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WEB中的Audio标签
如何使用Audio
Home Web Front-end HTML Tutorial 使用HTML5的Audio标签打造WEB音频播放器_html/css_WEB-ITnose

使用HTML5的Audio标签打造WEB音频播放器_html/css_WEB-ITnose

Jun 24, 2016 am 11:32 AM

目前,WEB页面上没有标准的方式来播放音频文件,大多数的音频文件是使用插件来播放,而众多浏览器都使用了不同的插件。而HTML5的到来,给我们提供了一个标准的方式来播放WEB中的音频文件,用户不再为浏览器升级诸如Adobe Flash、Apple QuickTime等播放插件,只需使用现代浏览器就可以聆听任何可以发出声音的WEB网站。

WEB中的Audio标签

HTML5定义了一个新的元素用来指定标准的方式来插入音频文件到web页面中:

属性 描述
autoplay true | false 如果是 true,则音频在就绪后马上播放。
controls true | false 如果是 true,则向用户显示控件,比如播放按钮。
end numeric value 定义播放器在音频流中的何处停止播放。默认地,声音会播放到结尾。
loopend numeric value 定义在音频流中循环播放停止的位置,默认是 end 属性的值。
loopstart numeric value 定义在音频流中循环播放的开始位置。默认是 start 属性的值。
playcount numeric value 定义音频片断播放多少次。默认是 1。
src url 所播放音频的 url。
start numeric value 定义播放器在音频流中开始播放的位置。默认地,声音在开头进行播放。

目前支持audio标签的浏览器有:

IE9,Firefox, Opera,Chrome和Safari都支持

注意:IE8和更早的版本,不支持

如何使用Audio

要在HTML5中播放音频,需要在body中插入以下代码:

你可以在标签之间插入文字内容,这样如果浏览器不支持audio,那么会显示这些文字。

也许你会问auto中怎么会包含3个source标签呢?这是为了浏览器和音频格式的兼容性,浏览器制造商并非都同意使用某一种音频文件格式。例如,Chrome、Internet Explorer 9 (IE9) 和 Safari 浏览器不支持 WAV 文件,这是一种使用非压缩格式且正在衰败的标准。我们将每个视频文件名放在单独的 标签里,并且音频容器中的所有源标签都由 构成,如下所示。那么,无论访问者使用什么浏览器,它都将自动选择所读取的第一个文件类型,并为您播放声音。

HTML5浏览器和音频格式兼容性

音频格式 Chrome Firefox IE9 Opera Safari
OGG 支持 支持 支持 不支持 不支持
MP3 支持 不支持 支持 不支持 支持
WAV 不支持 支持 不支持 支持 不支持

此外,不同浏览器音频空间外观也不一样。

HTML5 让开发人员可以更轻松地提供大量WEB体验。

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