Video files (avi mpeg etc) are sometimes accompanied with subtitles, which
are currently very popular as text files. Subtitles provides means for
simple loading, re-timing, and storing these subtitle files.
A command-line tool subs for the same purpose and using Subtitles
interface is included in the distribution.

The module supports srt, sub, smi, and mdvd subtitle formats.

Time values are floats, in seconds with millisecond precision.