CN107426630B - A kind of high-code file media data access method and system - Google Patents

Abstract

The invention discloses a high-code file media data access method and system. The method includes: S1: establishing a connection; S2: acquiring an MPD/M3U8 file; S3: parsing the MPD/M3U8 file; S4: accessing the file by a professional network access client. The system includes a media data server and a professional network access client, and the professional network access client is connected with the media data server. The invention improves the access efficiency of high-code file media data, each slice is a relatively independent individual, the parsing of the slice does not need the assistance of other slices, and a slice can be accessed after it is formed. The accessible media data access mode improves production efficiency and satisfies the trend of integrated development of professional video networks and Internet/mobile networks.

Description

A kind of high-code file media data access method and system

technical field

The present invention relates to media data access technology, in particular to a high-code file media data access method and system.

Background technique

Existing media data access technologies include media data access on professional video networks and media data access on the Internet/mobile network. The media data access of the professional video network is mainly through file sharing, and the media files are obtained through the professional link. There are many media data access methods on the Internet/mobile network: connection-oriented streaming media technologies such as RTSP/RTP, connectionless HTTP progressive download, and HTTP-based dynamic adaptive streaming access represented by DASH/HLS.

There are still some deficiencies in the existing media data access technologies: 1) The video and audio file storage solutions are not fully designed for video characteristics. Metadata separation, redundant file systems, etc. As a result, when accessing a file, only the entire file can be accessed, but no part of it can be accessed, which undoubtedly reduces the efficiency of access and also causes a great waste of bandwidth. Technologies such as DASH in Internet/mobile network applications have improved the storage and access of video and audio files, but professional video networks, as an important part of video and audio sources, cannot meet such requirements; 2) Professional video networks and Internet/mobile networks Network separation does not meet the trend of integrated development.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies of the prior art, provide a method and system for accessing high-code file media data, improve the access efficiency of high-code file media data, and help ensure the smoothness of video material access and improve bandwidth utilization. On the one hand, when the bandwidth is insufficient, access low-code materials to ensure the smoothness of material access, greatly reduce the frequency of jamming, and improve work efficiency; on the other hand, when the bandwidth is abundant, try to access high-code materials as much as possible , which maximizes bandwidth utilization while maximizing the visual experience.

The purpose of the present invention is to achieve through the following technical solutions: a high-code file media data access system, comprising: a media data server and a professional network access client; the professional network access client is connected with the media data server;

The professional network access client includes: client control module, MPD/M3U8 parsing module, slice parsing module, SDK access module and player;

The described client control module is used to control video playback;

Described MPD/M3U8 parsing module, is used for parsing MPD/M3U8 file, obtains the information of media file and its slice file;

The slice parsing module is used to parse the received slice file;

The SDK access module is used to send an access request to the media data server through the SDK;

The described player is used to play the parsed slice file;

The professional network access client is used to access the parsed slice file.

A method for accessing high-code file media data, comprising the steps of:

S1: establish a connection;

S2: Get MPD/M3U8 files;

S3: Parse MPD/M3U8 files;

S4: Professional network client to access files.

Further, including steps:

S5: Continuously acquire and play the video stream, and continue or change the bit rate of the acquired slice based on real-time bandwidth conditions and information in the MPD/M3U8 file.

Further, in step S1, a connection with the server is established in the radio and television dedicated network.

Further, through file sharing, the radio and television dedicated network and the server are connected.

Further, in step S2, including steps:

S21: After the connection is established, the professional network client sends an MPD/M3U8 request to the media data server through the SDK;

S22: After receiving the MPD/M3U8 request, the media data server sends the MPD/M3U8 file to the professional network client.

Further, in step S3, the MPD/M3U8 parsing module of the professional network client parses the MPD/M3U8 file, and parses out the information of all media files and their slice files.

The information of the media file includes time length, media type, number of slices and timing information of each slice; the information of the slice file includes start and end time, format, size, bit rate, resolution, bandwidth range and location information.

Further, in step S4, including steps:

S41: The client selects the media material to be played and sends the material information to the SDK access module;

S42: The SDK access module sends a media material request to the media data server through the SDK;

S43: After receiving the request information, the media data server sends the slice file of the corresponding media material to the professional network client;

S44: The slice parsing module of the professional network client parses the received slice file;

S45: Control the player to play the parsed slice file through the control module of the professional network client.

The beneficial effects of the present invention are:

(1) The access efficiency of high-code file media data is improved.

(2) Each slice is a relatively independent individual, and the parsing of the slice does not require the assistance of other slices. Therefore, a slice can be accessed after it is formed, realizing the media data access mode of collecting, returning, and accessing at the same time. Improved production efficiency.

(3) Combining the present invention with the Internet terminal access technology, it can meet the trend of integrated development of professional video network and Internet/mobile network.

(4) It is beneficial to ensure the smoothness of video material access and improve the utilization rate of bandwidth. On the one hand, when the bandwidth is insufficient, low-code material is accessed to ensure the smoothness of material access, greatly reducing the frequency of freezing, which can improve work efficiency. ; On the other hand, when the bandwidth is abundant, access high-code materials as much as possible, which can maximize the use of bandwidth and maximize the visual experience.

Description of drawings

FIG. 1 is a system structure diagram of the present invention.

FIG. 2 is a flow chart of the method steps of the present invention.

Detailed ways

The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[Example 1]

As shown in Figure 1, a high-code file media data access system includes: a media data server and a professional network access client; the professional network access client is connected to the media data server;

The professional network access client includes: client control module, MPD/M3U8 parsing module, slice parsing module, SDK access module and player;

The described client control module is used to control video playback;

Described MPD/M3U8 parsing module, is used for parsing MPD/M3U8 file, obtains the information of media file and its slice file;

The slice parsing module is used to parse the received slice file;

The SDK access module is used to send an access request to the media data server through the SDK;

The described player is used to play the parsed slice file;

The professional network access client is used to access the parsed slice file.

As shown in Figure 2, a high-code file media data access method, comprising the steps:

S1: establish a connection;

S2: Get MPD/M3U8 files;

S3: Parse MPD/M3U8 files;

S4: Professional network client to access files.

Further, including steps:

S5: Continuously acquire and play the video stream, and continue or change the bit rate of the acquired slice based on real-time bandwidth conditions and information in the MPD/M3U8 file.

Further, in step S1, a connection with the server is established in the radio and television dedicated network.

Further, through file sharing, the radio and television dedicated network and the server are connected.

Further, in step S2, including steps:

S21: After the connection is established, the professional network client sends an MPD/M3U8 request to the media data server through the SDK;

S22: After receiving the MPD/M3U8 request, the media data server sends the MPD/M3U8 file to the professional network client.

Further, in step S3, the MPD/M3U8 parsing module of the professional network client parses the MPD/M3U8 file, and parses out the information of all media files and their slice files.

The information of the media file includes time length, media type, number of slices and timing information of each slice; the information of the slice file includes start and end time, format, size, bit rate, resolution, bandwidth range and location information.

Further, in step S4, including steps:

S41: The client selects the media material to be played and sends the material information to the SDK access module;

S42: The SDK access module sends a media material request to the media data server through the SDK;

S43: After receiving the request information, the media data server sends the slice file of the corresponding media material to the professional network client;

S44: The slice parsing module of the professional network client parses the received slice file;

S45: Control the player to play the parsed slice file through the control module of the professional network client.

In the first embodiment of the present invention, the file simulation service module can be deployed on the access terminal or separately. The system is mainly composed of a media data server, a file simulation service, and an access terminal, wherein the media data server is composed of media slice files and MPD. /M3U8 file composition. Professional Network Access Client, including Professional Network Access Client.

The media slice file is a small file that divides the media file according to a fixed time. Each slice file has one or more slice files with different bit rates corresponding to it. The encoding format includes H.264/H.265/VP9. and other encoded low-bit-rate Internet access files, as well as professional video encoding files such as DNxHD/AVC-Intra/XAVC/ProRes. When professional network access clients access media data, they can automatically adjust the read slice files among multiple slice files with different bit rates according to the network location and bandwidth.

MPD/M3U8 files are media representation description files, including professional video network access information and Internet/mobile network access information, describing all media files on the server and information about their slice files. The information of media files includes: time length, media type, Number of slices, timing of each slice, slice file information (including: start and end time, format, size, bit rate, resolution, bandwidth range, location, etc.), etc. Different from the general MPD/M3U8 file of Mpeg-DASH, the MPD/M3U8 file of this application additionally records the file slice information of professional high code.

In the first embodiment of the present invention, special storage processing is performed on the media data, so that the data storage meets the technical requirements of high-code file access, including the steps:

(1) High-code-rate material storage, including high-code media files and high-code IP signals.

(2) During storage, the file/signal is sliced for a fixed time (eg: 3s) or GOP (a group of pictures).

(3) Each time a slice is divided, the slice file is compressed and transcoded to form multiple slice files with different bit rates, different formats, different resolutions, and different formats that can be applied to different bandwidth environments but with the same content.

(4) The information of MPD/M3U8 needs to be updated every time a slice file is divided, such as: the first slice is generated, the time length of the media material in MPD/M3U8 is 3s; the second slice is generated, the time length in MPD is 6s… ..., realizes the acquisition, transmission and access of real-time signals at the same time, which is conducive to improving production efficiency.

(5) The information recorded in the MPD/M3U8 file includes the media file information and the information of its slice files. The information of the media file includes: time length, media type, number of slices, timing of each slice, slice file information (including: start and end time, format , size, bit rate, resolution, bandwidth range, location, etc.)

(6) The high-code part of the file is described separately in the MPD/M3U8 file, which can prevent the player of the Internet/mobile network client from misreading the high-code video file, such as professional format video files such as MXF.

The invention improves the access efficiency of high-code file media data, each slice is a relatively independent individual, the parsing of the slice does not require the assistance of other slices, and a slice can be accessed after it is formed, realizing simultaneous collection, simultaneous return, and simultaneous The accessible media data access mode improves production efficiency and meets the trend of integrated development of professional video networks and Internet/mobile networks.

Those skilled in the art can realize that the modules and method steps of each example described in conjunction with the embodiments disclosed in this application can be implemented in the form of electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not depart from the scope of the present invention.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, for the specific working process of the above-described system and module, reference may be made to the corresponding process in the foregoing method embodiments, which will not be repeated here.

In the embodiments provided in this application, it should be understood that the disclosed systems, modules and methods may be implemented in other manners. For example, the above-described embodiments are only illustrative, and the division of the modules may only be a logical function division. In actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated. to another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection can be said to be through some interfaces, or indirect coupling or communication connection of modules, and it can also be in electrical, mechanical or other forms.

The modules described by the discrete components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, may be located in one place, or may be distributed to multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional module in this embodiment of the present invention may be integrated into one processing module, or each module may exist physically alone, or two or more modules may be integrated into one module.

If the functions are implemented in the form of software function modules and sold or used as independent products, they may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, Several instructions are included to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

The foregoing are only preferred embodiments of the present invention, and it should be understood that the present invention is not limited to the forms disclosed herein, and should not be construed as an exclusion of other embodiments, but may be used in various other combinations, modifications, and environments, and Modifications can be made within the scope of the concepts described herein, from the above teachings or from skill or knowledge in the relevant field. However, modifications and changes made by those skilled in the art do not depart from the spirit and scope of the present invention, and should all fall within the protection scope of the appended claims of the present invention.

Claims (7)

1. a high-code file media data access system, is characterized in that, comprising: media data server and professional network access client; Described professional network access client is connected with media data server; The professional network access client includes: client control module, MPD/M3U8 parsing module, slice parsing module, SDK access module and player; The described client control module is used to control video playback; Described MPD/M3U8 parsing module, is used for parsing MPD/M3U8 file, obtains the information of media file and its slice file, and carries out special storage processing to media data; Described MPD/M3U8 file additionally records professional high code file slice information; The slice parsing module is used to parse the received slice file; The SDK access module is used to send an access request to the media data server through the SDK; The described player is used to play the parsed slice file; The professional network access client is used to access the parsed slice file. 2. a high code file media data access method, is characterized in that, comprises the steps: S1: establish a connection; S2: Get MPD/M3U8 files; S3: Parse MPD/M3U8 files to obtain information about media files and their slice files; S4: Professional network client to access files; S5: Continuously acquire and play video streams, continue or change the bit rate of the acquired slices based on real-time bandwidth conditions and information in MPD/M3U8 files; Wherein, the step S4 also includes the following sub-steps: S41: The client selects the media material to be played and sends the material information to the SDK access module; S42: The SDK access module sends a media material request to the media data server through the SDK; S43: After receiving the request information, the media data server sends the slice file of the corresponding media material to the professional network client; S44: The slice parsing module of the professional network client parses the received slice file; S45: control the player to play the parsed slice file through the control module of the professional network client; Wherein, the step S3 obtains the information of the media file and its slice file, and specifically includes the following sub-steps: S301. High-code-rate material storage, including high-code media files and high-code IP signals; S302. When warehousing, the file signal is sliced at a fixed time or by GOP; S303. Each time a slice is divided, the slice file is compressed and transcoded to form multiple slice files with different bit rates, different formats, different resolutions, and different formats that are applicable to different bandwidth environments but with the same content; S304. The information of MPD/M3U8 needs to be updated every time a slice file is divided. 3 . The method for accessing high-code file media data according to claim 2 , wherein in step S1 , a connection with the server is established in a special network for broadcasting and television. 4 . 4. A method for accessing high-code file media data according to claim 2, characterized in that: a special network for broadcasting and television and a server are connected through file sharing. 5. a kind of high code file media data access method according to claim 2, is characterized in that: In step S2, including steps: S21: After the connection is established, the professional network client sends an MPD/M3U8 request to the media data server through the SDK; S22: After receiving the MPD/M3U8 request, the media data server sends the MPD/M3U8 file to the professional network client. 6. a kind of high code file media data access method according to claim 2, is characterized in that: in step S3, the MPD/M3U8 parsing module of professional network client parses MPD/M3U8 file, parses out all media files and its slice file information. 7. A kind of high code file media data access method according to claim 6, is characterized in that: the information of described media file comprises time length, media type, slice number and each slice timing information; The information of described slice file Including start and end time, format, size, bit rate, resolution, bandwidth range and location information.

Images