CN113810741A - Direct recording playing video mixed editing playing control system and method - Google Patents
Direct recording playing video mixed editing playing control system and method Download PDFInfo
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Abstract
The invention discloses a mixed editing and playing control system and method for direct recording and playing videos, wherein the system comprises the following steps: the device comprises a data security transmission module, a live broadcast stream cache module, a video mixing editing and playing module and a video stream transcoding module. The data security transmission module is used for carrying out security encryption transmission on related data and converting recorded and broadcast videos into recorded and broadcast media resource video fragments; the live stream caching module is used for caching live stream video fragments according to the live stream; the video mixing editing and broadcasting module is used for editing and outputting continuous live broadcast recorded broadcast mixed streams according to editing and broadcasting strategies according to recorded broadcast media video clips and live broadcast stream cache clips; and the video stream transcoding module is used for reinitializing the decoder according to the live broadcast and recorded broadcast mixed stream, transcoding the live broadcast and recorded broadcast mixed stream and outputting a video stream with uniform code rate, resolution and key frame control parameters. The method can update the media asset content in real time, reduce the 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 video mixed editing and playing control system and a direct recording video mixed editing and playing control method.
Background
Video playing gradually becomes an indispensable media asset propagation carrier in daily life of people. At present, the novel multifunctional shoe pad is more and more applied to daily work and life and gradually becomes a main transmission port for people to dispatch and relax daily.
The high-speed rail video is a main window for passenger service and railway propaganda of a high-speed rail train, and is an important platform for fusion output of railway audio-visual contents in a novel media channel. At present, after the video content played by a television of a high-speed train passes the manual arrangement and verification, the video content is manually copied into a hard disk of a VER entertainment control system of the train when the train enters a bullet train for power-on maintenance through media such as a U disk and the like. Open-source video transcoding software ffmpeg, vlc, gstreamer and the like directly transcode the video stream mixed with live broadcast, recorded and broadcast, and the problems of blockage, screen splash, green screen and the like of the output video stream after transcoding exist.
At present, video contents played by a television of a high-speed train are manually copied to a hard disk of a VER entertainment control system of the train in a mode that the video contents are manually copied to the hard disk of the train when the train enters a bullet train for maintenance through media such as a U disk after being manually arranged and audited, so that the following problems to be solved exist:
(1) the media asset content is not updated timely, the updating period 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 updating period of the media assets, and the problem of untimely updating exists.
(2) The updating efficiency is low, and the updating can be copied one by one only when the whole train in the motor train is powered on manually, so that a large amount of manpower, material resources and electric power are consumed.
(3) And in the updating process, a plurality of security holes for tampering and replacing the video media assets exist, and in the period from the time when the media asset is approved to the time when the media asset is copied to a VER entertainment controller hard disk of the train, the media assets such as a transmission medium U disk and the like have security holes for tampering, replacing or inserting other media assets. In the process, the safety awareness of workers is realized, the requirements on the working process are extremely high, and production safety accidents can happen due to slight negligence.
Therefore, how to provide a system and a method for controlling mixed editing and playing of live-recorded video on the basis of 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 system and a method for controlling mixed editing and playing of direct recording and playing video, which at least solve some of the above technical problems, and can update media content in real time, reduce the manpower and material resources investment for updating media, improve the security of the media 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 system comprises a data security transmission module, a live broadcast stream cache module, a video mixing 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 acquired related data; the related data comprises live streaming, recorded and broadcast videos, editing and broadcasting strategies and control instructions; converting the recorded and broadcast video into recorded and broadcast media asset 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 fragments according to the live stream;
the video mixed editing and broadcasting module is used for editing and outputting continuous live broadcast recorded broadcast mixed streams according to the recorded broadcast media asset video fragments and the live broadcast stream cache fragments and the specified time, place and sequence of the editing and broadcasting strategy;
and 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 and recorded broadcast mixed stream, transcoding the live broadcast and recorded broadcast 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 broadcast video mixed arranging and playing control method, which is applied to the direct recording broadcast video mixed arranging and playing control system and comprises the following steps:
s1, the ground platform of the broadcast control system acquires the recorded related data and transmits the related data to the data security transmission module;
s2, the data security transmission module performs security encryption transmission on the acquired related data; the related data comprises live streaming, recorded and broadcast videos, editing and broadcasting strategies and control instructions; converting the recorded and broadcast video into recorded and broadcast media asset video fragment information, and transmitting the recorded and broadcast media asset video fragment information to a video mixing editing and broadcasting module;
s3, according to the live stream sent by the data security transmission module, the live stream cache module outputs live stream cache fragmentation information and transmits the information to the video mixing editing and broadcasting module;
s4, the video mixing editing and broadcasting module arranges and outputs continuous live broadcast recorded broadcast mixed stream according to the recorded broadcast media resource video fragment information and the live broadcast stream cache fragment information and the specified time, place and sequence of the editing and broadcasting strategy, and transmits the live broadcast recorded broadcast mixed stream to the video stream transcoding module;
and 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, recorded and broadcast mixed stream, transcodes the live broadcast, recorded and broadcast mixed stream and outputs the video stream with uniform code rate, resolution and key frame control parameters to the set top box.
Further, in step S2, the data security transmission module performs security encryption transmission on the acquired related data by using a dynamic encrypted virtual private network tunnel VPN.
Further, the step S4 includes:
s41, generating a first data result according to the recorded and broadcast media asset video slicing information; caching the slicing information according to the live streaming to generate a second data result;
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 (picture information system) station reporting arrangement algorithm, and outputting selected video fragment information by combining a matching rule selection algorithm;
and S43, outputting continuous live broadcast recorded broadcast mixed stream according to the selected video slicing information and the service of the editing algorithm, and transmitting the live broadcast recorded broadcast mixed stream to the video stream transcoding module.
Further, the matching rule selection algorithm in step S42 is obtained by:
s421, acquiring time information by a timing service, and acquiring PIS station reporting information by a PIS station reporting data receiving service; performing arrangement rule calculation on the time information and the PIS station reporting information to generate a rule to be matched;
s422, performing arrangement core scheduling on the playing arrangement rule base and the rule to be matched to generate an arrangement rule matching result; the playing and arranging rule base is generated according to the arranging and playing strategy;
and S423, generating a matching rule selection algorithm according to the arrangement algorithm service by using the arrangement rule matching result.
Further, the outputting of the continuous live recorded and broadcast mixed stream in step S43 includes:
when the selected video fragment information is the first fragment of the recorded and played media resources, setting a program conversion mark for the fragment, and inserting the program conversion mark into a mixed stream fragment list;
when the selected video fragment information is the first fragment of live broadcast, setting a live broadcast mark for the fragment, and inserting the live broadcast mark into the mixed editing stream fragment list;
and connecting the mixed stream slice list with a mixed stream program output interface to output continuous live broadcast recorded broadcast video stream.
Further, the step S5 includes:
s51, reading the mixed-encoding slice information in the live-broadcast recorded-broadcast mixed stream program list through a mixed-encoding stream program output interface, and re-acquiring video code stream information and key frame information according to the program change mark of each slice;
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 video resolution size of the decoded video frame data through a video filter;
and S54, inputting the uniformly adjusted video frame data to the initialized encoder for encoding, and outputting the video stream with uniform code rate, resolution and key frame control parameters to the set-top box.
Further, the step S52 includes:
s521, detecting a program change mark according to the video code stream information and the key frame information which are acquired again, outputting a first fragment after the program is changed, and re-initializing a decoder;
s522, on the basis of the step S521, detecting a live broadcast mark, outputting a live broadcast first segment, and re-initializing the decoder;
s523, decoding the video slice by 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 device comprises a data security transmission module, a live broadcast stream cache module, a video mixing editing and playing module and a video stream transcoding module. The data security transmission module is used for carrying out security encryption transmission on the acquired related data; converting the recorded and played video into recorded and played media asset video fragments; the live stream caching module is used for caching live stream video fragments according to the live stream; the video mixing editing and broadcasting module is used for editing and outputting continuous live broadcast recorded broadcast mixed streams according to the video fragments of the recorded broadcast media and the cache fragments of the live broadcast streams and the specified time, place and sequence of the editing and broadcasting strategy; 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 and recorded broadcast mixed stream, transcoding the live broadcast and recorded broadcast mixed stream and outputting the video stream with unified code rate, resolution and key frame control parameters. The system ensures that an operator can update the media resource content timely, efficiently and safely only by paying attention to the auditing of the media resource content and the arrangement of the program playing strategy under the condition that television screen hardware is not changed, and the updated media resource 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 resource is reduced. The method can update the media resource content in real time, reduce the manpower and material resources investment 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 hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic flow chart of a dynamic encryption VPN tunnel used by a data security transmission module according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a video mixing editing and playing module according to an embodiment of the present invention;
fig. 3 is a schematic flowchart of a video stream transcoding module according to an embodiment of the present invention;
fig. 4 is a schematic system architecture diagram of a direct-recording-playing video hybrid editing and playing control system according to an embodiment of the present invention;
fig. 5 is a flowchart of a mixed editing and playing control method for live-recorded 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 system comprises a data security transmission module, a live broadcast stream cache module, a video mixing 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 acquired related data; the related data comprises live streaming, recorded and broadcast videos, editing and broadcasting strategies and control instructions; converting the recorded and played video into recorded and played media asset 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 fragments according to the live stream;
the video mixing editing and broadcasting module is used for editing and outputting continuous live broadcast recorded broadcast mixed streams according to the video fragments of the recorded broadcast media and the cache fragments of the live broadcast streams and the specified time, place and sequence of the editing and broadcasting strategy;
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 and recorded broadcast mixed stream, transcoding the live broadcast and recorded broadcast mixed stream and outputting the video stream with unified code rate, resolution and key frame control parameters.
The mixed editing and playing control system for the live-recorded broadcast video can realize uninterrupted high-quality broadcast of live broadcast and vehicle-mounted programs in any playing environment, effectively transmit live broadcast stream contents to the train television terminal, adapt to real-time switching and playing of vehicle-mounted contents in places with poor network transmission quality and cache the live broadcast stream contents in the case of excellent network environment. The method realizes the automatic, safe and timely updating of the downloaded media asset content and the media asset playing and arranging strategy, and arranges and outputs the real-time video stream which can be played by the television screen in real time according to the media asset content and the playing and arranging strategy. And the investment of manpower and material resources 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 above modules are explained in detail by specific embodiments below:
the embodiment provides a direct-recording and broadcasting video mixed arranging and broadcasting control system applied to a high-speed rail television, and aims to solve the problems of long updating period, low updating efficiency and security loopholes of a television screen of a high-speed rail train. The direct recording and broadcasting video mixed arranging and broadcasting control system provided by the embodiment is introduced into a VER entertainment controller server of a high-speed train, and under the condition that hardware of a television screen of the high-speed train is not changed, a high-speed train television operator only needs to pay attention to auditing of video media resource content and arranging of a program media resource strategy, so that the media resource content can be updated timely, efficiently and safely, the updated media resource content and the broadcasting strategy are put on the television screen of the high-speed train on time, manpower and material resources for updating the media resource are reduced, the safety of a media resource transmission process is improved, and safety production accidents are reduced.
Specifically, the system for controlling mixed editing and playing of direct-recording and video playing applied to a high-speed television provided by this embodiment includes: the device comprises a data security transmission module, a live broadcast stream cache module, a video mixing editing and playing module and a video stream transcoding module.
Specifically, the data security transmission module is configured to perform security encryption transmission on the received data. The data comprises related data such as a media asset arranging strategy (also called an arranging and broadcasting strategy) of the high-speed rail television, video media asset content, control instructions, key data and the like. Wherein, the video media resource content comprises: live streaming, recorded video. Referring to fig. 1, the data security transmission module adopts a dynamic encryption 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 Google verification code generation technology, so that data is prevented from being intercepted and decrypted, data is prevented from being tampered, and the consistency, safety and integrity of the data are guaranteed. And downloading the received data by adopting a video asset fingerprint technology for verifying the consistency and the integrity of the asset file. Due to the fact that the 4G/5G data network is unstable in the high-speed running process of the high-speed train, the conventional VPN software is disconnected due to the fact that weak network environment occurs, and reconnection is needed. The target system provided by the embodiment is a linux operating system, the TUN/TAP virtual network device technology based on the operating system is provided, and a KCP communication protocol is used as a basic protocol to develop a Virtual Private Network (VPN) capable of being stably connected in a 4G/5G data network unstable environment in high-speed train operation. The VPN tunnel is suitable for a high-speed running environment of the high-speed train, and stable transmission of high-speed running data of the high-speed train is guaranteed.
Furthermore, the data security transmission module is wirelessly connected with a high-speed rail television broadcast control system ground platform arranged at a far end, the broadcast control system ground platform transmits related data such as a media asset arrangement strategy, video media asset content, a control instruction and key data of the high-speed rail television 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 management entries for uploading, auditing, programming and the like of data such as a media asset programming strategy and video media assets and the like for a high-speed television operator, stores media asset playing and programming strategy data and video media asset files, provides a safe media asset downloading and transmitting interface for the whole direct-recording and broadcasting video mixing and programming control system, and provides interface data support for the support background of the direct-recording and broadcasting video mixing and programming control system provided by the embodiment.
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 the play start time and play duration of the media asset specified by the high-speed television operator. When the system is started, a media asset playing and arranging control strategy of the current train is requested from the server side, and media asset playing and arranging strategy data is generated according to strategy analysis combination and provided for an arranging algorithm to carry out media asset video slicing and screening.
Specifically, the live streaming caching module is used for caching live streaming video fragments, and the live streaming video can be smoothly played under the condition of weak network or no network when the high-speed train runs at a 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 the arrangement algorithm to screen the live stream video segments needing to be output.
Specifically, the video mixing editing and playing module is configured to edit and output a live broadcast, recorded broadcast and recorded broadcast video according to the time, place and sequence specified by the media asset editing policy (editing and playing policy) and a continuous live broadcast, recorded broadcast and recorded broadcast mixed stream meeting the expectation of an operator. Referring to fig. 2, the module is divided into two branches, one branch performs arrangement rule calculation according to data such as current time and train running time acquired by a timing service, and PIS stop reporting information acquired by a PIS stop reporting data receiving service, and generates a rule to be matched; the other branch generates a playing and arranging rule base according to the media asset arranging strategy. The two branches are subjected to scheduling service of the scheduling core to generate a matching result of the scheduling rule. And transmitting the arrangement rule matching result to an arrangement algorithm service, wherein the arrangement algorithm service outputs the media resource video fragments needing to be inserted according to the media resource video fragment information on one hand and the media resource types and the matching rules provided by the arrangement rule matching result on the other hand. Setting a program transformation mark for the fragment according to whether the fragment is the first fragment in the media asset fragment array, and inserting the program transformation mark into a mixed editing stream fragment list; and setting a live broadcast mark according to whether the live broadcast start segment is the first segment at the beginning of live broadcast, inserting a mixed stream segment list, connecting the mixed stream segment list with a mixed stream program output interface, and outputting a continuous live broadcast recorded video stream.
The above-mentioned video slicing information according to the media asset is obtained by the following two aspects: on one hand, the on-demand asset video slicing information (namely the video slicing sequence of the recorded and played asset, the time length of each slicing and the name of a slicing file) is output by analyzing the asset arranging strategy; on the other hand, the slicing information is cached through the live streaming output by the live streaming caching module. The two aspects are jointly input into a sequence arrangement algorithm, a time arrangement algorithm, a place arrangement algorithm and a PIS (picture information system) station reporting arrangement algorithm, a matching rule selection algorithm (generated by transmitting the arrangement rule matching result to an arrangement algorithm service) provided by an arrangement algorithm service is combined, and selected fragment information, namely media asset video fragment information, is output.
Specifically, the above outputting the asset video clips that need to be inserted, that is, selecting the clips to be output from the asset video clip list, is: for recorded program conversion, setting a program change label (self-defined M3U8 TAG) for the first segment; for the program conversion to live program, setting a live program label (self-defined M3U8 TAG) for the first segment of live program, and the coding service needs to reinitialize the decoder according to the self-defined program change and the live program start mark.
Specifically, the video stream transcoding module is configured to reinitialize the decoder according to the customized program change and the live start flag. The direct playing of the live video and the recorded and broadcast video or different recorded and broadcast videos can cause the conditions of inconsistent basic information such as code rate, resolution ratio and the like and inconsistent control parameters of video key frames. Referring to fig. 3, a video stream transcoding module in the mixed editing and playing control system for direct recording and playing video provided in this embodiment may reinitialize a decoder according to video stream information and key frame information, first read mixed encoding segment information in a mixed program list for direct recording and playing through a mixed encoding stream program output interface, and reacquire video stream information and key frame information according to a custom M3U8 TAG program switching flag, a program change flag, or a direct broadcast flag of each segment, then reinitialize decoder parameters using new stream information and key frame information to ensure that video data and audio data are correctly decoded, and the decoded video frame data is subjected to a size adjustment video filter to uniformly adjust the video resolution, and finally input the video frame data subjected to resolution adjustment to the initialized encoder to encode, unifying the code rate, and outputting the video stream of which the data unifies the code rate parameters and which accords with the high-speed rail television standard.
Alternatively, the hybrid video stream may be encoded using a video processing framework such as ffmpeg, vlc, gstreamer, etc., which is not limited in this embodiment. The method is characterized in that the parsing processing of a user-defined M3U8 TAG and the reinitialization of a decoder are added on the basis of the existing video processing framework, the size adjustment is carried out on the basis of the video filter by aiming at the dynamic change support, the dynamic detection and the dynamic calculation of the size of a video source, and the VLC is selected as the video transcoding framework based on the hardware configuration and the software environment (the VLC is installed) of the VER entertainment controller of the high-speed rail train.
Further, the video stream transcoding module finally transmits the video stream broadcast after unified coding to a high-speed television set top box for live broadcast, recorded broadcast, mixed-coded video stream output.
Referring to fig. 4, an overall system architecture diagram of each module of the direct-recording and broadcasting video mixed editing and playing control system provided in this embodiment is shown, first, a high-speed television operator transmits a set media asset editing strategy, video media asset content, a control instruction and key data to a high-speed television broadcasting and controlling system ground platform, and the ground platform acquires related data of a recorded and broadcasting video, an editing and broadcasting strategy, a live broadcast stream, a control instruction and the like and transmits the related data to a data security transmission module. The data security transmission module is used for transmitting the related data security encryption to a subsequent module: the live stream is transmitted to a live stream caching module, and live stream caching fragments are output; and performing recorded broadcast of media asset video fragmentation according to the recorded broadcast video, and inputting the media asset video fragmentation and the media asset arranging and playing strategy obtained according to the arranging and playing strategy to the video mixed arranging and playing module together. And secondly, the video mixing and editing module outputs a mixing and editing video stream (namely a live broadcasting and recorded broadcasting mixed stream) and inputs the mixing and editing video stream 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 television set top box and outputs the live broadcast, recorded broadcast and mixed-coded video stream.
According to the mixed arranging and playing control system for the live-recorded broadcast video, the dynamic encryption transmission of the data security transmission module improves the security of the media asset transmission process, ensures that the media asset transmission process is not tampered, ensures that the content played by the train television is the approved content, and reduces the safety production accidents. The video stream transcoding module is used for recoding the mixed video stream, so that the video stream can be continuously played in the high-speed television, and the problems of video playing blockage or long program transition switching time and poor user experience caused by the introduction of real-time live broadcast are solved. The transcoded video stream conforms to the video coding standard of the television set-top box of the high-speed rail train, the upgrading and modification cost of the existing equipment caused by introducing a new technology is reduced, the introduction of the new technology of the embodiment does not need to carry out any upgrading and modification on the existing television screen and the television set-top box of the high-speed rail television, the application range is wide, and the method is suitable for large-scale popularization.
Two specific practical application examples are provided below:
the first embodiment is as follows:
under a train revival scene of a high-speed train, a direct recording and broadcasting video mixed arranging and playing control system is deployed on a VER entertainment control system server of the train, a designated system network is configured, a train seat display Internet of things train-ground communication channel is used, video content played by a television screen on the revival train is achieved, live broadcast video streams are introduced on the basis of original recording and broadcasting videos, timely and efficient updating of media resource content is guaranteed, safe and reliable transmission of the media resource content is achieved, and any other transformation is not needed.
Example two:
the difference between the second example and the first example is that the operating system of the direct recording and playing video mixed editing and playing control system is different, and the second example runs in an android intelligent system.
Under a platform scene of a high-speed rail station, a direct recording and broadcasting video mixed arranging and broadcasting control system is deployed in an intelligent screen device system in the high-speed rail station, and the existing 4G/5G Internet of things channel or WIFI network channel of the intelligent screen device is used, so that the video content played by the intelligent screen device of the station can be introduced into a live video stream, the timely and efficient updating of media resource content is guaranteed, the media resource content is transmitted safely and reliably, and no other transformation is needed.
The two practical application examples can realize the replacement of automatic real-time or quasi-real-time updating by using the existing network channel in different scenes on the basis of the current periodic manual updating media asset mode, and add live streaming media assets in the media asset content. After the video media content and the media asset arrangement strategy are automatically downloaded from a ground platform of the high-speed rail television broadcast control system through the data security transmission module, after the security integrity of the media asset content and the arrangement strategy is verified, the video mixed arrangement module is used for arranging in real time and outputting the arranged video stream in real time, the video mixed arrangement module is used for coding the program video stream simultaneously containing a plurality of recorded broadcast contents and live broadcast contents in real time and outputting the video stream conforming to the existing specification of the high-speed rail television, and the program video stream mixed and arranged can be played under the condition that the television screen hardware of the high-speed rail train is not changed. After the direct recording and broadcasting video mixed editing and broadcasting control system is introduced, the high-speed television operator only needs to pay attention to the auditing of the media resource content and the editing of the program broadcasting strategy, so that the media resource content can be updated timely, efficiently and safely, and a large amount of manpower and material resources are saved.
Example 2
Based on the same inventive concept, an embodiment of the present invention further provides a live-action video mixing, arranging, and playing control method, which is applied to the live-action video mixing, arranging, and playing control system according to the foregoing embodiment, and as shown in fig. 5, includes the following steps:
s1, the broadcast control system ground platform acquires the recorded related data and transmits the related data to the data security transmission module;
s2, the data security transmission module performs security encryption transmission on the acquired related data; the related data comprises live streaming, recorded and broadcast videos, editing and broadcasting strategies and control instructions; converting the recorded and broadcast video into recorded and broadcast media resource video fragment information, and transmitting the recorded and broadcast media resource video fragment 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 cache module outputs live stream cache fragmentation information and transmits the information to the video mixing editing and broadcasting module;
s4, the video mixing editing and broadcasting module arranges and outputs continuous live broadcasting, recording and broadcasting mixed streams according to the video fragment information of the recording and broadcasting media and the live broadcasting stream cache fragment information and the specified time, place and sequence of the editing and broadcasting strategy, and transmits the live broadcasting, recording and broadcasting mixed streams to the video stream transcoding module;
and 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 and recorded broadcast mixed stream, transcodes the live broadcast and recorded broadcast mixed stream and outputs the video stream with uniform code rate, resolution and key frame control parameters to the set top box.
Since the method is applied to the direct recording and playing video mixed editing and playing control system, the implementation of the method can be referred to the implementation of the system, and repeated details are not repeated.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the method disclosed by the embodiment, as the method is applied to the system disclosed by the embodiment, the description is simple, and the relevant points can be referred to the system part for description.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A mixed editing and playing control system for live-recorded and played video is characterized by comprising: the system comprises a data security transmission module, a live broadcast stream cache module, a video mixing 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 acquired related data; the related data comprises live streaming, recorded and broadcast videos, editing and broadcasting strategies and control instructions; converting the recorded and broadcast video into recorded and broadcast media asset 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 fragments according to the live stream;
the video mixed editing and broadcasting module is used for editing and outputting continuous live broadcast recorded broadcast mixed streams according to the recorded broadcast media asset video fragments and the live broadcast stream cache fragments and the specified time, place and sequence of the editing and broadcasting strategy;
and 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 and recorded broadcast mixed stream, transcoding the live broadcast and recorded broadcast mixed stream and outputting a video stream with unified code rate, resolution and key frame control parameters.
2. A live video mixing, arranging and playing control method, which is applied to the live video mixing, arranging and playing control system according to claim 1, and comprises the following steps:
s1, the ground platform of the broadcast control system acquires the recorded related data and transmits the related data to the data security transmission module;
s2, the data security transmission module performs security encryption transmission on the acquired related data; the related data comprises live streaming, recorded and broadcast videos, editing and broadcasting strategies and control instructions; converting the recorded and broadcast video into recorded and broadcast media asset video fragment information, and transmitting the recorded and broadcast media asset video fragment information to a video mixing editing and broadcasting module;
s3, according to the live stream sent by the data security transmission module, the live stream cache module outputs live stream cache fragmentation information and transmits the information to the video mixing editing and broadcasting module;
s4, the video mixing editing and broadcasting module arranges and outputs continuous live broadcast recorded broadcast mixed stream according to the recorded broadcast media resource video fragment information and the live broadcast stream cache fragment information and the specified time, place and sequence of the editing and broadcasting strategy, and transmits the live broadcast recorded broadcast mixed stream to the video stream transcoding module;
and 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, recorded and broadcast mixed stream, transcodes the live broadcast, recorded and broadcast mixed stream and outputs the video stream with uniform code rate, resolution and key frame control parameters to the set top box.
3. The direct-recording video mixing, arranging and playing control method according to claim 2, wherein in step S2, the data security transmission module uses a dynamic-encryption VPN to perform security encryption transmission on the acquired related data.
4. The direct video recording and playing mixed editing and controlling method according to claim 2, wherein said step S4 includes:
s41, generating a first data result according to the recorded and broadcast media asset video slicing information; caching the slicing information according to the live streaming to generate a second data result;
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 (picture information system) station reporting arrangement algorithm, and outputting selected video fragment information by combining a matching rule selection algorithm;
and S43, outputting continuous live broadcast recorded broadcast mixed stream according to the selected video slicing information and the service of the editing algorithm, and transmitting the live broadcast recorded broadcast mixed stream to the video stream transcoding module.
5. The direct-recording video mixing, arranging and playing control method according to claim 4, wherein the matching rule selection algorithm in step S42 is obtained by the following steps:
s421, acquiring time information by a timing service, and acquiring PIS station reporting information by a PIS station reporting data receiving service; performing arrangement rule calculation on the time information and the PIS station reporting information to generate a rule to be matched;
s422, performing arrangement core scheduling on the playing arrangement rule base and the rule to be matched to generate an arrangement rule matching result; the playing and arranging rule base is generated according to the arranging and playing strategy;
and S423, generating a matching rule selection algorithm according to the arrangement algorithm service by using the arrangement rule matching result.
6. The direct-play video mixing, arranging and playing control method of claim 4, wherein the outputting of the continuous direct-play video mixing stream in step S43 includes:
when the selected video fragment information is the first fragment of the recorded and played media resources, setting a program conversion mark for the fragment, and inserting the program conversion mark into a mixed stream fragment list;
when the selected video fragment information is the first fragment of live broadcast, setting a live broadcast mark for the fragment, and inserting the live broadcast mark into the mixed editing stream fragment list;
and connecting the mixed stream slice list with a mixed stream program output interface to output continuous live broadcast recorded broadcast video stream.
7. The direct video recording and playing mixed editing and controlling method according to claim 2, wherein said step S5 includes:
s51, reading the mixed-encoding slice information in the live-broadcast recorded-broadcast mixed stream program list through a mixed-encoding stream program output interface, and re-acquiring video code stream information and key frame information according to the program change mark of each slice;
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 video resolution size of the decoded video frame data through a video filter;
and S54, inputting the uniformly adjusted video frame data to the initialized encoder for encoding, and outputting the video stream with uniform code rate, resolution and key frame control parameters to the set-top box.
8. The direct video recording and playing mixed editing and controlling method according to claim 7, wherein said step S52 includes:
s521, detecting a program change mark according to the video code stream information and the key frame information which are acquired again, outputting a first fragment after the program is changed, and re-initializing a decoder;
s522, on the basis of the step S521, detecting a live broadcast mark, outputting a live broadcast first segment, and re-initializing the decoder;
s523, decoding the video slice by the initialized decoder, and re-decoding the video frame data.
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