Beginning HTML5 Media: Make the most of the new video and by Silvia Pfeiffer

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By Silvia Pfeiffer

Beginning HTML5 Media, moment Edition is a finished creation to HTML5 video and audio. The HTML5 video typical allows browsers to aid audio and video parts natively. This makes it really easy for net builders to submit audio and video, integrating either in the common presentation of web content. for instance, media parts should be styled utilizing CSS (style sheets), considered on a cellular machine, and manipulated in a Canvas or an audio filter out graph. The e-book bargains strategies for offering accessibility to media components, allowing constant dealing with of different representations of media assets. The replace comprises all the adjustments and revisions because the first HTML5 draft.

Beginning HTML5 Media dives deep into the markup that's brought for media point aid in browsers. You’ll discover the default person interface provided via browsers for media parts, in addition to the JavaScript API supplied to regulate their habit. You’ll additionally account for H.264, WebM and Ogg Theora formats in addition to discover the rising net Audio API general, which supplies an in depth set of hardware-accelerated audio filters to accomplish a degree of audio sign manipulation within the browser formerly in simple terms on hand to audio professionals.

What you’ll learn

  • How to create cross-browser markup in HTML to incorporate audio and video into your net pages
  • How to interchange the default controls of net browsers together with your personal or "skin" your media player
  • How to take advantage of the JavaScript API for media elements
  • How to combine media components with different HTML5 constructs comparable to CSS, Canvas, or net employee Threads
  • How to make audio and video accessible
  • How to take advantage of media fragment URIs to handle definite temporal subparts or tracks of a media resource
  • How to paintings with the internet Audio API

Who this publication is for

This publication is should you are knowledgeable in authoring and publishing websites, yet have by no means applied audio and video. it's going to additionally aid these educated within the use of Adobe Flash, Microsoft Silverlight, or QuickTime to appreciate what's taking place in HTML5 media and the way to exploit the recent media parts.

Table of Contents

1. Encoding Media

2. utilizing and Manipulating Media Elements

3. The JavaScript API

4. Accessibility and Internationalization of HTML5 Media

5. Manipulating Media through Canvas

6. Manipulating Audio in the course of the WebAudio API

Show description

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Extra info for Beginning HTML5 Media: Make the most of the new video and audio standards for the Web

Example text

38 Chapter 2 ■ Using and Manipulating HTML5 Video and Audio Elements @loop To make the audio automatically restart after finishing playback, you use the @loop attribute shown in Listing 2-17. Listing 2-17. ogg" autoplay loop> The @loop attribute, in conjunction with the @autoplay attribute, provides a means to set continuously playing “background” music or sound on your web page. This is not recommended; it is just mentioned here for completeness. If you accidentally or deliberately create several such elements, they will all play at the same time and over the top of each other, but not synchronously.

We want to replicate this for video but cannot use CSS to put the video in the background. Thus, we have to render a gradient

on top of the video. The CSS3 spec specifies two functions to create gradients: linear-gradient() and radial-gradient().

This means that Safari uses a width of 200 px; the others all use a width of 300 px. The height ranges from 25 px (Safari, Opera) to 28 px (Firefox) to 30 px (Google Chrome) to 52 px (IE). Figure 2-8. The audio controls for a number of browsers In Chapter 3 we show how you can run your own controls and thus make them consistent across browsers. 39 Chapter 2 ■ Using and Manipulating HTML5 Video and Audio Elements @preload The @preload attribute for

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