Convert SUB_SUBVIEWER Subtitles to SUB_MICRODVD 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 SUB_MICRODVD

MicroDVD is a frame-based subtitle format, which means its timings are based on video frame numbers rather than timestamps. For example, a line might be defined to appear from frame 1000 to frame 1050. This can be very precise, but it also means the subtitle file is tied to a specific video file with a specific frame rate. If the frame rate changes, the subtitle timing will be incorrect.

SUB_SUBVIEWER vs SUB_MICRODVD

FeatureSUB_SUBVIEWERSUB_MICRODVD
Styling Supportfalsefalse
Positioning Supportfalsefalse
Animation Supportfalsefalse
Learning Curvebeginnerintermediate
Quality Rating32
Patent Statusfreewarefreeware
Year Introduced19991999

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.

Why use frame numbers instead of time?

Frame-based timing can be very useful for video editors who work on a frame-by-frame basis. However, for general distribution and playback, time-based formats like SRT are much more flexible and reliable, as they are not dependent on the video's frame rate.

What happens if I use a MicroDVD file with the wrong frame rate video?

The subtitles will go out of sync. For example, if the subtitle file was created for a 25 fps video, but you play it with a 29.97 fps video, the subtitles will appear progressively earlier or later as the video plays.

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