html5添加视频

视频Only MP4, WebM, and Ogg video are supported by the HTML standard.
音频 Only MP3, WAV, and Ogg audio are supported by the HTML standard.

		<video src="video/puppy.mp4" 
			poster="images/puppy.jpg" 
			width="400" height="300" 
			preload
			controls
			loop>
			<p>A video of a puppy playing in the snow</p>
		</video>
	</body>

src来源
poster加载或播放前显示的图像
width,height宽，高
controls浏览器提供额外控件
autoplay自动播放
loop循环播放
preload:none不点击播放前不加载视频
auto加载
metadata收集少量信息。
muted 静音

	<video poster="images/puppy.jpg" width="400" height="320" preload controls loop>
			<source src="video/puppy.mp4" type='video/mp4;codecs="avc1.42E01E, mp4a.40.2"' />
			<source src="video/puppy.webm" type='video/webm;codecs="vp8, vorbis"' />
			<p>A video of a puppy playing in the snow</p>
		</video>

type说明视频格式
codecs编码类型
2.audio加载音频

<audio src="audio/test-audio.ogg" controls autoplay>
			<p>This browser does not support our audio format.</p>
		</audio>

3.多个音频源

<audio controls autoplay>
			<source src="audio/test-audio.ogg" />
			<source src="audio/test-audio.mp3" />
			<p>This browser does not support our audio format.</p>
		</audio>