如何识别当用户的偏好没有表明另一条音轨更合适时音轨要在 HTML 中启用?
如果您为视频提供两个字幕音轨,则使用 default 属性可以识别要启用的音轨。
实例
您可以尝试以下代码来为音轨实现默认属性 −
<!DOCTYPE HTML> <html> <body> <video width = "300" height = "200" controls autoplay> <source src = "/html5/foo.ogg" type = "video/ogg" /> <source src = "/html5/foo.mp4" type = "video/mp4" /> <track src = "subtitles_en.vtt" kind = "subtitles" srclang = "en" label = "English"> <track src = "subtitles_ru.vtt" kind = "subtitles" srclang = "ru" label = "Russia" default> Your browser does not support the video element. </video> </body> </html>
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