[vdr] Re: DVB-T and channels.conf

Marcel Wiesweg marcel.wiesweg at gmx.de
Sat Jun 18 23:29:09 CEST 2005


Am Freitag 17 Juni 2005 21:57 schrieb Rainer Zocholl:
> Hello
>
> recently i already reported about a wiered problem
>
> VDR generates 2 channels.conf entries for every DVB-T channel.
>
> Example:
>
> VOX;RTL
> World:666000:I0C23D0M16B8T8G8Y0:T:27500:545:546=deu:551:0:16418:8468:8706:0
> VOX;RTL World:666000:I0C23D0M16B8T8G8Y0:T:27500:0:0:0:0:16418:8468:2818:0
>
> I would not care about it, but i get the
> EPG infos only on the second entry. But there is no
> video.

I had these problems here in the Ruhrgebiet/Düsseldorf region when the 
frequency layout was changed in April. Somehow VDR did not get the changes 
right, don't know if that was possible at all. Solution was to replace 
channels.conf with the new one from VDR wiki.

>
> Why does EGP get not infos at the first entry, which looks much
> less broken that the second?

The second line has no audio/video PIDs, so no audio/video reception.
The two lines have different service IDs - so they refer to different 
services. The EIT table contains a field service_id, and VDR has to associate 
the EPG info from that table to a channel with this service ID. If the EIT 
for VOX refers to the service ID 2818, only the channels for the second line 
will have EPG.
The PIDs are set from data in the PMT table.

>
>
> Any usefull step to narrow the problem?

If the pragmatical solution (new channels.conf) does not work, you might want 
to analyze the relevant SI information: 
Install dvbsnoop. For command line options, read their examples list.
Retrieve the PAT at PID 0x00.
Retrieve the PMT for VOX at the PID given by the PAT.
Read the EITs at PID 0x12 and find the one for VOX. Look at the service ID it 
refers to.

Marcel

>
>
>
> vdr 1.3.25 (LNBshared)
>
>
>
> lspci says:
> 0000:00:09.0 0480: 1131:7146 (rev 01) TT FF DVB-S
>
> 0000:00:0a.0 0400: 109e:036e (rev 11) AverMedia DVB-T 771
> 0000:00:0a.1 0480: 109e:0878 (rev 11)
>
> 0000:00:0b.0 0480: 1131:7146 (rev 01) TT FF DVB-S
> 0000:00:0c.0 -
> 0000:00:0d.0 0480: 1131:7146 (rev 01) TT FF DVB-S
>
>
>
> 0000:00:09.0 Multimedia controller: Philips Semiconductors SAA7146 (rev 01)
>
> 0000:00:0a.0 Multimedia video controller: Brooktree Corporation Bt878 Video
> Capture (rev 11) 0000:00:0a.1 Multimedia controller: Brooktree Corporation
> Bt878 Audio Capture(rev 11)
>
> 0000:00:0b.0 Multimedia controller: Philips Semiconductors SAA7146 (rev 01)
> 0000:00:0d.0 Multimedia controller: Philips Semiconductors SAA7146 (rev 01)
> Rainer---<=====>                         Vertraulich
>              //
>            //
>          <=====>--------------ocholl, Kiel, Germany ------------
>
>
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