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No services found for mux (DVB-C) with inversion

Added by Teun Florens about 4 years ago

Hello,

Is there any way to switch on the inversion for a particular transponder mux? My Enigma2 box finds services on certain transponders which Tvheadend cannot. The difference seems to be "Inversion = On". I'm using HTS Tvheadend 4.2.9~pre+201911151752-0~built202006011817~git5bdcfd8~ubuntu18.04.1.

TIA!


Replies (19)

RE: No services found for transponders with inversion - Added by saen acro about 4 years ago

Switch to official build.

4.2.9~pre+201911151752-0~built202006011817~git5bdcfd8~ubuntu18.04.1

is not official build, its some one's build, make with unknown sources

RE: No services found for transponders with inversion - Added by Teun Florens about 4 years ago

Okay, I switched to the following build, but still no luck.

HTS Tvheadend 4.3-1896~gce0907705

Some muxes show scan result as failed but still have a number in services column. No services from these seem to be mapped though. What am I missing here?

RE: No services found for transponders with inversion - Added by saen acro about 4 years ago

Rescan all networks, then go to services use maintinence menu to remove all dead sources.

RE: No services found for transponders with inversion - Added by Teun Florens about 4 years ago

I followed all your instructions but many services are still missing. Also, I do not see an option to 'Pass specinv' anywhere in the Tvh. Do I need to build it differently to get that option?

RE: No services found for transponders with inversion - Added by saen acro about 4 years ago

There is option in tuner

Pass specinv:

Maby need to use higher level of view greater then basic

RE: No services found for transponders with inversion - Added by Teun Florens about 4 years ago

This is what I see. Does it have anything to do with the type of tuner?

RE: No services found for transponders with inversion - Added by saen acro about 4 years ago

Yon not use TRANSPONDER (DVB-S/S2) you use MUX (DVB-C)

So show now problematic MUX settings

RE: No services found for mux (DVB-C) with inversion - Added by Teun Florens about 4 years ago

Alright, updated the title and post to avoid confusion. Is specinv available for DVB-S only?

RE: No services found for mux (DVB-C) with inversion - Added by Teun Florens about 4 years ago

saen acro wrote:

Remove FEC

Set it to 'None' and forced scan. But result is the same. Is FEC related to inversion?

RE: No services found for mux (DVB-C) with inversion - Added by saen acro about 4 years ago

Who is operator you use?
Is w-scan can show chanells?

RE: No services found for mux (DVB-C) with inversion - Added by Teun Florens about 4 years ago

Yes! w_scan lists all the missing muxes and services. I still think inversion is the culprit. Is there any way to set "inversion = auto" in Tvh?

RE: No services found for mux (DVB-C) with inversion - Added by Teun Florens about 4 years ago

Okay, will do that tomorrow. But why is my Tvh not showing 'Pass specinv' option?

RE: No services found for mux (DVB-C) with inversion - Added by Flole Systems about 4 years ago

That is an option for SAT>IP Tuners only, so if you don't use SAT>IP Tuners it won't show up.

RE: No services found for mux (DVB-C) with inversion - Added by saen acro about 4 years ago

Flole Systems wrote:

That is an option for SAT>IP Tuners only, so if you don't use SAT>IP Tuners it won't show up.

this is not so true
image from dvb-c modulator

inversion <on|off|auto>

https://www.kernel.org/doc/html/v4.10/media/uapi/dvb/fe_property_parameters.html#c.fe_spectral_inversion
https://www.linuxtv.org/downloads/v4l-dvb-apis-old/frontend-properties.html#DTV-INVERSION
INVERSION_OFF Don’t do spectral band inversion.
INVERSION_ON Do spectral band inversion.
INVERSION_AUTO Autodetect spectral band inversion.

RE: No services found for mux (DVB-C) with inversion - Added by Flole Systems about 4 years ago

For Tvheadend that is true, and since this is the Tvheadend Forum and we are talking a Tvheadend issue it should be clear that when I say that it doesn't show up on any other configuration that only refers to Tvheadend. Of course you can always write a software where such an option shows up when something else is selected, however for Tvheadend that is not the case.

RE: No services found for mux (DVB-C) with inversion - Added by saen acro about 4 years ago

So in TVH is set to AUTO

By the way, there can be a problem with DVBAPI version mnagment over device.

RE: No services found for mux (DVB-C) with inversion - Added by Teun Florens about 4 years ago

saen acro wrote:

By the way, there can be a problem with DVBAPI version mnagment over device.

You might be on to something! I installed TBS drivers recently, which force the use of old API if I remember correctly? Is that the issue?

    (1-19/19)