# Overview: In-Browser Video Call Module

## Purpose:
The In-Browser Video Call Module is designed to enable real-time video communication directly within a web browser, eliminating the need for external third-party applications. This module empowers educators and institutions to host live video classes, virtual office hours, and interactive learning sessions seamlessly.

## Benefits:
- **Real-Time Interaction:** Enables face-to-face video communication between instructors and students in real time, fostering dynamic and engaging classroom experiences.
- **No Third-Party Dependencies:** Integrates directly into web browsers, reducing friction for users who do not want to install or download additional software.
- **Cross-Platform Compatibility:** Works across major browsers (Chrome, Firefox, Safari, etc.) and devices, ensuring broad accessibility.
- **Scalable:** Supports varying numbers of participants, from small group discussions to large classroom settings.
- **Easy Integration:** Provides developers with APIs and tools to integrate video call functionality into existing educational platforms or learning management systems (LMS).

## Usage Scenarios:
1. **Virtual Classrooms:** Instructors can host live lectures, tutorials, and Q&A sessions directly within a web browser.
2. **Office Hours:** Students can join virtual office hours to ask questions and discuss topics one-on-one or in small groups.
3. **Collaborative Workshops:** Teams can participate in interactive workshops, group projects, or peer-to-peer learning sessions.
4. **Guest Lectures:** Institutions can invite guest speakers or experts to deliver talks without requiring them to download additional software.

## Target Use Cases:
- **Educators:** Host live classes and interact with students in real time.
- **Students:** Engage in video-based learning and collaboration directly from their browser.
- **Institutions:** Enhance online teaching capabilities by integrating video conferencing into existing platforms.

This module is a powerful tool for modern classrooms, enabling seamless, interactive, and inclusive learning experiences without the hassle of third-party apps.

Key Features of In-Browser Video Call Module

1. HD Video and Audio Streaming

Enables high-definition video and crystal-clear audio for all participants, ensuring an optimal learning experience.
Low-latency transmission ensures real-time interaction, making it ideal for live classes.

2. Participant Management

User Authentication: Secure access control to ensure only authorized users can join the session.
Moderator Controls: Allows the host (teacher) to mute/unmute participants, manage screen sharing, and remove disruptive users, maintaining classroom秩序.

3. Classroom-Specific Features

Virtual Backgrounds: Participants can use virtual backgrounds to keep the focus on teaching rather than their environment.
Interactive Whiteboard Integration: Tools for collaborative learning, such as drawing and annotating in real-time.
Breakout Rooms: Facilitate small group discussions within the larger class setup.

Screen Sharing: Teachers can share their desktop or specific applications to demonstrate concepts.
Content Annotation: Participants can annotate shared content, fostering interactive learning.

5. Integration with Learning Management Systems (LMS)

Seamless integration with popular LMS platforms for class management and tracking student participation.
Syncs attendance logs and activity reports directly into the institution’s database.

6. Reliable and Scalable Infrastructure

Built on robust infrastructure to handle varying numbers of participants without performance degradation.
Load balancing ensures smooth operation even during peak usage.

7. Recording and Playback

Classes can be recorded automatically for later review by students who missed the session.
Recordings are stored securely, ensuring data integrity and easy access.

8. Customizable Branding

Institutions can customize the module’s look with their logos, colors, and themes to align with branding efforts.

9. Security and Compliance

Secure Join Links: Password-protected or role-based access ensures only intended participants join.
Encryption: Data is encrypted during transmission to protect privacy.
Compliance: Adheres to data protection regulations like GDPR and HIPAA, ensuring legal compliance.

10. APIs for Integration

Offers APIs for developers to extend functionality, such as third-party notifications or custom workflows.
Webhooks allow integration with external systems for real-time event handling.

11. Browser and Device Compatibility

Works across major browsers (Chrome, Firefox, Safari) without requiring plugins or downloads.
Responsive design ensures compatibility with both desktop and mobile devices.

These features make the In-Browser Video Call Module a powerful tool for delivering high-quality live classes directly in the browser, enhancing engagement and accessibility for students worldwide.

In-Browser Video Call Module Documentation

Overview

The In-Browser Video Call Module enables developers to integrate live video class functionality directly into their applications without relying on third-party apps. This module supports real-time interaction and collaboration.

Server API (FastAPI)

from fastapi import FastAPI, HTTPException
from typing import Optional
from pydantic import SessionCreate

app = FastAPI()

@app.post("/session")
async def create_session(session_data: SessionCreate):
    """Creates a new video session and returns an access token."""
    # Generate a unique session ID and access token
    session_id = str(uuid.uuid4())
    access_token = generate_access_token()
    
    # Store session data in database or cache
    save_session(session_id, access_token, session_data)
    
    return {
        "status": "success",
        "message": "Session created successfully.",
        "session_id": session_id,
        "access_token": access_token
    }

Client UI (React)

import React, { useState, useEffect } from 'react';
import { useAgoraClient } from '@agoraio/react';

function VideoCall() {
  const [isHost, setIsHost] = useState(false);
  const [sessionToken, setSessionToken] = useState('');
  const agoraClient = useAgoraClient();

  async function joinSession() {
    try {
      await agoraClient.joinChannel(sessionToken);
      // Handle successful join
      setIsHost(!isHost); // Determines if the user is the host
    } catch (error) {
      console.error('Error joining session:', error);
    }
  }

  return (
    <div className="video-container">
      {isHost ? (
        <>
          <button onClick={() => createSession()}>Start Session</button>
          <UserList />
        </>
      ) : (
        <button onClick={joinSession}>Join Session</button>
      )}
      <VideoElements />
    </div>
  );
}

// Usage:
// const root = document.createElement('root');
// ReactDOM.render(<VideoCall />, root);

Data Models (Pydantic)

from pydantic import BaseModel
from datetime import datetime

class Session(BaseModel):
    """Represents a video session."""
    session_id: str
    host_id: str
    participants: list[str] = []
    status: Literal["pending", "active", "ended"] = "pending"
    start_time: datetime
    end_time: Optional[datetime]
    metadata: dict = {}
    
class SessionCreate(Session):
    """Input model for creating a new session."""
    __root__: dict
    
    def __init__(**kwargs) -> None:
        super().__init__(**kwargs)

Explanation

Server API (FastAPI)

The server defines an endpoint /session that creates a new video call session. It uses Pydantic models to validate and structure incoming data, ensuring type safety and reducing errors.

create_session: Handles creating sessions, generating tokens, and storing necessary data.

Client UI (React)

The React component integrates with video libraries like Agora.io for real-time interaction:

joinSession: Manages joining a session using an access token.
isHost state: Determines if the user is the host, affecting UI elements like starting or managing sessions.
VideoElements: Renders video feeds and interactive controls.

Data Models

Pydantic models ensure data consistency and validation:

Session: Captures all necessary attributes for a session.
SessionCreate: Input model for creating new sessions, enforcing required fields and types.

This documentation provides a foundational setup. For production use, additional features like error handling, authentication, and UI enhancements would be needed.

In-Browser Video Call Module Technical Documentation

Overview

The In-Browser Video Call Module enables live video classes directly within a web browser, eliminating the need for third-party applications. This module is designed to provide seamless integration and robust functionality for developers aiming to host interactive online sessions.

Screen Sharing Module: Allows users to share their screen during video calls.
Chat Module: Facilitates real-time text communication among participants.
Recording Module: Enables recording of live video classes for later playback.
Breakout Rooms Module: Creates smaller discussion groups within a main session.
Payment Gateway Module: Integrates payment processing for premium class offerings.

Use Cases

Live Classrooms: Host interactive sessions with multiple participants, enabling real-time engagement and Q&A.
Virtual Classrooms: Conduct online learning sessions where students can interact visually and auditorily.
Office Hours: Provide one-on-one or small group consultations for students needing additional support.
Webinars: Deliver professional development sessions or workshops to a large audience.

Integration Tips

Preload Required Libraries: Ensure the video call library is preloaded to avoid delays during session initiation.
Error Handling: Implement error handling for common issues like microphone access, browser compatibility, and network problems.
User Interface: Design a clean and intuitive interface that integrates the video call module seamlessly without overwhelming users.

Configuration Options

Parameter	Description
`enableVideo`	Enables or disables video functionality.
`autoStartVideo`	Automatically starts video capture when joining a call.
`maxParticipants`	Sets the maximum number of participants allowed in a session.
`audioOnlyMode`	Restricts the session to audio-only mode.
`requireUserMedia`	Forces users to share their video/audio upon joining.
`deviceSelectionPrompt`	Shows a prompt for users to select their camera and microphone.

Limitations

Browser Compatibility: Currently supported in Chrome, Firefox, and Edge; other browsers may lack full functionality.
Recording Functionality: No built-in recording feature; requires additional modules for recording capabilities.
Participant Limitation: Maximum of 50 participants per session; larger groups require alternative solutions.
Screen Sharing: Screen sharing is not supported without the dedicated Screen Sharing Module.

By leveraging this module, developers can efficiently integrate live video calling into their web applications, enhancing user interaction and engagement in online classrooms.

In-Browser Video Call Module

Key Features of In-Browser Video Call Module

1. HD Video and Audio Streaming

2. Participant Management

3. Classroom-Specific Features

4. Screen Sharing and Content Collaboration

5. Integration with Learning Management Systems (LMS)

6. Reliable and Scalable Infrastructure

7. Recording and Playback

8. Customizable Branding

9. Security and Compliance

10. APIs for Integration

11. Browser and Device Compatibility

In-Browser Video Call Module Documentation

Overview

Server API (FastAPI)

Client UI (React)

Data Models (Pydantic)

Explanation

Server API (FastAPI)

Client UI (React)

Data Models

In-Browser Video Call Module Technical Documentation

Overview

Related Modules

Use Cases

Integration Tips

Configuration Options

Limitations