CN108600654B - Video playing method and device - Google Patents
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- CN108600654B CN108600654B CN201810407538.2A CN201810407538A CN108600654B CN 108600654 B CN108600654 B CN 108600654B CN 201810407538 A CN201810407538 A CN 201810407538A CN 108600654 B CN108600654 B CN 108600654B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
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Abstract
The embodiment of the invention provides a video broadcasting method and device, and belongs to the technical field of broadcasting guide. The method comprises the following steps: obtaining a broadcast instruction, wherein the broadcast instruction is used for indicating that a current video signal is output to first display equipment from a first output channel at the current time; determining whether the current video signal has been output from a second output channel to a second display device before the current time based on the director instruction; and when the current video signal is judged to be output to the second display device from the second output channel before the current time, the current video signal is stopped from being output to the first display device from the first output channel. Therefore, the problem of occurrence of live broadcast accidents caused by repeated broadcast of the same video signal is avoided, and the flexibility, integrity, tightness and live broadcast efficiency of real-time monitoring of broadcast information of the director control system are improved.
Description
Technical Field
The invention relates to the technical field of broadcasting guide, in particular to a video broadcasting method and device.
Background
With the rapid development of the broadcast television technology, the gradual improvement of information communication means, the popularization of monitoring and portable camera equipment, and the information source of a live broadcast task are greatly enriched. The television live broadcast adopts an original mode of one picture live broadcast, so that important events of live broadcast scenes are difficult to be comprehensively displayed, mass live broadcast video information is often considered after being selected and rejected by a broadcast guide system, a lot of important and wonderful multi-angle live broadcast video content is lost, and the requirements of individuation, diversification and comprehensive visual angle of audiences are difficult to meet. In the live broadcast task, a plurality of camera devices are generally used for shooting, so that the program has the characteristics of multiple angles and multiple scenes, and the program is more comprehensive and better in performance. The director is responsible for selecting one signal from multiple signals to broadcast to a specified channel, and is a core part for completing a live broadcast task.
In recent years, it has become common to broadcast pip, multi-view separated images, and even cross-channel videos of different viewing angles of the same event during live broadcasting (for example, when olympic games are played simultaneously, only one channel and one live broadcast are not enough at all). Particularly in the fields of command, display, conference, security protection, analog simulation and the like, a command center and a command post adopting a large-screen display system need to simultaneously display a plurality of videos with different angles of the same live event according to different directing requirements, so that the comprehensive control on the live content is realized, and the task requirements of high-level conference live broadcast, military performance live broadcast and the like are met.
Whether picture-in-picture, multi-picture separated image or multi-channel broadcasting is adopted, great challenges are brought to a broadcasting guide system, the mode of multi-input and multi-output of the original video signals is changed into the mode of multi-input and multi-output, which is equal to the mode of broadcasting one television channel and the mode of broadcasting a plurality of television channels, and the workload of the broadcasting guide system in a live broadcasting task is multiplied. Therefore, it is necessary to set a plurality of independent director units in a director system, share all input video signals of the whole director system, and select suitable video signals from the input video signals to be played to different display channels according to the live broadcast requirements.
However, when a plurality of broadcast channels of the broadcast directing system broadcast directly at the same time, the problem of broadcast content repetition occurs, and both the plurality of broadcast channels should display video signals of different shooting angles or shooting scenes, and the same video signal is displayed due to various reasons, so that the significance of multi-channel broadcast is lost, and a live broadcast accident is caused. The method is mainly caused by the following conditions:
under the condition that a plurality of broadcasting channels broadcast at the same time, the start time and the end time of a live event or scene concerned by each broadcasting channel are different, namely in the live broadcasting process, part of the broadcasting channels have no available video signals within a period of time, the video contents displayed by other broadcasting channels need to be displayed according to a broadcast guide record, and generally, videos with other shooting angles different from the video contents are selected to be used as an auxiliary display means of the same scene, but in the actual operation, because the display contents of the two broadcasting channels are overlapped, the situation that a plurality of broadcasting channels broadcast repeated video signals at a certain moment is easily caused along with the continuous switching of different camera position images by a broadcast guide unit;
when an accident occurs in a live broadcast task and cannot be strictly executed according to a director script, such as signal disconnection, event delay, emergency and the like, the problem of unsmooth communication easily occurs in the content of a plurality of director units in a short time, so that the situation that a plurality of broadcast channels broadcast repeated video signals is caused;
the condition that a plurality of broadcasting channels broadcast repeated video signals is caused by misoperation of an operator of the broadcast guide system.
Therefore, a certain repeated video signal broadcasting probability exists in the broadcasting system when multi-channel images are live broadcast, the broadcasting system usually avoids the problem by further perfecting and refining the broadcasting scheme and record and by timely communication and elaborate operation of the broadcasting system operation and management personnel, but a good solution is not provided for misoperation and emergency handling.
Disclosure of Invention
In view of the above, an object of the embodiments of the present invention is to provide a video playing method and apparatus, so as to improve the above problem.
In a first aspect, an embodiment of the present invention provides a video playing method, which is applied to a central control device in a director control system, and the method includes: obtaining a broadcast instruction, wherein the broadcast instruction is used for indicating that a current video signal is output to first display equipment from a first output channel at the current time; determining whether the current video signal has been output from a second output channel to a second display device before the current time based on the director instruction; when so, terminating the output of the current video signal from the first output channel to the first display device.
Further, the central control device prestores a corresponding relationship between input and output of a video matrix selecting and cutting device connected with the central control device, where the corresponding relationship is a corresponding relationship between an output channel i of the video matrix selecting and cutting device and an input channel j of the video matrix selecting and cutting device, and stores the corresponding relationship as a first array, the central control device further stores a numerical value of the output channel i of the video matrix selecting and cutting device as a second array, the output channel i is a channel which is currently involved in live broadcast and outputs a video signal to a display device, the input channel j is a channel which is currently involved in live broadcast and inputs a video signal to the video matrix selecting and cutting device, where i is 0-n, j is 0-m, n and m are positive integers, and based on the director instruction, it is determined whether the current video signal has been output from the second output channel before the current time To a second display device, comprising: acquiring a channel numerical value of the first output channel based on the broadcasting instruction; judging whether the channel value of the first output channel is the same as the value of the output channel i in the second array or not; if so, acquiring a numerical value of a current input channel of the video matrix selecting and cutting equipment, which inputs the current video signal; judging whether the value of the current input channel is the same as the value of the input channel j in the first array or not; if so, then it is determined that the current video signal has been output from the second output channel to the second display device prior to the current time.
Further, terminating the output of the current video signal from the first output channel to the first display device includes: canceling or pausing execution of the director instruction to terminate output of the current video signal from the first output channel to the first display device.
Further, after terminating the output of the current video signal from the first output channel to the first display device, the method further comprises: and controlling the alarm equipment to send an alarm prompt.
In a second aspect, an embodiment of the present invention provides a video playing method, which is applied to a central control device in a director control system, and the method includes: obtaining a broadcast instruction, wherein the broadcast instruction is used for indicating that a current video signal is output to a first display window of a display device from a first output channel at the current time; determining whether the current video signal has been output from a second output channel to a second display window of the display device before the current time based on the director instruction; when so, terminating the output of the current video signal from the first output channel to a first display window of the display device.
In a third aspect, an embodiment of the present invention provides a video playing apparatus, where the apparatus is a central control device operating in a director control system, and the apparatus includes: the first instruction acquisition module is used for acquiring a broadcast instruction, wherein the broadcast instruction is used for indicating that the current video signal is output to first display equipment from a first output channel at the current time; the first signal repeated broadcasting judging module is used for judging whether the current video signal is output to second display equipment from a second output channel before the current time or not based on the broadcasting guide instruction; and the first termination module is used for terminating the output of the current video signal from the first output channel to the first display device when the current video signal is judged to be output from the second output channel to the second display device before the current time.
Further, the central control device prestores a corresponding relationship between input and output of a video matrix selecting and cutting device connected with the central control device, the corresponding relationship is a corresponding relationship between an output channel i of the video matrix selecting and cutting device and an input channel j of the video matrix selecting and cutting device, the corresponding relationship is stored as a first array, the central control device also prestores a numerical value of the output channel i of the video matrix selecting and cutting device as a second array, the output channel i is a channel which is currently involved in live broadcast and outputs a video signal to a display device, the input channel j is a channel which is currently involved in live broadcast and inputs the video signal to the video matrix selecting and cutting device, wherein i is 0-n, j is 0-m, n and m are positive integers, and the first signal repeatedly plays judgment module, the method comprises the following steps: an output channel value obtaining unit, configured to obtain a channel value of the first output channel based on the director instruction; the output channel numerical value judging unit is used for judging whether the channel numerical value of the first output channel is the same as the numerical value of the output channel i in the second array or not; an input channel value obtaining unit, configured to obtain a value of a current input channel, where the current video signal is input to the video matrix selection and cutting device, when it is determined that a channel value of the first output channel is the same as a value of an output channel i in the second array; an input channel value judging unit, configured to judge whether a value of the current input channel is the same as a value of an input channel j in the first array; and the repeated playing judging unit is used for judging that the current video signal is output to second display equipment from a second output channel before the current time when the numerical value of the current input channel is judged to be the same as the numerical value of the input channel j in the first array.
Further, the first termination module is specifically configured to cancel or suspend execution of the director instruction to terminate output of the current video signal from the first output channel to the first display device.
Further, the apparatus further comprises: and the alarm module is used for controlling the alarm equipment to send out an alarm prompt.
In a fourth aspect, an embodiment of the present invention provides a video playing apparatus, which is operated in a central control device in a director control system, and the apparatus includes: the second instruction acquisition module is used for acquiring a broadcast instruction, wherein the broadcast instruction is used for indicating that the current video signal is output to a first display window of the display device from the first output channel at the current time; a second signal repeat broadcast determining module, configured to determine, based on the broadcast directing instruction, whether the current video signal is output from a second output channel to a second display window of the display device before the current time; and the second termination module is used for terminating the output of the current video signal from the first output channel to the first display window of the display device when the current video signal is judged to be output from the second output channel to the second display window of the display device before the current time.
The embodiment of the invention has the beneficial effects that:
the embodiment of the invention provides a video broadcasting method and a video broadcasting device, the method firstly obtains a broadcasting instruction, the director instruction is to direct a current video signal to be output from a first output channel to a first display device at a current time, then determining whether the current video signal has been output from a second output channel to a second display device before the current time based on the director instruction, upon determining that the current video signal has been output from a second output channel to a second display device prior to the current time, terminating the output of the current video signal from the first output channel to the first display device, therefore, the problem of occurrence of live broadcast accidents caused by repeated broadcast of the same video signal is avoided, and the flexibility, integrity, tightness and live broadcast efficiency of real-time monitoring of broadcast information of the director control system are improved.
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 the practice of the embodiments 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.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a block diagram of a director control system according to an embodiment of the present invention;
fig. 2 is a block diagram of another director control system according to an embodiment of the present invention;
fig. 3 is a block diagram showing a configuration of a central control device applicable to an embodiment of the present application;
fig. 4 is a flowchart of a video playing method according to an embodiment of the present invention;
fig. 5 is a flowchart of another video playing method according to an embodiment of the present invention;
fig. 6 is a block diagram of a video playing apparatus according to an embodiment of the present invention;
fig. 7 is a block diagram of another video playing apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, fig. 1 is a block diagram of a director control system 100 according to an embodiment of the present invention, where the director control system 100 includes a central control device 110, a video matrix selecting and switching device 120, and a splicing and fusion processing device 130, where the central control device 110 is connected to the video matrix selecting and switching device 120 and the splicing and fusion processing device 130, respectively, and the video matrix selecting and switching device 120 is connected to the splicing and fusion processing device 130.
The video matrix selecting and switching device 120 is an electronic device that can output m channels of video signals to n channels of monitoring devices by an array switching method, that is, switches a video image from any input channel to any output channel, that is, is used for selecting and switching the video signals.
The stitching fusion processing device 130 is configured to divide a complete image signal into N blocks and then distribute the N blocks to N video display units (e.g., rear projection units), so as to complete a super-large screen dynamic image display screen formed by a plurality of common video units.
In the embodiment of the present invention, the splicing fusion processing device 130 has a built-in frame synchronization processing function and a signal conversion function, and a video signal selection and switching processing function, and controls an output window thereof to switch any input channel signal, so for simplicity of description in this embodiment, as shown in fig. 2, the splicing fusion processing device 130 may directly serve as the video matrix selection and switching device 120, the director control system 100 may be simplified to include only the video matrix selection and switching device 120 and the central control device 110, and the central control device 110 is used to control the video matrix selection and switching device 120 to select and switch the video signal to output to the display device for video playing or displaying.
It should be noted that, in the practical application process, since there are likely to be many video matrix selecting and cutting devices 120 in the director control system 100, for convenience of description of the present solution, one video matrix selecting and cutting device 120 is taken as an example in the embodiment of the present invention for illustration.
Referring to fig. 3, fig. 3 is a block diagram illustrating a structure of a central control device 110 applicable to the embodiment of the present application. The central control apparatus 110 may include a video playout device, a memory 101, a memory controller 102, a processor 103, and a peripheral interface 104.
The memory 101, the memory controller 102, the processor 103, and the peripheral interface 104 are electrically connected to each other directly or indirectly to realize data transmission or interaction. For example, the components may be electrically connected to each other via one or more communication buses or signal lines. The video playout device includes at least one software function module that may be stored in the memory 101 in the form of software or firmware (firmware) or solidified in an Operating System (OS) of the video playout device. The processor 103 is used to execute executable modules stored in the memory 101, such as software functional modules or computer programs comprised by the video playout device.
The Memory 101 may be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Read-Only Memory (EPROM), an electrically Erasable Read-Only Memory (EEPROM), and the like. The memory 101 is configured to store a program, and the processor 103 executes the program after receiving an execution instruction, and the method executed by the server defined by the flow process disclosed in any of the foregoing embodiments of the present invention may be applied to the processor 103, or implemented by the processor 103.
The processor 103 may be an integrated circuit chip having signal processing capabilities. The Processor 103 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor 103 may be any conventional processor or the like.
The peripheral interface 104 couples various input/output devices to the processor 103 as well as to the memory 101. In some embodiments, the peripheral interface 104, the processor 103, and the memory controller 102 may be implemented in a single chip. In other examples, they may be implemented separately from the individual chips.
The peripheral interface 104 couples various input/output devices to the processor 103 as well as to the memory 101. In some embodiments, the peripheral interface 104, the processor 103, and the memory controller 102 may be implemented in a single chip. In other examples, they may be implemented separately from the individual chips.
It is understood that the configuration shown in fig. 3 is merely illustrative, and the central control apparatus 110 may include more or fewer components than those shown in fig. 3, or have a different configuration than that shown in fig. 3. The components shown in fig. 3 may be implemented in hardware, software, or a combination thereof.
Referring to fig. 4, fig. 4 is a flowchart of a video playing method according to an embodiment of the present invention, where the method is applied to a central control device in the director control system, and the method includes the following steps:
step S110: and obtaining a broadcast instruction, wherein the broadcast instruction is used for indicating that the current video signal is output to the first display device from the first output channel at the current time.
The central control device is used for obtaining a broadcast instruction, and the broadcast instruction is used for indicating that the current video signal is output to the first display device from the first output channel at the current time.
The director instruction may be an instruction triggered by the director operating on the central control device, that is, the current video signal is selected and switched to be output to the first display device, for example, the current output signal of the first display device is a signal output by a field camera in a field of a football game, and the current video signal is a signal output by a goal camera.
As another implementation, the central control device may be controlled by a terminal device, and the director may directly operate on the terminal device, so that the terminal device inputs a director instruction to the central control device, and thus the central control device may also directly obtain the director instruction, thereby performing subsequent response operations.
The first output channel may be an output channel of a front-end device connected to the first display device, that is, the front-end device outputs a video signal to a signal output channel of the first display device, where the front-end device may refer to the video matrix selecting and switching device, the video matrix selecting and switching device is directly connected to the first display device, the video matrix selecting and switching device has a plurality of input channels and a plurality of output channels, the plurality of output channels may be respectively connected to different display devices, for example, the output channel 1 is connected to the display device 1, the output channel 2 is connected to the display device 2, and each output channel may output a video signal of a different signal source, so that the video signal may be output to different display devices through the output channel to be played.
Step S120: and judging whether the current video signal is output to a second display device from a second output channel before the current time or not based on the broadcasting guide instruction.
In this embodiment, the first display device and the second display device are two different display devices, that is, the first display device and the second display device display video signals of different signal sources.
The central control device prestores a corresponding relation between input and output of a video matrix selecting and cutting device connected with the central control device, the corresponding relation is a corresponding relation between an output channel i of the video matrix selecting and cutting device and an input channel j of the video matrix selecting and cutting device, the corresponding relation is stored as a first array, the central control device also stores a numerical value of the output channel i of the video matrix selecting and cutting device as a second array, the output channel i is a channel which is currently participated in live broadcast and outputs a video signal to a display device, the input channel j is a channel which is currently participated in live broadcast and inputs the video signal to the video matrix selecting and cutting device, wherein the value of i is 0-n, and the value of j is 0-m.
Of course, if there are multiple front-end devices of the display device, for example, multiple video matrix selection and switching devices, the corresponding relationship is a corresponding relationship between input and output channels between each video matrix selection and switching device currently participating in live broadcasting, the corresponding relationship is stored in the first array, and each output channel value currently participating in live broadcasting of each video matrix selection and switching device is stored in the second array.
It can be understood that the central control device may obtain the connection lines between the devices in the current use process, for example, in a single broadcast guiding process, the connection relationship between each device is already determined, that is, which video signal is input from which input channel and which output channel is output to which display device is determined, so that a one-to-one correspondence relationship between two processing rings adjacent to a signal transmission processing link in the broadcast guiding control system, between an output channel of a previous link device and an input channel of a next link device, that is, a correspondence relationship between an output channel of a front end device and an input channel of a back end device, may be sequentially obtained.
The director can also check the device specification, obtain the control protocol and instruction of each device in the director control system, and then input into the central control device, therefore, the central control device can obtain the corresponding relationship between the output channel and the input channel of each device in real time, and store the obtained corresponding relationship into a plurality of dynamic arrays (i.e. the first array), but because of the performance, transmission bandwidth and rate limitation of some controlled devices, especially devices with control interfaces of RS232 and RS485, the time consumption is long in the process from the state acquisition instruction to the completion of the device state data reception, and in the device working state data reception process, the controlled device cannot receive and execute other instructions, thereby affecting the use of the controlled devices, and a proper method is needed according to the actual situation, and the specific method is as follows: (1) under the condition that the performance of the controlled equipment and the bandwidth of a control signal line are enough, a working state query instruction is sent to the controlled equipment by a periodic refreshing method, and a query result is analyzed; (2) part of the controlled equipment has an instruction processing result receipt function, and the receipt instruction of the controlled equipment is monitored and analyzed in real time; (3) by modifying the method for controlling the equipment by the central control equipment, adding a trigger event, after the broadcasting instruction is sent, sending a specified channel query instruction to other equipment related in the broadcasting instruction, and analyzing a query result; (4) and analyzing the read result by a method of reading the control port cache in real time.
Therefore, the central control device correspondingly obtains the device line connection relationship according to the obtained real-time corresponding relationship between the output channel and the input channel of each device, analyzes and obtains the corresponding relationship between the output channels of the video matrix switching devices and the input channel at the front end at the current moment, stores the obtained corresponding relationship into the first array, and periodically refreshes the corresponding relationship, thereby ensuring the real validity of the numerical value.
The central control equipment can also obtain the values of the playing channels of the display equipment corresponding to the multi-channel playing channels according to the connecting lines of all the equipment in the system, and select the output channel needing to be checked according to the requirements of the live broadcast task, namely, the value of the channel which is currently involved in live broadcast and outputs the video signal to the display equipment is stored in the second array, namely, for the output channel which is the video matrix selection and switching equipment, the value of the output channel which is not allowed to output the repeated information of the video matrix selection and switching equipment is stored in the second array.
Since the play-out path of the video signal currently being live broadcast in the one-time director process is stored in the first array and the second array, for example, for the video signal 1, the play-out line thereof is input from the input channel 1 of the video matrix selecting and cutting device, output from the output channel 1 of the video matrix selecting and cutting device, and then input to the display device 1, the corresponding relation to the video signal 1 stored in the first array may be "video signal 1-1-1-display device 1", for the video signal 2, the play-out line thereof is input from the input channel 2 of the video matrix selecting and cutting device, output from the output channel 2 of the video matrix selecting and cutting device, and then input to the display device 2 ", the corresponding relation to the video signal 2 stored in the first array may be" video signal 2-2-display device 2 ", and if j is 1 or 2, the output channel value is 1 and 2 according to the corresponding relation, and 1 and 2 are stored in the second array, wherein i is 1 or 2.
Therefore, in step S120, determining whether the current video signal has been output from the second output channel to the second display device before the current time based on the director instruction includes: acquiring a channel numerical value of the first output channel based on the broadcasting instruction; judging whether the channel value of the first output channel is the same as the value of the output channel i in the second array or not; if so, acquiring a numerical value of a current input channel of the video matrix selecting and cutting equipment, which inputs the current video signal; judging whether the value of the current input channel is the same as the value of the input channel j in the first array or not; if yes, determining that the current video signal is output from the second output channel to the second display device before the current time, and executing step S130: terminating the output of the current video signal from the first output channel to the first display device. Of course, if it is determined that the current video signal is not output from another output channel in advance, then step S140 is directly performed: and responding to the broadcasting instruction, and outputting the current video signal from the first output channel to the first display equipment.
Specifically, the output channel values in the second array are output channels currently available for output to the display device, that is, in the current program directing process, the output channels in the second array are all available, and output channels not stored in the second array are not available, which can be understood that the remaining output channels do not participate in the current live broadcast process, so the remaining output channels may not participate in the comparison process in the above steps. Therefore, the judgment of whether the current video signal is output in advance comprises two comparison processes, namely, whether the selected and cut output channel is the current live channel, namely the available channel is judged in the first comparison process, and the second comparison process is to compare whether the input channel of the current video signal is stored in the first array in advance, so that whether the current video signal is output to other display equipment in advance is judged.
Specifically, the director instruction obtained by the central control device carries a channel value of the first output channel and a value of the current input channel of the current video signal, and certainly, the director instruction also carries identification information of the current video signal, and the correspondence stored in the first array includes identification information corresponding to each video signal. For example, if the director instruction indicates that the current video signal is input from the input channel with the value of 1 of the video matrix selecting and cutting device and output from the output channel with the value of 2 of the video matrix selecting and cutting device, the central control device may obtain the channel value of the first output channel as 2, and if the values of the plurality of output channels of the video matrix selecting and cutting device are stored in the second array, for example, "1, 2, and 3" are stored in the second array, where i is 1 or 2 or 3, the obtained channel value 2 of the first output channel is compared with the values of the output channels i stored in the second array one by one, and it is determined whether the channel value of the first output channel is the same as the value of the output channel stored in the second array, and if so, the selected and cut output channel 2 is the live channel, and the output channel 2 is available. However, since the current video signal may have been output from another output channel in advance, in order to avoid repeated playing of the current video signal, it is further necessary to determine whether the value of the input channel of the current video signal input to the video matrix selecting and cutting device is the same as the value of the input channel j in the first array, for example, if the value of the input channel of the current video signal input to the video matrix selecting and cutting device is 1, and the value of j in the first array is 1,2, or 3, it may be determined that the value of the input channel is the same as the value of the input channel j in the first array, which indicates that the current video signal has been output from another output channel in advance, that is, it is determined that the current video signal has been output from the second output channel to the second display device before the current time.
For ease of understanding, a specific example is described below, for example, the video signals currently on the air are a goal video signal and a field coach video signal, in which case the display device 1 outputs a goal video signal, the display device 2 outputs a field coach video signal, the goal video signal of which is 1 on the input channel and 2 on the output channel of the video matrix selection and cutting device, the field coach video signal of which is 3 on the input channel and 4 on the output channel of the video matrix selection and cutting device, the corresponding relations of "goal video signal-1-2-display device 1" and "field coach video signal-3-4-display device 2" are stored in the first array, and "2, 4" are stored in the second array, if the goal video signal is to be selected and cut on the display device 2 for playing, however, the goal video signal has been played on the display device 1 in advance, so to avoid the problem of repeated playing, it is determined whether the output channel 4 exists in the second array, if yes, it is determined whether the input channel 1 corresponding to the goal video signal exists in the first array, if yes, it is determined that the goal video signal has been output from another output channel (i.e., the output channel 2) to another display device before the current time, and then step S130 is executed: terminating the output of the current video signal from the first output channel to the first display device.
It should be noted that when the channel value of the first output channel is determined to be different from the value of the output channel i in the second array, the director instruction is directly responded to, and the current video signal is output from the first output channel to the first display device, and when the value of the current input channel is determined to be different from the value of the input channel j in the first array, the director instruction is also directly responded, and the current video signal is output from the first output channel to the first display device.
The specific way to terminate the output of the current video signal from the first output channel to the first display device may be: the central control device is pre-stored with a corresponding termination processing method, and the termination processing method is to cancel or suspend the execution of the director instruction, so as to terminate the output of the current video signal from the first output channel to the first display device, thereby avoiding the occurrence of live broadcast accidents caused by the repeated broadcast of the current video signal.
In addition, in order to prompt the director that the current video signal has been output from the second output channel to the second display device in advance, after step S130, the central control device may further control the alarm device to issue an alarm prompt, where the alarm device may be a voice prompt device, so that the director may know that the current switched current video signal has been output from another output channel in advance, and in order to avoid repeated broadcast, the director may output from the first output channel according to the video signal that can be switched again after obtaining the alarm prompt.
In addition, referring to fig. 5, an embodiment of the present invention further provides a flowchart of another video playing method, where the method is also applied to a central control device in the foregoing director control system, and the method includes the following steps:
step S210: and obtaining a broadcast instruction, wherein the broadcast instruction is used for indicating that the current video signal is output to a first display window of the display device from a first output channel at the current time.
For the same display device, different videos may be displayed by different display windows of the same display device, so the present embodiment is different from the above embodiments in that the display device is the same.
It is to be understood that the director instruction is for instructing the current video signal to be output from the first output channel to the first display window of the display device, for example, the director instruction is for instructing the current video signal to be output from the first output channel 1 of the video matrix cut selection device to the first display window 1 of the display device.
Step S220: and judging whether the current video signal is output to a second display window of the display device from a second output channel before the current time or not based on the broadcasting guide instruction.
The central control device prestores a corresponding relation between input and output of a video matrix selecting and cutting device connected with the central control device, the corresponding relation is a corresponding relation between an output channel i of the video matrix selecting and cutting device, an input channel j of the video matrix selecting and cutting device and a display window of a display device, the corresponding relation is stored as a first array, the central control device also stores a numerical value of the output channel i of the video matrix selecting and cutting device as a second array, the output channel i is a channel which is currently involved in live broadcast and outputs a video signal to the display device, the input channel j is a channel which is currently involved in live broadcast and inputs the video signal to the video matrix selecting and cutting device, wherein i is 0-n, and j takes a value of 0-m.
The specific determination process is similar to the determination process in step S120, and is not described herein again, and a specific embodiment is described below.
For example, if the video signal 1 is used as the current video signal, which is currently input from the input channel 1 of the video matrix selecting and cutting device, the output channel 1 is output to the display window 1 of the display device, the video signal 2 is input from the input channel 2 of the video matrix selecting and cutting device, and the output channel 2 is output to the display window 2 of the display device, the corresponding relations stored in the first array are "video signal 1-1-1-display window 1" and "video signal 2-2-2-display window 2", the second array stores "1, 2", if the current video signal is selected and cut to the display window 2 for output at the current time, the director instruction is analyzed to obtain the output channel 2, the output channel 2 is compared with the values stored in the second array first, and the comparison result is that the value of the output channel is the same as the value in the second array, then, the value 1 of the input channel 1 is compared with the first array, and if the comparison result is that the value of the input channel is the same as the value in the first array, step S230 is executed: terminating the output of the current video signal from the first output channel to a first display window of the display device.
Of course, when it is determined that the current video signal is not output from the second output channel to the second display window of the display device before the current time based on the director instruction, step S240 is performed: and responding to the broadcasting instruction, and outputting the current video signal from the first output channel to a first display window of a display device at the current time.
It should be noted that, for brevity of description, the detailed description in the present embodiment may refer to the detailed description in the previous embodiment, and redundant description is not repeated here.
Referring to fig. 6, fig. 6 is a block diagram of a video playing apparatus 200 according to an embodiment of the present invention, where the apparatus operates in a central control device in a director control system, and the apparatus includes:
a first instruction obtaining module 210, configured to obtain a broadcast instruction, where the broadcast instruction is used to instruct a current video signal to be output from a first output channel to a first display device at a current time;
a first signal repeat play determination module 220, configured to determine, based on the broadcast instruction, whether the current video signal is output from a second output channel to a second display device before the current time;
a first termination module 230, configured to terminate outputting the current video signal from the first output channel to the first display device when it is determined that the current video signal is output from the second output channel to the second display device before the current time.
As an implementation manner, the central control device stores in advance a corresponding relationship between input and output of a video matrix selecting and switching device connected to the central control device, where the corresponding relationship is a corresponding relationship between an output channel i of the video matrix selecting and switching device and an input channel j of the video matrix selecting and switching device, and stores the corresponding relationship as a first array, the central control device further stores a numerical value of the output channel i of the video matrix selecting and switching device as a second array, the output channel i is a channel that outputs a video signal to a display device currently participating in live broadcasting, the input channel j is a channel that inputs a video signal to the video matrix selecting and switching device currently participating in live broadcasting, where i is 0 to n, j is 0 to m, n and m are positive integers, the first signal repeat broadcast determining module 220, the method comprises the following steps:
an output channel value obtaining unit, configured to obtain a channel value of the first output channel based on the director instruction;
the output channel numerical value judging unit is used for judging whether the channel numerical value of the first output channel is the same as the numerical value of the output channel i in the second array or not;
an input channel value obtaining unit, configured to obtain a value of a current input channel, where the current video signal is input to the video matrix selection and cutting device, when it is determined that a channel value of the first output channel is the same as a value of an output channel i in the second array;
an input channel value judging unit, configured to judge whether a value of the current input channel is the same as a value of an input channel j in the first array;
and the repeated playing judging unit is used for judging that the current video signal is output to second display equipment from a second output channel before the current time when the numerical value of the current input channel is judged to be the same as the numerical value of the input channel j in the first array.
As an embodiment, the first termination module 230 is specifically configured to cancel or suspend execution of the director instruction, so as to terminate output of the current video signal from the first output channel to the first display device.
As an embodiment, the apparatus further comprises:
and the alarm module is used for controlling the alarm equipment to send out an alarm prompt.
Referring to fig. 7, fig. 7 is a block diagram of another video playing apparatus 300 according to an embodiment of the present invention, where the apparatus operates in a central control device in a director control system, and the apparatus includes:
a second instruction obtaining module 310, configured to obtain a broadcast instruction, where the broadcast instruction is used to instruct a current video signal to be output from a first output channel to a first display window of a display device at a current time;
a second signal repeat play determination module 320, configured to determine, based on the broadcast instruction, whether the current video signal is output from a second output channel to a second display window of the display device before the current time;
a second termination module 330, configured to terminate the output of the current video signal from the first output channel to the first display window of the display device when it is determined that the current video signal is output from the second output channel to the second display window of the display device before the current time.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working process of the apparatus described above may refer to the corresponding process in the foregoing method, and will not be described in too much detail herein.
In summary, the embodiments of the present invention provide a video playing method and apparatus, the method first obtains a broadcast guide command, the director instruction is to direct a current video signal to be output from a first output channel to a first display device at a current time, then determining whether the current video signal has been output from a second output channel to a second display device before the current time based on the director instruction, upon determining that the current video signal has been output from a second output channel to a second display device prior to the current time, terminating the output of the current video signal from the first output channel to the first display device, therefore, the problem of occurrence of live broadcast accidents caused by repeated broadcast of the same video signal is avoided, and the flexibility, integrity, tightness and live broadcast efficiency of real-time monitoring of broadcast information of the director control system are improved.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, the functional modules in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (8)
1. A video playing method is applied to a center control device in a director control system, and the method comprises the following steps:
obtaining a broadcast instruction, wherein the broadcast instruction is used for indicating that a current video signal is output to first display equipment from a first output channel at the current time;
determining whether the current video signal has been output from a second output channel to a second display device before the current time based on the director instruction;
when yes, terminating the output of the current video signal from the first output channel to the first display device;
the central control device prestores a corresponding relation between input and output of a video matrix selecting and cutting device connected with the central control device, the corresponding relation is a corresponding relation between an output channel i of the video matrix selecting and cutting device and an input channel j of the video matrix selecting and cutting device, the corresponding relation between a numerical value of the input channel j and a numerical value of the output channel i is stored as a first array, the central control device also prestores a numerical value of the output channel i of the video matrix selecting and cutting device as a second array, the output channel i is a channel which is currently involved in live broadcast and outputs a video signal to a display device, the input channel j is a channel which is currently involved in live broadcast and inputs a video signal to the video matrix selecting and cutting device, wherein the value of i is 0-n, the value of j is 0-m, and the value of n, m is a positive integer, and determining whether the current video signal has been output from a second output channel to a second display device before the current time based on the director instruction, includes:
acquiring a channel numerical value of the first output channel based on the broadcasting instruction;
judging whether the channel value of the first output channel is the same as the value of the output channel i in the second array or not;
if so, acquiring a numerical value of a current input channel of the video matrix selecting and cutting equipment, which inputs the current video signal;
judging whether the value of the current input channel is the same as the value of the input channel j in the first array or not;
if so, then it is determined that the current video signal has been output from the second output channel to the second display device prior to the current time.
2. The method of claim 1, wherein terminating the output of the current video signal from the first output channel to the first display device comprises:
canceling or pausing execution of the director instruction to terminate output of the current video signal from the first output channel to the first display device.
3. The method of claim 1, wherein after terminating the output of the current video signal from the first output channel to the first display device, the method further comprises:
and controlling the alarm equipment to send an alarm prompt.
4. A video playing method is applied to a center control device in a director control system, and the method comprises the following steps:
obtaining a broadcast instruction, wherein the broadcast instruction is used for indicating that a current video signal is output to a first display window of a display device from a first output channel at the current time;
determining whether the current video signal has been output from a second output channel to a second display window of the display device before the current time based on the director instruction;
when the current video signal is output from the first output channel to the first display window of the display device, the first output channel is started;
the central control device stores a corresponding relation between input and output of a video matrix selecting and cutting device connected with the central control device in advance, the corresponding relation is a corresponding relation between an output channel i of the video matrix selecting and cutting device, an input channel j of the video matrix selecting and cutting device and a display window of the display device, the corresponding relation between a numerical value of the input channel j and a numerical value of the output channel i is stored as a first array, the central control device also stores a numerical value of the output channel i of the video matrix selecting and cutting device as a second array, the output channel i is a channel which is currently involved in live broadcast and outputs a video signal to the display device, the input channel j is a channel which is currently involved in live broadcast and inputs the video signal to the video matrix selecting and cutting device, wherein i takes a value of 0-n, j takes a value of 0-m, n and m are positive integers, and whether the current video signal is output to a second display window of the display device from a second output channel before the current time is judged based on the director instruction comprises the following steps:
acquiring a channel numerical value of the first output channel based on the broadcasting instruction;
judging whether the channel value of the first output channel is the same as the value of the output channel i in the second array or not;
if so, acquiring a numerical value of a current input channel of the video matrix selecting and cutting equipment, which inputs the current video signal;
judging whether the value of the current input channel is the same as the value of the input channel j in the first array or not;
when so, then it is determined that the current video signal has been output from a second output channel to a second display window of the display device prior to the current time.
5. A video broadcasting apparatus, wherein the apparatus is a central control device operating in a director control system, the apparatus comprising:
the first instruction acquisition module is used for acquiring a broadcast instruction, wherein the broadcast instruction is used for indicating that the current video signal is output to first display equipment from a first output channel at the current time;
the first signal repeated broadcasting judging module is used for judging whether the current video signal is output to second display equipment from a second output channel before the current time or not based on the broadcasting guide instruction;
a first termination module, configured to terminate output of the current video signal from the first output channel to the first display device when it is determined that the current video signal has been output from a second output channel to a second display device before the current time;
the central control device prestores a corresponding relation between input and output of a video matrix selecting and cutting device connected with the central control device, the corresponding relation is a corresponding relation between an output channel i of the video matrix selecting and cutting device and an input channel j of the video matrix selecting and cutting device, the corresponding relation between a numerical value of the input channel j and a numerical value of the output channel i is stored as a first array, the central control device also prestores a numerical value of the output channel i of the video matrix selecting and cutting device as a second array, the output channel i is a channel which is currently involved in live broadcast and outputs a video signal to a display device, the input channel j is a channel which is currently involved in live broadcast and inputs a video signal to the video matrix selecting and cutting device, wherein the value of i is 0-n, the value of j is 0-m, and the value of n, m is a positive integer, and the first signal repeated broadcast judgment module comprises:
an output channel value obtaining unit, configured to obtain a channel value of the first output channel based on the director instruction;
the output channel numerical value judging unit is used for judging whether the channel numerical value of the first output channel is the same as the numerical value of the output channel i in the second array or not;
an input channel value obtaining unit, configured to obtain a value of a current input channel, where the current video signal is input to the video matrix selection and cutting device, when it is determined that a channel value of the first output channel is the same as a value of an output channel i in the second array;
an input channel value judging unit, configured to judge whether a value of the current input channel is the same as a value of an input channel j in the first array;
and the repeated playing judging unit is used for judging that the current video signal is output to second display equipment from a second output channel before the current time when the numerical value of the current input channel is judged to be the same as the numerical value of the input channel j in the first array.
6. The apparatus of claim 5, wherein the first termination module is specifically configured to cancel or suspend execution of the director instruction to terminate output of the current video signal from the first output channel to the first display device.
7. The apparatus of claim 5, further comprising:
and the alarm module is used for controlling the alarm equipment to send out an alarm prompt.
8. A video broadcasting apparatus, wherein the apparatus is a central control device operating in a director control system, the apparatus comprising:
the second instruction acquisition module is used for acquiring a broadcast instruction, wherein the broadcast instruction is used for indicating that the current video signal is output to a first display window of the display device from the first output channel at the current time;
a second signal repeat broadcast determining module, configured to determine, based on the broadcast directing instruction, whether the current video signal is output from a second output channel to a second display window of the display device before the current time;
a second termination module, configured to terminate output of the current video signal from the first output channel to a first display window of the display device when it is determined that the current video signal has been output from a second output channel to a second display window of the display device before the current time;
the central control device stores a corresponding relation between input and output of a video matrix selecting and cutting device connected with the central control device in advance, the corresponding relation is a corresponding relation between an output channel i of the video matrix selecting and cutting device, an input channel j of the video matrix selecting and cutting device and a display window of the display device, the corresponding relation between a numerical value of the input channel j and a numerical value of the output channel i is stored as a first array, the central control device also stores a numerical value of the output channel i of the video matrix selecting and cutting device as a second array, the output channel i is a channel which is currently involved in live broadcast and outputs a video signal to the display device, the input channel j is a channel which is currently involved in live broadcast and inputs the video signal to the video matrix selecting and cutting device, wherein i takes a value of 0-n, j takes a value of 0-m, n and m are positive integers, and the second signal repeated broadcast judgment module is specifically used for:
acquiring a channel numerical value of the first output channel based on the broadcasting instruction;
judging whether the channel value of the first output channel is the same as the value of the output channel i in the second array or not;
if so, acquiring a numerical value of a current input channel of the video matrix selecting and cutting equipment, which inputs the current video signal;
judging whether the value of the current input channel is the same as the value of the input channel j in the first array or not;
when so, then it is determined that the current video signal has been output from a second output channel to a second display window of the display device prior to the current time.
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