yeah, i have the same problem. don't know how to add IPTV Streams.
To answer your Question Niels, i read somewhere in the XBMC Forum that http streams are not supported by TVHeadend.
So i'm wondering if there maybe other formats that works?
For me, the streams looks like this:
#EXTINF:-1 CHANNEL-NAME
rtmp://$OPT:rtmp-raw=rtmp://SERVER-IP/liverepeater playpath=XXXX pageUrl=
http://url.com
or
#EXTINF:-1 CHANNEL-NAME
rtmp://$OPT:rtmp-raw=rtmp://SERVER-IP/liverepeater playpath=XXXX swfUrl=http://url.com/playlistname.swf live=1 pageUrl=http://url.com token=#atd%#$ZH live=N.SAT
and i have absolutely no clue how to add them. Also the official documentation is from 2012 and is outdated.
I already enabled IPTV under Configuration -> DVB Inputs -> Networks
Than i wanted to add a Stream under Configuration -> DVB Inputs -> Muxes -> Add -> IPTV Network
but than i'm stuck. No idea what to add here.