CN102136289A - Methods, devices and systems for storing and reading media contents - Google Patents

Abstract

The embodiment of the present invention discloses a media content storage method, reading method, device and system, wherein the implementation of the method includes: receiving the media content of the live broadcast time-shift service; generating a rewind file of the media content for the Allocate storage slices for fast rewind files, and store the fast rewind files in the storage slices; if there are rewind files being generated after the storage slices are full, continue to allocate storage slices for the fast rewind files, and Unstored rewind files are stored in newly allocated storage slices; until all rewind files are stored. Store fast rewind files of unpredictable size through fragmentation, without pre-allocating a large storage space for fast rewind files of unpredictable size, which reduces the pre-occupied system storage space and realizes the matching of storage space allocation and storage requirements .

Description

A storage method, reading method, device and system for media content

technical field

The present invention relates to the field of storage technology, in particular to a storage method, reading method, device and system for media content.

Background technique

In the field of storage technology, data storage methods and storage devices are usually used. For example, the storage of live rewind files that need to be generated for time shifting in Video On Demand (VOD) is one of the many storage requirements.

With the popularization of time-shifted TV in live TV, users can use the time-shifted live broadcast of the real-time channel, and everyone can watch TV different from others, changing the tradition of people watching the same TV at the same time, and fully realizing the true personalization. Time shift refers to the fast forward, rewind, and pause operations of live TV. Users can pause the live broadcast channel through the remote control, just like X2, X4, and X6 using Digital Versatile Disc (DVD). , Fast forward and rewind operation of X8.

In the time-shifting system, in order to support time-shifting and rewinding, it is necessary to generate auxiliary rewinding files in real time.

With the development of content transmission network, content storage is stored in a hierarchical manner. Hierarchical data storage means that data objects are stored in different levels of storage devices (disk, disk array, optical library, tape library), and the automatic migration of data objects between storage devices is realized through hierarchical storage management software. The rules of data migration can be controlled manually, and are usually the best storage strategy determined according to factors such as data access frequency, retention time, capacity, and performance requirements. In the hierarchical data storage structure, low-cost storage resources such as tape libraries are used to store information that is accessed less frequently, while high-cost and fast devices such as disks or disk arrays are used to store important information that is frequently accessed. VOD content and recorded live content are stored in the central storage node; in this storage mode, the central storage will create an index file (index file) for each static or recorded live content to record the original file and rewind the file , file information of the fast-forward file and location information of the media data.

During the generation of live recording content, the original content, fast forward and rewind content, and index files are generated at the same time, and, as the live broadcast progresses, the recorded content continues to grow, and the fast rewind file, fast forward file, and index file are all It needs to be updated dynamically. The edge streaming server locates the live recording content by referring to the dynamically updated index file;

In general, the streaming server streams files in byte order. To achieve a backwards playback effect, it is required that the generated content be placed at the back end of the file storage space. When setting the generation of live recording content, the duration of the live recording content is usually set, and the system sets the size of the rewind file according to the duration of the live recording content*file bit rate. For the file system, after determining the end position (or end time) of the file, it means that the file size has been determined; at this time, if the live recording time is not estimated enough, such as basketball or tennis, it may be determined by adding time For the winning or losing game, if the game time estimate is too short, the rewind file size will be determined according to the estimated time. When the game is extended, the extended live content will not be written into the rewind file. In order to avoid this problem, it is usually necessary to regenerate a file and copy the original rewind data; this leads to several problems: 1. A large amount of data copying leads to additional system overhead; 2. The regenerated file destroys the index file The index relationship to related files will cause the fast rewind file on-demand to fail.

Set a fixed-size file according to the live recording content time. If the VOD content ends early, the storage space will be wasted; if the VOD content is prolonged, the subsequent content will not be able to generate rewind data; such problems generally exist in the needs The storage space is pre-allocated and the size of the files to be stored cannot be determined before the allocation, resulting in the problem that the allocated storage space cannot match the storage requirements.

Contents of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a storage method, reading method, device and system for media content, so as to realize the matching of storage space allocation and storage requirements.

In order to solve the above-mentioned technical problems, the embodiment of the method for storing media content provided by the present invention can be realized through the following technical solutions:

Receive the media content of the live broadcast time-shifting service;

Generate the fast rewind file of the media content, allocate storage slices for the fast rewind file, and store the fast rewind file to the storage slice; if there is still a fast rewind file being generated after the storage slice is full, then Continue to allocate storage slices for the rewind files, and store unstored rewind files in newly allocated storage slices until all rewind files are stored.

A method for reading media content, comprising:

Receiving a media content request message, the media content request message includes an external index and a content range of the rewind file to be read;

determining a storage segment for storing the rewind file according to the external index and the content range of the rewind file;

Read the rewind file from the storage slice and send it.

A storage device for media content, comprising:

The file receiving unit is used to receive the media content of the live broadcast time-shift service;

A file generating unit, configured to generate a rewind file of the media content;

A judging unit, configured to judge whether there is a rewind file being generated;

The storage control unit is used to allocate storage slices for the fast rewind file, and store the fast rewind file in the storage slice; if there is still a fast rewind file being generated after the storage slice is full, continue to create the fast rewind file for the fast rewind file. Rewind files are assigned storage shards, and unstored rewind files are stored in newly allocated storage shards until all rewind files are stored.

A device for reading media content, comprising:

The request receiving unit is used to receive the media content request message, and the media content request message includes the external index and the content range of the rewind file to be read;

A retrieval unit, configured to determine a storage segment for storing the rewind file according to the external index and content range of the rewind file;

A sending unit, configured to send and read the rewind file from the storage slice.

A storage system for media content, comprising: a storage device and a reading device, characterized in that the storage device is any one of the media content storage devices provided by the embodiments of the present invention, and the reading device is provided by the embodiments of the present invention A reading device for media content.

The above-mentioned technical solution has the following beneficial effects: the fast rewind file of unpredictable size is stored by fragmentation, and there is no need to pre-allocate a large storage space for the fast rewind file of unpredictable size, which reduces the pre-occupied system storage space and realizes storage space. The allocation of resources matches the storage requirements.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

Fig. 1 is a schematic flow chart of the method of the embodiment of the present invention;

Fig. 2 is a schematic flow chart of the method of the embodiment of the present invention;

FIG. 3 is a schematic diagram of a storage file structure according to an embodiment of the present invention;

Fig. 4 is the schematic diagram of the device structure of the embodiment of the present invention;

Fig. 5 is a schematic diagram of the device structure of the embodiment of the present invention;

Fig. 6 is a schematic structural diagram of a device according to an embodiment of the present invention;

Fig. 7 is a schematic diagram of the device structure of the embodiment of the present invention;

Fig. 8 is a schematic structural diagram of the device of the embodiment of the present invention;

Fig. 9 is a schematic diagram of the system structure of the 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.

A storage method for media content, as shown in Figure 1, comprising:

101: Receive the media content of the live time-shifting service; generate a rewind file of the above media content;

Here, the media content of the live broadcast time-shift service may be received continuously at one time or intermittently, and this application document does not limit how to receive the media content of the live broadcast time-shift service.

102: Allocate storage shards for the above fast rewind files, and store the fast rewind files in the storage shards; if there are rewind files being generated after the above storage shards are full, continue to allocate storage shards for the above fast rewind files , store the unstored rewind files in the newly allocated storage slice; until all the rewind files are stored.

Further, in the process of storing live rewind files, the order in which the above rewind files are stored in the storage segments is written sequentially from the back end of the storage segment to the front end.

In the above-mentioned embodiment, the fast rewind file of unpredictable size is stored by fragmentation, and it is not necessary to pre-allocate a large storage space for the fast rewind file of unpredictable size, which reduces the pre-occupied system storage space and realizes the allocation and storage of storage space matching of needs.

The size of the storage slices can all be the same size, or the size of the allocated storage slices can be set according to predetermined rules, which is not limited in this embodiment of the present invention, for example, the size can be fixed or the size can be decreased form to allocate storage slices. In addition, in order to facilitate the retrieval of rewind files in the future, you can also:

An identification ID is assigned to the storage slice, and the ID is used to represent the location information of the storage slice, that is, the path information of the storage slice. In order to clearly indicate the storage fragments of different rewind files, a prefix of the external index name of the rewind file can also be added to the identifier of the storage fragment, for example, the storage fragment is named as the external index name+ID of the rewind file.

In addition, it is also necessary to establish a fragment index; the above fragment index is used to represent the mapping relationship between the content range of the rewind file stored in the above storage fragment and the identifier of the above storage fragment, specifically, the content of the rewind file Ranges are expressed as byte ranges.

The method for storing corresponding media content The embodiment of the present invention also provides a method for reading media content, as shown in FIG. 2 , including:

201: Receive a media content request message, the above media content request message includes the external index and content range of the rewind file to be read;

202: Determine the storage slice for storing the above-mentioned fast-rewind file according to the external index and content range of the above-mentioned fast-rewind file;

Determining the storage segment for storing the above-mentioned fast-rewind file according to the external index and content range of the above-mentioned fast-rewind file includes: querying the segment index according to the external index and content range of the above-mentioned fast-rewind file, and determining the identification of the above-mentioned storage segment, wherein , the identifier of the storage segment is used to represent the location information of the storage segment; the storage segment is determined according to the identifier of the storage segment.

203: Read the aforementioned rewind file from the aforementioned storage slice and send it. The destination of the content sent here may be the sender of the media content request message, or a third-party device of the sender of the media content request message and the reader of the media content, which is not limited in this embodiment of the present invention.

The following will take the generation and reading of a live rewind file as an example to further describe the above embodiment in a systematic manner.

When the live recording content is generated, the rewind file is generated and stored in segments. After each segment is full, the next segment is generated until all the data in the rewind file is stored. Each slice can be set according to certain rules, one rule is set according to a fixed size; as shown in the schematic diagram 3 of the storage file, the overlapping square pattern represents four slices 301: rewind content (italics grid part) is written from the end of the rewind file to the head of the rewind file; when the live recording content, fast forward content and rewind content are generated, the index information of the media content is also synchronized to the index file (index file), for example : The index information of each video or audio sample in the file will be synchronized to the Index file, and as the live broadcast evolves, the index information will continue to increase. In the sharding rules, it also includes the naming rules for setting shards; the shard files are named according to the naming rules. A simple implementation method is: each fragment is assigned an ID, and the ID is related to the position of the fragment in the file. For example, assign 0 to the first fragment, assign 1 to the second fragment, and rewind the external index of the file to ABCD, then the name of the fragment is ABCD_0, ABCD_1.

The device for segmented storage and distribution of rewind files may include: user request processing logic, segment content locating logic, rewind file generator, and content sending logic. As shown in Figure 4:

401: The storage server receives a request from an external user to rewind the file;

402: The system first executes the fragment content positioning logic;

403: After segment content location logic, the ID and byte access of the segment are obtained; the ID of the segment corresponds to the storage path and file name of the segment file.

404: The content sending module obtains rewind content from the fast fragment generator (which may correspond to the storage device in Figure 3) according to the fragment ID and byte range, and then sends the rewind content required by the user to the user.

In this embodiment, when the central storage is processing live recording content, it can generate rewind files according to the length of the actual live program, saving system storage space; it can adapt to the longer or shorter time of live recording content, and generate appropriate rewind files Files; for fast rewind files, they can grow with time, reducing the pre-occupied system storage space.

A storage device for media content, as shown in Figure 5, comprising:

The file receiving unit 501 is used to receive the media content of the live broadcast time-shift service;

A file generation unit 502, configured to generate a rewind file of the above-mentioned media content;

Judging unit 503, configured to judge whether there is a fast rewind file being generated;

The storage control unit 504 is configured to allocate a storage segment for the above-mentioned fast rewind file, and store the fast rewind file in the storage segment; File allocation storage shards, and store unstored rewind files in newly allocated storage shards; until all received rewind files are stored.

More specifically, the above-mentioned storage control unit 504 being configured to allocate storage slices includes: allocating fixed-size or decreasing-size storage slices according to predetermined rules.

As shown in Figure 6, the above-mentioned device also includes:

The numbering unit 601 is configured to assign an identifier to the above-mentioned storage slice, and the above-mentioned identifier is used to represent the location information of the above-mentioned storage slice.

As shown in Figure 7, the above-mentioned device also includes:

The index establishment unit 701 is configured to establish a slice index, where the slice index is used to represent a mapping relationship between the content range of the rewind file stored in the storage slice and the identifier of the storage slice.

More specifically, the above-mentioned storage control unit 504, being used to store the rewind file in the storage segment includes: storing the rewind file in the storage sequence is sequentially written from the back end of the storage segment to the front end.

A device for reading media content, as shown in Figure 8, comprising:

The request receiving unit 801 is configured to receive a media content request message, where the media content request message includes the external index and content range of the rewind file to be read;

A retrieval unit 802, configured to determine a storage segment for storing the above-mentioned fast-rewind file according to the external index and content range of the above-mentioned fast-rewind file;

The sending unit 803 is configured to send the fast rewind file read from the storage slice.

More specifically, the retrieval unit 802 is configured to query the fragmentation index according to the external index and content range of the rewind file, and determine the identifier of the storage fragment, wherein the identifier of the storage fragment is used to indicate that the storage fragment The location information of the above-mentioned storage fragment is determined according to the identification of the above-mentioned storage fragment.

A storage system for media content, as shown in FIG. 9 , includes: a storage device 901 and a reading device 902, wherein the storage device 901 is a storage device for media content provided by any one of the embodiments of the present invention, and the reading device 902 is the A device for reading media content provided by any one of the embodiments of the invention.

In the above-mentioned embodiment, the fast rewind file of unpredictable size is stored by fragmentation, and it is not necessary to pre-allocate a large storage space for the fast rewind file of unpredictable size, which reduces the pre-occupied system storage space and realizes the allocation and storage of storage space matching of needs.

Those of ordinary skill in the art can understand that all or part of the steps in the method of the above-mentioned embodiments can be completed by instructing related hardware through a program, and the above-mentioned program can be stored in a computer-readable storage medium, the above-mentioned storage medium It can be read-only memory, disk or CD-ROM, etc.

A storage method, reading method, device, and system for media content provided by the embodiments of the present invention have been described in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present invention. The above embodiments The explanation is only used to help understand the method of the present invention and its core idea; meanwhile, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. In summary, this The content of the description should not be construed as limiting the present invention.

Claims (16)

1. the storage means of a media content is characterized in that, comprising:

Receive the media content of direct broadcast time-shift business;

Generating the rewind down file of described media content, is described rewind down file allocation storage burst, and the rewind down file storage is arrived described storage burst; If described storage burst is write the rewind down file that full back is generating in addition, then continue as described rewind down file allocation storage burst, the rewind down file storage of not storing is arrived newly assigned storage burst; Finish up to the whole storages of rewind down file.

2. according to the described method of claim 1, it is characterized in that described memory allocated is distributed and comprised:

According to regular allocation fixed size that pre-establishes or the big or small storage burst that successively decreases.

3. according to the described method of claim 1, it is characterized in that, also comprise: be described storage burst allocation identification, described sign is used to represent the positional information of described storage burst.

4. according to the described method of claim 3, it is characterized in that, also comprise: the prefix that increases the outside index name of described rewind down file for the sign of described storage burst.

5. according to the described method of claim 3, it is characterized in that, also comprise:

Set up the burst index, described burst index is in order to the mapping relations between the sign of the context of representing the rewind down file that described storage burst is stored and described storage burst.

6. according to any described method of claim 1 to 5, it is characterized in that described rewind down file storage writes for the rear end forward end from the storage burst successively to the storage order of storage burst.

7. the read method of a media content is characterized in that, comprising:

The receiving media content request message, described media content request message comprises the outside index and the context of the rewind down file that will read;

The storage burst that is identified for storing described rewind down file according to the outside index and the context of described rewind down file;

Reading described rewind down file cocurrent from described storage burst send.

8. according to the described method of claim 7, it is characterized in that the storage burst that is identified for storing described rewind down file according to the outside index of described rewind down file and context comprises:

According to the outside index and the context inquiry burst index of described rewind down file, determine the sign of described storage burst, wherein, the sign of described storage burst is used to represent the positional information of described storage burst;

Determine described storage burst according to the sign of described storage burst.

9. the memory storage of a media content is characterized in that, comprising:

The file receiving element is used to receive the media content of direct broadcast time-shift business;

File generating unit is used to generate the rewind down file of described media content;

Judging unit is used to judge whether the rewind down file that is generating in addition;

Storage control unit is used to described rewind down file allocation storage burst, and the rewind down file storage is arrived the storage burst; If described storage burst is write the rewind down file that full back is generating in addition, then continue as described rewind down file allocation storage burst, the rewind down file storage of not storing is arrived newly assigned storage burst; Finish up to the whole storages of rewind down file.

10. according to the described method of claim 9, it is characterized in that described storage control unit is used for the memory allocated burst and comprises: according to regular allocation fixed size that pre-establishes or the big or small storage burst that successively decreases.

11. according to the described device of claim 9, it is characterized in that, also comprise:

Numbered cell is used to described storage burst allocation identification, and described sign is used to represent the positional information of described storage burst.

12. according to the described device of claim 11, it is characterized in that, also comprise:

The unit set up in index, is used to set up the burst index, and described burst index is in order to the mapping relations between the sign of the context of representing the rewind down file that described storage burst is stored and described storage burst.

13., it is characterized in that described storage control unit is used for the rewind down file storage is comprised to the storage burst according to any described device of claim 9 to 12:

Be used for the storage order of rewind down file storage to storage write successively for the rear end forward end from the storage burst.

14. the reading device of a media content is characterized in that, comprising:

The request receiving element is used for the receiving media content request message, and described media content request message comprises the outside index and the context of the rewind down file that will read;

Retrieval unit is used for the storage burst that outside index and context according to described rewind down file are identified for storing described rewind down file;

Transmitting element is used for sending and reads described rewind down file from described storage burst.

15. according to the described device of claim 14, it is characterized in that, described retrieval unit, be used for outside index and context inquiry burst index according to described rewind down file, determine the sign of described storage burst, wherein, the sign of described storage burst is used to represent the positional information of described storage burst; Determine described storage burst according to the sign of described storage burst.

16. the storage system of a media content, comprise: memory storage and reading device, it is characterized in that: memory storage is the memory storage of any one media content of claim 9 to 13, and reading device is the reading device of the media content of claim 14 or 15.

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