Convert SUB_SUBVIEWER Subtitles to VTT Format

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About SUB_SUBVIEWER

SubViewer (.sub) is one of the earliest popular subtitle formats. It is a simple, time-based text format. There have been two major versions, SubViewer 1.0 and 2.0. Version 2.0, which is more common, uses a '[region]' section to define metadata and then lists subtitles with timestamps. Its simplicity led to wide support, but it lacks any styling features.

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.

SUB_SUBVIEWER vs VTT

FeatureSUB_SUBVIEWERVTT
Styling Supportfalsetrue
Positioning Supportfalsetrue
Animation Supportfalsefalse
Learning Curvebeginnerintermediate
Quality Rating35
Patent Statusfreewareopen standard
Year Introduced19992012

Frequently Asked Questions

My .sub file doesn't work. Why?

The '.sub' file extension is very generic and is used by several completely different and incompatible subtitle formats, including the text-based SubViewer and the image-based VobSub (for DVDs). If your file isn't working, it's likely because your player is expecting a different '.sub' format. Our converter can intelligently distinguish between them.

Is SubViewer still a good format to use?

For new projects, SRT is a much better choice. It's just as simple but has even wider and more reliable support across all modern platforms and players. SubViewer is mostly relevant for compatibility with older files.

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.

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