How to implement video call and overlay screen in an Ionic application?

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To implement video call and overlay screen in an Ionic application, you can follow these steps:

1. Choose a video call API or library - There are several video call APIs or libraries available in the market such as Agora.io, Twilio, and WebRTC. You can choose one that best suits your needs.

2. Install the API or library in your Ionic project - Install the chosen API or library using npm or any other package manager.

3. Set up the video call - Set up the video call by initializing the API or library and creating a connection between the two clients.

4. Implement the overlay screen - To implement the overlay screen, you can use Ionic's modal component or create a custom component. The overlay screen should contain the video call interface and any other relevant information.

5. Add event listeners - Add event listeners to handle the video call events such as call started, call ended, and call disconnected.

6. Test the video call - Test the video call by initiating a call and making sure that the video call interface and overlay screen are working as expected.

7. Deploy the application - Once you have tested the video call and overlay screen, deploy the application to make it available to users.

By following these steps, you can implement video call and overlay screen in your Ionic application.