From: Craig on
Haven't tried it.

> Aegisub is an advanced subtitle editor that assists in the creation
> of subtitles, translations, and complex overlays using audio or
> video. Developed by enthusiasts it builds on workflows created and
> perfected through professional, hobby, and everyday use.

<http://www.aegisub.org/>

What caught my eye about this is it's F/OSS and has just been ported to
Unix. IOW, it's been on Winderz for a while apparently.

--
-Craig