CN113452935A - Horizontal screen and vertical screen live video generation system and method - Google Patents
Horizontal screen and vertical screen live video generation system and method Download PDFInfo
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- CN113452935A CN113452935A CN202111008115.1A CN202111008115A CN113452935A CN 113452935 A CN113452935 A CN 113452935A CN 202111008115 A CN202111008115 A CN 202111008115A CN 113452935 A CN113452935 A CN 113452935A
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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
- H04N5/268—Signal distribution or switching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/478—Supplemental services, e.g. displaying phone caller identification, shopping application
- H04N21/4788—Supplemental services, e.g. displaying phone caller identification, shopping application communicating with other users, e.g. chatting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/485—End-user interface for client configuration
- H04N21/4854—End-user interface for client configuration for modifying image parameters, e.g. image brightness, contrast
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/485—End-user interface for client configuration
- H04N21/4858—End-user interface for client configuration for modifying screen layout parameters, e.g. fonts, size of the windows
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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
- H04N5/2624—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 for obtaining an image which is composed of whole input images, e.g. splitscreen
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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
- H04N5/2628—Alteration of picture size, shape, position or orientation, e.g. zooming, rotation, rolling, perspective, translation
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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
- H04N5/278—Subtitling
Abstract
The invention provides a horizontal screen and vertical screen live broadcast video generation system and a method, which relate to the technical field of media and aim to solve the problems of lower convenience for recording horizontal and vertical screen pictures in live broadcast and higher cost for arranging a horizontal and vertical screen studio, and the system comprises: the device comprises a switching table, a camera in communication connection with the switching table, an L-shaped quick-mounting plate used for mounting the camera, a transverse and vertical screen key converter in communication connection with the camera, a caption machine in communication connection with the transverse and vertical screen key converter, a multi-picture dividing device in communication connection with the switching table, and a stream pushing server in communication connection with the multi-picture dividing device, wherein the transverse and vertical screen key converter is in communication connection with the switching table. The camera is arranged on different planes of the L-shaped quick-mounting plate, live broadcast picture signals with different aspect ratios are obtained, and picture subtitle signals with the aspect ratios suitable for picture electric signals are synthesized through the transverse and vertical screen key converters, so that convenience for recording transverse and vertical screen pictures in live broadcast can be improved, and cost can be reduced.
Description
Technical Field
The invention relates to the technical field of media, in particular to a system and a method for generating horizontal screen and vertical screen live videos.
Background
The transverse and vertical playing and the vertical screen playing are two modes that a user selects to play videos through mobile terminal equipment, the transverse screen playing can amplify pictures, the watching effect is better, the vertical screen playing enables the user to pay attention to more important information with a vertical visual angle, the information lightweight output is emphasized, in order to meet the watching requirements of different users in a live broadcast scene, a live broadcast program making department can flexibly switch the transverse screen live broadcast display and the vertical screen live broadcast display, and the requirements of new media video live broadcast in a new era are met.
The horizontal screen display mode and the vertical screen display mode need different signal sources, a handheld camera is usually added in related scenes as a vertical screen signal source, a portable integrated small-sized switching device or a server is added to meet the requirement of vertical screen system core signal scheduling, the portable integrated switching device takes super fusion as an idea, the recording, transmission, stream pushing, virtual studio image matting, multi-picture monitoring, an internal DDR digital media player channel, tone tuning, subtitles and the like of a vertical screen system are considered, and the functions are complete.
However, the addition of vertical screen devices such as handheld cameras increases the cost; meanwhile, most of the added equipment is portable, integrated and civil equipment, the signal index is low, and the difference is still existed compared with the requirement of professional production, so that the method is only suitable for producing small programs and cannot meet the production requirement of most high-quality programs; in addition, the device is suitable for the use of two sets of equipment in different scenes, and the switching use habit is more complex; more importantly, because the newly-added equipment nodes are single, a standby scheme is not available after a single point fails, and normal live broadcast of programs cannot be guaranteed. Thus resulting in less convenience in the generation of landscape and portrait videos and increased hardware cost.
Disclosure of Invention
The invention aims to solve the technical problems of low convenience in generating transverse screen and vertical screen videos and increased hardware cost, and provides a system and a method for generating transverse screen and vertical screen live videos.
The invention adopts the following technical means for solving the technical problems:
in a first aspect, a horizontal screen and vertical screen live video generation system is provided, including: the device comprises a switching table, a camera which is in communication connection with the switching table, an L-shaped quick-mounting plate which is used for mounting the camera, a transverse and vertical screen key converter which is in communication connection with the camera, a caption machine which is in communication connection with the transverse and vertical screen key converter, a multi-picture dividing device which is in communication connection with the switching table, and a plug-flow server which is in communication connection with the multi-picture dividing device, wherein the transverse and vertical screen key converter is in communication connection with the switching table;
the camera is used for shooting live broadcast pictures corresponding to the aspect ratios of the planes one by one on the basis of different planes arranged on the L-shaped quick-mounting plate, and generating picture electric signals according to the live broadcast pictures;
the caption machine is used for receiving input caption information and outputting a key signal of a preset frame and a filling signal of the preset frame according to the caption information;
the horizontal and vertical screen key converter is used for acquiring the picture electric signal, determining character face display coordinates in the picture electric signal, determining caption display coordinates of a picture caption according to a preset caption display distance and the character face display coordinates, and synthesizing the key signal of the preset picture and the filling signal of the preset picture into a picture caption signal adapting to the width-to-height ratio of the picture electric signal at least according to the caption display coordinates and the width-to-height ratio of the picture electric signal, wherein the caption display distance is the distance between a caption and the character face;
the switching station is used for receiving the picture electric signal and the picture caption signal, and superimposing graphic and text information, special effect information and station caption information input by a user in the picture electric signal and the picture caption signal to generate a first path of graphic and text superimposed video signal;
and the multi-picture dividing device is used for carrying out picture division on the first path of image-text superposed video signal according to the aspect ratio of the picture electric signal to obtain a live video signal which is pushed to the stream pushing server.
Preferably, the horizontal and vertical screen key converter is further configured to determine a frame picture window corresponding to each picture subtitle according to the key signal and the fill signal, where the frame picture window is used to represent a start display timestamp and an end display timestamp of the picture subtitle;
the synthesizing of the key signal of the preset frame and the filling signal of the preset frame into the picture caption signal adapting to the aspect ratio of the picture electrical signal at least according to the caption display coordinate and the aspect ratio of the picture electrical signal comprises:
and synthesizing the key signal of the preset picture and the filling signal of the preset picture into a picture caption signal adapting to the aspect ratio of the picture electric signal according to the frame picture window, the caption display coordinates and the aspect ratio of the picture electric signal.
Preferably, the system further comprises a video matrix device, a keyer in communication connection with the video matrix device, and a selection switch in communication connection with the switchyard;
the video matrix device is respectively in communication connection with the camera, the horizontal and vertical screen key converter and the selection switch, and is used for routing the acquired picture electric signals and the acquired picture subtitle signals to different communication interfaces;
the key controller is used for superposing the image-text information, the special effect information and the station caption information input by the user in the picture electric signal and the picture caption signal based on a communication interface routed by the video matrix device to generate a second path of image-text superposed video signal;
the selection switch is used for selecting a target video signal from two paths of image-text superposed video signals based on selection operation of a user, wherein the two paths of image-text superposed video signals comprise the first path of image-text superposed video signal and the second path of image-text superposed video signal;
the multi-picture dividing device is further used for carrying out high-definition video division on the target video signal and generating a live video signal for pushing to a push streaming server according to the target video signal after the high-definition video division.
Preferably, the number of the plug flow servers is multiple, the system further comprises a high-definition viewing and separating device in communication connection with the multiple plug flow servers, and the high-definition viewing and separating device is in communication connection with the multiple drawing and separating devices;
the high-definition video server is used for receiving the live video signals and converting the live video signals into a plurality of parts according to the number of the push streaming servers, converting each part of the live video signals into a video format corresponding to the rebroadcasting format of the push streaming server, and pushing the live video signals with the converted video format to the corresponding push streaming server.
Preferably, the picture electric signals comprise cross-screen picture electric signals, and the camera is used for shooting a cross-screen live broadcast picture with an aspect ratio of 16:9 under the condition that the camera is installed on the horizontal plane of the L-shaped quick installation plate, and generating the cross-screen picture electric signals with the aspect ratio of 16:9 according to the cross-screen live broadcast picture;
the transverse and vertical screen key converter is used for acquiring the transverse screen picture electric signal, determining character face display coordinates in the transverse screen picture electric signal, determining transverse screen caption display coordinates according to a preset caption display distance and the character face display coordinates, and synthesizing the key signal and the filling signal into a horizontal picture caption signal for horizontal placement according to the transverse screen caption display coordinates and the aspect ratio of the transverse screen live broadcast picture signal;
and the multi-picture dividing device is used for carrying out cross-screen picture division on the first path of image-text superposed video signal according to the aspect ratio of the cross-screen picture electric signal to obtain a cross-screen live video signal which is pushed to a stream pushing server.
Preferably, the picture electric signal comprises a vertical screen picture electric signal, and the camera is used for shooting an image with an aspect ratio of 9:16, generating an electric signal of the vertical screen image with the aspect ratio of 9:16 according to the vertical screen live broadcast image;
the transverse and vertical screen key converter is used for acquiring the vertical screen picture electric signal, determining character face display coordinates in the vertical screen picture electric signal, determining vertical screen caption display coordinates according to a preset caption display distance and the character face display coordinates, and synthesizing the key signal and the filling signal into a vertical picture caption signal for vertical placement according to the vertical screen caption display coordinates and the aspect ratio of the vertical screen live broadcast picture signal;
and the multi-picture dividing device is used for carrying out vertical screen picture division on the first path of image-text superposed video signal according to the aspect ratio of the vertical screen picture electric signal to obtain a vertical screen live broadcast video signal which is pushed to the plug flow server.
In a second aspect, a method for generating a horizontal-screen live video and a vertical-screen live video is provided, and the method includes:
shooting live broadcast pictures corresponding to the aspect ratios of the planes one by one through cameras arranged on different planes of the L-shaped quick-mounting plate, and generating picture electric signals according to the live broadcast pictures;
receiving input caption information through a caption machine, and outputting a key signal of a preset frame and a filling signal of the preset frame according to the caption information;
acquiring the picture electric signal through a horizontal and vertical screen key converter, determining character face display coordinates in the picture electric signal, determining caption display coordinates of a picture caption according to a preset caption display distance and the character face display coordinates, and synthesizing a key signal of a preset picture and a filling signal of the preset picture into a picture caption signal adapting to the width-to-height ratio of the picture electric signal at least according to the caption display coordinates and the width-to-height ratio of the picture electric signal, wherein the caption display distance is the distance between a caption and the character face;
receiving the picture electric signal and the picture caption signal through a switching station, and superposing image-text information, special effect information and station caption information input by a user in the picture electric signal and the picture caption signal to generate a first path of image-text superposed video signal;
and carrying out picture segmentation on the first path of image-text superposed video signal through a multi-picture device according to the aspect ratio of the picture electric signal to obtain a live video signal for pushing to a stream pushing server.
Preferably, the method further comprises:
determining a frame picture window corresponding to each picture subtitle through the transverse and vertical screen key converter according to the key signals and the filling signals, wherein the frame picture window is used for representing a starting display timestamp and an ending display timestamp of the picture subtitles;
the synthesizing of the key signal of the preset frame and the filling signal of the preset frame into the picture caption signal adapting to the aspect ratio of the picture electrical signal at least according to the caption display coordinate and the aspect ratio of the picture electrical signal comprises:
and synthesizing the key signal of the preset picture and the filling signal of the preset picture into a picture caption signal adapting to the aspect ratio of the picture electric signal according to the frame picture window, the caption display coordinates and the aspect ratio of the picture electric signal.
Preferably, the method further comprises:
routing the acquired picture electric signals and the acquired picture subtitle signals to different communication interfaces through video matrix devices which are respectively in communication connection with the camera, the transverse and vertical screen key converter and the selection switch;
superimposing graphic and text information, special effect information and station caption information input by a user in the picture electric signal and the picture subtitle signal through the key controller in communication connection with the video matrix device to generate a second path of graphic and text superimposed video signal;
selecting a target video signal from two paths of image-text superposed video signals through selection switches respectively in communication connection with the switching table, the key controller and the multi-picture dividing device based on selection operation of a user, wherein the two paths of image-text superposed video signals comprise the first path of image-text superposed video signal and the second path of image-text superposed video signal; and the number of the first and second electrodes,
and performing high-definition video separation on the target video signal through the multi-picture separation device, and generating a live video signal for pushing to a stream pushing server according to the target video signal subjected to high-definition video separation.
Preferably, the method further comprises:
under the condition that the number of the push stream servers is multiple, the live video signals are copied into multiple copies which are consistent with the number of the push stream servers through a high-definition video separation device in communication connection with the plurality of the push stream servers, each copy of the live video signals are converted into a video format corresponding to the rebroadcasting format of the push stream servers, and the live video signals with the converted video formats are pushed to the corresponding push stream servers.
Preferably, the picture electric signals include horizontal screen picture electric signals, the live broadcast pictures corresponding to the aspect ratios of the planes one by one are shot by cameras installed on different planes of the L-shaped quick-assembly plate, and the picture electric signals are generated according to the live broadcast pictures, including: under the condition that the camera is installed on the horizontal plane of the L-shaped quick installation plate, a cross screen live broadcast picture with the aspect ratio of 16:9 is shot, and a cross screen picture electric signal with the aspect ratio of 16:9 is generated according to the cross screen live broadcast picture;
the obtaining of the picture electric signal through the horizontal and vertical screen key converter comprises: acquiring the transverse screen picture electric signal through the transverse and vertical screen key converter;
the determining of the character face display coordinates in the picture electric signal and the determining of the caption display coordinates of the picture captions according to the preset caption display distance and the character face display coordinates comprise: determining character face display coordinates in the electric signals of the cross screen picture, and determining cross screen caption display coordinates according to a preset caption display distance and the character face display coordinates;
the synthesizing of the key signal of the preset frame and the filling signal of the preset frame into the picture caption signal adapting to the aspect ratio of the picture electrical signal at least according to the caption display coordinate and the aspect ratio of the picture electrical signal comprises: synthesizing the key signal and the filling signal into a horizontal picture subtitle signal for horizontal placement at least according to the horizontal screen subtitle display coordinates and the aspect ratio of the horizontal screen live broadcast picture signal;
the picture segmentation is carried out on the first path of image-text superposed video signal through a multi-picture division device according to the aspect ratio of the picture electric signal to obtain a live video signal for pushing to a stream pushing server, and the method comprises the following steps: and performing cross screen image segmentation on the first path of image-text superposed video signal through the multi-image segmentation device according to the aspect ratio of the cross screen image electric signal to obtain a cross screen live video signal for pushing to a stream pushing server.
Preferably, the picture electric signals include vertical screen picture electric signals, the live broadcast pictures corresponding to the aspect ratios of the planes one by one are shot by cameras installed on different planes of the L-shaped quick-assembly plate, and the picture electric signals are generated according to the live broadcast pictures, including: by mounting the camera on the vertical plane of the L-shaped quick-mounting plate, the shooting aspect ratio is 9:16, generating an electric signal of the vertical screen image with the aspect ratio of 9:16 according to the vertical screen live broadcast image;
the obtaining of the picture electric signal through the horizontal and vertical screen key converter comprises: acquiring the vertical screen picture electric signal through the transverse and vertical screen key converter;
the determining of the character face display coordinates in the picture electric signal and the determining of the caption display coordinates of the picture captions according to the preset caption display distance and the character face display coordinates comprise: determining character face display coordinates in the vertical screen picture electric signal, and determining vertical screen caption display coordinates according to a preset caption display distance and the character face display coordinates;
the synthesizing of the key signal of the preset frame and the filling signal of the preset frame into the picture caption signal adapting to the aspect ratio of the picture electrical signal at least according to the caption display coordinate and the aspect ratio of the picture electrical signal comprises: synthesizing the key signal and the filling signal into a vertical picture subtitle signal for vertical placement at least according to the vertical screen subtitle display coordinates and the aspect ratio of the vertical screen live broadcast picture signal;
the picture segmentation is carried out on the first path of image-text superposed video signal through a multi-picture division device according to the aspect ratio of the picture electric signal to obtain a live video signal for pushing to a stream pushing server, and the method comprises the following steps: and performing vertical screen picture segmentation on the first path of image-text superposed video signal through the multi-picture splitting device according to the aspect ratio of the vertical screen picture electric signal to obtain a vertical screen live video signal for pushing to a plug flow server.
Has the advantages that: the method is combined with the original system, the signal of the vertical screen system is added, the transverse screen live broadcast video generation system is transformed into the transverse screen and vertical screen live broadcast video generation system under the condition of small change, the addition of vertical screen equipment such as a handheld camera and the like is avoided, and the cost is reduced; meanwhile, all hardware facilities based on the original system are suitable for various program production, and the production requirement of high-quality programs can be met; in addition, only need to change the mounted position of camera at L type fast-assembling board, the use of a set of equipment need not to switch the simple operation degree higher, does not have newly-increased equipment that adds, therefore equipment node is single, can guarantee that the program is normally live.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a horizontal-screen and vertical-screen live video generation system according to the present invention;
fig. 2 is a schematic diagram of an embodiment of generating vertical subtitles of a picture by using a subtitle generator according to the present invention.
Fig. 3 is a flowchart of an embodiment of a method for generating a horizontal-screen live video and a vertical-screen live video according to the present invention.
The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a schematic structural diagram of a horizontal-screen and vertical-screen live video generation system in an embodiment of the present invention is shown in fig. 1, where the horizontal-screen and vertical-screen live video generation system 100 includes: the mobile terminal comprises a switching table 110, a camera 120 which is in communication connection with the switching table 110, an L-shaped fast-assembly board 130 for installing the camera 120, a horizontal and vertical screen key converter 140 which is in communication connection with the camera 120, a caption machine 150 which is in communication connection with the horizontal and vertical screen key converter 140, a multi-drawing device 160 which is in communication connection with the switching table 110, and a plug-flow server 170 which is in communication connection with the multi-drawing device 160, wherein the horizontal and vertical screen key converter 140 is in communication connection with the switching table 110;
the camera 120 is configured to shoot live broadcast pictures corresponding to aspect ratios of the planes one by one based on different planes installed on the L-shaped fast-installed board 130, and generate picture electric signals according to the live broadcast pictures;
the caption machine 150 is configured to receive input caption information, and output a key signal of a preset frame and a fill signal of the preset frame according to the caption information;
the horizontal and vertical screen key converter 140 is configured to obtain the picture electrical signal, determine a character face display coordinate in the picture electrical signal, determine a caption display coordinate of a picture caption according to a preset caption display distance and the character face display coordinate, and synthesize the key signal of the preset frame and the filling signal of the preset frame into a picture caption signal that is suitable for the width-to-height ratio of the picture electrical signal at least according to the caption display coordinate and the width-to-height ratio of the picture electrical signal, where the caption display distance is a distance between a caption and the character face;
the switching station 110 is configured to receive the picture electrical signal and the picture subtitle signal, and superimpose, in the picture electrical signal and the picture subtitle signal, text-text information, special effect information, and station caption information that are input by a user to generate a first path of text-text superimposed video signal;
the multi-picture dividing device 160 is configured to perform picture division on the first path of image-text superimposed video signal according to the aspect ratio of the picture electric signal, so as to obtain a live video signal for pushing to the stream pushing server 170. And then used for network output.
Specifically, the up-down-screen key converter 140 is a japanese-new digital up-screen key converter, which supports multi-standard signal input, such as standard signals HD, SDI/12G, SDI, and uses a 1:1 cutting method to cut 16:9 caption key, fill signal, convert to 9: and 9, selecting a picture required by the program through parameter coordinate adjustment, and intercepting the picture, wherein the picture can be used for outputting signals through 90-degree rotation. In addition, 16: and 9, converting the signal into 9: and 16, outputting the signals. The universal network interface is connected with the converter, and the menu and the internal configuration parameters can be adjusted.
Referring to fig. 2, the subtitling machine 150 inputs the key signal and the fill signal to the landscape-portrait key converter 140, and obtains a frame size of 9:9 vertical screen picture subtitles.
Specifically, the key signal and the fill signal of the caption machine 150 are visually divided and then output a 9:9 key signal, a 9:9 fill signal to the horizontal/vertical screen key converter 140, and the horizontal/vertical screen key converter 140 synthesizes and outputs 9:16 in frames. Meanwhile, the original studio system is accessed to serve as a caption signal of the vertical screen system.
Optionally, the system further includes a video recorder communicatively connected to the camera 120, where the video recorder is configured to play the live view acquired by the camera 120.
According to the system, on the basis of the original system, the cameras are installed on different planes through the L-shaped fast-assembling plate, so that the cameras can be installed on different planes, and further, live pictures with different width-to-height ratios corresponding to the planes one by one can be shot, picture subtitle signals adapting to the width-to-height ratios of the picture electric signals are synthesized through the transverse and vertical screen key converters, the system is combined with the original system, signals of a vertical screen system are added, the transverse screen live video generation system is transformed into the transverse screen live video generation system and the vertical screen live video generation system under the condition of small change, the addition of vertical screen equipment such as a handheld camera and the like is avoided, and the cost is reduced; meanwhile, all hardware facilities based on the original system are suitable for various program production, and the production requirement of high-quality programs can be met; in addition, only need to change the mounted position of camera at L type fast-assembling board, the use of a set of equipment need not to switch the simple operation degree higher, does not have newly-increased equipment that adds, therefore equipment node is single, can guarantee that the program is normally live.
Preferably, the horizontal and vertical screen key converter 140 is further configured to determine, according to the key signal and the fill signal, a frame picture window corresponding to each picture subtitle, where the frame picture window is used to represent a start display timestamp and an end display timestamp of the picture subtitle;
the synthesizing of the key signal of the preset frame and the filling signal of the preset frame into the picture caption signal adapting to the aspect ratio of the picture electrical signal at least according to the caption display coordinate and the aspect ratio of the picture electrical signal comprises:
and synthesizing the key signal of the preset picture and the filling signal of the preset picture into a picture caption signal adapting to the aspect ratio of the picture electric signal according to the frame picture window, the caption display coordinates and the aspect ratio of the picture electric signal.
Preferably, the system 100 further comprises a video matrix apparatus 180, a keyer 190 communicatively coupled to the video matrix apparatus 180, a selector switch 210 communicatively coupled to the switchyard 110;
the video matrix device 180 is in communication connection with the camera 120, the horizontal/vertical screen key converter 140, and the selection switch 210, and is configured to route the acquired picture electrical signals and the acquired picture subtitle signals to different communication interfaces;
the key controller 190 is configured to superimpose, based on a communication interface routed by the video matrix device, the image-text information, the special effect information, and the station caption information that are input by the user in the image electric signal and the image caption signal to generate a second path of image-text superimposed video signal;
the selection switch 210 is configured to select a target video signal from two paths of image-text superimposed video signals based on a selection operation of a user, where the two paths of image-text superimposed video signals include the first path of image-text superimposed video signal and the second path of image-text superimposed video signal; and converting the target video signal into a signal in a PGM format, and outputting the PGM.
The multi-view device 160 is further configured to perform high-definition video separation on the target video signal, and generate a live video signal for pushing to the streaming server 170 according to the target video signal after the high-definition video separation.
Preferably, there are a plurality of the plug flow servers 170, the system further includes a high definition video separator communicatively connected to the plurality of the plug flow servers 170, and the high definition video separator is communicatively connected to the multi-video separator 160;
the high-definition video server is configured to copy the live video signals into multiple copies according to the number of the streaming servers 170, convert each copy of the live video signals into a video format corresponding to the rebroadcasting format of the streaming server 170, and push the live video signals with the converted video format to the corresponding streaming server 170.
Preferably, the picture electric signals include cross-screen picture electric signals, and the camera 120 is configured to shoot a cross-screen live broadcast picture with an aspect ratio of 16:9 when the camera 120 is installed on the horizontal plane of the L-shaped quick mount 130, and generate a cross-screen picture electric signal with an aspect ratio of 16:9 according to the cross-screen live broadcast picture;
the horizontal and vertical screen key converter 140 is configured to obtain the horizontal screen picture electrical signal, determine character face display coordinates in the horizontal screen picture electrical signal, determine horizontal screen caption display coordinates according to a preset caption display distance and the character face display coordinates, and synthesize the key signal and the fill signal into a horizontal picture caption signal for horizontal placement according to the horizontal screen caption display coordinates and an aspect ratio of the horizontal screen live broadcast picture signal;
the multi-picture dividing device 160 is configured to perform cross-screen picture division on the first path of image-text superimposed video signal according to the aspect ratio of the cross-screen picture electric signal, so as to obtain a cross-screen live video signal for being pushed to the stream pushing server 170.
Preferably, the picture electric signal includes a vertical screen picture electric signal, and the camera 120 is configured to capture an image with an aspect ratio of 9:16, generating an electric signal of the vertical screen image with the aspect ratio of 9:16 according to the vertical screen live broadcast image;
the transverse and vertical screen key converter 140 is configured to obtain the vertical screen picture electric signal, determine a character face display coordinate in the vertical screen picture electric signal, determine a vertical screen caption display coordinate according to a preset caption display distance and the character face display coordinate, and synthesize the key signal and the filling signal into a vertical picture caption signal for vertical placement according to the vertical screen caption display coordinate and an aspect ratio of the vertical screen live broadcast picture signal;
the multi-picture dividing device 160 is configured to perform vertical screen picture division on the first path of image-text superimposed video signal according to the aspect ratio of the vertical screen picture electric signal, so as to obtain a vertical screen live video signal for being pushed to the stream pushing server 170.
Compare in the mode that increases almost complete equipment such as camera, switching platform, server and come to increase the scheme of erecting the screen preparation ability for the studio, this scheme only needs to increase very little cost, still can improve the preparation ability for the studio, improve equipment utilization. The recording and transmission of the broadcast-grade video quality of the traditional studio are reserved, and a camera, a player, a switching station and a monitor for monitoring shot and collected from the front end all meet the technical requirements of the radio and television central office. Compared with the scheme of using a portable civil camera and an integrated switching station, the method has the advantages that the program quality is inevitably reduced, the program quality is ensured, the content issued by a professional media organization facing a new media network platform can also reach the level of television program production, and the authority and the specialty of the professional media organization are ensured.
In addition, the setting is simply modified at a Nixin digital vertical screen key converter and a webpage control end with multiple divisions on horizontal and vertical screens, and the switching of the production modes of the horizontal and vertical screens of the studio can be completed within 30 seconds without restarting various devices and servers. Under simple and rapid operation, the system can flexibly adapt to different service requirements. The equipment of each link of the studio is complete, the function is independent, and the studio has complete safety protection design and backup link design in the aspect of system construction, thereby ensuring the normal production and broadcasting of programs. Even if a certain device fails, the whole program production is not influenced. Meanwhile, the system design is reserved, the increase of signals required by the field programs can be flexibly coped with, and the elastic requirement for manufacturing large, medium and small programs is met. The scheme can share the security design of the traditional studio, so that the production and the broadcasting of new media programs are safe and reliable enough, and the media quality and the effect of professional media organizations are guaranteed.
Based on the same inventive concept, referring to fig. 3, a flowchart of a method for generating a horizontal-screen live video and a vertical-screen live video in an embodiment of the present invention is shown in fig. 3, where the method includes:
in step S11, shooting live broadcast pictures corresponding to the aspect ratio of the plane one by one through cameras arranged on different planes of the L-shaped fast-assembling plate, and generating picture electric signals according to the live broadcast pictures;
in step S12, receiving the input caption information through a caption machine, and outputting a key signal of a preset frame and a fill signal of the preset frame according to the caption information;
in step S13, obtaining the electrical picture signal through a horizontal/vertical screen key converter, determining a character face display coordinate in the electrical picture signal, determining a caption display coordinate of a picture caption according to a preset caption display distance and the character face display coordinate, and synthesizing a key signal of the preset frame and a fill signal of the preset frame into a picture caption signal adapted to the aspect ratio of the electrical picture signal at least according to the caption display coordinate and the aspect ratio of the electrical picture signal, wherein the caption display distance is a distance between a caption and the character face;
in step S14, receiving the picture electrical signal and the picture caption signal through a switching station, and superimposing the user-entered teletext information, special effect information, and station caption information on the picture electrical signal and the picture caption signal to generate a first channel of teletext superimposed video signal;
in step S15, the first path of image-text superimposed video signal is subjected to image segmentation by the multi-image division device according to the aspect ratio of the image electric signal, so as to obtain a live video signal for being pushed to the stream pushing server.
Preferably, the method further comprises:
determining a frame picture window corresponding to each picture subtitle through the transverse and vertical screen key converter according to the key signals and the filling signals, wherein the frame picture window is used for representing a starting display timestamp and an ending display timestamp of the picture subtitles;
the synthesizing of the key signal of the preset frame and the filling signal of the preset frame into the picture caption signal adapting to the aspect ratio of the picture electrical signal at least according to the caption display coordinate and the aspect ratio of the picture electrical signal comprises:
and synthesizing the key signal of the preset picture and the filling signal of the preset picture into a picture caption signal adapting to the aspect ratio of the picture electric signal according to the frame picture window, the caption display coordinates and the aspect ratio of the picture electric signal.
Preferably, the method further comprises:
routing the acquired picture electric signals and the acquired picture subtitle signals to different communication interfaces through video matrix devices which are respectively in communication connection with the camera, the transverse and vertical screen key converter and the selection switch;
superimposing graphic and text information, special effect information and station caption information input by a user in the picture electric signal and the picture subtitle signal through the key controller in communication connection with the video matrix device to generate a second path of graphic and text superimposed video signal;
selecting a target video signal from two paths of image-text superposed video signals through selection switches respectively in communication connection with the switching table, the key controller and the multi-picture dividing device based on selection operation of a user, wherein the two paths of image-text superposed video signals comprise the first path of image-text superposed video signal and the second path of image-text superposed video signal; and the number of the first and second electrodes,
and performing high-definition video separation on the target video signal through the multi-picture separation device, and generating a live video signal for pushing to a stream pushing server according to the target video signal subjected to high-definition video separation.
Preferably, the method further comprises:
under the condition that the number of the push stream servers is multiple, the live video signals are copied into multiple copies which are consistent with the number of the push stream servers through a high-definition video separation device in communication connection with the plurality of the push stream servers, each copy of the live video signals are converted into a video format corresponding to the rebroadcasting format of the push stream servers, and the live video signals with the converted video formats are pushed to the corresponding push stream servers.
Preferably, the picture electric signals include horizontal screen picture electric signals, the live broadcast pictures corresponding to the aspect ratios of the planes one by one are shot by cameras installed on different planes of the L-shaped quick-assembly plate, and the picture electric signals are generated according to the live broadcast pictures, including: under the condition that the camera is installed on the horizontal plane of the L-shaped quick installation plate, a cross screen live broadcast picture with the aspect ratio of 16:9 is shot, and a cross screen picture electric signal with the aspect ratio of 16:9 is generated according to the cross screen live broadcast picture;
the obtaining of the picture electric signal through the horizontal and vertical screen key converter comprises: acquiring the transverse screen picture electric signal through the transverse and vertical screen key converter;
the determining of the character face display coordinates in the picture electric signal and the determining of the caption display coordinates of the picture captions according to the preset caption display distance and the character face display coordinates comprise: determining character face display coordinates in the electric signals of the cross screen picture, and determining cross screen caption display coordinates according to a preset caption display distance and the character face display coordinates;
the synthesizing of the key signal of the preset frame and the filling signal of the preset frame into the picture caption signal adapting to the aspect ratio of the picture electrical signal at least according to the caption display coordinate and the aspect ratio of the picture electrical signal comprises: synthesizing the key signal and the filling signal into a horizontal picture subtitle signal for horizontal placement at least according to the horizontal screen subtitle display coordinates and the aspect ratio of the horizontal screen live broadcast picture signal;
the picture segmentation is carried out on the first path of image-text superposed video signal through a multi-picture division device according to the aspect ratio of the picture electric signal to obtain a live video signal for pushing to a stream pushing server, and the method comprises the following steps: and performing cross screen image segmentation on the first path of image-text superposed video signal through the multi-image segmentation device according to the aspect ratio of the cross screen image electric signal to obtain a cross screen live video signal for pushing to a stream pushing server.
Preferably, the picture electric signals include vertical screen picture electric signals, the live broadcast pictures corresponding to the aspect ratios of the planes one by one are shot by cameras installed on different planes of the L-shaped quick-assembly plate, and the picture electric signals are generated according to the live broadcast pictures, including: by mounting the camera on the vertical plane of the L-shaped quick-mounting plate, the shooting aspect ratio is 9:16, generating an electric signal of the vertical screen image with the aspect ratio of 9:16 according to the vertical screen live broadcast image;
the obtaining of the picture electric signal through the horizontal and vertical screen key converter comprises: acquiring the vertical screen picture electric signal through the transverse and vertical screen key converter;
the determining of the character face display coordinates in the picture electric signal and the determining of the caption display coordinates of the picture captions according to the preset caption display distance and the character face display coordinates comprise: determining character face display coordinates in the vertical screen picture electric signal, and determining vertical screen caption display coordinates according to a preset caption display distance and the character face display coordinates;
the synthesizing of the key signal of the preset frame and the filling signal of the preset frame into the picture caption signal adapting to the aspect ratio of the picture electrical signal at least according to the caption display coordinate and the aspect ratio of the picture electrical signal comprises: synthesizing the key signal and the filling signal into a vertical picture subtitle signal for vertical placement at least according to the vertical screen subtitle display coordinates and the aspect ratio of the vertical screen live broadcast picture signal;
the picture segmentation is carried out on the first path of image-text superposed video signal through a multi-picture division device according to the aspect ratio of the picture electric signal to obtain a live video signal for pushing to a stream pushing server, and the method comprises the following steps: and performing vertical screen picture segmentation on the first path of image-text superposed video signal through the multi-picture splitting device according to the aspect ratio of the vertical screen picture electric signal to obtain a vertical screen live video signal for pushing to a plug flow server.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A horizontal screen and vertical screen live video generation system is characterized by comprising: the device comprises a switching table, a camera which is in communication connection with the switching table, an L-shaped quick-mounting plate which is used for mounting the camera, a transverse and vertical screen key converter which is in communication connection with the camera, a caption machine which is in communication connection with the transverse and vertical screen key converter, a multi-picture dividing device which is in communication connection with the switching table, and a plug-flow server which is in communication connection with the multi-picture dividing device, wherein the transverse and vertical screen key converter is in communication connection with the switching table;
the camera is used for shooting live broadcast pictures corresponding to the aspect ratios of the planes one by one on the basis of different planes arranged on the L-shaped quick-mounting plate, and generating picture electric signals according to the live broadcast pictures;
the caption machine is used for receiving input caption information and outputting a key signal of a preset frame and a filling signal of the preset frame according to the caption information;
the horizontal and vertical screen key converter is used for acquiring the picture electric signal, determining character face display coordinates in the picture electric signal, determining caption display coordinates of a picture caption according to a preset caption display distance and the character face display coordinates, and synthesizing the key signal of the preset picture and the filling signal of the preset picture into a picture caption signal adapting to the width-to-height ratio of the picture electric signal at least according to the caption display coordinates and the width-to-height ratio of the picture electric signal, wherein the caption display distance is the distance between a caption and the character face;
the switching station is used for receiving the picture electric signal and the picture caption signal, and superimposing graphic and text information, special effect information and station caption information input by a user in the picture electric signal and the picture caption signal to generate a first path of graphic and text superimposed video signal;
and the multi-picture dividing device is used for carrying out picture division on the first path of image-text superposed video signal according to the aspect ratio of the picture electric signal to obtain a live video signal which is pushed to the stream pushing server.
2. The system of claim 1, wherein the bar/portrait key converter is further configured to determine a frame picture window corresponding to each of the picture subtitles according to the key signal and the fill signal, the frame picture window being configured to represent a start display timestamp and an end display timestamp of the picture subtitles;
the synthesizing of the key signal of the preset frame and the filling signal of the preset frame into the picture caption signal adapting to the aspect ratio of the picture electrical signal at least according to the caption display coordinate and the aspect ratio of the picture electrical signal comprises:
and synthesizing the key signal of the preset picture and the filling signal of the preset picture into a picture caption signal adapting to the aspect ratio of the picture electric signal according to the frame picture window, the caption display coordinates and the aspect ratio of the picture electric signal.
3. The system of claim 1, further comprising a video matrix device, a keyer in communication with the video matrix device, a selection switch in communication with the switchyard;
the video matrix device is respectively in communication connection with the camera, the horizontal and vertical screen key converter and the selection switch, and is used for routing the acquired picture electric signals and the acquired picture subtitle signals to different communication interfaces;
the key controller is used for superposing the image-text information, the special effect information and the station caption information input by the user in the picture electric signal and the picture caption signal based on a communication interface routed by the video matrix device to generate a second path of image-text superposed video signal;
the selection switch is used for selecting a target video signal from two paths of image-text superposed video signals based on selection operation of a user, wherein the two paths of image-text superposed video signals comprise the first path of image-text superposed video signal and the second path of image-text superposed video signal;
the multi-picture dividing device is further used for carrying out high-definition video division on the target video signal and generating a live video signal for pushing to a push streaming server according to the target video signal after the high-definition video division.
4. The system of claim 3, wherein the plurality of push stream servers are provided, the system further comprising a high definition video server communicatively coupled to the plurality of push stream servers, the high definition video server communicatively coupled to the plurality of video servers;
the high-definition video server is used for receiving the live video signals and converting the live video signals into a plurality of parts according to the number of the push streaming servers, converting each part of the live video signals into a video format corresponding to the rebroadcasting format of the push streaming server, and pushing the live video signals with the converted video format to the corresponding push streaming server.
5. The system according to any one of claims 1 to 4, wherein the picture electric signal comprises a cross-screen picture electric signal, and the camera is used for shooting a cross-screen live broadcast picture with an aspect ratio of 16:9 under the condition that the camera is installed on the horizontal plane of the L-shaped quick installation plate, and generating the cross-screen picture electric signal with the aspect ratio of 16:9 according to the cross-screen live broadcast picture;
the transverse and vertical screen key converter is used for acquiring the transverse screen picture electric signal, determining character face display coordinates in the transverse screen picture electric signal, determining transverse screen caption display coordinates according to a preset caption display distance and the character face display coordinates, and synthesizing the key signal and the filling signal into a horizontal picture caption signal for horizontal placement according to the transverse screen caption display coordinates and the aspect ratio of the transverse screen live broadcast picture signal;
and the multi-picture dividing device is used for carrying out cross-screen picture division on the first path of image-text superposed video signal according to the aspect ratio of the cross-screen picture electric signal to obtain a cross-screen live video signal which is pushed to a stream pushing server.
6. The system according to any one of claims 1 to 4, wherein the picture electric signal comprises a portrait picture electric signal, and the camera is configured to photograph an aspect ratio of 9:16, generating an electric signal of the vertical screen image with the aspect ratio of 9:16 according to the vertical screen live broadcast image;
the transverse and vertical screen key converter is used for acquiring the vertical screen picture electric signal, determining character face display coordinates in the vertical screen picture electric signal, determining vertical screen caption display coordinates according to a preset caption display distance and the character face display coordinates, and synthesizing the key signal and the filling signal into a vertical picture caption signal for vertical placement according to the vertical screen caption display coordinates and the aspect ratio of the vertical screen live broadcast picture signal;
and the multi-picture dividing device is used for carrying out vertical screen picture division on the first path of image-text superposed video signal according to the aspect ratio of the vertical screen picture electric signal to obtain a vertical screen live broadcast video signal which is pushed to the plug flow server.
7. A method for generating horizontal screen live video and vertical screen live video is characterized by comprising the following steps:
shooting live broadcast pictures corresponding to the aspect ratios of the planes one by one through cameras arranged on different planes of the L-shaped quick-mounting plate, and generating picture electric signals according to the live broadcast pictures;
receiving input caption information through a caption machine, and outputting a key signal of a preset frame and a filling signal of the preset frame according to the caption information;
acquiring the picture electric signal through a horizontal and vertical screen key converter, determining character face display coordinates in the picture electric signal, determining caption display coordinates of a picture caption according to a preset caption display distance and the character face display coordinates, and synthesizing a key signal of a preset picture and a filling signal of the preset picture into a picture caption signal adapting to the width-to-height ratio of the picture electric signal at least according to the caption display coordinates and the width-to-height ratio of the picture electric signal, wherein the caption display distance is the distance between a caption and the character face;
receiving the picture electric signal and the picture caption signal through a switching station, and superposing image-text information, special effect information and station caption information input by a user in the picture electric signal and the picture caption signal to generate a first path of image-text superposed video signal;
and carrying out picture segmentation on the first path of image-text superposed video signal through a multi-picture device according to the aspect ratio of the picture electric signal to obtain a live video signal for pushing to a stream pushing server.
8. The method of claim 7, wherein the method further comprises:
determining a frame picture window corresponding to each picture subtitle through the transverse and vertical screen key converter according to the key signals and the filling signals, wherein the frame picture window is used for representing a starting display timestamp and an ending display timestamp of the picture subtitles;
the synthesizing of the key signal of the preset frame and the filling signal of the preset frame into the picture caption signal adapting to the aspect ratio of the picture electrical signal at least according to the caption display coordinate and the aspect ratio of the picture electrical signal comprises:
and synthesizing the key signal of the preset picture and the filling signal of the preset picture into a picture caption signal adapting to the aspect ratio of the picture electric signal according to the frame picture window, the caption display coordinates and the aspect ratio of the picture electric signal.
9. The method of claim 7, wherein the method further comprises:
routing the acquired picture electric signals and the acquired picture subtitle signals to different communication interfaces through video matrix devices which are respectively in communication connection with the camera, the transverse and vertical screen key converter and the selection switch;
superimposing graphic and text information, special effect information and station caption information input by a user in the picture electric signal and the picture subtitle signal through the key controller in communication connection with the video matrix device to generate a second path of graphic and text superimposed video signal;
selecting a target video signal from two paths of image-text superposed video signals through selection switches respectively in communication connection with the switching table, the key controller and the multi-picture dividing device based on selection operation of a user, wherein the two paths of image-text superposed video signals comprise the first path of image-text superposed video signal and the second path of image-text superposed video signal; and the number of the first and second electrodes,
and performing high-definition video separation on the target video signal through the multi-picture separation device, and generating a live video signal for pushing to a stream pushing server according to the target video signal subjected to high-definition video separation.
10. The method of claim 9, wherein the method further comprises:
under the condition that the number of the stream pushing servers is multiple, the live video signals are copied into multiple copies with the number being consistent with that of the stream pushing servers through a high-definition video device, each copy of the live video signals are converted into a video format corresponding to the rebroadcasting format of the stream pushing server, and the live video signals with the converted video formats are pushed to the corresponding stream pushing servers.
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