Extract closed captions from your edited video:$ ccextractor -srt edited-video.mpg
This will create a text file called edited-video_1.srt that contains the captions.
Create the spumux configuration file (in this case called spumux.xml):
<subpictures>
<stream>
<textsub filename="edited-video_1.srt" characterset="ISO8859-1"
fontsize="24.0" font="arial.ttf" horizontal-alignment="left"
vertical-alignment="bottom" left-margin="60" right-margin="60"
top-margin="20" bottom-margin="30" subtitle-fps="29.97"
movie-fps="29.97" movie-width="720" movie-height="472"
force="yes"
/>
</stream>
</subpictures>
This file is for NTSC. The defaults in the spumux man page are for PAL.
Convert edited-video.mpg to DVD format (See my other posts) called edited-video.vob.
Insert closed captions as subtitles:$ spumux spumux.xml < edited-video.vob > edited-video-with-subs.vob
Test with mplayer dvd:// -dvd-device dvd -sid 0
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