Whidy Blog

最近研究html5的video标签,尝试自己做一个播放器.然后既然是自己做必然要将video的controls给关掉.

然后想到了如果要控制字幕这可怎么办呢,找了好久才找到如何通过js来控制字幕的显示与隐藏开关.其实也很简单.

这个测试仅针对视频有一个track标签.

HTML:

<video class="video" id="video" width="640" height="480" preload="auto" poster="https://github.com/whidy/video-player/blob/master/src/poster.png?raw=true">
  <source src="http://ie.microsoft.com/testdrive/ieblog/2011/nov/pp4_blog_demo.mp4" type="video/mp4">
  <p>Your browser doesn't support HTML5 video. YOU ARE BAD!</p>
  <track kind="subtitles" src="./subtitles.vtt" srclang="en" default>
</video>
<a href="javascript:;" id="btnCapSwitcher">Subtitle On/Off</a>

JAVASCRIPT:

var video = document.getElementById('video'),
  btnCapSwitcher = document.getElementById('btnCapSwitcher');
// 字幕开关(注意在本次demo测试中只有一个字幕因此可以这样处理,如果存在多个字幕需可能需要修改)
btnCapSwitcher.addEventListener('click', function () {
  if (video.textTracks[0].mode == 'hidden') {
    video.textTracks[0].mode = 'showing';
  } else {
    video.textTracks[0].mode = 'hidden';
  }
}, 'false');

参考 Toggling Closed Caption in HTML5 video and disabling default video controls

如果有多个字幕参考 Subtitle implementation