Convert VTT Subtitles to SCC Format
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About VTT
WebVTT (Web Video Text Tracks) is the modern standard for displaying subtitles on the web, designed specifically for use with HTML5 video. It's similar to SRT but includes added features for styling (using CSS), positioning, and metadata. This allows for more dynamic, accessible, and richly formatted captions and subtitles directly in the browser.
About SCC
SCC (Scenarist Closed Caption) is a professional format used for creating Line 21 closed captions, which are the standard for broadcast television in North America. SCC files contain not just the text but also precise data on screen positioning (including roll-up and pop-on styles) and color, conforming to the CEA-608 standard. It's a critical format for broadcast accessibility compliance.
VTT vs SCC
| Feature | VTT | SCC |
|---|---|---|
| Styling Support | true | true |
| Positioning Support | true | true |
| Animation Support | false | false |
| Learning Curve | intermediate | expert |
| Quality Rating | 5 | 5 |
| Patent Status | open standard | proprietary |
| Year Introduced | 2012 | 1998 |
Frequently Asked Questions
How is VTT different from SRT?
The main differences are that VTT supports styling, positioning, and metadata, while SRT does not. VTT also has a slightly different timestamp format (using a period instead of a comma for milliseconds) and requires a 'WEBVTT' header. VTT is the standard for modern web video.
Can I use HTML tags in a VTT file?
You can use certain HTML-like tags within VTT cues for basic formatting, such as <b> for bold, <i> for italic, and <u> for underline. You can also define more complex styles in an external CSS file linked to the video player.
What is the difference between open captions and closed captions?
Open captions are 'burned' into the video itself and cannot be turned off. Closed captions (like those from an SCC file) are a separate stream of data that the viewer can choose to enable or disable from their television or player.
Can I use SCC files for web video?
While it's possible to convert SCC to a web-friendly format like VTT, SCC itself is not designed for the web. It is a broadcast-specific format. Web platforms have their own standards for accessibility and captions, with VTT being the most common.
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