Overview:

The Video Call App enables users to initiate and receive one-to-one and group video calls using their smartphones. This application supports real-time audio and video communication, allowing users to stay connected from anywhere over the internet.

Key Features:

• User Authentication
  Sign up and login functionality using email/password (can be enhanced with OTP or social logins).

• 1-on-1 Video Calling
  Users can initiate direct video calls with other registered users in real-time.

• Group Video Call Support
  Add up to X users in a group video call with proper layout management (gallery/speaker view).

• Online Presence Indicator
  Show who is online, busy, or offline before initiating a call.

• Call Notification and Ringing System
  Receive incoming call alerts with accept/reject buttons, vibration, and sound.

• Screen Sharing (Optional)
  Allow users to share their screen for presentations or collaborative work.

• Toggle Camera/Mic
  Users can turn on/off their camera and microphone during the call.

• In-call Chat
  Real-time chat during video calls to share quick messages or links.

• Call Duration Tracker
  Display the call duration and record it in the user’s call history.

• End-to-End Encryption
  Secure video streams with encryption to ensure privacy.

Technology Stack:

• Frontend (Mobile App):
  HTML, CSS, Bootstrap, JavaScript (or React Native for hybrid build)

• Backend:
  Node.js / PHP / Java (based on preference)
  REST APIs for user login, call logs, status management

• Video Communication (RTC):
  WebRTC or third-party SDKs (like Twilio, Agora, or Jitsi)

• Database:
  MySQL / MongoDB
  Stores user details, call logs, and chat messages

• Push Notifications:
  Firebase Cloud Messaging (FCM) for incoming call alerts

Modules:

1. User Module
   Signup, login, profile picture, status updates

2. Contacts Module
   Add/search users, check online status

3. Calling Module
   Initiate, join, end call, video/audio streams

4. Chat Module
   Real-time messaging during calls

5. Call History Module
   List of all previous video calls with timestamps