above-mentioned DMS and DMR based on the DLNA protocol can obtain media resources from the cloud storage device and be played by the DMR, which can realize the sharing of cloud storage by devices based on DLNA technology Media resources on the device.

As an improvement of the system shown in Figure 5, further optionally, the cloud storage control module 55 includes:

The direct sending subunit 551 is configured to send the first media file directly to the DMS when the first media file exists after receiving the request for acquiring the first media file sent by the DMS;

The parallel download subunit 552 is configured to, after receiving the request for acquiring the first media file sent by the DMS, when the first media file does not exist, download all the media files from the cloud storage device in a parallel downloading manner. the first media file, and send the downloaded first media file to the DMS.

Further optionally, the DMC 51 includes:

The determining subunit 511 is used for the DMC to determine the device capable of playing in the DLNA as the DMR.

Further optionally, the scanning module 54 and the cloud storage control module 55 are located in the same device, or the scanning module and the cloud storage control module are set in the DMS.

Further optionally, the file operations in the cloud storage control module 55 are encapsulated into common file operations.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be realized by means of software plus necessary general-purpose hardware, and of course also by hardware, but in many cases the former is a better embodiment . Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product is stored in a readable storage medium, such as a floppy disk of a computer , a hard disk or an optical disk, etc., including several instructions for enabling a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in various embodiments of the present invention.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (16)

1. A method for accessing cloud storage devices based on DLNA technology, characterized in that the application is composed of digital media server DMS, digital media player DMR, digital media controller DMC, scanning module, cloud storage control module and cloud storage device A multimedia storage and playback system, wherein the DMS, the DMR and the DMC are implemented based on the DLNA protocol; The scanning module is configured to regularly send a request for scanning the storage content of the cloud storage device to the cloud storage control module, and the cloud storage control module accesses the file information stored in the cloud storage device after receiving the request, and sends The acquired file information is sent to the scanning module, so that the scanning module caches the file information locally after receiving the file information; The methods include: The DMC browses the media files represented by file metadata on the DMS, wherein the file metadata on the DMS is obtained by pushing PUSH to the DMS when the scanning module finds that the content on the cloud storage device is updated; The DMC selects a first media file that needs to be played; The DMC notifies the DMR to establish a connection with the DMS, so that the DMR sends a request for playing the first media file to the DMS through the connection, so that the DMS receives the request The first media file is obtained from the cloud storage device through the cloud storage control module and transmitted to the DMR, and played by the DMR. 2. The method according to claim 1, wherein after the DMS receives the request, obtaining the first media file from the cloud storage device through the cloud storage control module and sending it to the DMR comprises: The DMS sends a request for obtaining the first media file to the cloud storage control module, so that the cloud storage control module sends the first media file to the DMS, or the cloud storage control module downloads the first media file from the cloud storage device in parallel download mode when the first media file does not exist, and sends the downloaded first media file to the DMS. 3. The method according to claim 2, wherein, after the DMS receives the request, the cloud storage control module obtains the first media file from the cloud storage device and sends it to the DMR as follows: After receiving the request, the DMS obtains the first media file from the cloud storage device through the cloud storage control module, and transmits the first media file to the DMR in a manner of sending while obtaining. 4. The method according to any one of claims 1-3, wherein before the DMC notifies the DMR to establish a connection with the DMS, the method further comprises The DMC determines a device capable of playing in the system as the DMR. 5. The method according to any one of claims 1-3, wherein the scanning module and the cloud storage control module are located in the same device, or the scanning module and the cloud storage control module are set in in the DMS. 6. The method according to any one of claims 1-3, wherein the file operations in the cloud storage control module are encapsulated into common file operations. 7. A kind of digital media controller DMC, it is characterized in that, described DMC and digital media server DMS, digital media player DMR, scanning module, cloud storage control module and cloud storage device form multimedia storage and playback system, wherein, described DMS, the DMR and the DMC are implemented based on the DLNA protocol; The scanning module is configured to periodically send a request for scanning the storage content of the cloud storage device to the cloud storage control module, and the cloud storage control module accesses the file information stored in the cloud storage device after receiving the request, and sends The acquired file information is sent to the scanning module, so that the scanning module caches the file information locally after receiving the file information; The DMC includes: A browsing unit, configured to browse media files represented by file metadata on the DMS, wherein the file metadata on the DMS is pushed to the DMS by PUSH when the scanning module finds that the content on the cloud storage device is updated get; The selection unit is used to select a first media file to be played after browsing through the browsing unit; A notification unit, configured to notify the DMR to establish a connection with the DMS after the selection unit selects the first media file, so that the DMR can send the playback to the DMS through the connection The request for the first media file, so that the DMS obtains the first media file from the cloud storage device through the cloud storage control module after receiving the request and sends it to the DMR, and the DMR performs play. 8. DMC according to claim 7, is characterized in that, also comprises: A determining unit, configured for the DMC to determine a device capable of playing in the system as the DMR. 9. The DMC according to claim 7, wherein the scanning module and the cloud storage control module are located in the same device, or the scanning module and the cloud storage control module are set in the DMS. 10. The DMC according to claim 9, wherein the file operations in the cloud storage control module are encapsulated into common file operations. 11. A multimedia storage and playback system, characterized in that it includes: a digital media server DMS, a digital media player DMR, a digital media controller DMC, a scanning module, and a cloud storage control module, wherein the DMS, the DMR and The DMC is implemented based on the DLNA protocol; The scanning module is configured to regularly send a request to scan the storage content of the cloud storage device to the cloud storage control module, and push PUSH file metadata to the DMS when the content on the cloud storage device is found to be updated; The cloud storage control module is configured to access the file information stored in the cloud storage device after receiving the request, and send the acquired file information to the scanning module, so that the scanning module receives the file information Cache the file information locally; The DMC is configured to browse media files represented by file metadata on the DMS, select a first media file to be played, and notify the DMR to establish a connection with the DMS; The DMR is configured to send a request to the DMS to play the first media file through the connection, receive the first media file sent by the DMS, and play it. The DMS is configured to obtain the first media file from the cloud storage device through the cloud storage control module after receiving the request and transmit it to the DMR. 12. The system according to claim 11, wherein the cloud storage control module comprises: The direct sending subunit is configured to send the first media file directly to the DMS when the first media file exists after receiving the request sent by the DMS for acquiring the first media file; The parallel downloading subunit is configured to, after receiving the request for acquiring the first media file sent by the DMS, download the first media file from the cloud storage device in a parallel downloading manner when the first media file does not exist. the first media file, and send the downloaded first media file to the DMS. 13. The system according to claim 11, wherein, after the DMS receives the request, the cloud storage control module obtains the first media file from the cloud storage device and transmits it to the DMR as follows: After receiving the request, the DMS obtains the first media file from the cloud storage device through the cloud storage control module, and transmits the first media file to the DMR in a manner of sending while obtaining. 14. The system according to claim 11, wherein the DMC comprises: The determining subunit is used for the DMC to determine the device capable of playing in the DLNA as the DMR. 15. The system according to any one of claims 10-14, wherein the scanning module and the cloud storage control module are located in the same device, or the scanning module and the cloud storage control module are set in in the DMS. 16. The system according to any one of claims 10-14, wherein the file operations in the cloud storage control module are encapsulated into common file operations.

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