Cool, this looks perfect.

I've installed it and the relevant PERL modules on my back end server (Ubuntu Feisty)

It would appear that mplayer is going to have to be recompiled , everything works OK up until the point of launching the file to be streamed and this is noted in the console;

"Use of uninitialized value in pattern match (m//) at /home/mythtv/.mediaserv/770-encode.pl line 304.
Use of uninitialized value in pattern match (m//) at /home/mythtv/.mediaserv/770-encode.pl line 304.
mplayer doesn't support lavc encoder"