First off, this thread is pretty much dead, the discussion of DVB subs is now here:
New DVB subtitle filter (TsReader based)
Secondly, i dont think i understand your question. What are you trying to do?
It sounds like you want to generate .ts files with subtitles yourself (why?)?
In that case you probably want to read the relevant standard documentation.
You will probably want glance at one or more of the following (just google the number as written):
ETSI EN 300 468 "Specification for Service Information (SI) in DVB systems"
ETS 300 743 "Subtitling systems"
ETSI EN 300 472 "Specification for conveying ITU-R System B Teletext in DVB bitstreams" (in case you need to supply teletext subs).
You might also want to look at :
http://www.acessibilidade.net/tdt/DV...itling_FAQ.pdf