CN112543355A - Distributed audio and video transmission method and system - Google Patents
Distributed audio and video transmission method and system Download PDFInfo
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- CN112543355A CN112543355A CN202011340185.2A CN202011340185A CN112543355A CN 112543355 A CN112543355 A CN 112543355A CN 202011340185 A CN202011340185 A CN 202011340185A CN 112543355 A CN112543355 A CN 112543355A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/242—Synchronization processes, e.g. processing of PCR [Program Clock References]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
- H04N21/2368—Multiplexing of audio and video streams
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
- H04N21/2389—Multiplex stream processing, e.g. multiplex stream encrypting
- H04N21/23895—Multiplex stream processing, e.g. multiplex stream encrypting involving multiplex stream encryption
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving MPEG packets from an IP network
- H04N21/4385—Multiplex stream processing, e.g. multiplex stream decrypting
- H04N21/43853—Multiplex stream processing, e.g. multiplex stream decrypting involving multiplex stream decryption
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/854—Content authoring
- H04N21/8547—Content authoring involving timestamps for synchronizing content
Abstract
The invention discloses a distributed audio and video transmission method and a system, firstly, based on a transmission mode, dividing a plurality of devices into a decapsulation server, an audio server, a video server and a synthesis server according to functions, and carrying out clock synchronization in a broadcasting mode; then, decapsulating the obtained source audio/video files to obtain multiple groups of corresponding audio files and video files; then, respectively acquiring a plurality of groups of first frames in the audio file and the video file, comparing time information of the first frames with the source audio/video file to obtain a plurality of corresponding file sequences, and carrying out synchronous transmission after encrypting by adding timestamps; and finally, decrypting the audio file and the video file which are transmitted in an encrypted manner, and synthesizing based on the file sequence, thereby improving the transmission effect of the distributed audio and video file.
Description
Technical Field
The invention relates to the technical field of computers, in particular to a distributed audio and video transmission method and system.
Background
With the development of network and culture cause, the audio and video resources are greatly enriched, and the distributed audio and video transmission system is more and more widely applied to IP network and optical fiber seat products. In a distributed audio and video transmission system, time difference exists among transmission devices, and the security of data is not guaranteed in the transmission process, so that the transmission effect of distributed audio and video files is low easily.
Disclosure of Invention
The invention aims to provide a distributed audio and video transmission method and a distributed audio and video transmission system, which are used for improving the transmission effect of distributed audio and video files.
In order to achieve the above object, in a first aspect, the present invention provides a distributed audio and video transmission method, including the following steps:
based on a transmission mode, performing function division on a plurality of devices, and performing clock synchronization in a broadcasting mode;
decapsulating the acquired source audio/video files to obtain a plurality of groups of corresponding audio files and video files;
acquiring file sequences corresponding to the audio file and the video file, and carrying out synchronous transmission after encrypting by adding timestamps;
and decrypting the audio file and the video file which are transmitted in an encrypted mode, and synthesizing the audio file and the video file based on the file sequence.
Wherein, based on the transmission mode, carry out the functional partitioning with many equipment to carry out clock synchronization with the mode of broadcasting, include:
dividing a plurality of transmission devices into a decapsulation server, an audio server, a video server and a composition server according to functions based on a transmission path;
and performing clock synchronization on the synthesis server, the audio server and the video server in a broadcasting mode.
Wherein the clock synchronization of the composition server, the audio server, and the video server in a broadcast manner includes:
transmitting synchronous messages to the audio servers and the video servers around the synthesis server in a broadcasting mode;
and after receiving the synchronous message of the synthesis server, sending a feedback synchronous message signal to the synthesis server in a point-to-point mode.
The method comprises the following steps of obtaining a file sequence corresponding to the audio file and the video file, adding a timestamp to encrypt the file sequence, and then performing synchronous transmission, wherein the method comprises the following steps:
respectively acquiring a plurality of groups of first frames in the audio file and the video file, and comparing time information of the first frames with the source audio/video file to obtain a plurality of corresponding file sequences;
and according to the file sequence, synchronously transmitting the audio file and the video file after adding timestamps and encrypting the audio file and the video file.
According to the file sequence, synchronously transmitting the audio file and the video file after being encrypted by adding timestamps, the method comprises the following steps:
and according to the file sequence, taking the time sequence of the corresponding file length as a time stamp, packaging the corresponding audio file and the video file by using the time stamp, and encrypting and synchronously transmitting the audio file and the video file to the synthesis server by using a corresponding private key.
Before the obtained source audio/video files are unpacked to obtain a plurality of groups of corresponding audio files and video files, the method further comprises the following steps:
the method comprises the steps of obtaining a source audio and video file, checking whether the source audio and video file is normal or not, and performing standard formatting conversion on the normal source audio and video file.
In a second aspect, the present invention provides a distributed audio/video transmission system, and a distributed audio/video transmission method according to the first aspect is applied to a distributed audio/video transmission system,
the distributed audio and video transmission system comprises a function division module, a clock synchronization module, a decapsulation module, a synchronous transmission module and a decryption synthesis module, wherein the function division module, the clock synchronization module, the decapsulation module, the synchronous transmission module and the decryption synthesis module are sequentially connected;
the function division module is used for dividing the plurality of transmission devices into a decapsulation server, an audio server, a video server and a synthesis server according to functions based on the transmission path;
the clock synchronization module is used for carrying out clock synchronization on the synthesis server, the audio server and the video server in a broadcasting mode;
the decapsulation module is used for decapsulating the acquired source audio/video files to obtain multiple groups of corresponding audio files and video files;
the synchronous transmission module is used for acquiring file sequences corresponding to the audio file and the video file, and carrying out synchronous transmission after encrypting by adding timestamps;
and the decryption synthesis module is used for decrypting the audio file and the video file which are transmitted in an encrypted mode and synthesizing the audio file and the video file based on the file sequence.
Firstly, dividing a plurality of devices into a decapsulation server, an audio server, a video server and a synthesis server according to functions based on a transmission mode, and carrying out clock synchronization in a broadcasting mode; then, decapsulating the obtained source audio/video files to obtain multiple groups of corresponding audio files and video files; then, respectively acquiring a plurality of groups of first frames in the audio file and the video file, comparing time information of the first frames with the source audio/video file to obtain a plurality of corresponding file sequences, and carrying out synchronous transmission after encrypting by adding timestamps; and finally, decrypting the audio file and the video file which are transmitted in an encrypted manner, and synthesizing based on the file sequence, thereby improving the transmission effect of the distributed audio and video file.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic step diagram of a distributed audio and video transmission method provided by the present invention.
Fig. 2 is a schematic structural diagram of a distributed audio/video transmission system provided in the present invention.
The device comprises a function division module 1, a clock synchronization module 2, a decapsulation module 3, a synchronous transmission module 4 and a decryption synthesis module 5.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the meaning of "a plurality" is two or more unless specifically limited otherwise.
Referring to fig. 1, the present invention provides a distributed audio and video transmission method, which includes the following steps:
and S101, dividing functions of a plurality of devices based on a transmission mode, and synchronizing clocks in a broadcasting mode.
Specifically, based on the transmission path of distributed audio and video, a plurality of transmission devices are divided into a decapsulation server, an audio server, a video server and a synthesis server according to functions, wherein the number of the decapsulation server, the audio server, the video server and the synthesis server is set according to actual use requirements, then the synthesis server is used as a central server, the synthesis server transmits synchronous messages to the audio server and the video server in a broadcasting mode, and after receiving the synchronous messages of the synthesis server, the audio server and the video server transmit feedback synchronous message signals to the synthesis server in a point-to-point mode, so that accurate relative synchronization is achieved, the stability and reliability of communication are improved, and the number of transmission paths is small, facilitating the increase of the transmission speed.
S102, the obtained source audio and video files are unpacked to obtain a plurality of groups of corresponding audio files and video files.
Specifically, a source audio and video file is acquired, whether the source audio and video file is normal or not is checked, if any one of audio or video cannot be played normally, the source audio and video file is corrected or acquired again, then standard format conversion is carried out on the normal source audio and video file, the source audio and video file is unified into one format, namely, audio is unified into one format, video is unified into one format, standard format conversion is carried out, and processing of the file is facilitated.
And then transmitting the source audio and video files to a decapsulation server for decapsulation, and dividing the decapsulated audio and video files into a plurality of groups of audio files and video files respectively in an equidistant manner, wherein if the last audio file or video file cannot have the content with the same length in the divided interval in the equidistant dividing process, artificially filling the audio file or video file with blanks to make the length of each audio file consistent with that of the video file, so that the transmission speed of the files can be controlled conveniently.
S103, acquiring file sequences corresponding to the audio file and the video file, adding a timestamp to encrypt the file sequences, and then performing synchronous transmission.
Specifically, the method includes the steps of respectively acquiring multiple groups of first frames in the audio file and the video file, and comparing time information of the multiple first frames with the source audio/video file to obtain multiple corresponding file sequences, and specifically includes: respectively obtaining first frames in the audio file and the video file at each interval length, comparing time information corresponding to the first frames with time information and content in the source audio and video file one by one, firstly comparing according to the time information, judging whether the time information is corresponding time information at the current interval, then judging whether the time information is file content at the current time information, comparing whether the content at the division intervals in the current audio file and the video file is consistent, if the content is consistent, numbering the corresponding audio file and the video file according to the sequencing of the division intervals to obtain a corresponding file sequence, and being convenient for effectively distinguishing the audio file from the video file.
According to the file sequence, taking a time sequence with a corresponding file length as a time stamp, namely the time stamp comprises corresponding time information from a first frame to a last frame of the audio file or the video file, and establishing a correlation relationship between the two time information as the corresponding time stamp; after the corresponding audio file and the video file are encapsulated by the timestamp, naming and encapsulating the audio file and the video file by taking the corresponding time error as an external name of the file; the corresponding private keys are used for encryption and synchronous transmission to the synthesis server, and the corresponding private keys are used for encryption transmission of the video file and the audio file, so that the situations that the files are leaked or tampered due to external invasion in the transmission process and the like can be reduced, and the safety of the files is improved.
S104, decrypting the audio file and the video file which are transmitted in an encrypted mode, and synthesizing the audio file and the video file based on the file sequence.
Specifically, after the synthesis server receives the audio files and the video files transmitted in an encrypted manner, the audio files and the video files are decrypted by using corresponding public keys, all the audio files and all the video files are arranged according to the time sequence of the time stamp after being packaged, the arranged audio files and the video files are unpacked again, all the audio files and all the video files are synthesized respectively according to the arrangement condition and the file sequence to obtain corresponding audio and video, then the corresponding audio and video files are synthesized to obtain the source files, meanwhile, blank files in the synthesized source files are searched, and the blank files are deleted to obtain the corresponding source audio and video files. By splitting the source audio and video file, adding a timestamp for encrypted transmission, and arranging and synthesizing according to the timestamp and the corresponding file sequence, a synthesized file identical to the source audio and video file can be obtained, the safety of the transmission process is ensured, the consistency of the file is also ensured, and the transmission effect of the distributed audio and video file is improved.
Referring to fig. 2, the present invention provides a distributed audio/video transmission system, and the distributed audio/video transmission method is applied to a distributed audio/video transmission system,
the distributed audio and video transmission system comprises a function division module 1, a clock synchronization module 2, a decapsulation module 3, a synchronous transmission module 4 and a decryption synthesis module 5, wherein the function division module 1, the clock synchronization module 2, the decapsulation module 3, the synchronous transmission module 4 and the decryption synthesis module 5 are connected in sequence;
the function dividing module 1 is used for dividing the plurality of transmission devices into a decapsulation server, an audio server, a video server and a synthesis server according to functions based on a transmission path;
the clock synchronization module 2 is configured to perform clock synchronization on the composition server, the audio server, and the video server in a broadcast manner;
the decapsulation module 3 is configured to decapsulate the acquired source audio/video file to obtain multiple groups of corresponding audio files and video files;
the synchronous transmission module 4 is used for acquiring file sequences corresponding to the audio file and the video file, and performing synchronous transmission after encrypting the file sequences with timestamps;
and the decryption synthesis module 5 is configured to decrypt the encrypted and transmitted audio file and video file, and synthesize the audio file and the video file based on the file sequence.
In this embodiment, the distributed audio/video transmission system includes a function division module 1, a clock synchronization module 2, a decapsulation module 3, a synchronization transmission module 4, and a decryption synthesis module 5, and first, based on a transmission mode, a plurality of devices are functionally divided into a decapsulation server, an audio server, a video server, and a synthesis server by the function division module 1, and then the clock synchronization module 2 is used to transmit synchronization packets to the audio server and the video server around the synthesis server in a broadcast mode; after the audio server and the video server receive the synchronous messages of the synthesis server, sending feedback synchronous message signals to the synthesis server in a point-to-point mode; subsequently, the obtained source audio and video files are unpacked by the unpacking module 3 to obtain a plurality of groups of corresponding audio files and video files; secondly, respectively acquiring a plurality of groups of first frames in the audio file and the video file, comparing time information of the first frames with the source audio/video file to obtain a plurality of corresponding file sequences, and carrying out synchronous transmission after encrypting by adding timestamps; and finally, decrypting the audio file and the video file which are transmitted in an encrypted manner, and synthesizing based on the file sequence, thereby improving the transmission effect of the distributed audio and video file.
Specific limitations on a distributed audio-video transmission system can be found in the above limitations on a distributed audio-video transmission method. All modules in the distributed audio and video transmission system can be completely or partially realized through software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
The invention relates to a distributed audio and video transmission method and a system thereof, wherein the distributed audio and video transmission system comprises a function division module 1, a clock synchronization module 2, a decapsulation module 3, a synchronous transmission module 4 and a decryption synthesis module 5; then, decapsulating the obtained source audio/video files to obtain multiple groups of corresponding audio files and video files; then, respectively acquiring a plurality of groups of first frames in the audio file and the video file, comparing time information of the first frames with the source audio/video file to obtain a plurality of corresponding file sequences, and carrying out synchronous transmission after encrypting by adding timestamps; and finally, decrypting the audio file and the video file which are transmitted in an encrypted manner, and synthesizing based on the file sequence, thereby improving the transmission effect of the distributed audio and video file.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A distributed audio and video transmission method is characterized by comprising the following steps:
based on a transmission mode, performing function division on a plurality of devices, and performing clock synchronization in a broadcasting mode;
decapsulating the acquired source audio/video files to obtain a plurality of groups of corresponding audio files and video files;
acquiring file sequences corresponding to the audio file and the video file, and carrying out synchronous transmission after encrypting by adding timestamps;
and decrypting the audio file and the video file which are transmitted in an encrypted mode, and synthesizing the audio file and the video file based on the file sequence.
2. The distributed audio/video transmission method according to claim 1, wherein a plurality of devices are functionally divided based on a transmission mode, and clock synchronization is performed in a broadcast mode, and the method includes:
dividing a plurality of transmission devices into a decapsulation server, an audio server, a video server and a composition server according to functions based on a transmission path;
and performing clock synchronization on the synthesis server, the audio server and the video server in a broadcasting mode.
3. A distributed audio-video transmission method according to claim 2, wherein clock-synchronizing the synthesis server, the audio server and the video server in a broadcast manner comprises:
transmitting synchronous messages to the audio servers and the video servers around the synthesis server in a broadcasting mode;
and after receiving the synchronous message of the synthesis server, sending a feedback synchronous message signal to the synthesis server in a point-to-point mode.
4. The distributed audio and video transmission method according to claim 1, wherein acquiring the file sequences corresponding to the audio file and the video file, and performing synchronous transmission after encrypting by adding a timestamp, comprises:
respectively acquiring a plurality of groups of first frames in the audio file and the video file, and comparing time information of the first frames with the source audio/video file to obtain a plurality of corresponding file sequences;
and according to the file sequence, synchronously transmitting the audio file and the video file after adding timestamps and encrypting the audio file and the video file.
5. The distributed audio and video transmission method according to claim 4, wherein according to the file sequence, the audio file and the video file are subjected to synchronous transmission after being time-stamped and encrypted, and the method comprises the following steps:
and according to the file sequence, taking the time sequence of the corresponding file length as a time stamp, packaging the corresponding audio file and the video file by using the time stamp, and encrypting and synchronously transmitting the audio file and the video file to the synthesis server by using a corresponding private key.
6. The distributed audio/video transmission method according to claim 5, wherein before the obtained source audio/video file is decapsulated to obtain a plurality of sets of corresponding audio files and video files, the method further comprises:
the method comprises the steps of obtaining a source audio and video file, checking whether the source audio and video file is normal or not, and performing standard formatting conversion on the normal source audio and video file.
7. A distributed audio-video transmission system, to which a distributed audio-video transmission method according to any one of claims 1 to 6 is applied, characterized in that,
the distributed audio and video transmission system comprises a function division module, a clock synchronization module, a decapsulation module, a synchronous transmission module and a decryption synthesis module, wherein the function division module, the clock synchronization module, the decapsulation module, the synchronous transmission module and the decryption synthesis module are sequentially connected;
the function division module is used for dividing the plurality of transmission devices into a decapsulation server, an audio server, a video server and a synthesis server according to functions based on the transmission path;
the clock synchronization module is used for carrying out clock synchronization on the synthesis server, the audio server and the video server in a broadcasting mode;
the decapsulation module is used for decapsulating the acquired source audio/video files to obtain multiple groups of corresponding audio files and video files;
the synchronous transmission module is used for acquiring file sequences corresponding to the audio file and the video file, and carrying out synchronous transmission after encrypting by adding timestamps;
and the decryption synthesis module is used for decrypting the audio file and the video file which are transmitted in an encrypted mode and synthesizing the audio file and the video file based on the file sequence.
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| WO2017185338A1 (en) * | 2016-04-29 | 2017-11-02 | 高翔 | Audio-video file generation method and apparatus |
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| US20040210948A1 (en) * | 2003-01-25 | 2004-10-21 | Huazhon University Of Science Technology | Video splitting and distributed placement scheme for clustered video servers |
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