Unverified50% confidenceFactExact time
VTT（WebVTT）是 W3C 为 HTML5 视频制定的标准，在 SRT 基础上增加了 CSS 样式标签、定位信息和章节标记能力
1
Sources
50%
Confidence
Long-term
Relevance
8/24/2026
First Seen
Sources
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