Tvheadend

after some hours i think that i can solve the situation better with some dvb-c tuners... cable is also available

Do you want transcoding or just pass-through?

Without transcoding you don't need a big machine. A Raspberry Pi based server could handle 5-6 client with ease.

with transcoding.... i have also a server machine but i think its oversized

dual xeon 2690v2 socket 2011 and 64gb memory each cpu

Transcoding of what, to what is then your major limiting factor. Transcoding to SD MPEG-2 is light enough... transcoding 4k H.265/HEVC is a different story altogether.... doing it to multiple streams in realtime, and you need a serious (and I mean serious!) machine. Since I'd guess that dual Xeon ~ perhaps 6 x top-end i7... not that over-spec'ed if you're transcoding that many streams; I suspect it'd struggle with that many high profile H.264 realtime outputs, for example, so you'd still have to trade something. Run some concurrent Handbrake/x.264 jobs and see what it can do and see the balance of quality vs time/CPU effort.

Streaming, you can get a view in terms of the bitrate of your sources, the number of sources, and thus the concurrent bandwidth you need from both HDD I/O (if they're local files) and network I/O (local or live streams); RAM will help cache things, assuming you can read from disc faster than it's needed (which should be the case but might start to struggle if you have energy-efficient/long-life HDDs and lots of simultaneous streams - I presume transcoding buffers to disk somewhere). Even your disc config can help in that instance.

OS... well, tvh is a Linux application, so I doubt you'd get many votes for anything else

as first... i want to stream HD live TV only... no 4k

but thank you for your help...

now i need some infos if i should use dvb-c or dvb-s and which tuner models

find a good product... Haupauge TV-HVR-2205

is this version or card supported by tvheadend?

It's only a DVB-T card if I read it right. So it depends only the linux firmware Tvheadend could use it. If a good, stable firmware exists, you can use it with tvh.

or Digital Devices Max S8 TV Card for sat solution