MicroDVD
MicroDVD is a subtitle file format for digital video. Its name is derived from the MicroDVD Player, a media player application designed to play DVD videos along with subtitles, originally developed by Tiamat Software. The application was first released in 2000 but development ended in 2001. Media players that support the format are able to interpret MicroDVD subtitles and mix their contents with their corresponding video files.
Format
Specification
MicroDVD subtitle files have the .sub filename extension. These files may come along with a video file and/or created/modified by the user. Media player applications that support external subtitle files are usually responsible for locating correct .sub files.
MicroDVD subtitle files consist of multiple lines, each defining a portion of the subtitle text that must be displayed between certain given video frames. The line syntax is:
{start-frame}{stop-frame}Text
For example, if "Hello!" is to be displayed during the first 25 frames of a digital video, clip or movie, the corresponding .sub file must contain the line: