![]() Instead of using the single src attribute, you nest separate elements for each encoding with appropriate type attributes inside the or element and let the browser download the format that it can display. Then, you tie these separate versions of the file to the media element. To do this, you need to encode your multimedia twice: once as Theora and once as H.264 in the case of video, and in both Vorbis and MP3 for audio. Let's not repeat the mistakes of the old "Best viewed in Netscape Navigator" badges on websites. The rule is: provide both royalty-free (webM or Theora) and H.264 video in your pages, and both Vorbis and MP3 audio so that nobody gets locked out of your content. webm for high quality video, once browser support is there. VP8 will be included in Adobe's Flash Player and every YouTube video will be in webM format. IE9 will, if the codec is separately installed. Opera, Firefox and Chrome have announced it will support it. This is a very high-quality codec, and when combined with Vorbis in a container format based on the Matroska format, it's collectively known as "webM". Confused?Īs we were finishing this book, Google announced it is opensourcing a video codec called VP8. Google Chrome supports Theora and H.264 video, and Vorbis and MP3 audio. Microsoft has announced that IE9 will also support H.264, which is also supported on iPhone and Android. Safari doesn't, preferring instead to provide native support for the H.264 video codec and MP3 audio. Opera and Firefox support Theora and Vorbis. This leaves us with a fragmented situation. However, these codecs were dropped from the HTML5 spec after Apple and Nokia objected, so the spec makes no recommendations about codecs at all. Vorbis is a codec used by services like Spotify, among others, and for audio samples in games like Microsoft Halo, it's often used with Theora for video and combined together in the Ogg container format. Learn More Buy Codecs-the horror, the horrorĮarly drafts of the HTML5 specification mandated that all browsers should at least have built-in support for multimedia in two codecs: Ogg Vorbis for audio and Ogg Theora for movies.
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