html语言切换插件,在video.js中使用video js语言切换插件的问题

但是,我甚至不能用repo蠕虫做最简单的例子,

在浏览器中,我得到这个错误:

TypeError: videojs.MenuItem is undefined

Error: plugin "languageSwitch" does not exist

这是我的代码:

HTML:

To view this video please enable JavaScript, and consider upgrading to a web browser that

supports HTML5 video

javascript:

var player = videojs('my-video');

player.languageSwitch({

languages: [

{

name: 'English',

sources: [

{

src: 'https://cdn-film-http.twig-world.com/TWG00604/2012-02-22/h264-800/b5498f3a034547c3b2a1d4e5c825c6f1.mp4',

type: 'video/mp4',

res: 'Medium'

},

{

src: 'https://cdn-film-http.twig-world.com/TWG00604/2012-02-22/WebM-800/227a2a4cceb23b1605111bc7797b9bd6.webm',

type: 'video/webm',

res: 'Medium'

}

]

},

{

name: 'Portuguese',

sources: [

{

src: 'https://cdn-film-http.twig-world.com/BRPTTWG00604/2013-12-19/h264-800/87558365664a78b2abdc2d915024dc9d.mp4',

type: 'video/mp4',

res: 'Medium'

},

{

src: 'https://cdn-film-http.twig-world.com/BRPTTWG00604/2013-12-19/WebM-800/79ba5f114f2cb800abe153deb8fee242.webm',

type: 'video/webm',

res: 'Medium'

}

]

}

]

});

使用以下内容交付网络:

https://vjs.zencdn.net/7.4.1/video-js.css

https://raw.githubusercontent.com/adamoliver/VJS-language-switch/master/videojs.language-switch.css

https://cdnjs.cloudflare.com/ajax/libs/video.js/7.4.2/video.min.js

https://raw.githubusercontent.com/adamoliver/VJS-language-switch/master/videojs.language-switch.js