CN113810741B - Direct recording and broadcasting video mixed arranging and broadcasting control system and method - Google Patents
Direct recording and broadcasting video mixed arranging and broadcasting control system and method Download PDFInfo
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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
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
- H04N21/234363—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by altering the spatial resolution, e.g. for clients with a lower screen resolution
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- H—ELECTRICITY
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- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
- H04L63/0457—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload wherein the sending and receiving network entities apply dynamic encryption, e.g. stream encryption
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- H04N19/40—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using video transcoding, i.e. partial or full decoding of a coded input stream followed by re-encoding of the decoded output stream
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- H—ELECTRICITY
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- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
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- H04N21/23424—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving splicing one content stream with another content stream, e.g. for inserting or substituting an advertisement
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- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
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- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The invention discloses a direct recording and broadcasting video mixed arranging and broadcasting control system and a method, wherein the system comprises the following steps: the system comprises a data safety transmission module, a live stream buffer module, a video mixed editing and broadcasting module and a video stream transcoding module. The data security transmission module is used for performing security encryption transmission on the related data and converting the recorded broadcast video into recorded broadcast media resource video fragments; the live stream caching module is used for caching live stream video clips according to live streams; the video mixed editing and broadcasting module is used for editing and outputting continuous live broadcast recording and broadcasting mixed streams according to the recording and broadcasting media resource video fragments and the live broadcast stream buffer fragments and the editing and broadcasting strategy; the video stream transcoding module is used for reinitializing the decoder according to the live broadcast recording and broadcasting mixed stream, transcoding the live broadcast recording and broadcasting mixed stream and outputting a video stream with unified code rate, resolution and key frame control parameters. The method can update the content of the media asset in real time, reduce manpower and material resources for updating the media asset, improve the safety of the media asset transmission process and reduce the occurrence of safety accidents.
Description
Technical Field
The invention relates to the technical field of computer video coding, in particular to a direct recording and broadcasting video mixed editing and playing control system and method.
Background
Video playing is becoming an indispensable medium resource transmission carrier in people's daily life. At present, more and more applications are in daily work and life, and gradually become a main spreading port for people to dispatch leisure every day.
The high-speed rail video is a main window for passenger service and railway propaganda of the high-speed rail train, and is an important platform for the integration and output of the railway audio-visual content in a novel media channel. At present, after the video content played by the television of the high-speed rail train passes the manual editing and checking, the video content is manually copied into a hard disk of a VER entertainment control system of the train when the train enters a power-on maintenance station of the motor train through media such as a U disk. The video transcoding software ffmpeg, vlc, gstreamer of the open source directly transcodes the live video stream recorded and broadcast mixed video stream, and the problems of blocking, screen display, green screen and the like of the video stream output after transcoding exist.
At present, after the video content played by the television of the high-speed rail train passes through manual editing and checking, when the train enters a bullet train station for maintenance through media such as a U disk, the video content is manually copied into a hard disk of a VER entertainment control system of the train, so that the following problems to be solved are urgent:
(1) The update period of the media asset content is basically more than one month, and part of vehicles can not be updated for a longer time. The program playing and arranging sequence is the same as the update period of the media assets, and the problem of untimely update exists.
(2) The updating efficiency is low, and only when the train enters the whole train of the motor train to be electrified, the updating can be copied one by one, so that a large amount of manpower, material resources and electric power are required to be consumed.
(3) In the updating process, security holes for the tampered replacement of a plurality of video media assets exist, and after the media assets pass the verification, the security holes for the tampered replacement of media assets or the insertion of other media assets exist in a transmission medium U disk and the like in the period from the time when the media assets pass the verification to the time when the media assets are copied to a VER entertainment controller hard disk of a train. In the process, the safety awareness of workers is high, the requirements on the working flow are extremely high, and production safety accidents can occur if the workers are neglected slightly.
Therefore, how to provide a system and a method for mixed editing and playing of a direct recording video based on the existing video stream playing control becomes a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above problems, the present invention provides a direct recording and broadcasting video mixed editing and playing control system and method for at least solving the above part of technical problems, which can update the content of the media asset in real time, reduce the investment of manpower and material resources for updating the media asset, improve the safety of the media asset transmission process, and reduce the occurrence of safety production accidents.
The embodiment of the invention provides a direct recording and broadcasting video mixed arranging and broadcasting control system, which comprises the following steps: the system comprises a data safety transmission module, a live stream buffer module, a video mixed editing and broadcasting module and a video stream transcoding module;
the data security transmission module is used for performing security encryption transmission on the acquired related data; the related data comprises a live broadcast stream, recorded broadcast video, a editing and broadcasting strategy and a control instruction; converting the recorded broadcast video into recorded broadcast media resource video fragments;
the live stream caching module is used for receiving the live stream sent by the data security transmission module and caching live stream video clips according to the live stream;
the video mixed editing and broadcasting module is used for editing and outputting continuous live broadcast recording and broadcasting mixed streams according to the recording and broadcasting media resource video fragments and live broadcast stream buffer fragments and the stipulated time, place and sequence of the editing and broadcasting strategy;
the video stream transcoding module is used for reinitializing a decoder according to the video code stream information and the key frame information in the live broadcast recording and broadcasting mixed stream, transcoding the live broadcast recording and broadcasting mixed stream and outputting a video stream with unified code rate, resolution and key frame control parameters.
The embodiment of the invention also provides a direct recording and broadcasting video mixed arranging and broadcasting control method which is applied to the direct recording and broadcasting video mixed arranging and broadcasting control system and comprises the following steps:
s1, acquiring recorded related data by a ground platform of a broadcast control system, and transmitting the related data to a data security transmission module;
s2, the data security transmission module carries out security encryption transmission on the acquired related data; the related data comprises a live broadcast stream, recorded broadcast video, a editing and broadcasting strategy and a control instruction; the recorded broadcast video is converted into recorded broadcast media resource video slicing information and transmitted to a video mixed editing and broadcasting module;
s3, according to the live broadcast stream sent by the data security transmission module, the live broadcast stream caching module outputs live broadcast stream caching fragmentation information and transmits the live broadcast stream caching fragmentation information to the video mixed editing and broadcasting module;
s4, the video mixed editing and broadcasting module is used for editing and outputting continuous live broadcast recorded and broadcast mixed streams according to the recorded and broadcast media resource video slicing information and live broadcast stream cache slicing information and the specified time, place and sequence of the editing and broadcasting strategy, and transmitting the live broadcast recorded and broadcast mixed streams to the video stream transcoding module;
s5, the video stream transcoding module reinitializes a decoder according to the video code stream information and the key frame information in the live broadcast recording and broadcasting mixed stream, transcodes the live broadcast recording and broadcasting mixed stream and outputs the video stream with unified code rate, resolution and key frame control parameters to the set top box.
Further, the data security transmission module in step S2 performs security encryption transmission on the acquired related data by using a dynamically encrypted Virtual Private Network (VPN).
Further, the step S4 includes:
s41, generating a first data result according to the recorded and broadcast media asset video slicing information; generating a second data result according to the live stream cache fragment information;
s42, taking the first data result and the second data result as input, calculating through a sequence arrangement algorithm, a time arrangement algorithm, a place arrangement algorithm and a PIS station report arrangement algorithm, and combining a matching rule selection algorithm to output selected video fragment information;
s43, outputting continuous live broadcast recorded broadcast mixed streams according to the selected video fragment information and the arrangement algorithm service, and transmitting the live broadcast recorded broadcast mixed streams to the video stream transcoding module.
Further, the matching rule selection algorithm in step S42 is obtained by:
s421, time information is acquired by timing service, and PIS station reporting information is acquired by PIS station reporting data receiving service; performing arrangement rule calculation on the time information and the PIS station reporting information to generate rules to be matched;
s422, carrying out arrangement core scheduling on the play arrangement rule library and the rules to be matched to generate an arrangement rule matching result; the play arrangement rule base is generated according to the editing and broadcasting strategy;
s423, matching the arrangement rule, and generating a matching rule selection algorithm according to the arrangement algorithm service.
Further, the outputting the continuous live recording and broadcasting mixed stream in step S43 includes:
when the selected video slicing information is the first slicing of the recording and broadcasting medium, setting a program conversion mark in the slicing, and inserting the program conversion mark into a mixed-editing stream slicing list;
when the selected video slicing information is the first live video slicing, setting a live video marker by slicing, and inserting the live video marker into the mixed-editing streaming slicing list;
and connecting the mixed stream fragment list with a mixed stream program output interface to output continuous live broadcast recorded broadcast video streams.
Further, the step S5 includes:
s51, reading mixed-coded fragment information in the live broadcast recorded broadcast mixed-stream program list through a mixed-coded stream program output interface, and re-acquiring video code stream information and key frame information according to a program change mark of each fragment;
s52, re-initializing decoder parameters according to the re-acquired video code stream information and key frame information, and re-decoding the video frame data by the re-initialized decoder;
s53, uniformly adjusting the resolution size of the video through a video filter by using the decoded video frame data;
s54, the video frame data after unified adjustment is input to an initialized encoder for encoding, and video streams with unified code rate, resolution and key frame control parameters are output to the set top box.
Further, the step S52 includes:
s521, detecting a program change mark according to the re-acquired video code stream information and key frame information, outputting a first fragment after the program change, and re-initializing a decoder;
s522, detecting a live broadcast sign, outputting a first live broadcast fragment and reinitializing the decoder on the basis of the step S521;
and S523, decoding the video slices through the initialized decoder, and re-decoding the video frame data.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
the embodiment of the invention provides a direct recording and broadcasting video mixed arranging and broadcasting control system, which comprises the following steps: the system comprises a data safety transmission module, a live stream buffer module, a video mixed editing and broadcasting module and a video stream transcoding module. The data security transmission module is used for performing security encryption transmission on the acquired related data; converting the recorded broadcast video into recorded broadcast media resource video fragments; the live stream caching module is used for caching live stream video clips according to live streams; the video mixed editing and broadcasting module is used for editing and outputting continuous live broadcast recording and broadcasting mixed streams according to the set time, place and sequence of the editing and broadcasting strategy according to the video fragments of the recording and broadcasting media materials and the live broadcast stream buffer fragments; the video stream transcoding module is used for reinitializing the decoder according to the video code stream information and the key frame information in the live broadcast recording and broadcasting mixed stream, transcoding the live broadcast recording and broadcasting mixed stream and outputting a video stream with unified code rate, resolution and key frame control parameters. The system ensures that an operator can update the media content timely, efficiently and safely only by focusing on the auditing of the media content and the arrangement of the program playing strategy under the condition that the television screen hardware does not make any change, and the updated media content and the playing strategy are put on the television screen in real time, so that the investment of manpower and material resources for updating the media is reduced. The method can update the content of the media resource in real time, reduce the investment of manpower and material resources for updating the media resource, improve the safety of the media resource transmission process and reduce the occurrence of safety production accidents.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
fig. 1 is a schematic flow chart of a dynamic encryption VPN tunnel adopted by a data security transmission module according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a video mixed editing and broadcasting module according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a video stream transcoding module according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a system architecture of a video mixed editing and playing control system for direct recording and playing according to an embodiment of the present invention;
fig. 5 is a flowchart of a method for controlling mixed editing and playing of a direct recording video according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Example 1
The embodiment of the invention provides a direct recording and broadcasting video mixed arranging and broadcasting control system, which comprises the following steps: the system comprises a data safety transmission module, a live stream buffer module, a video mixed editing and broadcasting module and a video stream transcoding module;
the data security transmission module is used for performing security encryption transmission on the acquired related data; the related data comprises live broadcast stream, recorded video, editing and broadcasting strategy and control instruction; converting the recorded broadcast video into recorded broadcast media resource video fragments;
the live stream buffer module is used for receiving the live stream sent by the data security transmission module and buffering live stream video fragments according to the live stream;
the video mixed editing and broadcasting module is used for editing and outputting continuous live broadcast recording and broadcasting mixed streams according to the set time, place and sequence of the editing and broadcasting strategy according to the video fragments of the recording and broadcasting media materials and the live broadcast stream buffer fragments;
the video stream transcoding module is used for reinitializing the decoder according to the video code stream information and the key frame information in the live broadcast recording and broadcasting mixed stream, transcoding the live broadcast recording and broadcasting mixed stream and outputting a video stream with unified code rate, resolution and key frame control parameters.
The direct recording broadcast video mixed arrangement broadcast control system provided by the embodiment can realize uninterrupted high-quality broadcast of live broadcast and vehicle-mounted programs in any broadcast environment, effectively transmits live broadcast stream contents to a train television terminal, and can adapt to real-time switching of broadcast vehicle-mounted contents in places with poor network transmission quality and buffer of the live broadcast stream contents under the condition of better network environment. The method realizes automatic and safe and timely updating and downloading of the media asset content and the media asset playing arrangement strategy, and real-time video streams which can be played by the output television screen are arranged in real time according to the media asset content and the playing arrangement strategy. And the manpower and material resources investment for updating the media resources can be reduced, the safety of the media resource transmission process is improved, and the occurrence of safety production accidents is reduced.
The following details the above modules by specific examples:
the embodiment provides a direct recording and broadcasting video mixed arranging and broadcasting control system applied to a high-speed rail television, which is used for solving the problems of long updating period, low updating efficiency and security holes of a television screen media resource program of a high-speed rail train. The direct recording and broadcasting video mixed arrangement and play control system provided by the embodiment is introduced to the VER entertainment controller server of the high-speed railway train, and under the condition that the hardware of the television screen of the high-speed railway train is ensured not to be changed, a high-speed railway television operator only needs to pay attention to the examination of video media information content and the arrangement of program media information strategies, so that the media information content can be updated timely, efficiently and safely, the updated media information content and the play strategies are put on the television screen of the high-speed railway train on time, the manpower and material resources for media information update are reduced, the safety of the media information transmission process is improved, and the safety production accidents are reduced.
Specifically, the direct recording and playing video mixed arranging and playing control system applied to the high-speed rail television provided by the embodiment comprises the following steps: the system comprises a data safety transmission module, a live stream buffer module, a video mixed editing and broadcasting module and a video stream transcoding module.
The data security transmission module is used for carrying out security encryption transmission on the received data. The data comprise related data such as media asset arrangement strategies (also called as editing and broadcasting strategies) of the high-speed rail television, video media asset content, control instructions, key data and the like. Wherein, the video media asset content includes: live streaming, video recording and playing. Referring to fig. 1, the data security transmission module uses a dynamic encrypted virtual private network tunnel VPN technology to perform basic encryption on all network communication data. The data encryption password adopts a dynamic random password based on a Google verification code generation technology, so that data is prevented from being intercepted and decrypted, the data is prevented from being tampered, and the consistency, the safety and the integrity of the data are ensured. And the video media asset fingerprint technology is adopted for downloading the received data, so as to verify the consistency and the integrity of the media asset file. Because the 4G/5G data network is unstable in the high-speed running process of the high-speed railway train, the conventional VPN software can be disconnected due to the weak network environment, and reconnection is required. The target system provided by the embodiment is a linux operating system, and provides a TUN/TAP virtual network equipment technology based on the operating system, and a KCP communication protocol is used as a basic protocol to develop a VPN capable of stably connecting a virtual private network tunnel in an unstable environment of a 4G/5G data network under high-speed running of a train. The VPN tunnel is suitable for the high-speed running environment of the high-speed railway train, and ensures stable transmission of high-speed running data of the high-speed railway train.
Further, the data security transmission module is in wireless connection with a high-speed rail television broadcast control system ground platform arranged at the far end, and the broadcast control system ground platform transmits related data such as a high-speed rail television media asset arrangement strategy, video media asset content, control instructions, key data and the like to the data security transmission module, and the data security transmission module receives the related data and transmits the related data to a subsequent module. The platform provides a management portal for uploading, auditing, programming and the like of media asset arrangement strategies, video media asset and other data for a high-speed television operator, stores media asset play arrangement strategy data and video media asset files, provides a safe media asset downloading and transmitting interface for the whole direct-recording video hybrid arrangement play control system, and provides interface data support.
Specifically, the media asset arrangement policy data is a set of data including time, place, sequence, media asset information, play control information, and the like for recording media asset play start time and play duration specified by the high-speed television operator. When the system is started, a media resource playing arrangement control strategy of the current train is requested from a server, media resource playing arrangement strategy data is generated according to strategy analysis and combination, and the media resource playing arrangement strategy data is provided for an arrangement algorithm to carry out media resource video fragment screening.
The live stream buffer module is used for buffering live stream video fragments, and guaranteeing that live stream video can be smoothly played under the condition of weak network or no network when the high-speed train runs at high speed. And recording the time information and the program information of each live stream segment, and providing the time information and the program information for an arrangement algorithm to screen live stream video segments to be output.
Specifically, the video mixed editing and broadcasting module is used for editing and outputting the live broadcast stream and the recorded broadcast video according to the time, place and sequence specified by the media resource editing strategy (editing and broadcasting strategy) to continuously output the live broadcast recorded broadcast mixed stream which meets the expectations of operators. Referring to fig. 2, the module is divided into two branches, and one branch performs arrangement rule calculation according to the current time and train running time acquired by the timing service and the PIS report information and other data acquired by the PIS report data receiving service to generate a rule to be matched; the other branch generates a play arrangement rule base according to the media asset arrangement policy. And (5) generating an arrangement rule matching result by the two branches of the arranged core scheduling service. And transmitting the arrangement rule matching result to an arrangement algorithm service, wherein the arrangement algorithm service outputs the media resource video fragments to be inserted according to the media resource video fragment information on one hand and the media resource type and the matching rule provided by the arrangement rule matching result on the other hand. Setting a program conversion mark for the first fragment in the media resource fragment array according to the condition that the first fragment is not the first fragment, and inserting a mixed-editing stream fragment list; and setting a live broadcast mark according to whether the first slice is the first slice of live broadcast, inserting a mixed stream slice list, connecting the mixed stream slice list with a mixed stream program output interface, and outputting continuous live broadcast recorded and broadcast video streams.
The video slicing information according to the media assets is obtained by the following two aspects: on one hand, video slicing information (namely, video slicing sequence, each slicing time length and slicing file names) of the on-demand media asset is output through analyzing a media asset arrangement strategy; on the other hand, the live stream cache fragmentation information is output through the live stream cache module. The two aspects are input into a sequence arrangement algorithm, a time arrangement algorithm, a place arrangement algorithm and a PIS station report arrangement algorithm together, and a matching rule selection algorithm provided by an arrangement algorithm service (generated by transmitting the matching result of the arrangement rule to the arrangement algorithm service) is combined to output selected fragment information, namely media resource video fragment information.
Specifically, the outputting the media resource video clips to be inserted, that is, selecting the clips to be output from the media resource video clip list, is: for recorded broadcast program transformation, setting a program change label (custom M3U8 TAG) for the first fragment; for converting a program into a live program, a live program TAG (custom M3U8 TAG) is set for the first segment of the live program, and the encoding service needs to reinitialize the decoder according to the custom program change and the live start TAG.
Specifically, the video stream transcoding module is configured to reinitialize the decoder according to the customized program change and the live broadcast start mark. The direct play of the live video and the recorded video or different recorded video can have the condition that the basic information such as code rate, resolution ratio and the like are inconsistent and the control parameters of the key frames of the video are inconsistent. The video stream transcoding module in the direct recording and broadcasting video mixed arranging and broadcasting control system provided by the embodiment can reinitialize the decoder according to the video code stream information and the key frame information, and referring to fig. 3, the video stream transcoding module firstly reads mixed encoding fragment information in a live recording and broadcasting mixed stream program list through a mixed encoding stream program output interface, and re-acquires the video code stream information and the key frame information according to a custom M3U8 TAG program switching mark, a program changing mark or a live broadcasting mark of each fragment, then re-initializes decoder parameters by using the new code stream information and the key frame information, ensures correct decoding of video data and audio data, uniformly adjusts the video resolution size through a size-adjusting video filter, finally, inputs the video frame data subjected to resolution adjustment to an initialized encoder for encoding, uniformly codes the video stream according with the code rate of the high-speed television standard, and outputs the video stream with the uniform data parameters.
Alternatively, the encoding of the mixed video stream may use an open source video processing framework such as ffmpeg, vlc, gstreamer, which is not limited in this embodiment. The method comprises the steps of adding analysis processing of custom M3U8 TAG and re-initialization of a decoder on the basis of an existing video processing frame, adding support for video source size dynamic change, dynamic detection and dynamic calculation to a video filter to carry out size adjustment, and selecting VLC as a basic video transcoding frame based on hardware configuration and software environment (VLC is installed) of a VER entertainment controller of a high-speed rail train in the embodiment, wherein the minimum change of the existing system is considered.
And finally, the video stream transcoding module broadcasts and transmits the uniformly coded video stream to the high-speed rail television set top box for live broadcast recording and broadcasting mixed video stream output.
The overall system architecture diagram of each module of the direct recording video mixed editing and playing control system provided in this embodiment is shown in fig. 4, firstly, a high-speed rail television operator transmits set media information editing strategies, video media information contents, control instructions and key data to a ground platform of the high-speed rail television playing control system, and the ground platform acquires related data such as recording video, editing and playing strategies, live streaming and control instructions and transmits the related data to a data security transmission module. The data security transmission module transmits the related data security encryption to the following module: transmitting the live stream to a live stream buffer module, and outputting live stream buffer fragments; and recording and broadcasting media asset video fragments according to the recorded and broadcasting video, and inputting the video fragments and the media asset arranging and broadcasting strategy obtained according to the editing and broadcasting strategy to a video mixed editing and broadcasting module. And secondly, the video mixed editing and broadcasting module outputs mixed editing video streams (namely live broadcast recording and broadcasting mixed streams) and inputs the mixed editing video streams to the video stream transcoding module. And finally, the video stream transcoding module outputs the transcoded video stream with unified code rate, resolution and key frame control parameters to the high-speed rail television set top box, and outputs the live broadcast recorded broadcast mixed video stream.
According to the direct recording and broadcasting video mixed arranging and broadcasting control system, dynamic encryption transmission of the data security transmission module improves the security of the media resource transmission process, the media resource transmission process is prevented from being tampered, the content broadcasted by the train television is checked and passed, and the security production accidents are reduced. The video stream transcoding module recodes the mixed video stream, ensures uninterrupted flow play of the video stream in the high-speed rail television, and solves the problems of long video play blocking or program transition switching time and poor user experience caused by introducing real-time live broadcast. The video stream after transcoding accords with the video coding standard of the television set top box of the high-speed rail train, so that the upgrading and reconstruction cost of the existing equipment caused by introducing a new technology is reduced.
Two specific practical examples are provided below:
example one:
under the scene of a high-speed rail train re-entertaining number train, a direct recording and broadcasting video mixed arranging and broadcasting control system is deployed on a VER entertainment control system server of the train, a specified system network is configured to use a train seat display Internet of things train ground communication channel, video content is played on a television screen on the re-entertaining number train, a live video stream is introduced on the basis of the original recording and broadcasting video, timely and efficient update of media resource content is ensured, safe and reliable transmission of the media resource content is realized, and other transformation is not needed.
Example two:
the second embodiment is different from the first embodiment in that the operation system of the direct recording and playing video mixed editing and playing control system is different, and the second embodiment is operated in an android intelligent system.
Under the platform scene of the high-speed rail station, the direct recording and broadcasting video mixed arrangement and broadcasting control system is deployed in the intelligent screen equipment system in the high-speed rail station, and the existing 4G/5G Internet of things channel or WIFI network channel of the intelligent screen equipment is used, so that the introduction of the video content broadcast by the intelligent screen equipment of the platform into the live video stream can be realized, the timely and efficient update of the media content is ensured, the safe and reliable transmission of the media content is realized, and other transformation is not needed.
The two practical application examples can replace automatic real-time or quasi-real-time update by utilizing the existing network channel in different scenes on the basis of the current periodical manual update media resource mode, and add live streaming media resources into media resource contents. After the video media information content and the media information arrangement strategy are automatically downloaded from the ground platform of the high-speed rail television control system through the data security transmission module, the video information content and the arrangement strategy are subjected to security integrity verification, the video information is arranged in real time through the video mixed arrangement module, the arranged video stream is output in real time, the video mixed arrangement module carries out real-time coding on the video stream simultaneously containing a plurality of recorded broadcast contents and live broadcast contents, the video stream conforming to the existing specification of the high-speed rail television is output, and the video stream which is mixed-coded can be played by the television screen hardware of the high-speed rail train under the condition of not changing any. After the direct recording and broadcasting video mixed arrangement and play control system is introduced, a high-speed railway operator can update the media content timely, efficiently and safely only by focusing on the auditing of the media content and the arrangement of the program play strategy, and a large amount of manpower and material resources are saved.
Example 2
Based on the same inventive concept, the embodiment of the present invention further provides a method for controlling mixed programming and playing of a direct recording and playing video, which is applied to the system for controlling mixed programming and playing of a direct recording and playing video according to the foregoing embodiment, and referring to fig. 5, the method includes the following steps:
s1, acquiring recorded related data by a ground platform of a broadcasting control system, and transmitting the related data to a data security transmission module;
s2, the data security transmission module carries out security encryption transmission on the acquired related data; the related data comprises live broadcast stream, recorded video, editing and broadcasting strategy and control instruction; converting the recorded broadcast video into recorded broadcast media information video slicing information, and transmitting the video slicing information to a video mixed editing and broadcasting module;
s3, according to the live stream sent by the data security transmission module, the live stream caching module outputs live stream caching fragment information and transmits the live stream caching fragment information to the video mixed editing and broadcasting module;
s4, the video mixed editing and broadcasting module is used for editing and outputting continuous live broadcast recorded and broadcast mixed streams according to the recorded and broadcast media information video slicing information and live broadcast stream buffer slicing information, and according to the specified time, place and sequence of an editing and broadcasting strategy, and transmitting the live broadcast recorded and broadcast mixed streams to the video stream transcoding module;
s5, the video stream transcoding module reinitializes the decoder according to the video code stream information and the key frame information in the live broadcast recording and broadcasting mixed stream, transcodes the live broadcast recording and broadcasting mixed stream and outputs the video stream with uniform code rate, resolution and key frame control parameters to the set top box.
Because the method is applied to the direct recording and playing video mixed arranging and playing control system, the implementation of the method can be referred to the implementation of the system, and the repetition is omitted.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the method disclosed in the embodiment, since the method is applied to the system disclosed in the embodiment, the description is simpler, and the relevant points are referred to the description of the system part.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (6)
1. A direct-recording video mixed programming play control system, comprising: the system comprises a data safety transmission module, a live stream buffer module, a video mixed editing and broadcasting module and a video stream transcoding module;
the data security transmission module is used for performing security encryption transmission on the acquired related data; the related data comprises a live broadcast stream, recorded broadcast video, a editing and broadcasting strategy and a control instruction; converting the recorded broadcast video into recorded broadcast media resource video fragments;
the live stream caching module is used for receiving the live stream sent by the data security transmission module and caching live stream video clips according to the live stream;
the video mixed editing and broadcasting module is used for editing and outputting continuous live broadcast recording and broadcasting mixed streams according to the recording and broadcasting media resource video fragments and live broadcast stream buffer fragments and the stipulated time, place and sequence of the editing and broadcasting strategy;
the method comprises the following steps:
generating a first data result according to the video slicing information of the recording and broadcasting media asset; generating a second data result according to the live stream cache fragment information;
taking the first data result and the second data result as input, calculating through a sequence arrangement algorithm, a time arrangement algorithm, a place arrangement algorithm and a PIS station report arrangement algorithm, and combining a matching rule selection algorithm to output selected video fragment information;
outputting continuous live broadcast recorded broadcast mixed streams according to the selected video slicing information and the arrangement algorithm service, and transmitting the live broadcast recorded broadcast mixed streams to the video stream transcoding module;
the matching rule selection algorithm is obtained by the following steps:
s421, time information is acquired by timing service, and PIS station reporting information is acquired by PIS station reporting data receiving service; performing arrangement rule calculation on the time information and the PIS station reporting information to generate rules to be matched;
s422, carrying out arrangement core scheduling on the play arrangement rule library and the rules to be matched to generate an arrangement rule matching result; the play arrangement rule base is generated according to the editing and broadcasting strategy;
s423, matching the arrangement rule, and generating a matching rule selection algorithm according to the arrangement algorithm service;
transmitting the matching result of the arrangement rule to an arrangement algorithm service, wherein the arrangement algorithm service outputs the media resource video fragment to be inserted according to the media resource video fragment information on one hand and the media resource type and the matching rule provided by the matching result of the arrangement rule on the other hand;
the video stream transcoding module is used for reinitializing a decoder according to the video code stream information and the key frame information in the live broadcast recording and broadcasting mixed stream, transcoding the live broadcast recording and broadcasting mixed stream and outputting a video stream with unified code rate, resolution and key frame control parameters.
2. The method for controlling the mixed programming and playing of the direct recording and playing video is characterized by being applied to the mixed programming and playing control system of the direct recording and playing video as claimed in claim 1, and comprising the following steps:
s1, acquiring recorded related data by a ground platform of a broadcast control system, and transmitting the related data to a data security transmission module;
s2, the data security transmission module carries out security encryption transmission on the acquired related data; the related data comprises a live broadcast stream, recorded broadcast video, a editing and broadcasting strategy and a control instruction; the recorded broadcast video is converted into recorded broadcast media resource video slicing information and transmitted to a video mixed editing and broadcasting module;
s3, according to the live broadcast stream sent by the data security transmission module, the live broadcast stream caching module outputs live broadcast stream caching fragmentation information and transmits the live broadcast stream caching fragmentation information to the video mixed editing and broadcasting module;
s4, the video mixed editing and broadcasting module is used for editing and outputting continuous live broadcast recorded and broadcast mixed streams according to the recorded and broadcast media resource video slicing information and live broadcast stream cache slicing information and the specified time, place and sequence of the editing and broadcasting strategy, and transmitting the live broadcast recorded and broadcast mixed streams to the video stream transcoding module;
the step S4 includes:
s41, generating a first data result according to the recorded and broadcast media asset video slicing information; generating a second data result according to the live stream cache fragment information;
s42, taking the first data result and the second data result as input, calculating through a sequence arrangement algorithm, a time arrangement algorithm, a place arrangement algorithm and a PIS station report arrangement algorithm, and combining a matching rule selection algorithm to output selected video fragment information;
s43, outputting continuous live broadcast recorded broadcast mixed streams according to the selected video fragment information and the arrangement algorithm service, and transmitting the live broadcast recorded broadcast mixed streams to the video stream transcoding module;
the matching rule selection algorithm in step S42 is obtained by the following steps:
s421, time information is acquired by timing service, and PIS station reporting information is acquired by PIS station reporting data receiving service; performing arrangement rule calculation on the time information and the PIS station reporting information to generate rules to be matched;
s422, carrying out arrangement core scheduling on the play arrangement rule library and the rules to be matched to generate an arrangement rule matching result; the play arrangement rule base is generated according to the editing and broadcasting strategy;
s423, matching the arrangement rule, and generating a matching rule selection algorithm according to the arrangement algorithm service;
transmitting the matching result of the arrangement rule to an arrangement algorithm service, wherein the arrangement algorithm service outputs the media resource video fragment to be inserted according to the media resource video fragment information on one hand and the media resource type and the matching rule provided by the matching result of the arrangement rule on the other hand;
s5, the video stream transcoding module reinitializes a decoder according to the video code stream information and the key frame information in the live broadcast recording and broadcasting mixed stream, transcodes the live broadcast recording and broadcasting mixed stream and outputs the video stream with unified code rate, resolution and key frame control parameters to the set top box.
3. The method of claim 2, wherein the data secure transmission module in step S2 uses a dynamically encrypted Virtual Private Network (VPN) to perform secure encrypted transmission on the acquired related data.
4. The method for controlling mixed programming and playing of direct-recording video according to claim 2, wherein the outputting of the continuous mixed live-recording stream in step S43 comprises:
when the selected video slicing information is the first slicing of the recording and broadcasting medium, setting a program conversion mark in the slicing, and inserting the program conversion mark into a mixed-editing stream slicing list;
when the selected video slicing information is the first live video slicing, setting a live video marker by slicing, and inserting the live video marker into the mixed-editing streaming slicing list;
and connecting the mixed stream fragment list with a mixed stream program output interface to output continuous live broadcast recorded broadcast video streams.
5. The method for controlling mixed programming and playing of video-on-demand according to claim 2, wherein the step S5 comprises:
s51, reading mixed-coded fragment information in the live broadcast recorded broadcast mixed-stream program list through a mixed-coded stream program output interface, and re-acquiring video code stream information and key frame information according to a program change mark of each fragment;
s52, re-initializing decoder parameters according to the re-acquired video code stream information and key frame information, and re-decoding the video frame data by the re-initialized decoder;
s53, uniformly adjusting the resolution size of the video through a video filter by using the decoded video frame data;
s54, the video frame data after unified adjustment is input to an initialized encoder for encoding, and video streams with unified code rate, resolution and key frame control parameters are output to the set top box.
6. The method for controlling mixed programming and playing of video-on-demand according to claim 5, wherein the step S52 comprises:
s521, detecting a program change mark according to the re-acquired video code stream information and key frame information, outputting a first fragment after the program change, and re-initializing a decoder;
s522, detecting a live broadcast sign, outputting a first live broadcast fragment and reinitializing the decoder on the basis of the step S521;
and S523, decoding the video slices through the initialized decoder, and re-decoding the video frame data.
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