Convert TXT_QUICKTIME Subtitles to SUB_MICRODVD Format

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About TXT_QUICKTIME

QuickTime Text, often called QTText, is Apple's native format for creating text tracks in QuickTime videos. It's a simple text file that can include timestamps and some basic styling descriptors using text-based tags. It was commonly used for adding subtitles, chapter markers, and other timed text to videos within the Apple ecosystem.

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.

TXT_QUICKTIME vs SUB_MICRODVD

FeatureTXT_QUICKTIMESUB_MICRODVD
Styling Supportfalsefalse
Positioning Supportfalsefalse
Animation Supportfalsefalse
Learning Curvebeginnerintermediate
Quality Rating22
Patent Statusproprietaryfreeware
Year Introduced19991999

Frequently Asked Questions

Does QuickTime Text work outside of Apple products?

Support for QTText is very limited outside of the Apple ecosystem. Players like VLC may have some support for it, but in general, it is not a portable format. For cross-platform compatibility, it's much better to use a universal format like SRT.

Can I style QuickTime Text subtitles?

Yes, QTText supports some basic text styling. You can add descriptors in the file header to define a font, size, and color, and use tags within the subtitle text to apply styles like bold or italic. However, the styling is much more limited than formats like VTT or ASS.

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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