Talk to us
Talk to us

A Detailed Guide to Flutter-WebRTC

A Detailed Guide to Flutter-WebRTC

Flutter-WebRTC stands at the forefront of enabling real-time communication in mobile and web applications. This detailed guide dives into the essentials of integrating WebRTC with Flutter, providing developers with the knowledge to enhance app interactivity and connectivity. From setting up your environment to advanced features, we’ll cover everything you need to know to harness the power of Flutter-WebRTC in your projects.

What is Flutter?

Flutter is an open-source UI software development kit created by Google. It’s used for building natively compiled applications for mobile, web, and desktop from a single codebase. Flutter allows developers to create beautiful, fast, and portable applications for any platform. It uses the Dart programming language and provides a rich set of pre-designed widgets, which helps in creating custom and complex UIs with ease.

Flutter operates on a reactive framework, which means that any changes in the app state are immediately reflected in the UI. This leads to a smooth and responsive user experience. It also supports hot reloading, allowing developers to see the results of their changes in real-time without restarting the app. Flutter’s layered architecture ensures that it is flexible enough to provide full control over the screen and allows for the creation of highly customized solutions without compromising on performance.

What is WebRTC?

WebRTC (Web Real-Time Communications) is a real-time communication technology that allows network applications or sites to establish a peer-to-peer (Peer-to-Peer) connection between browsers without intermediaries to achieve video streaming and/or the transmission of audio streams or other arbitrary data.

WebRTC is not just for building desktop apps; it can be used to create iOS and Android apps too. The main difference between WebRTC for desktop and mobile apps is that you need to use a third-party library for the browser on mobile devices to access the camera and microphone.

What is Flutter WebRTC?

Flutter WebRTC is a plugin that enables real-time communication capabilities in Flutter applications. It leverages the Web Real-Time Communication (WebRTC) technology to allow audio and video communication to occur directly between browsers and devices without the need for an intermediary server, except for the initial signaling and connection establishment.

By integrating the Flutter WebRTC plugin, developers can build cross-platform Flutter applications that support live video calls and audio calls, peer-to-peer connections, and data channels. This is particularly useful for creating apps that require real-time interaction, such as video conferencing tools, live broadcasting apps, collaborative platforms, and more.

zegocloud sdk

Advanced Features Of Flutter WebRTC

Focusing on a selection of advanced features from Flutter-WebRTC, let’s delve into the details of five key capabilities that significantly enhance the functionality and user experience of real-time communication applications built with Flutter.

1. Data Channel Support

Flutter-WebRTC’s data channel support is crucial for creating interactive and collaborative applications. This feature enables peer-to-peer exchange of text and binary data, allowing developers to implement functionalities like chat systems, real-time game mechanics, or file transfers. It opens up a plethora of possibilities for real-time interaction beyond audio and video communication, making apps more engaging and versatile.

2. Screen Sharing

Screen sharing is an invaluable feature for educational, business, and collaborative applications, enabling users to share their entire screen or specific applications/windows with others. This functionality is essential for presentations, remote learning, and providing technical support, enhancing the utility of communication platforms by allowing for more detailed and interactive discussions.

3. Multi-party Conferencing

The ability of Flutter-WebRTC to support multi-party conferencing transforms business and educational interactions. ZEGOCLOUD simplifies this by providing a robust platform for seamless integration, ensuring high-quality, scalable conferencing solutions directly within Flutter apps.

4. Network Adaptability

Network adaptability ensures that communication remains smooth and consistent even in varying network conditions. Flutter-WebRTC automatically adjusts the video quality based on the user’s bandwidth availability, minimizing interruptions and buffering issues. This adaptive streaming capability is crucial for maintaining a high-quality user experience, especially in regions with unstable internet connections.

5. Encryption and Security

Security is paramount in any application, and Flutter-WebRTC provides end-to-end encryption for all communications, ensuring that audio and video streams are protected from eavesdropping and interception. Utilizing standards like DTLS (Datagram Transport Layer Security) and SRTP (Secure Real-time Transport Protocol), Flutter-WebRTC guarantees that user data remains confidential and secure, fostering trust and compliance with privacy regulations.

How Does Flutter WebRTC Work?

Flutter WebRTC works by utilizing the WebRTC standards to facilitate real-time communication (RTC) within Flutter applications. It bridges the WebRTC API with Flutter’s UI components, enabling developers to implement video and audio communication features seamlessly across Android, iOS, and web platforms from a single codebase. This integration allows for the transmission of streaming data between peers, ensuring low latency and high-quality communication.

By leveraging Flutter’s development framework along with the real-time capabilities of WebRTC, developers can create interactive and engaging applications that include voice, video calls, and data exchange functionalities, all with the convenience and efficiency of Flutter’s cross-platform development environment.

Seamlessly Integrate WebRTC into Your Flutter App with ZEGOCLOUD

Creating a flutter WebRTC video call application from scratch can be challenging, time-consuming, and require much technical knowledge. Fortunately, ZEGOCLOUD provides prebuilt UI components that allow developers to build robust and scalable applications quickly and easily.

ZEGOCLOUD UIKits is designed to help developers build video conferencing applications using Flutter WebRTC. This UIKit is a set of customizable components that enable developers to create high-quality video conferencing apps without worrying about technical details. It has many features that make it a reliable and efficient toolkit for building Flutter Webrtc video call applications.

Some of these features include:

1. One-to-One Video Calls

Enables private video chats with high-quality, low-latency video and audio. Features like noise suppression and echo cancellation ensure clear audio, even in noisy environments.

2. Group Video Calls

Supports video calls with up to 100 participants, perfect for large meetings or webinars. Includes speaker identification and active speaker tracking to enhance focus during conversations.

3. Customizable UI Components

Offers developers the flexibility to customize the video call interface, including buttons and chat, to create a tailored user experience.

4. Scalable Infrastructure

Built for scalability, it allows for global access with minimal latency and high reliability. Advanced security, including end-to-end encryption, protects user data.

Steps to Build WebRTC Apps with Flutter

Follow the steps below to create your WebRTC video conference app using ZEGOCLOUD’seo Conference Kit:

1. Add ZegoUIKitPrebuiltVideoConference as dependencies

Execute this code in your project’s directory to add the dependency.

flutter pub add zego_uikit_prebuilt_video_conference

2. Import the SDK

Import the prebuilt Video Conference Kit SDK into your Dart code.

import 'package:zego_uikit_prebuilt_video_conference/zego_uikit_prebuilt_video_conference';

3. Utilize ZegoUIKitPrebuiltVideoConference in your project.

Retrieve your project appSign from the ZEGOCLOUD Admin Console. Specify userID and userName for Video Conference Kit connection. Generate or create a conferenceID for the desired video conference.

class VideoConferencePage extends StatelessWidget {
  final String conferenceID;

  const VideoConferencePage({
    Key? key,
    required this.conferenceID,
  }) : super(key: key);

  Widget build(BuildContext context) {
    return SafeArea(

      child: ZegoUIKitPrebuiltVideoConference(
        appID: YourAppID, // Fill in the appID that you get from ZEGOCLOUD Admin Console.
        appSign: YourAppSign, // Fill in the appSign that you get from ZEGOCLOUD Admin Console.
        userID: 'user_id',
        userName: 'user_name',
        conferenceID: conferenceID,
        config: ZegoUIKitPrebuiltVideoConferenceConfig(),


Initiate a video conference by accessing. VideoConferencePage.

4. Configure your project

For seamless integration with your app, configuration of your setup is required. Follow the steps below to do so:


  1. For Flutter 2. x.x projects, adjust the compileSdkVersion to 33 in your_project/android/app/build.gradle file.
  2. Include app permissions by opening your_project/app/src/main/AndroidManifest.xml file and adding the following code:
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
  1. Prevent code obfuscation.

To avoid obfuscation of SDK public class names, perform the following steps:

a. Create a file <strong>in</strong> your_project > android > app folder with the following content:

-keep class .zego. { *; }

b. Add the following configuration code to the release section of your_project/android/app/build.gradle file:

proguardFiles getDefaultProguardFile('proguard-android.txt'), ''


To grant permissions, access your_project/ios/Runner/Info.plist and add the following code to the dict section:

<string>Access permission to camera is required.</string>
<string>Access permission to microphone is required.</string>


Building a Flutter WebRTC app can be made easier using ZEGOCLOUD’s SDK, particularly the Video Conference Kit. By following this step-by-step Flutter WebRTC tutorial and utilizing this kit, developers can easily create robust and scalable video conferencing applications. Sign up now for ZEGOCLOUD and get 10,000 free minutes to start.

Read more:

Flutter WebRTC FAQ

Q1: How can I achieve low latency in Flutter WebRTC applications?

Achieving low latency in Flutter WebRTC applications involves optimizing network conditions, using efficient codecs, and selecting the closest server for signaling. Additionally, ensuring that your application’s infrastructure is robust and scalable can help reduce latency.

Q2: Can Flutter WebRTC be integrated with other real-time communication platforms like Firebase or Twilio?

Flutter WebRTC can be integrated with other real-time communication platforms, such as Firebase or Twilio. These integrations can enhance your app’s capabilities with additional features like messaging, storage, and more, although direct communication setup for WebRTC will still be necessary.

Q3: Are there any limitations to using Flutter WebRTC on different platforms?

While Flutter WebRTC aims to provide a consistent experience across platforms, there may be some platform-specific limitations or requirements, such as permissions handling, codec support variations, and performance differences due to hardware capabilities. Testing across devices and platforms is crucial to ensure a smooth user experience.

Talk to Expert

Learn more about our solutions and get your question answered.

Talk to us

Take your apps to the next level with our voice, video and chat APIs

Free Trial
  • 10,000 minutes for free
  • 4,000+ corporate clients
  • 3 Billion daily call minutes

Stay updated with us by signing up for our newsletter!

Don't miss out on important news and updates from ZEGOCLOUD!

* You may unsubscribe at any time using the unsubscribe link in the digest email. See our privacy policy for more information.