CN107426630B - High-code file media data access method and system - Google Patents
High-code file media data access method and system Download PDFInfo
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- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
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Abstract
The invention discloses a method and a system for accessing media data of a high-code file. The method comprises the following steps: s1: establishing connection; s2: acquiring an MPD/M3U8 file; s3: analyzing an MPD/M3U8 file; s4: and the professional network access client accesses the file. The system comprises a media data server and a professional network access client, wherein the professional network access client is connected with the media data server. The invention improves the access efficiency of the media data of the high-code file, each slice is a relatively independent individual, the analysis of the slice does not need the assistance of other slices, and the access can be realized after one slice is formed, thereby realizing the media data access mode of acquisition, return and access at the same time, improving the production efficiency and meeting the trend of the fusion development of a professional video network and the Internet/mobile network.
Description
Technical Field
The invention relates to a media data access technology, in particular to a method and a system for accessing media data of a high-code file.
Background
The existing media data access technology includes media data access of professional video networks and media data access of internet/mobile networks. Media data access of the professional video network mainly obtains media files through a professional link in a file sharing mode, and the format of the files mainly adopts a broadcasting and television professional video and audio format, such as: mxf,. avi, etc. The internet/mobile network has more media data access modes: RTSP/RTP, etc. connection-oriented streaming media technology, connectionless HTTP progressive download, HTTP-based dynamic adaptive streaming access represented by DASH/HLS.
The existing media data access technology still has some defects: 1) the video and audio file storage scheme is not fully designed for video characteristics, some video and audio storages are mostly constructed based on general storage and general file systems, and video characteristics are not considered, such as video metadata separation, redundant file systems and the like. When accessing the file, only the whole file can be accessed, but a part of the file cannot be accessed, which undoubtedly reduces the efficiency of access and causes great waste to bandwidth. Technologies such as DASH applied to internet/mobile network improve storage and access of video and audio files, but professional video networks as an important part of video and audio sources cannot meet the requirements; 2) the professional video network and the internet/mobile network are separated, and the trend of fusion development is not met.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method and a system for accessing media data of a high-code file, which improve the access efficiency of the media data of the high-code file, are beneficial to ensuring the smoothness of the access of video materials and improving the utilization rate of bandwidth; on the other hand, when the bandwidth is surplus, the high-code material is accessed as much as possible, so that the bandwidth can be utilized to the maximum extent, and the visual experience is improved to the maximum extent.
The purpose of the invention is realized by the following technical scheme: a high code file media data access system, comprising: the system comprises 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 comprises: the system comprises a client control module, an MPD/M3U8 analysis module, a slice analysis module, an SDK access module and a player;
the client control module is used for controlling video playing;
the MPD/M3U8 analyzing module is used for analyzing an MPD/M3U8 file and acquiring information of a media file and a slice file thereof;
the slice analysis module is used for analyzing the received slice file;
the SDK access module is used for sending an access request to the media data server through the SDK;
the player is used for playing the analyzed slice file;
and the professional network access client is used for accessing the analyzed slice file.
A high code file media data access method comprises the following steps:
s1: establishing connection;
s2: acquiring an MPD/M3U8 file;
s3: analyzing an MPD/M3U8 file;
s4: the professional network client accesses the file.
Further, comprising the steps of:
s5: and continuously acquiring and playing the video stream, and continuing or changing the code rate of the acquired slice based on the real-time bandwidth condition and the information in the MPD/M3U8 file.
Further, in step S1, a connection with the service end is established in the radio and television private network.
Furthermore, the broadcasting and television private network and the server are connected through file sharing.
Further, in step S2, the method includes the steps of:
s21: after the connection is established, the professional network client sends an MPD/M3U8 request to the media data server through the SDK;
s22: and 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 web client parses the MPD/M3U8 file, and parses information of all media files and their slice files.
The information of the media file comprises time length, media types, slice numbers and time sequence information of each slice; the information of the slice file includes start and stop time, format, size, code rate, resolution, bandwidth range, and location information.
Further, in step S4, the method includes the steps of:
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 corresponding slice files of the media materials to the professional network client;
s44: a slice analysis module of the professional network client analyzes the received slice file;
s45: and controlling the player to play the analyzed slice file through a control module of the professional network client.
The invention has the beneficial effects that:
(1) the access efficiency of the high-code file media data is improved.
(2) Each slice is a relatively independent individual, and the analysis of the slices does not need the assistance of other slices, so that one slice can be accessed after being formed, the media data access modes of acquisition, return and access are realized, and the production efficiency is obviously improved.
(3) The invention combines the internet terminal access technology, and can meet the trend of the convergence development of professional video networks and internet/mobile networks.
(4) The access smoothness of the video materials is favorably ensured, the utilization rate of the bandwidth is improved, on one hand, when the bandwidth is insufficient, the low-code materials are accessed to ensure the access smoothness of the materials, the frequency of occurrence of blocking is greatly reduced, and the working efficiency can be improved; on the other hand, when the bandwidth is surplus, the high-code material is accessed as much as possible, so that the bandwidth can be utilized to the maximum extent, and the visual experience is improved to the maximum extent.
Drawings
FIG. 1 is a system block diagram of the present invention.
FIG. 2 is a flow chart of the method steps of the present invention.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
[ EXAMPLES one ]
As shown in fig. 1, a high-code file media data access system includes: the system comprises 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 comprises: the system comprises a client control module, an MPD/M3U8 analysis module, a slice analysis module, an SDK access module and a player;
the client control module is used for controlling video playing;
the MPD/M3U8 analyzing module is used for analyzing an MPD/M3U8 file and acquiring information of a media file and a slice file thereof;
the slice analysis module is used for analyzing the received slice file;
the SDK access module is used for sending an access request to the media data server through the SDK;
the player is used for playing the analyzed slice file;
and the professional network access client is used for accessing the analyzed slice file.
As shown in fig. 2, a method for accessing media data of a high-code file includes the steps of:
s1: establishing connection;
s2: acquiring an MPD/M3U8 file;
s3: analyzing an MPD/M3U8 file;
s4: the professional network client accesses the file.
Further, comprising the steps of:
s5: and continuously acquiring and playing the video stream, and continuing or changing the code rate of the acquired slice based on the real-time bandwidth condition and the information in the MPD/M3U8 file.
Further, in step S1, a connection with the service end is established in the radio and television private network.
Furthermore, the broadcasting and television private network and the server are connected through file sharing.
Further, in step S2, the method includes the steps of:
s21: after the connection is established, the professional network client sends an MPD/M3U8 request to the media data server through the SDK;
s22: and 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 web client parses the MPD/M3U8 file, and parses information of all media files and their slice files.
The information of the media file comprises time length, media types, slice numbers and time sequence information of each slice; the information of the slice file includes start and stop time, format, size, code rate, resolution, bandwidth range, and location information.
Further, in step S4, the method includes the steps of:
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 corresponding slice files of the media materials to the professional network client;
s44: a slice analysis module of the professional network client analyzes the received slice file;
s45: and controlling the player to play the analyzed slice file through a control module of the professional network client.
In the first embodiment of the present invention, the file simulation service module may be deployed at the access terminal, or may be deployed separately, and the system mainly includes a media data server, a file simulation service, and an access terminal, where the media data server includes a media slice file and an MPD/M3U8 file. And the professional network access client comprises a professional network access client.
The media slice file is a small file which divides the media file according to fixed time, each slice file has one or more slice files with different code rates corresponding to the slice file, and the coding format comprises a low-code-rate Internet access file coded by H.264/H.265/VP9 and the like and a professional video coding file coded by DNxHD/AVC-Intra/XAVC/ProRes and the like. When a professional network access client accesses media data, the read slice files can be automatically adjusted in the slice files with different code rates according to the network position and the bandwidth.
The MPD/M3U8 file is a media representation description file, which includes professional video network access information and internet/mobile network access information, and describes information of all media files and their slice files on the server, and the information of the media files includes: time length, media type, number of slices, timing of each slice, slice file information (including start and end time, format, size, bitrate, resolution, bandwidth range, location, etc.), etc. Unlike the MPD/M3U8 file of the general Mpeg-DASH, the MPD/M3U8 file of the application additionally records professional high-code file slice information.
In the first embodiment of the present invention, a special storage process is performed on media data, so that data storage meets the technical requirement of high-code file access, including the steps of:
(1) and warehousing the high-code-rate materials, including high-code media files and high-code IP signals.
(2) When entering the storage, the file/signal is sliced according to a fixed time (such as 3 s) or according to GOP (group of pictures).
(3) And performing operations such as compression transcoding and the like on the slice file by dividing each slice to form a plurality of slice files which can be suitable for different bandwidth environments and have different code rates, different breadths, different resolutions, different formats and consistent contents.
(4) The information of the MPD/M3U8 needs to be updated every time a slice file is divided, for example: generating a first slice, wherein the time length of the media material in the MPD/M3U8 is 3 s; the second slice is generated, the time length in MPD is 6s … …, the simultaneous acquisition, simultaneous feedback and simultaneous access of real-time signals are realized, and the production efficiency is improved.
(5) The information recorded by the MPD/M3U8 file includes information of a media file and information of a slice file thereof, and 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, bitrate, resolution, bandwidth range, location, etc.), etc.
(6) The MPD/M3U8 file describes the high-code part separately, which can avoid the player of the Internet/mobile network client to misread the high-code video file, such as the video file in professional format like MXF.
The invention improves the access efficiency of the media data of the high-code file, each slice is a relatively independent individual, the analysis of the slice does not need the assistance of other slices, and the access can be realized after one slice is formed, thereby realizing the media data access mode of acquisition, return and access at the same time, improving the production efficiency and meeting the trend of the fusion development of a professional video network and the Internet/mobile network.
Those of skill in the art would appreciate that the various illustrative modules and method steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the module described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present application, it should be understood that the disclosed system, module and method may be implemented in other ways. For example, the above-described embodiments are merely illustrative, the division of the modules may be merely a logical division, and an actual implementation may have another division, for example, a plurality of modules or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be referred to as an indirect coupling or communication connection through some interfaces or modules, and may also be in an electrical, mechanical or other form.
The modules described as discrete components may or may not be physically separate, and the components shown as modules may or may not be physical modules, may be located in one place, or may be distributed over a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
In addition, each functional module in the embodiments of the present invention may be integrated into one processing module, or each module may exist alone physically, or two or more modules may be integrated into one module.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present invention or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A high code file media data access system, comprising: the system comprises 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 comprises: the system comprises a client control module, an MPD/M3U8 analysis module, a slice analysis module, an SDK access module and a player;
the client control module is used for controlling video playing;
the MPD/M3U8 analysis module is used for analyzing an MPD/M3U8 file, acquiring information of a media file and a slice file thereof, and performing special storage processing on media data; the MPD/M3U8 file additionally records professional high-code file slice information;
the slice analysis module is used for analyzing the received slice file;
the SDK access module is used for sending an access request to the media data server through the SDK;
the player is used for playing the analyzed slice file;
and the professional network access client is used for accessing the analyzed slice file.
2. A media data access method for high-code files is characterized by comprising the following steps:
s1: establishing connection;
s2: acquiring an MPD/M3U8 file;
s3: analyzing the MPD/M3U8 file to obtain the information of the media file and the slice file thereof;
s4: a professional network client accesses the file;
s5: continuously acquiring and playing the video stream, and continuing or changing the code rate of the acquired slice based on the real-time bandwidth condition and the information in the MPD/M3U8 file;
wherein, the step S4 further includes the following substeps:
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 corresponding slice files of the media materials to the professional network client;
s44: a slice analysis module of the professional network client analyzes the received slice file;
s45: controlling a player to play and analyze the slice file through a control module of the professional network client;
the step S3 of obtaining the information of the media file and the slice file thereof specifically includes the following sub-steps:
s301, high-code-rate materials are put into a warehouse and comprise high-code media files and high-code IP signals;
s302, when entering the warehouse, slicing the file signals according to fixed time or GOP;
s303, performing compression transcoding operation on the slice file every time a slice is divided to form a plurality of slice files which can be suitable for different bandwidth environments and have different code rates, different breadth, different resolutions, different formats and consistent contents;
s304, the information of the MPD/M3U8 needs to be updated every time one slice file is divided.
3. The method for accessing media data of high-code files according to claim 2, wherein: in step S1, a connection to the service end is established in the broadcast/television private network.
4. The method for accessing media data of high-code files according to claim 2, wherein: and connecting the broadcasting and television private network and the server through file sharing.
5. The method for accessing media data of high-code files according to claim 2, wherein:
in step S2, the method includes the steps of:
s21: after the connection is established, the professional network client sends an MPD/M3U8 request to the media data server through the SDK;
s22: and after receiving the MPD/M3U8 request, the media data server sends the MPD/M3U8 file to the professional network client.
6. The method for accessing media data of high-code files according to claim 2, wherein: in step S3, the MPD/M3U8 parsing module of the professional web client parses the MPD/M3U8 file, and parses information of all media files and their slice files.
7. The method for accessing media data of high-code files according to claim 6, wherein: the information of the media file comprises time length, media types, slice numbers and time sequence information of each slice; the information of the slice file includes start and stop time, format, size, code rate, resolution, bandwidth range, and location information.
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