告诉 HN：YouTube 禁用了高级字幕功能，并正在从旧视频中移除该功能
2 分•作者: mister_mort•6 个月前
YouTube 支持视频的几种基本字幕形式，但最先进的形式来自其 YTT / SRV3 文件格式。
这种格式支持其他任何字幕格式都不可用的选项。这包括粗体/斜体/下划线、文本和背景框的自定义颜色和透明度、轮廓和阴影、备用字体和字号、在视频上的任何位置进行精确的定位、垂直文本以及用于亚洲语言的注音文本。（列表摘自这个有用的用户报告帖子：https://www.reddit.com/r/youtube/comments/1qdvgmc/uploading_srv3_subtitles_got_brokendisabled/）
使用这种格式对于生成与屏幕上的实际文本匹配并原生替换的字幕、生成着色以匹配多个不同说话者的字幕（以便于识别）等等是必要的。
一些使用示例包括（这些视频包含恐怖电影内容警告）：
https://www.youtube.com/watch?v=eHcHjcV8SNY - “Unconscious Requiem”，其中字幕闪烁并改变颜色以匹配屏幕上闪烁和展开的文本
https://www.youtube.com/watch?v=3iUgKH8c7p4 - “Retry Now”，其中字幕的样式与视觉小说文本框中显示的对话相匹配
用户现在报告说，提交带有高级字幕的视频不起作用。
这不仅仅是禁用了新视频——一些用户现在报告说，旧视频的自定义字幕被删除了，包括那些拥有 1000 万以上观看次数的视频。
希望这次更改能够被恢复，但您应该从任何您希望保留的视频中下载字幕。
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Youtube supports several basic forms of subtitling for videos, but the most advanced form comes from their YTT / SRV3 file format.<p>This format supported options not available in any other subtitle format. This includes bold/italic/underline, custom colours and transparency for both the text and the background box, outlines and drop shadows, alternative fonts and font sizes, precise positioning anywhere on the video, vertical text and ruby text for Asian languages. (List taken from this helpful user report post: https://www.reddit.com/r/youtube/comments/1qdvgmc/uploading_srv3_subtitles_got_brokendisabled/ )<p>The use of this format was necessary to generate subtitling that matched actual text on screen and natively replaced it, generate subtitles that were coloured to match multiple different speakers so they were easily identifiable, and more.<p>Some examples of use include (horror movie content warning for these vids):<p>https://www.youtube.com/watch?v=eHcHjcV8SNY - "Unconscious Requiem" in which the subtitles flicker and change colour to match the flickering and unfolding text on screen<p>https://www.youtube.com/watch?v=3iUgKH8c7p4 - "Retry Now" in which the subtitles are styled to match the dialogue as it appears in the visual novel text boxes on screen<p>Users are now report submitting their videos with advanced subtitles does not work.<p>This doesn't just disable it for new videos - some users are now reporting that old videos are having their custom subtitles removed, including ones with 10M+ views.<p>Hopefully this change gets reverted, but you should download subtitles off any video you wish to keep.