如果浏览器同时支持html5视频和flash回退加载

Question

我正在用flash回退（如果它不支持Html5）在我的项目上播放Html5视频。但如果浏览器同时支持这两种播放器，则会加载这两个播放器。帮帮我。

<video controls="controls" preload="auto" poster="image.url" >
    <source src="video.url" type="video/ogg" />
    <source src="video.url" type='video/mp4; codecs="avc1.42E01E, mp4a.40.2"'/>
</video>
<object type="application/x-shockwave-flash" data="flowplayer-3.1.1.swf">
   <param name="movie" value="flowplayer-3.1.1.swf" />
   <param name="allowFullScreen" value="true" />
   <param name="wmode" value="transparent" />
   <param name="flashVars" value="config={'playlist':['image.url',
       {'url':'video.url','autoPlay':false}]}" />
   <img alt="Image" src="" width="191px" height="256px" 
       title="No video playback capabilities, please download the video below" />
</object>

Answer 1

只需将<object>放置在<video>标记内，使其与源标记成为兄弟标记。如果浏览器不支持<video>，它会渲染里面的内容，类似于脚本关闭时的<noscript>

<video controls="controls" preload="auto" poster="image.url" >
    <source src="video.url" type="video/ogg" />
    <source src="video.url" type='video/mp4; codecs="avc1.42E01E, mp4a.40.2"'/>
    <object type="application/x-shockwave-flash" data="flowplayer-3.1.1.swf">
       <param name="movie" value="flowplayer-3.1.1.swf" />
       <param name="allowFullScreen" value="true" />
       <param name="wmode" value="transparent" />
       <param name="flashVars" value="config={'playlist':['image.url',{'url':'video.url','autoPlay':false}]}" />
       <img alt="Image" src="" width="191px" height="256px" title="No video playback capabilities, please download the video below" />
    </object>
</video>