CN116993285A - Online teaching platform, method and storage medium for multiple users - Google Patents
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Abstract
The invention provides an online teaching platform, method and storage medium for multiple users, belonging to the technical field of teaching platforms, wherein the constructed online teaching platform adopts a mode of packaging independent functional modules and instantiating and calling to execute module functions, and the platform comprises the following modules: the system comprises a user creation module, an interaction module, a live broadcast module and a supervision module. According to the invention, by constructing a one-stop online teaching platform, teaching resources are effectively integrated, meanwhile, the defect of live broadcast teaching is perfected, the scene of offline teaching is truly restored, and zero-distance immersive interactive experience is realized.
Description
Technical Field
The invention belongs to the technical field of teaching platforms, and particularly relates to an online teaching platform, method and storage medium for multiple users.
Background
With the development of computer technology, the acquisition of teaching resources is not limited to simple paper documents, offline teachers and students, popularization of electronic materials and popularization of online query tools, so that the learning approach is simple and rich.
In the era of the appearance of a large number of teaching resources, the existing online teaching resources are scattered, the integration degree is not high, the resource utilization rate is low, multiple resources are displayed, and the phenomenon that the resources cannot be used is caused.
Disclosure of Invention
The invention aims to: an online teaching platform, method and storage medium for multiple users are provided to solve the above problems in the prior art. Through constructing the online teaching platform of one station formula, effectively reach the integration with teaching resource, perfect the drawback of live broadcast teaching simultaneously, truly restore the scene of teaching off line, realize the immersive interactive experience of zero distance.
The technical scheme is as follows: in a first aspect, an online teaching platform for multiple users is provided, where the online teaching platform uses a function module that is independent of a package, and implements a module function by instantiating and calling, and the online teaching platform includes the following modules:
the user creation module is arranged to create different user roles according to different requirements;
the interaction module is arranged to perform online intercommunication among different roles in the teaching process;
the live broadcast module is arranged for executing online live broadcast teaching in the teaching process;
and the supervision module is used for supervising the teaching content in the teaching process.
In some implementations of the first aspect, in deploying the online teaching platform, two network segments of the internet and the regional network are divided; in the Internet section, a public network IP address is adopted, and various intelligent terminals of the Internet are provided with services; in the directed area network segment, management signaling between servers and internal media streaming are performed.
In the process of executing the functional module of the online teaching platform, the online teaching platform further comprises the following components:
the system comprises an RTC audio and video engine, an RTC screen combination engine, an RTC scheduling engine, a data service component, an RTC recording and rebroadcasting engine, an RTC signaling service component, an RTC distribution engine and a client SDK; the RTC audio and video engine, the RTC screen combination engine, the RTC scheduling engine and the data service component are all designed in a stateless mode.
In order to improve the security of teaching resources and reduce the possibility of illegal theft, the online teaching platform further comprises a security verification module for executing signature check when a user sends a teaching resource reading request.
In a second aspect, based on a constructed online teaching platform, an online teaching method for multiple users is provided, and the method comprises the following steps:
step 1, creating different user roles, including: teacher, student, teaching, and listener;
step 2, reading the requirements of different user roles in the teaching process;
step 3, executing different functions according to the requirements of the user roles in step 2, including: live teaching, interactive teaching, course playback, hearing, and data viewing.
In some implementations of the second aspect, in order to reduce the phenomenon that the teaching resource is illegally stolen during the process of executing the teaching activity and reading the teaching resource, the method further includes the following steps:
step (1), a user terminal sends a resource request to an online teaching platform;
step (2), the online teaching platform judges whether the user terminal sending the request is a legal user or not according to the received resource request; when the judgment result is legal, jumping to the step (3); otherwise, refusing the playing request and ending the current flow;
step (3), the online teaching platform signs the playing chain in real time through an encryption algorithm to generate an anti-theft chain;
step (4), the anti-theft chain signed in the step (3) is sent to a playing terminal of the user terminal;
step (5), the user terminal requests playing from the RTC distribution engine through the signed anti-theft chain;
step (6), the RTC distribution engine shares the anti-theft chain encryption algorithm and the anti-theft chain KEY file, and performs validity check on the resource request;
step (7), when the checking result of the step (6) is legal, providing corresponding request service for the user terminal; otherwise, the provisioning is refused and the error is reported.
In some realizable modes of the second aspect, in the process of executing interactive teaching, a teacher monitors the learning state of the student in real time in a polling mode and can carry out continuous-time asking and answering with the student as required; the interactive teaching process comprises the following steps:
s1, a student end acquires course information;
s2, if the course is in progress, the student can enter the course and synchronize the state of the student to the RTC signaling service, and simultaneously synchronize the states of other people;
s3, if the student is a lesson-listening student, subscribing a master speaker signal in the WebRTC format from the RTC audio-video engine; when the student is connected with the microphone, the student pushes own audio and video signals through the RTC audio and video engine, so that interaction with a main speaker is realized;
s4, if 'screen closing rebroadcasting' is started when an interactive course is created, starting an 'RTC push engine' by the system, acquiring screen closing signals from the screen closing engine to an RTC distribution engine, and subscribing screen closing signals in an HLS format from the RTC distribution engine by bystanders;
and S5, when the recording is finished, the student client can watch the recorded content through the storage system.
The live teaching process comprises the following steps:
s1, a student end acquires course information;
s2, if the course is in progress, the student can enter the course and synchronize the state of the student to the RTC signaling service, and simultaneously synchronize the states of other people;
s3, subscribing a screen-closing signal in an HLS format from the RTC distribution engine by the students;
and S4, when the recording is finished, the student client can watch the recorded content through the storage system.
In addition, in the process of executing live interaction teaching, if an interaction process occurs, the method comprises the following steps:
step I, a student client initiates a hand lifting signaling and notifies an RTC signaling service;
step II, the RTC signaling service informs the teacher client that the student lifts hands;
step III, the teacher sends the wheat connecting signaling through the RTC signaling service;
step IV, the RTC signaling service informs students of wheat connection;
step V, the student client side issues a WebRTC signal to the RTC audio and video engine;
and VI, subscribing the WebRTC signal by the student client side, so as to realize audio and video interaction.
In a third aspect, a computer-readable storage medium having computer program instructions stored thereon is presented. The computer program instructions, when executed by the processor, implement an on-line teaching method.
The beneficial effects are that: the invention provides an online teaching platform, method and storage medium for various users, which are based on rapid development of the Internet, realize innovation of unidirectional media transmission to bidirectional real-time interaction, effectively integrate teaching resources by constructing a one-stop online teaching platform, simultaneously perfect the defect of live broadcast teaching, truly restore the scene of offline teaching and realize zero-distance immersive interaction experience.
Drawings
FIG. 1 is a schematic view of a platform frame according to the present invention.
Fig. 2 is a flow of resource reading based on the anti-theft chain.
FIG. 3 is a timing diagram of determining whether a user is legitimate according to the present invention.
Fig. 4 is a flow chart of the student's end participating in the teaching activity.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the invention.
Example 1
In one embodiment, in response to the requirement of online immersive teaching, an online teaching platform for multiple users is provided, and as shown in fig. 1, the platform includes the following modules: the system comprises a user creation module, an interaction module, a live broadcast module and a supervision module. The user creation module is used for creating different user roles according to different requirements; the interaction module is used for executing online intercommunication among different roles in the teaching process; the live broadcast module is used for executing online live broadcast teaching in the teaching process; the supervision module is used for supervising the teaching content in the teaching process.
Different functional modules are arranged in the online teaching platform in a packaging mode, so that downstream fusion resources are invisible to upper-layer services, the supporting capacity of the platform is effectively improved, and users experience ultra-low delay and new experience of cross-terminal services brought by an IP platform. In the preferred embodiment, in order to meet the concurrent demands of multiple live courses and the interaction of multiple students in the live teaching process, the constructed teaching platform is further selected from computational hardware, network I/O (input/output) hardware and storage space hardware on the aspect of hardware configuration. After hardware selection is completed, an ESXi virtualization environment is deployed, and a multi-instance virtual machine is operated to meet performance requirements in a live broadcast process.
Aiming at the constructed online teaching platform, in the deployment process, two network segments of the Internet and the directional regional network are divided. In the preferred embodiment, in the deployment process of the platform, the platform is divided into an Internet section and a Jiangsu radio and television private network, wherein the Internet section adopts a public network IP address for providing services for various intelligent terminals of the Internet and adopts a professional firewall for providing security protection. The directional regional network is used for providing service for intelligent set top boxes or other intelligent devices in Jiangsu radio and television inner networks, and is also used for management signaling and internal media stream transmission among servers.
In the process of executing the functional module of the online teaching platform, the online teaching platform further comprises the following components: the system comprises an RTC audio and video engine, an RTC screen combination engine, an RTC scheduling engine, a data service component, an RTC recording and rebroadcasting engine, an RTC signaling service component, an RTC distribution engine and a client SDK; the RTC audio and video engine, the RTC screen combination engine, the RTC scheduling engine and the data service component are all designed in a stateless mode.
Specifically, the RTC audio and video engine is a streaming media gateway server based on WebRTC, establishes point-to-point session with various terminals at the same time, and is responsible for carrying out directional encryption forwarding on audio and video data packets sent by each terminal, so that real-time video communication among multiple terminals is realized.
The RTC signaling service component is a set of message channels for audio and video communication and low-delay live broadcast service, and is used for carrying out service isolation based on rooms. In the same room, the terminals are responsible for login/logout, state synchronization, custom control signaling, instant text messaging and the like.
The RTC screen combination engine is responsible for complex processing such as pulling, decoding, screen combination, audio mixing, screenshot, recoding and the like of multiple WebRTC videos in the RTC video and audio engine, allows each terminal to directly acquire the audio and video after screen combination and audio mixing, and reduces the performance requirements of the terminal in a specific application scene.
The RTC rebroadcasting engine is a streaming media protocol gateway and is responsible for mutual conversion between the WebRTC stream and other various streaming media protocol streams (such as RTMP, SRT, UDP, HLS and the like), so that the interconnection and the intercommunication of an RTC system and other streaming media systems are realized.
The RTC distribution engine is a low-delay live broadcast distribution system, provides real-time mass distribution of audio and video signals, and simultaneously supports HTTP FLV live broadcast, webRTC live broadcast and HLS live broadcast of the main stream in the industry. A distributed architecture supporting distributed deployment and multi-level merging back sources. In a preferred embodiment, low-latency live broadcast distribution based on WebRTC protocol can be directly opened by a browser to view live broadcast without additional installation of an application, with an end-to-end latency <500ms.
The RTC recording engine supports high-performance multi-channel live stream recording, and can perform instant time shifting and review on live signals in recording or recorded. RTC recording engines have integrated various types of storage systems including, but not limited to, local storage, NAS, alicloud OSS, messenger cloud COS, AWS S3, and the like.
The RTC scheduling engine intelligently distributes various classes of tasks to the most appropriate RTC engine based on factors in multiple dimensions such as the user IP address, the user area, and the load of the RTC engine. User-oriented requests support a DNS or HTTP DNS based scheduling pattern. Meanwhile, the method supports audio and video interaction between various terminals in an intranet environment and an Internet environment, adopts intranet IP direct service for intranet users, and adopts public network NAT addresses for external network users to serve. The multi-line machine room of the external network can be connected by the special line, and the external network user can automatically access the IP of telecommunication, mobile and communication according to the position of the external network user, namely the dispatching of the multi-IP address of the equipment. The teaching rate of the interactive live broadcast teaching is calculated according to 2 Mbps/path. In addition, in the intelligent scheduling section, the client SDK may first query the scheduling engine for the IP address of the subsystem before accessing a certain functional module. The scheduling engine will analyze the IP address of the client and return the most appropriate IP address based on the policy.
The client SDK comprises an Android, iOS, a Web development kit and Demo source codes, and aims to assist a third party application in more conveniently calling the capability of an online teaching platform and independently developing an application program.
The one-stop online teaching platform constructed by the embodiment is oriented to different user objects, integrates schools, teachers, students and courses into a whole by combining the teaching requirements of interactive live broadcast, and restores the scene of offline teaching to a great extent, so that zero-distance immersive interactive experience is realized. Meanwhile, the constructed teaching platform is based on a cloud platform architecture, a distributed construction mode is adopted for a bottom architecture, and the capability platform and the interactive live broadcast teaching platform are independent into a single module, so that sharing and sharing of the follow-up capability platform under different application scenes are facilitated. In addition, according to the maintenance requirement of the platform, the monitoring operation and maintenance support module is further constructed, and the service quality of each live course can be effectively traced, so that the sustainable optimization is realized.
Example two
In a further embodiment based on the first embodiment, in order to reduce the situation that the teaching platform is illegally stolen when executing the teaching live broadcast, the embodiment further constructs a security verification module, and the module executes signature checking when the user sends out the live broadcast or the review request, thereby ensuring that only legal users can obtain teaching resources.
In a further embodiment, the online teaching platform constructed in the embodiment is an end-to-end clouding software system integrating audio and video communication and low-delay live broadcast distribution, and can provide bottom-layer capacity service for scenes such as online live broadcast classroom, television program connection, family conversation, video conference, remote command, video customer service and the like. The platform is based on the WebRTC framework, and is matched with an own optimized transmission protocol to create optimal transmission efficiency and interaction experience for clients on an IP network. The system supports the deployment of elastic nodes of public cloud or private cloud, can federate the capability of third party cloud service providers, and provides more network coverage and flexible performance expansion for the whole platform.
In a typical interactive course, as shown in fig. 4, the superschool student exchanges WebRTC signal streams with the teacher through the RTC audio-video engine, and the RTC rebroadcasting engine acquires WebRTC streams from the RTC audio-video engine, and the WebRTC streams are transcoded and then pushed to the RTC recording engine or the RTC distribution engine, so that the students in the lesson watch WebRTC signals through the RTC distribution engine. Through RTC signaling service, students in class can switch to the student on wheat seamlessly. And the screen combining engine performs screen combining and sound mixing on each path of signals connected with the wheat.
Example III
In one embodiment, based on the online teaching platform provided by the embodiment, an online teaching method is provided, and the method comprises the following steps:
step one, creating different user roles, comprising: teacher, student, teaching, and listener;
step two, reading the requirements of different user roles in the teaching process;
step three, executing different functions according to the requirements of the user roles in the step two, including: live teaching, interactive teaching, course playback, hearing, and data viewing.
In a further embodiment, in order to improve the security of the teaching resources and reduce the leakage of the teaching resources caused by hotlinking, the signature check is performed when the user issues a demand for live broadcasting or review.
Specifically, as shown in fig. 2, when executing the teaching resource playing request, the method includes the following steps:
step 1, a user terminal sends a resource request to an online teaching platform; wherein the resource request includes, but is not limited to, a live broadcast address and a review broadcast address;
step 2, the online teaching platform judges whether the user terminal sending the request is a legal user or not according to the received resource request; when the judgment result is legal, jumping to the step 3; otherwise, refusing the playing request and ending the current flow;
step 3, the online teaching platform signs the playing chain in real time through an encryption algorithm to generate an anti-theft chain;
step 4, the anti-theft chain signed in the step 3 is sent to a playing terminal of the user terminal;
step 5, the user terminal requests playing from the RTC distribution engine through the signed anti-theft chain;
step 6, the RTC distribution engine shares an anti-theft chain encryption algorithm and an anti-theft chain KEY file, and performs validity check on the resource request;
step 7, when the checking result of the step 6 is legal, providing corresponding request service for the user terminal; otherwise, the provisioning is refused and the error is reported.
As shown in fig. 3, to determine whether the user is a legal user, it can be seen that the on-line teaching platform verifies the basic information of the user, and the distribution engine verifies the authenticity of the anti-theft chain.
In the preferred embodiment, the signature field for generating the anti-hotlink includes U, E, A, K, P and S six fields, where E represents the timeout time of the link, in UTC (Coordinated Universal Time, universal time) format; u denotes a session ID (SessionID), which is used when using a ses-based anti-hotlink; a represents a signature algorithm, when the value is 1, represents an SHA1 hash algorithm, and when the value is 2, represents an MD5 hash algorithm; k represents what Key in the Key List is used; p denotes signing algorithms using several parts in the URL (the original URL always includes); s represents the signature TOKEN, i.e. the signature TOKEN hashed by the algorithm defined by A according to the part of the URL defined by P and the KEY specified by K.
Based on the defined signature field, the address of the generated anti-theft chain after signature is: http:// < original URL >? In this embodiment, e= < Value > & u= < Value > & a= < Value > & k= < Value > & p= < Value > & s= < Value >, key management of the anti-hotlink scheme is not limited to a single Key, but a list of keys may be composed of n keys. The number of keys in the use list is represented by the value of K of the signature. And periodic Key updates are also based on the entire Key list, rather than individual keys. The online teaching platform can randomly select the value of A, K, P to encrypt the signature, so that the aim of difficult cracking is fulfilled.
In a further embodiment, the old chain Key is often being used by some users when the chain Key is updated, and if it fails immediately, it affects the user that is playing.
In order to realize seamless anti-theft chain Key updating, when a Key list is to be updated, a Key management server generates an equal number of new Key lists, and the new Key lists and the original Key lists are combined into a double number of Key lists. When the Key list is updated, the content distribution system performs signature encryption on keys in the updated Key list for all new requests. The CDN system ensures that both the old Key list and the new Key list can be serviced within a certain settable time (e.g., 1 day), and after the set time is exceeded, the old Key list is set to be invalid. Thus, seamless Key list updating is completed.
In a further embodiment, when creating the user role, the method further comprises creating a supervision user, wherein the supervision user realizes the monitoring requirement in the teaching process through a supervision channel provided by the online teaching platform, and meets the service required by different roles on the online education platform.
In addition, in order to facilitate the later viewing of the teaching process, the course is recorded in the process of executing the teaching, and a review link is formed after the recording is finished. The RTC rebroadcasting engine converts the WebRTC signal into RTMP and pushes the RTC signal to the RTC recording engine, and the recording engine segments the stream and stores the segmented stream into a local or cloud storage in a TS (transport stream) segment mode.
Example IV
In a further embodiment based on the third embodiment, in the process of executing the teaching activities, a teacher monitors the learning state of the students in real time in a polling mode, and can carry out continuous-time question and answer with the students as required. In the interaction class, the method comprises the following steps:
s1, a student end acquires course information;
s2, if the course is in progress, the student can enter the course and synchronize the state of the student to the RTC signaling service, and simultaneously synchronize the states of other people;
s3, if the student is a lesson-listening student, subscribing a master speaker signal in the WebRTC format from the RTC audio-video engine; when the student is connected with the microphone, the student pushes own audio and video signals through the RTC audio and video engine, so that interaction with a main speaker is realized;
s4, if 'screen closing rebroadcasting' is started when an interactive course is created, starting an 'RTC push engine' by the system, acquiring screen closing signals from the screen closing engine to an RTC distribution engine, and subscribing screen closing signals in an HLS format from the RTC distribution engine by bystanders;
and S5, when the recording is finished, the student client can watch the recorded content through the storage system.
In a further embodiment, a teacher can monitor staff and enumerate a staff list when opening a screen closing rebroadcast in the process of interactive teaching, and in a live-broadcast course, students cannot monitor bystander students and enumerate bystander students because the students only live in one way and cannot interact.
Example five
In a further embodiment based on the third embodiment, in order to promote education equalization and solve the problems of weak teaching ability of teachers and low professional development level, in the process of executing live teaching based on an on-line teaching platform, signals of a speaker are pushed to an RTC distribution engine through an RTC push engine, and a bystander SDK views unidirectional live HLS signals. The method specifically comprises the following steps:
s1, a student end acquires course information such as course names, course states and the like;
s2, if the course is in progress, the student can enter the course and synchronize the state of the student to the RTC signaling service, and simultaneously synchronize the states of other people;
s3, subscribing a screen-closing signal in an HLS format from the RTC distribution engine by the students;
and S4, when the recording is finished, the student client can watch the recorded content through the storage system.
In a further embodiment, since the live course requires starting the RTC rebroadcasting engine, the "on screen rebroadcasting" must be selected when creating the course, otherwise it cannot be viewed. And opening a class link and a bystander link after screen closing and turning and pushing are all unidirectional live broadcast viewing pages, and the viewing stream is in an HLS format.
Example six
In a further embodiment based on the third embodiment, when the teaching activity needs to be performed during the live broadcast, the method includes the following steps:
step I, a student client initiates a hand lifting signaling and notifies an RTC signaling service component;
step II, the RTC signaling service component informs the teacher client that the student lifts hands;
step III, the teacher sends the wheat connecting signaling through the RTC signaling service component;
step IV, the RTC signaling service informs students of wheat connection;
step V, the student client side issues a WebRTC signal to the RTC audio and video engine;
and VI, subscribing the WebRTC signal by the student client side, so as to realize audio and video interaction.
In a further embodiment, in the process of executing the interaction, when the network environment does not meet the communication requirement, the audio signal is preferentially transmitted, so that the voice interaction is met.
As described above, although the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limiting the invention itself. Various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The on-line teaching platform for multiple users is characterized in that the on-line teaching platform adopts a mode of packaging independent functional modules and instantiating calling to execute module functions, and comprises the following modules:
the user creation module is arranged to create different user roles according to different requirements;
the interaction module is arranged to perform online intercommunication among different roles in the teaching process;
the live broadcast module is arranged for executing online live broadcast teaching in the teaching process;
and the supervision module is used for supervising the teaching content in the teaching process.
2. The on-line teaching platform for multiple users according to claim 1, wherein in the process of deploying the on-line teaching platform, two network segments of the internet and the regional network are divided;
in the Internet section, a public network IP address is adopted, and various intelligent terminals of the Internet are provided with services;
in the directed area network segment, management signaling between servers and internal media streaming are performed.
3. The on-line teaching platform for multiple users according to claim 1, wherein the process of executing the functional modules of the on-line teaching platform further comprises the following components:
the system comprises an RTC audio and video engine, an RTC screen combination engine, an RTC scheduling engine, a data service component, an RTC recording and rebroadcasting engine, an RTC signaling service component, an RTC distribution engine and a client SDK;
the RTC audio and video engine, the RTC screen combination engine, the RTC scheduling engine and the data service component are all designed in a stateless mode.
4. The on-line teaching platform for multiple users according to claim 1, wherein the on-line teaching platform further comprises a security verification module for performing signature checking when a user issues a teaching resource reading request.
5. An online teaching method for multiple users based on the online teaching platform according to any of claims 1-4, comprising the following steps:
step 1, creating different user roles;
step 2, reading the requirements of different user roles in the teaching process;
step 3, executing different functions according to the requirements of the user roles in the step 2;
the user roles include: teacher, student, teaching, and listener;
the functions include: live teaching, interactive teaching, course playback, hearing, and data viewing.
6. The on-line teaching method for multiple users according to claim 5, wherein the course playback is performed by:
step (1), a user terminal sends a resource request to an online teaching platform;
step (2), the online teaching platform judges whether the user terminal sending the request is a legal user or not according to the received resource request; when the judgment result is legal, jumping to the step (3); otherwise, refusing the playing request and ending the current flow;
step (3), the online teaching platform signs the playing chain in real time through an encryption algorithm to generate an anti-theft chain;
step (4), the anti-theft chain signed in the step (3) is sent to a playing terminal of the user terminal;
step (5), the user terminal requests playing from the RTC distribution engine through the signed anti-theft chain;
step (6), the RTC distribution engine shares the anti-theft chain encryption algorithm and the anti-theft chain KEY file, and performs validity check on the resource request;
step (7), when the checking result of the step (6) is legal, providing corresponding request service for the user terminal; otherwise, the provisioning is refused and the error is reported.
7. The on-line teaching method for multiple users according to claim 5, wherein in the process of executing interactive teaching, a teacher monitors the learning state of students in real time in a polling mode and can answer with the students as required;
the interactive teaching process comprises the following steps:
s1, a student end acquires course information;
s2, if the course is in progress, the student can enter the course and synchronize the state of the student to the RTC signaling service component and synchronize the states of other people at the same time;
s3, if the student is a lesson-listening student, subscribing a master speaker signal in the WebRTC format from the RTC audio-video engine; when the student is connected with the microphone, the student pushes own audio and video signals through the RTC audio and video engine, so that interaction with a main speaker is realized;
s4, if the 'screen combination rebroadcasting' is started when the interactive course is created, starting an 'RTC recording rebroadcasting engine' by the system, acquiring screen combination signals from the screen combination engine to an RTC distribution engine, and subscribing screen combination signals in an HLS format from the RTC distribution engine by bystanders;
and S5, when the recording is finished, the student client can watch the recorded content through the storage system.
8. The on-line teaching method for multiple users according to claim 5, wherein the process of performing live teaching comprises the following steps:
s1, a student end acquires course information;
s2, if the course is in progress, the student can enter the course and synchronize the state of the student to the RTC signaling service, and simultaneously synchronize the states of other people;
s3, subscribing a screen-closing signal in an HLS format from the RTC distribution engine by the students;
and S4, when the recording is finished, the student client can watch the recorded content through the storage system.
9. The on-line teaching method for multiple users according to claim 5, wherein the process of interaction in the process of executing live interaction teaching comprises the following steps:
step I, a student client initiates a hand lifting signaling and notifies an RTC signaling service component;
step II, the RTC signaling service component informs the teacher client that the student lifts hands;
step III, the teacher sends the wheat connecting signaling through the RTC signaling service;
step IV, the RTC signaling service informs students of wheat connection;
step V, the student client side issues a WebRTC signal to the RTC audio and video engine;
and VI, subscribing the WebRTC signal by the student client side, so as to realize audio and video interaction.
10. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon computer program instructions, which when executed by a processor, implement the on-line teaching platform application method according to claims 5-9.
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