如果您為影片提供兩個字幕軌道，請使用預設屬性來識別要啟用的軌道。
您可以嘗試以下程式碼來實現軌道的預設屬性 -
<!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>以上是如果使用者的偏好設定沒有指示其他曲目更合適，如何識別應啟用該曲目在HTML中？的詳細內容。更多資訊請關注PHP中文網其他相關文章！
