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  • Book Overview & Buying WebRTC Cookbook
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WebRTC Cookbook

WebRTC Cookbook

By : Andrii Sergiienko
5 (1)
Buy this Book
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WebRTC Cookbook

WebRTC Cookbook

5 (1)
By: Andrii Sergiienko
Buy this Book

Overview of this book

If you are a JavaScript developer with a basic knowledge of WebRTC and software development, but want to explore how to use it in more depth, this book is for you.
Table of Contents (10 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Peer Connections
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1. Peer Connections
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Introduction
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Building a signaling server in Erlang
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Building a signaling server in Java
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Detecting WebRTC functions supported by a browser
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Making and answering calls
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Implementing a chat using data channels
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Implementing a chat using a signaling server
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Configuring and using STUN
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Configuring and using TURN
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2. Supporting Security
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2. Supporting Security
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Introduction
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Generating a self-signed certificate
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Configuring a TURN server with authentication
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Configuring a web server to work over HTTPS
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Configuring a WebSockets proxy on the web server
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Configuring a firewall
3
3. Integrating WebRTC
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3. Integrating WebRTC
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Introduction
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Integrating WebRTC with Asterisk
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Integrating WebRTC with FreeSWITCH
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Making calls from a web page
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Integration of WebRTC with web cameras
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4. Debugging a WebRTC Application
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4. Debugging a WebRTC Application
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Introduction
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Working with a WebRTC statistics API
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Debugging with Chrome
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Debugging TURN
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Debugging using Wireshark
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5. Working with Filters
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5. Working with Filters
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Introduction
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Working with colors and grayscale
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Working with brightness
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Working with contrast
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Working with saturation
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Working with hue
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Using the sepia filter
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Using the opacity filter
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Inverting colors
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Implementing the blur effect
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Implementing the dropped shadow effect
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Combining filters
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Custom video processing
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6. Native Applications
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6. Native Applications
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Introduction
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Building a customized WebRTC demo for iOS
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Compiling and running an original demo for iOS
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Compiling and running a demo for Android
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Building an OpenWebRTC library
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7. Third-party Libraries
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7. Third-party Libraries
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Introduction
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Building a video conference using SimpleWebRTC
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Creating an application using RTCMultiConnection
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Developing a simple WebRTC chat using PeerJS
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Making a simple video chat with rtc.io
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Using OpenTok to create a WebRTC application
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Creating a multiuser conference using WebRTCO
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8. Advanced Functions
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8. Advanced Functions
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Introduction
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Visualizing a microphone's sound level
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Muting a microphone
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Pausing a video
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Taking a screenshot
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Streaming media
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Index
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Index

Using the opacity filter

In this recipe, we will cover how to use the opacity filter. You will probably rarely use it, but it can be used for implementing interesting features, such as picture in picture.

How to do it…

Follow these steps:

  1. Add a control element to the main web page of your application—using this object we will control the video's opacity:

    Opacity
<input type="range" oninput="changeOpacity(this.valueAsNumber);" value="1" step="0.1" min="0" max="1">

  2. Add an appropriate JavaScript function:

    function changeOpacity(val) {
  var v = document.getElementById("localVideo");
  v.style.webkitFilter="opacity(" + val + ")";
};

    Here localVideo is the ID property of the HTML video tag for the local video playback.

  3. Navigate your web browser to the web page. You will first see an unprocessed video from the web camera, with no filter applied. The following screenshot depicts this stage:

  4. On the left-hand side of the page, you can see a control described as Opacity. Try to move it to the left and...

CONTINUE READING
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WebRTC Cookbook
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