stmconvert takes an .stm file such as those
generated by "transcriber" (http://trans.sf.net/)
(apt install transcriber under Debian)
and makes .srt subtitles, pretty free-form text, or
pretty free-form html transcription output.
The intent is to provide the ability to maintain
a single original source of a transcript in stm
or native transcriber format from which srt, text,
and html can be generated after editing or
translating the source.