Convert SSA Subtitles to SCC Format

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About SSA

SubStation Alpha (SSA) is the predecessor to the more feature-rich ASS format. It was one of the first subtitle formats to allow for basic styling, including control over fonts, colors, and text position. While it has largely been superseded by ASS, it laid the groundwork for advanced subtitle scripting and is still supported by many players that support ASS.

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.

SSA vs SCC

FeatureSSASCC
Styling Supporttruetrue
Positioning Supporttruetrue
Animation Supportfalsefalse
Learning Curveintermediateexpert
Quality Rating35
Patent Statusopen formatproprietary
Year Introduced19981998

Frequently Asked Questions

Should I use SSA or ASS?

You should almost always choose ASS over SSA for new projects. ASS is fully backward-compatible with SSA and contains a much larger and more powerful feature set. SSA is primarily of interest for compatibility with very old files or legacy workflows.

What can SSA do that SRT cannot?

Unlike SRT, SSA allows you to define specific styles for your subtitles, such as the font family, font size, primary and secondary colors, and basic positioning on the screen. However, its capabilities are much more limited compared to its successor, ASS.

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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