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Understanding Web Video and Audio

Explore the various applications of web video and audio, including codecs, Flash, plugins, and the emergence of HTML5 as a replacement for Flash. Discover the browser support for HTML5 video and audio elements and learn how to embed and control video and audio files in your web pages.

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Understanding Web Video and Audio

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  1. Understanding Web Video and Audio

  2. Many Applications • Plug-ins • Coder Decoders (codecs) • Flash • Installed on 90% of desktops • Universal distribution • Takes care of codecs and formats

  3. Smart Phones and Tablets • Flash has fallen • Too difficult to support on these devices • New codecs competing to be the best • HTML5 and CSS3 built in support • Replaces much of Flash animation capabilities • Video still unclear

  4. Adobe Edge Animate • Does not replace Adobe Flash • Uses HTML5, CSS3 and JavaScript • Only available on Creative Cloud • In Dreamweaver • File > Publish • Exports Adobe Edge Animate composition • Bug using FLV and SWF with HTML5 • Bug promised to be fixed

  5. HTML5 Video • Playing Videos in HTML • Before HTML5, a video could only be played in a browser with a plug-in (like flash). • The HTML5 <video> element specifies a standard way to embed a video in a web page.

  6. HTML5 Video • Browser Support • The numbers in the table specify the first browser version that fully supports the <video> element.

  7. HTML5 Video • The HTML <video> Element • To show a video in HTML, use the <video> element: • Example • <video width="320" height="240" controls>  <source src="movie.mp4" type="video/mp4">  <source src="movie.ogg" type="video/ogg">Your browser does not support the video tag.</video>

  8. HTML5 Video • How it Works • The controls attribute adds video controls, like play, pause, and volume. • It is a good idea to always include width and height attributes. If height and width are not set, the page might flicker while the video loads. • The <source> element allows you to specify alternative video files which the browser may choose from. The browser will use the first recognized format. • The text between the <video> and </video> tags will only be displayed in browsers that do not support the <video> element.

  9. HTML5 Video • HTML <video> Autoplay • To start a video automatically use the autoplay attribute: • <video width="320" height="240" autoplay>  <source src="movie.mp4" type="video/mp4">  <source src="movie.ogg" type="video/ogg">Your browser does not support the video tag.</video> • The autoplay attribute does not work in mobile devices like iPad and iPhone.

  10. HTML5 Video • HTML Video - Browser Support • In HTML5, there are 3 supported video formats: MP4, WebM, and Ogg. • The browser support for the different formats is:

  11. HTML5 Video • HTML Video - Media Types

  12. HTML5 Audio • Audio on the Web • Before HTML5, audio files could only be played in a browser with a plug-in (like flash). • The HTML5 <audio> element specifies a standard way to embed audio in a web page.Browser Support • The numbers in the table specify the first browser version that fully supports the <audio> element.

  13. HTML5 Audio • The HTML <audio> Element • To play an audio file in HTML, use the <audio> element • Example • <audio controls>  <source src="horse.ogg" type="audio/ogg">  <source src="horse.mp3" type="audio/mpeg">Your browser does not support the audio element.</audio> • :

  14. HTML5 Audio • HTML Audio - How It Works • The controls attribute adds audio controls, like play, pause, and volume. • The <source> element allows you to specify alternative audio files which the browser may choose from. The browser will use the first recognized format. • The text between the <audio> and </audio> tags will only be displayed in browsers that do not support the <audio> element.

  15. HTML5 Audio • HTML Audio - Browser Support • In HTML5, there are 3 supported audio formats: MP3, Wav, and Ogg. • The browser support for the different formats is: 

  16. HTML5 Audio • HTML Audio - Media Types

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