TVHeadend - How to search all DVB-C frequencies for TV card muxes ?

Added by Elias David 6 months ago

I can only find predefined but it is incomplete. I have no lust to manually figure out and enter them one by one.

My TV can do this automatically, can TVHeadend?

EDIT: Meant DVB-C, not DVB-T.


Replies (3)

RE: TVHeadend - How to search all DVB-C frequencies for TV card muxes ? - Added by Mark Clarkstone 6 months ago

Elias David wrote:

I can only find predefined but it is incomplete. I have no lust to manually figure out and enter them one by one.

My TV can do this automatically, can TVHeadend?

EDIT: Meant DVB-C, not DVB-T.

This is what most TV tuners do.

  • Scan all common frequencies in a range.
  • If it hits a live frequency and it has a Network Information Table (NIT), it will either, continue to scan the range - adding the frequencies to a list to be scanned afterwards, or stop the ranged scan & just scan the NIT. The first is very slow, the second is much faster.

Tvheadend usually only needs one live "seed" frequency with a NIT, it will take the frequencies in the NIT and scan those, rather than a range scan, which it can't do.

RE: TVHeadend - How to search all DVB-C frequencies for TV card muxes ? - Added by saen acro 6 months ago

TV and STB have a function unavailable in TVH named blindscan
Why not, because lot of pc tuners (99.95%) can't do simple task,
to go from beginning to end of band to see where there is a signal and to guess SimbolRate and QAM.
there is a software with can do that but need extra code to tuner driver and kernel
It's not impossible but implementation is not so PnP as you wishing.

p.s.
there is a software hack
just need implementation
https://tvheadend.org/issues/4379

RE: TVHeadend - How to search all DVB-C frequencies for TV card muxes ? - Added by Elias David 5 months ago

I already wrote a script to generate all frequenciese from 1-999 into tv headend and then let it search.

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