CN114915822B - Method and system for playing video by multiple screens - Google Patents
Method and system for playing video by multiple screens Download PDFInfo
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- CN114915822B CN114915822B CN202210702814.4A CN202210702814A CN114915822B CN 114915822 B CN114915822 B CN 114915822B CN 202210702814 A CN202210702814 A CN 202210702814A CN 114915822 B CN114915822 B CN 114915822B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/854—Content authoring
- H04N21/8547—Content authoring involving timestamps for synchronizing content
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention provides a method for playing video on multiple screens, which comprises the following steps: step S1, establishing Bluetooth connection for a plurality of handheld devices; step S2, after any one of the plurality of handheld devices receives the playing video signal, distributing the video to the rest handheld devices through wifi or hot spot at one time; step S3, according to a preset multi-screen playing layout, obtaining the video playing area of each handheld device; step S4, distributing the playing time axis position of the video to the rest handheld equipment according to the playing time corresponding to each frame of the video; s5, acquiring transmission delay time of a time axis position by counting delay time of Bluetooth distribution signals, and ensuring synchronous play of a plurality of handheld devices by the transmission delay time; the multi-screen synchronous playing of the video can be realized.
Description
Technical Field
The invention relates to the technical field of video playing, in particular to a method and a system for playing videos by multiple screens.
Background
The screen of one handheld device in the current market is too small, and even a plurality of handheld devices can only play the same content, so that the content cannot be expanded to a plurality of handheld devices for playing; in addition, in the prior art, a mode of projecting the video of the handheld device onto the television for playing is adopted, so that a direct-opening hot spot is also required for ensuring smooth screen projecting function, the heating value is large, and the power consumption is large.
The prior art is provided with the following application numbers: 201910648911.8; the publication number is: the invention discloses a Chinese patent of CN110545339A, which belongs to the technical field of mobile phone display and aims to solve the problems that under the control of mobile phone software, display pictures or video information of a small-screen smart mobile phone are respectively sent to corresponding different displays through split-screen processing, and then the displays are spliced and combined according to the split-screen mobile phone pictures or video source positions, so that the pictures or video information of the mobile phone can be combined and amplified. The scenario used in this patent is not the same as in this patent, and the problem solved is also different. The prior art patent supports that all mobile phone apps are directly projected onto a plurality of wireless displays, and wifi real-time connection is needed, and the wifi display is transmitted to display through real-time screen recording. This patent is to this special scene of video broadcast, once only distributes video file to several cell-phones through wifi, and prior art scheme needs a cell-phone to record the screen, and this scheme does not need, can practice thrift a handheld device. The prior art patent scheme plays and has the problem of delay, and the scheme can solve the problem of delay by setting and adjusting video playing time because the video content is known.
Disclosure of Invention
In order to overcome the problems, the invention aims to provide a method for playing video on multiple screens, which can realize synchronous playing of the video on multiple screens and solve the problem of delay by setting and adjusting the playing time of the video.
The invention is realized by adopting the following scheme: a method of multi-screen video playback, the method comprising the steps of:
step S1, establishing Bluetooth connection for a plurality of handheld devices;
step S2, after any one of the plurality of handheld devices receives the playing video signal, distributing the video to the rest handheld devices through wifi or hot spot at one time;
step S3, according to a preset multi-screen playing layout, obtaining the video playing area of each handheld device;
step S4, distributing the time point of video playing to the rest handheld equipment according to the playing time corresponding to each frame of the video;
and S5, acquiring transmission delay time of the time axis position by counting delay time of the Bluetooth distribution signals, and ensuring synchronous playing of a plurality of handheld devices by the transmission delay time.
Further, the step S3 is further specifically: the preset multi-screen playing layout comprises the following steps: and obtaining the playing area of each handheld device through the video resolution and the video direction by a plurality of screen layouts spliced horizontally, a plurality of screen layouts spliced vertically or a plurality of screen layouts spliced up, down, left and right.
Further, the step S5 is further specifically: the method comprises the steps that after the current system time is accurate to be millisecond, the current system time is obtained and is used as first time of the handheld device, a signal is sent to the handheld device II through Bluetooth, after the handheld device II obtains a video signal, first time of the handheld device II is obtained, the current system time after the handheld device II continuously obtains the video signal is used as second time of the handheld device II, the second time is sent to the handheld device I, and after the handheld device I receives the second time, second time of the handheld device I is obtained; then the equation is established: first time of the handheld device, mobile phone time error, transmission delay time = second first time of the handheld device; second time of the handheld device-time error of the mobile phone + transmission delay time = second time of the handheld device; the time error and the transmission delay time of the mobile phone can be obtained through the two equations, the first handheld device is set to drag the video to be played to any time point, and the second handheld device synchronously plays the video according to the time of the transmission delay after receiving the instruction.
The invention provides a system for playing videos on multiple screens, which comprises a Bluetooth building module, a video signal sending module, a video playing area setting module, a video sharing module and a video synchronizing module;
the Bluetooth establishing module establishes Bluetooth connection for a plurality of handheld devices;
the video signal sending module distributes the video to the rest handheld devices through wifi or hot spot once after receiving the playing video signal through any handheld device in the plurality of handheld devices;
the video playing area setting module acquires the area of each handheld device for playing video according to a preset multi-screen playing layout;
the video sharing module distributes the time point of video playing to the rest handheld equipment according to the playing time corresponding to each frame of the video;
the video synchronization module acquires the transmission delay time of the time axis position by counting the delay time of the Bluetooth distribution signal, and ensures synchronous playing of a plurality of handheld devices by the transmission delay time.
Further, the implementation manner of the video playing area setting module is further specifically as follows: the preset multi-screen playing layout comprises the following steps: and obtaining the playing area of each handheld device through the video resolution and the video direction by a plurality of screen layouts spliced horizontally, a plurality of screen layouts spliced vertically or a plurality of screen layouts spliced up, down, left and right.
Further, the implementation manner of the video synchronization module is further specifically as follows: the method comprises the steps that after the current system time is accurate to be millisecond, the current system time is obtained and is used as first time of the handheld device, a signal is sent to the handheld device II through Bluetooth, after the handheld device II obtains a video signal, first time of the handheld device II is obtained, the current system time after the handheld device II continuously obtains the video signal is used as second time of the handheld device II, the second time is sent to the handheld device I, and after the handheld device I receives the second time, second time of the handheld device I is obtained; then the equation is established: first time of the handheld device, mobile phone time error, transmission delay time = second first time of the handheld device; second time of the handheld device-time error of the mobile phone + transmission delay time = second time of the handheld device; the time error and the transmission delay time of the mobile phone can be obtained through the two equations, the first handheld device is set to drag the video to be played to any time point, and the second handheld device synchronously plays the video according to the time of the transmission delay after receiving the instruction.
The invention has the beneficial effects that: 1. a plurality of mobile phone screens are better utilized, so that the video can be amplified; 2. the video is transmitted once, and then is connected and synchronized through Bluetooth, so that the electric quantity is small, and the heating of the equipment is reduced; 3. the multi-screen synchronous video playing can be realized, and the delay problem is solved by setting and adjusting the video playing time.
Drawings
FIG. 1 is a schematic flow chart of the method of the present invention.
Fig. 2 is a system schematic block diagram of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, the present invention provides a method for playing video on multiple screens, which includes the following steps:
step S1, establishing Bluetooth connection for a plurality of handheld devices;
step S2, after any one of the plurality of handheld devices receives the playing video signal, distributing the video to the rest handheld devices through wifi or hot spot at one time;
step S3, according to a preset multi-screen playing layout, obtaining the video playing area of each handheld device; the step S3 is further specifically: the preset multi-screen playing layout comprises the following steps: and obtaining the playing area of each handheld device through the video resolution and the video direction by a plurality of screen layouts spliced horizontally, a plurality of screen layouts spliced vertically or a plurality of screen layouts spliced up, down, left and right.
Step S4, distributing the time point of video playing to the rest handheld equipment according to the playing time (namely the time axis position of the video) corresponding to each frame of the video;
and S5, acquiring transmission delay time of the time axis position by counting delay time of the Bluetooth distribution signals, and ensuring synchronous playing of a plurality of handheld devices by the transmission delay time. The step S5 is further specifically: the method comprises the steps that after the current system time is accurate to be millisecond, the current system time is obtained and is used as first time of the handheld device, a signal is sent to the handheld device II through Bluetooth, after the handheld device II obtains a video signal, first time of the handheld device II is obtained, the current system time after the handheld device II continuously obtains the video signal is used as second time of the handheld device II, the second time is sent to the handheld device I, and after the handheld device I receives the second time, second time of the handheld device I is obtained; then the equation is established: first time of the handheld device, mobile phone time error, transmission delay time = second first time of the handheld device; second time of the handheld device-time error of the mobile phone + transmission delay time = second time of the handheld device; the time error and the transmission delay time of the mobile phone can be obtained through the two equations, the first handheld device is set to drag the video to be played to any time point, and the second handheld device synchronously plays the video according to the time of the transmission delay after receiving the instruction.
The invention is further described with reference to the following specific examples:
the invention provides a method for playing video on multiple screens, which comprises the following steps: 1. a mobile phone 1 and a mobile phone 2, wherein a mobile phone 3 establishes Bluetooth connection;
2. any one of the mobile phones 1 and 2 receives the playing video signal, and distributes the video to the other mobile phones through wifi or hotspots;
3. obtaining the video playing area of each mobile phone according to the layout;
3.1, according to a preset layout, for example, 3 mobile phones can be horizontally spliced, and then the playing area of each mobile phone is calculated through the video resolution and the video direction;
the video is centered and the horizontal distance is calculated in equal proportion to the height. For example, after the three mobile phone screens are spliced, the width of the horizontal pixels is 1080+1080+1080, and the height pixels are 1920. If the video is 1600x960, the video after the enlargement is 3200x1920. The middle screen is 1080 played in the middle, the two-side screens are (3200-1080)/2=1060, so that the mobile phone 1 plays the content of the amplified videos (0, 0) to (1060, 1920) from the area (20, 0) to (1080,1920), the mobile phone 2 plays the content of the amplified videos (1061,0) to (2140, 1920), and the mobile phone 3 plays the content of the amplified videos (2141,0) to (3200, 1920);
4. distributing the playing time axis position of the video to other mobile phones according to the time axis position;
5. calculating the transmission delay time of the time axis position by counting the time of the Bluetooth distribution signal delay so as to ensure that a plurality of mobile phones play synchronously;
5.1 handset 1 sends a signal to handset 2 via bluetooth with the current system time accurate to millisecond (e.g. 2022 1 month 1 day 00: 00.111), handset 2 compares the current time difference (e.g. handset 2 time is 2022 1 month 1 day 00: 01.211), then the time difference is positive 1.1 seconds. The mobile phone 2 sends the current time to the mobile phone 1 (for example, the mobile phone 2 time is 2022, 1 month, 1 day, 00:00:01.311), and the mobile phone 1 current time is 2022, 1 month, 1 day, 00:00.411), the time difference is minus 0.9 seconds. Because of
Handset 1 first time (e.g., 2022, 1 month, 1 day, 00:00:00.111) +handset time error+transmission delay time = handset 2 first time (e.g., 2022, 1 month, 1 day, 00:00:01.211);
handset 2 second time (e.g., 2022, 1 month, 1 day, 00:00:01.311) -handset time error + transmission delay time = handset 1 second time (e.g., 2022, 1 month, 1 day, 00:00:00.411);
the time error of the mobile phone is 1 second, and the transmission delay time is 0.1 second.
5.2 when the mobile phone 1 sets the drag video to play to a certain time point (for example, 00:30:01), the mobile phone 2 starts playing from 00:30:01.1 seconds after receiving the command, so that the two mobile phones can synchronize. The handset 3 calculates the transmission delay time in a similar manner; thus, the synchronous playing of a plurality of handheld devices is ensured by the time of transmission delay.
Referring to fig. 2, the invention provides a system for playing video on multiple screens, which comprises a bluetooth establishing module, a video signal sending module, a video playing area setting module, a video sharing module and a video synchronizing module;
the Bluetooth establishing module establishes Bluetooth connection for a plurality of handheld devices;
the video signal sending module distributes the video to the rest handheld devices through wifi or hot spot once after receiving the playing video signal through any handheld device in the plurality of handheld devices;
the video playing area setting module acquires the area of each handheld device for playing video according to a preset multi-screen playing layout;
the video sharing module distributes the time point of video playing to the rest handheld equipment according to the playing time corresponding to each frame of the video;
the video synchronization module acquires the transmission delay time of the time axis position by counting the delay time of the Bluetooth distribution signal, and ensures synchronous playing of a plurality of handheld devices by the transmission delay time.
Further, the implementation manner of the video playing area setting module is further specifically as follows: the preset multi-screen playing layout comprises the following steps: and obtaining the playing area of each handheld device through the video resolution and the video direction by a plurality of screen layouts spliced horizontally, a plurality of screen layouts spliced vertically or a plurality of screen layouts spliced up, down, left and right.
Further, the implementation manner of the video synchronization module is further specifically as follows: the method comprises the steps that after the current system time is accurate to be millisecond, the current system time is obtained and is used as first time of the handheld device, a signal is sent to the handheld device II through Bluetooth, after the handheld device II obtains a video signal, first time of the handheld device II is obtained, the current system time after the handheld device II continuously obtains the video signal is used as second time of the handheld device II, the second time is sent to the handheld device I, and after the handheld device I receives the second time, second time of the handheld device I is obtained; then the equation is established: first time of the handheld device, mobile phone time error, transmission delay time = second first time of the handheld device; second time of the handheld device-time error of the mobile phone + transmission delay time = second time of the handheld device; the time error and the transmission delay time of the mobile phone can be obtained through the two equations, the first handheld device is set to drag the video to be played to any time point, and the second handheld device synchronously plays the video according to the time of the transmission delay after receiving the instruction.
The foregoing description is only of the preferred embodiments of the invention, and all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (4)
1. A method for multi-screen video playing, characterized in that: the method comprises the following steps:
step S1, establishing Bluetooth connection for a plurality of handheld devices;
step S2, after any one of the plurality of handheld devices receives the playing video signal, distributing the video to the rest handheld devices through wifi or hot spot at one time;
step S3, according to a preset multi-screen playing layout, obtaining the video playing area of each handheld device;
step S4, distributing the time point of video playing to the rest handheld equipment according to the playing time corresponding to each frame of the video;
s5, acquiring transmission delay time of a time axis position by counting delay time of Bluetooth distribution signals, and ensuring synchronous play of a plurality of handheld devices by the transmission delay time;
the step S5 is further specifically: the method comprises the steps that after the current system time is accurate to be millisecond, the current system time is obtained and is used as first time of the handheld device, a signal is sent to the handheld device II through Bluetooth, after the handheld device II obtains a video signal, first time of the handheld device II is obtained, the current system time after the handheld device II continuously obtains the video signal is used as second time of the handheld device II, the second time is sent to the handheld device I, and after the handheld device I receives the second time, second time of the handheld device I is obtained; then the equation is established: first time of the handheld device, mobile phone time error, transmission delay time = second first time of the handheld device; second time of the handheld device-time error of the mobile phone + transmission delay time = second time of the handheld device; the time error and the transmission delay time of the mobile phone can be obtained through the two equations, the first handheld device is set to drag the video to be played to any time point, and the second handheld device synchronously plays the video according to the time of the transmission delay after receiving the instruction.
2. The method for multi-screen video playback of claim 1, wherein: the step S3 is further specifically: the preset multi-screen playing layout comprises the following steps: and obtaining the playing area of each handheld device through the video resolution and the video direction by a plurality of screen layouts spliced horizontally, a plurality of screen layouts spliced vertically or a plurality of screen layouts spliced up, down, left and right.
3. A system for multi-screen video playback, comprising: the system comprises a Bluetooth establishment module, a video signal transmission module, a video playing area setting module, a video sharing module and a video synchronization module;
the Bluetooth establishing module establishes Bluetooth connection for a plurality of handheld devices;
the video signal sending module distributes the video to the rest handheld devices through wifi or hot spot once after receiving the playing video signal through any handheld device in the plurality of handheld devices;
the video playing area setting module acquires the area of each handheld device for playing video according to a preset multi-screen playing layout;
the video sharing module distributes the time point of video playing to the rest handheld equipment according to the playing time corresponding to each frame of the video;
the video synchronization module acquires transmission delay time of a time axis position by counting delay time of Bluetooth distribution signals and ensures synchronous play of a plurality of handheld devices by the transmission delay time;
the implementation mode of the video synchronization module is further specifically as follows: the method comprises the steps that after the current system time is accurate to be millisecond, the current system time is obtained and is used as first time of the handheld device, a signal is sent to the handheld device II through Bluetooth, after the handheld device II obtains a video signal, first time of the handheld device II is obtained, the current system time after the handheld device II continuously obtains the video signal is used as second time of the handheld device II, the second time is sent to the handheld device I, and after the handheld device I receives the second time, second time of the handheld device I is obtained; then the equation is established: first time of the handheld device, mobile phone time error, transmission delay time = second first time of the handheld device; second time of the handheld device-time error of the mobile phone + transmission delay time = second time of the handheld device; the time error and the transmission delay time of the mobile phone can be obtained through the two equations, the first handheld device is set to drag the video to be played to any time point, and the second handheld device synchronously plays the video according to the time of the transmission delay after receiving the instruction.
4. A system for multi-screen video playback as recited in claim 3, wherein: the implementation mode of the video playing area setting module is further specifically as follows: the preset multi-screen playing layout comprises the following steps: and obtaining the playing area of each handheld device through the video resolution and the video direction by a plurality of screen layouts spliced horizontally, a plurality of screen layouts spliced vertically or a plurality of screen layouts spliced up, down, left and right.
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| CN202210702814.4A CN114915822B (en) | 2022-06-21 | 2022-06-21 | Method and system for playing video by multiple screens |
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