CN108924639A - A kind of wireless video optical projection system applied to teaching scene - Google Patents
A kind of wireless video optical projection system applied to teaching scene Download PDFInfo
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- CN108924639A CN108924639A CN201810669242.8A CN201810669242A CN108924639A CN 108924639 A CN108924639 A CN 108924639A CN 201810669242 A CN201810669242 A CN 201810669242A CN 108924639 A CN108924639 A CN 108924639A
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- ipad
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Classifications
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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
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network
- H04N21/43637—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11]
-
- 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
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/4104—Peripherals receiving signals from specially adapted client devices
- H04N21/4122—Peripherals receiving signals from specially adapted client devices additional display device, e.g. video projector
-
- 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
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
-
- 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]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/643—Communication protocols
- H04N21/6437—Real-time Transport Protocol [RTP]
-
- 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
- H04N21/81—Monomedia components thereof
- H04N21/8166—Monomedia components thereof involving executable data, e.g. software
-
- 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
- H04N21/81—Monomedia components thereof
- H04N21/8166—Monomedia components thereof involving executable data, e.g. software
- H04N21/8193—Monomedia components thereof involving executable data, e.g. software dedicated tools, e.g. video decoder software or IPMP tool
Abstract
A kind of wireless video optical projection system applied to teaching scene, wraps iPad or smart phone, Windows computer and wireless router；Wherein, iPad or smart phone are mounted with iPad or smart phone client software of the present invention, push away video flowing for the shooting of video, and to Windows computer client, meanwhile, also support long-range control Windows computer client；Windows computer hardware installs client software, and has built Nginx streaming media server, for the reception of video, the broadcasting of video, the storage of video；Using wireless router, a WLAN is established, guarantees that window client and iPad are connected into the WLAN；Streaming media server is built using nginx in window client：In iPad the Video coding in camera real-time video or photograph album, window client is transferred to by WLAN.
Description
Technical field
The invention belongs to the wireless data transmission fields of computer processing technology, and in particular to one kind is applied to teaching scene
Wireless video optical projection system.
Background technique
The prior art of wireless video is related to a bit, as CN201711465031.4 discloses a kind of audio-video collection system
System, including camera, the camera is interior to be equipped with audio collection module, audio A/D conversion module, video acquisition module, video
A/D conversion module, Data Synthesis encrypting module, microprocessor, wireless transport module, memory, loudspeaker, display screen and power supply
Circuit, audio collection module collected sound signal simultaneously sends it to user, but its audio-video collection system, and is hardware design
It is related.
CN201711099354.6 discloses a kind of method and apparatus of video playing.Method includes：Curricula is obtained,
Wherein, curricula includes the incidence relation between multiple videos and each video, wherein includes at least and plays in incidence relation
Ordinal relation；From the video address for obtaining each video in multiple videos in server；Different players is controlled according to broadcasting
Ordinal relation accesses video address, plays the multiple videos for including in curricula, wherein different players is suitable according to playing
Order relation plays different videos at preset time point.By the application, solves the video content played in the related technology
Relevance is poor, the low problem of user experience.It is not broadcast live, the video resource on Play Server.
CN201711280396.X:Video acquisition system, including photographic device, data collector, outdoor wireless bridge, number
According to storage server and monitoring center computer, photographic device, data collector pass through outdoor wireless bridge and connect data storage
Server and monitoring center computer, outdoor wireless bridge are NanoStation2/5, monitoring center computer connection alarm dress
It sets.The scene used is video monitoring, camera be it is fixed, be not suitable for scene of imparting knowledge to students, and shooting end cannot be long-range
Control plays end.
During exchanging, investigating with school, teacher has the video file that will be generated in class to be uploaded in teaching electronic brain
Demand, so that schools watch.
It is directed to the solution of existing issue proposition, is accomplished：1, real using the camera function of iPad (or smart phone)
When video data is wirelessly transferred into the computer of windows system, and be shown on the large screen before classroom；2, by iPad (or
Smart phone) video file in photograph album, it radios to and is played in the computer of windows system.
It solves the problems, such as：Previous teacher does physics and chemical experiment on dais, and sit subsequent classmate can't see completely.Make
With this system, full class classmate can be allowed to see by the process live fluoroscopic to large screen of experiment.Previous fine arts lessons, classmates
It paints on paper, after finishing, teacher can only show the result that a width is drawn.Using this system, the process that classmate can be painted is clapped
It photographs and, and in wireless display to large screen, so that other classmates watch.
Similar technology and advantage and disadvantage：Similar technology has, the airplay technology of apple, compared with this system：
1, Airplay needs the hardware supported of apple, very bad to the compatibility of windows；
2, Airplay can only real-time transmission of video data, cannot replay.
Another projection is the mode for turning hdmi using usb, compared with this system：
1, this is a kind of wired mode, can accomplish low latency, the video pictures of high quality；
2, because be it is wired, will limit the scope of activities of user, be not suitable for teaching scene；
3, can only real-time transmission of video data, cannot replay.
Summary of the invention
In order to solve the problems existing in the prior art, the object of the present invention is under windows system environments, by ipad
The video flowing real-time Transmission generated in real time in (or smart phone) is to windows, and main there are two application scenarios：First is
The real-time Transmission of ipad (or smart phone) camera video stream, the other is in ipad (or smart phone) photograph album video reality
When transmit.We can accomplish, the real-time Transmission of video, the wireless transmission of video, the preservation of video, video playback, and have
There is platform portable.
The technical scheme is that：It is a kind of applied to teaching scene wireless video optical projection system, using pad (or intelligence
Mobile phone refers to the display equipment of audio and video module and WIFI module with embedded or CPU control) equipment, it can be with real-time Transmission
Video flowing can also be interacted with the end windows program, be more suitable for teaching scene.
It include three hardware bodies in system architecture based on following system：IPad (or smart phone) hardware, Windows
Computer hardware and wireless router hardware；
Wherein, iPad (or smart phone) hardware is mounted with iPad of the present invention (or smart phone) client software, is used for
The shooting of video, and video flowing is pushed away to Windows computer client, meanwhile, also support long-range control Windows computer client
End；
Windows computer hardware is mounted with window client software of the present invention, and has built Nginx streaming media service
Device, for the reception of video, the broadcasting of video, the storage etc. of video；
Wireless router hardware is the bridge that iPad (or smart phone) client is communicated with window client, is responsible for
The transmission of data.
Step 1:Using wireless router, a WLAN is established, guarantees window client and iPad (or intelligence
Can mobile phone) client is connected into the WLAN；
Step 2:Streaming media server is built using nginx in window client：
1, nginx and streaming media service module are installed；Download nginx, download address：http://nginx.org/en/ download.html, and install.Nginx is web server software；
2, nginx streaming media server is configured, wherein the port of streaming media service is that the port of 55100, http service is
55101, and the process of streaming media service is specified using pid.After configuration is good, start nginx streaming media service.
Pid refers to the fuzzy rate controller for supporting streaming media, and pid, full name is process id, i.e. process id
Step 3:The video in camera real-time video or system photograph album is compiled in iPad (or smart phone) client
Code, is transferred to window client by WLAN (wireless WIFI):
1, for the real time video collection of camera, apple provides VideoToolKit in iOS 8.0 and system above
And AudioToolKit hard coded library, it calls directly and just can be carried out efficient hard coded；
Or the library LFLiveKit is used, camera real-time video can efficiently be encoded and network transmission；
2, for the video file in system photograph album, coding and network transmission are carried out using the library FFmpeg；
3, network transmission uses RTMP agreement, data volume very little；
4, user's operation iPad (or smart phone) starts camera live fluoroscopic or photograph album selection video file projection
When, iPad (or smart phone) notifies window client to start playing network streaming by TCP control command channel, then opens
Begin to execute video process flow；When user's operation iPad (or smart phone) stops transmitting, iPad (or smart phone) passes through
Command channel notifies window client to stop playing network streaming；
5, after window client receives video data, not distinguishing is camera video data or photograph album video
Data directly play.Convenient for being uniformly processed；
6, the video process flow of iPad (or smart phone) client is as follows：The view of iPad (or smart phone) client
Frequency process flow
RTMP (Real Time Messaging Protocol) real-time messages transportation protocol be player and server it
Between audio, video and data transmission exploitation open protocol.
Step 4:DST PLAYER is built using libVLC in window client：
1, using libVLC, there are two types of modes：Source code (the download address of the first compiling vlc：http:// www.videolan.org/vlc/download-sources.html), second is using compiled file (downloading ground
Location：http://www.videolan.org/)；
2, necessary file is copied to engineering catalogue, is used for secondary development
(1) dynamic link library * .dll：Libvlc.dll, libvlccore.dll and plugins under installation directory
All Files under catalogue,
(2) static link library * .lib：Installation directory/sdk/lib,
(3) header file * .h：Installation directory/sdk/include
3, using libVLC secondary development, interface process for using is as follows：
4, a local player is developed using libVLC, supports to play, pause, stop, F.F., rewind, progress is aobvious
Show, volume adjustment, the functions such as playlist.
Step 5:Build window client video database
1, the video flowing of iPad (or smart phone) client transmissions is preserved in window client, generates one
A mp4 file, video file name are named with the time, are accurate to the second；
2, a local data base is established in window client, by the storage of video file path into database；
3, when playing back video on window client, corresponding video text is searched out in database according to video serial number
Part path is loaded into libVLC player and plays back.
Step 6:IPad (or smart phone) client remote controls window client and plays
1, iPad (or smart phone) client and window client establish TCP connection；
2, iPad (or smart phone) client sends message to window client, is used to long-range control Windows
Client；
It 3, can be by remotely realizing following functions in iPad (or smart phone) client：It plays, pause, stop,
F.F., rewind, progress show, volume adjustment, the functions such as playlist.
Beneficial effect：Compared with prior art, remarkable advantage and the effect of formation：
(1) present invention realizes the wireless transmission of data, allows teacher when classroom is given lessons by deployment wireless router,
Can walk about teaching；
(2) present invention is protected by being encoded using FFmpeg to video flowing in iPad (or smart phone) client
While demonstrate,proving video high-definition live broadcasting and play more smooth, network bandwidth requirements are dropped to 150KB/s hereinafter, making video flowing
Window client quickly can be transferred to by WLAN；
(3) present invention builds streaming media server by nginx, has window client and receives video flowing
Ability, and can Initiative Inventory Management receives in the form of a file video stream file；
(4) present invention builds DST PLAYER by libVLC, allows window client to have and plays video flowing
Ability also has the ability for playing local video file, student can be allowed to see video image on large screen；
(5) present invention realizes the storage of video, can return at any time by building window client video database
Put all videos of iPad (or smart phone) client upload；
(6) technologies such as Nginx, FFmpeg, libVLC that the present invention uses are all based on Open Framework, and have across flat
The characteristic of platform can theoretically be transplanted to the operating platforms such as Linux, Mac OS so having very strong transplantability.
Detailed description of the invention
Fig. 1 is block diagram of the present invention；
Fig. 2 hardware disposes schematic diagram.
Fig. 3 is the video process flow of iPad (or smart phone) client.
Fig. 4 uses libVLC secondary development, interface process for using.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in more detail.
Fig. 2 is that hardware disposes schematic diagram in the embodiment of the present invention, includes three hardware bodies in the system architecture： iPad
(or smart phone) hardware 2, Windows computer hardware 3 and wireless router hardware 1.
Wherein, iPad (or smart phone) hardware is mounted with our iPad (or smart phone) client software, is used for
The shooting of video, and video flowing is pushed away to Windows computer client, meanwhile, also support long-range control Windows computer client
End.
Windows computer hardware, is mounted with our window client software, and has built Nginx streaming media service
Device, for the reception of video, the broadcasting of video, the storage etc. of video.
Wireless router hardware is the bridge that iPad (or smart phone) client is communicated with window client, is responsible for
The transmission of data.
The systematic difference scene, specific steps have：
Step 101：Windosw computer is connected on router, window client software is opened；
Step 102：IPad (or smart phone) is connected on router, and opens iPad (or smart phone) client
Software establishes TCP connection with window client；
Step 103：Teacher opens the video record function of iPad (or smart phone) client, and system can be automatically by video
It projects on window client, is watched for classmates collective；
Step 104：Teacher can also open the video file selection function of iPad (or smart phone) client, with selection
Want the video file for being uploaded to window client, window client can play video in real time, see for classmates collective
It sees；
Step 105：Teacher can play back the video that played by operation iPad (or smart phone) client；
Step 106：Teacher can suspend video, be stopped during video playing, F.F., rewind, volume
The operation such as adjusting.
Step 2:Streaming media server is built using nginx in window client：
1, nginx and streaming media service module are installed
Download nginx, download address：http://nginx.org/en/download.html, and install.
2, nginx streaming media server is configured, configuration file is as follows：
Wherein, it is 55101 that the port of streaming media service, which is the port of 55100, http service, and specifies stream using pid
The process of media services.
After configuration is good, start nginx streaming media service.
Step 3:The video in camera real-time video or system photograph album is compiled in iPad (or smart phone) client
Code, is transferred to window client by wireless WIFI:
1, for the real time video collection of camera, apple provides VideoToolKit in iOS 8.0 and system above
And AudioToolKit hard coded library, it calls directly and can be carried out efficient hard coded.We use LFLiveKit
Better encapsulation has been done in library, the library, can efficiently be encoded to camera real-time video and network transmission；
2, for the video file in system photograph album, we encode using the library FFmpeg and network transmission；
3, network transmission we use highly developed RTMP agreement, data volume very little；
4, user's operation iPad (or smart phone) starts camera live fluoroscopic or photograph album selection video file projection
When, iPad (or smart phone) notifies window client to start playing network streaming by TCP control command channel, then opens
Begin to execute video process flow.When user's operation iPad (or smart phone) stops transmitting, iPad (or smart phone) passes through
Command channel notifies window client to stop playing network streaming；
5, after window client receives video data, not distinguishing is camera video data or photograph album video
Data directly play.Convenient for being uniformly processed；
6, video process flow Fig. 3 of iPad (or smart phone) client.
Although the present invention has been disclosed as a preferred embodiment, however, it is not to limit the invention.Skill belonging to the present invention
Has usually intellectual in art field, without departing from the spirit and scope of the present invention, when can be used for a variety of modifications and variations.Cause
This, the scope of protection of the present invention is defined by those of the claims.
Claims (4)
1. a kind of wireless video optical projection system applied to teaching scene, characterized in that be based on following system, wrapped in system architecture
Containing three hardware bodies：IPad or smart phone, Windows computer and wireless router；
Wherein, iPad or smart phone are mounted with iPad or smart phone client software of the present invention, for the shooting of video,
And video flowing is pushed away to Windows computer client, meanwhile, also support long-range control Windows computer client；
Windows computer is mounted with window client software of the present invention, and has built Nginx streaming media server, is used for
The reception of video, the broadcasting of video, the storage of video；
Wireless router is iPad or the bridge that smart phone client is communicated with window client, is responsible for the biography of data
It is defeated；Steps are as follows：
Step 1:Using wireless router, establish a WLAN, guarantee window client, that is, Windows computer and
IPad or smart phone client are connected into the WLAN；
Step 2:Streaming media server is built using nginx in window client：
1) nginx and streaming media server module are installed；
2) nginx streaming media server is configured, wherein the port of streaming media service is that the port of 55100, http service is
55101, and the process of streaming media service is specified using pid；After configuration is good, start nginx streaming media service；
Step 3:In iPad or smart phone client the Video coding in camera real-time video or photograph album, by wireless
Local network transport is to window client:
1) for the real time video collection of camera, apple iOS 8.0 and system above provide VideoToolKit and
AudioToolKit hard coded library, calls directly and just can be carried out efficient hard coded；
Or the library LFLiveKit is used, camera real-time video can efficiently be encoded and network transmission；
2) for the video file in system photograph album, coding and network transmission are carried out using the library FFmpeg；
3) network transmission uses RTMP agreement, data volume very little；RTMP is real-time messages transportation protocol, is player and server
Between audio, video and data transmission exploitation open protocol；
4) when user's operation iPad or smart phone start to select video file projection in camera live fluoroscopic or photograph album,
IPad or smart phone notify window client to start playing network streaming by TCP control command channel, then start to execute
Video process flow；When user's operation iPad (or smart phone) stops transmitting, iPad or smart phone pass through command channel
Window client is notified to stop playing network streaming；
5) after window client receives video data, not distinguishing is camera video data or photograph album video data,
It directly plays, is uniformly processed；
6) iPad or the processing of the video of smart phone client.
2. the wireless video optical projection system according to claim 1 for being applied to teaching scene, characterized in that
DST PLAYER is built using libVLC in window client：
1) using libVLC, there are two types of modes：The source code of the first compiling vlc, second is using compiled file；
2) necessary file is copied to engineering catalogue, is used for secondary development
(1) dynamic link library * .dll：Under libvlc.dll, libvlccore.dll and plugins catalogue under installation directory
All Files,
(2) static link library * .lib：Installation directory/sdk/lib,
(3) header file * .h：Installation directory/sdk/include
3) libVLC secondary development is used；
4) a local player is developed using libVLC, supports to play, pause, stop, F.F., rewind, progress is shown, sound
Amount is adjusted, playlist functionality.
3. the wireless video optical projection system according to claim 1 for being applied to teaching scene, characterized in that build
Window client video database：
1) video flowing of iPad (or smart phone) client transmissions is preserved in window client, generates a mp4
File, video file name are named with the time, are accurate to the second；
2) a local data base is established in window client, by the storage of video file path into database；
3) when playing back video on window client, corresponding video file road is searched out in database according to video serial number
Diameter is loaded into libVLC player and plays back.
4. the wireless video optical projection system according to claim 1 for being applied to teaching scene, characterized in that iPad client
Long-range control window client plays：
1) iPad (or smart phone) client and window client establish TCP connection；
2) iPad (or smart phone) client sends message to window client, is used to long-range control Windows client
End；
It 3) can be by remotely realizing following functions in iPad (or smart phone) client：It plays, pause, stop, F.F.,
Rewind, progress show, volume adjustment, the functions such as playlist.
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| US11212329B2 (en) | 2020-05-28 | 2021-12-28 | Wangsu Science & Technology Co., Ltd. | Method, apparatus, device and storage medium for pushing video stream |
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