Convert SUB_SUBVIEWER Subtitles to SUP 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 SUP

The SUP format is a generic container for image-based subtitles, most commonly associated with DVD and Blu-ray discs. On DVDs, these are called VobSub (.sub/.idx), and on Blu-rays, they are PGS (.sup). In both cases, the subtitles are stored as a stream of images, not as text. This ensures consistent visual appearance across all players but makes them large and impossible to edit as text.

SUB_SUBVIEWER vs SUP

FeatureSUB_SUBVIEWERSUP
Styling Supportfalsetrue
Positioning Supportfalsetrue
Animation Supportfalsefalse
Learning Curvebeginnerexpert
Quality Rating35
Patent Statusfreewareindustry standard
Year Introduced19991997

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.

What's the difference between PGS and SUP?

PGS is a specific type of SUP stream used for Blu-ray discs. 'SUP' is often used more generically to refer to any image-based subtitle stream, including those from DVDs (which are technically VobSubs). Our converter correctly identifies and handles these different image-based formats.

How do I convert a SUP file to SRT?

Converting an image-based format like SUP to a text-based format like SRT requires Optical Character Recognition (OCR). This process involves software scanning the images of the subtitles and attempting to recognize the characters to convert them back into text. The accuracy can vary depending on the quality and font of the subtitles.

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