[vlc] Re: DVB-T tuning problem

[Sébastien PAUSET]

I just posted the VLC debug output if it can help
http://paste.videolan.org/1498

here is my full vlm config file
http://paste.videolan.org/1501

VLC Version : 0.8.6a
I really don't understand why default parameters are given to the frontend.

Thank you very much

Sebastien.

Sebastien PAUSET a écrit :
> Hi,
>
> I have some news.
> I think some parameters (guard interval for exemple) are not correctly 
> sent to the dvb frontend.
> I did the following test:
> Manually tune the frontend with dvbtune:
>> root at koenig:~# dvbtune -f 586000000 -c 2 -tm 8 -I 2 -gi 8
>> Using DVB card "DiBcom 3000MC/P"
>> tuning DVB-T (in United Kingdom) to 586000000 Hz
>> polling....
>> Getting frontend event
>> FE_STATUS:
>> polling....
>> Getting frontend event
>> FE_STATUS: FE_HAS_SIGNAL FE_HAS_LOCK FE_HAS_CARRIER FE_HAS_SYNC
>> Bit error rate: 2097151
>> Signal strength: 34685
>> SNR: 0
>> FE_STATUS: FE_HAS_SIGNAL FE_HAS_LOCK FE_HAS_CARRIER FE_HAS_SYNC
>
> looks great.
> then I check the adapter current parameters:
>
>> root at koenig:~# dvbsnoop -adapter 2 -s feinfo
>> (...)
>>
>> Current parameters:
>>     Frequency:  586000.000 kHz
>>     Inversion:  AUTO
>>     Bandwidth:  8 MHz
>>     Stream code rate (hi prio):  FEC 3/4
>>     Stream code rate (lo prio):  FEC 1/2
>>     Modulation:  QAM 64
>>     Transmission mode:  8k mode
>>     Guard interval:  1/8
>>     Hierarchy:  none
> ok.
> then I launch VLC with the following VLM config file section:
>
>> new R1 broadcast enabled
>> setup R1 input dvb://
>> setup R1 option dvb-adapter=2
>> setup R1 option ts-es-id-pid
>> setup R1 option programs=257,259,260,261,262,273
>> setup R1 option dvb-frequency=586000000
>> setup R1 option sout-standard-access=udp
>> setup R1 option sout-standard-mux=ts
>> setup R1 option dvb-guard=8
>> setup R1 option dvb-transmission=8
>> setup R1 output 
>> #duplicate{dst=std{dst=239.255.40.2},select="program=257",dst=std{dst=239.255.40.3},select="program=259",dst=std{dst=239.255.40.4},select="program=260",dst=std{dst=239.255.40.5},select="program=261",dst=std{dst=239.255.40.9},select="program=262",dst=std{dst=239.255.40.10},select="program=273") 
>>
> tuning still fails, and if I check the adapter current setting, I get:
>
>> root at koenig:~# dvbsnoop -adapter 2 -s feinfo
>> (...)
>> Current parameters:
>>     Frequency:  586000.000 kHz
>>     Inversion:  AUTO
>>     Bandwidth:  AUTO
>>     Stream code rate (hi prio):  FEC 1/2
>>     Stream code rate (lo prio):  FEC 1/2
>>     Modulation:  QPSK
>>     Transmission mode:  2k mode
>>     Guard interval:  1/32
>>     Hierarchy:  none
> As you can see, the guard interval and the transmission mode are not 
> the one I specified in the config file.
>
> Is there a priority for options?
> Any idea?
>
> Thanks
>
> regards, Sebastien.
>
>
>
>
> Sébastien PAUSET wrote:
>> Christophe Massiot a écrit :
>>> On Sun, Feb 25, 2007, Sébastien PAUSET wrote:
>>>
>>>  
>>>> thank you for your response,
>>>> unfortunately, I already tried to add these offset values, and it 
>>>> doesn't help.
>>>> I tried +/-166000, +/-332000 and +/-498000.
>>>> I still got the error message
>>>> [00000387] [Média: France5] dvb access warning: no lock, tuning again
>>>> [00000355] [Média: France2] dvb access warning: no lock, tuning again
>>>> [00000374] [Média: France3] dvb access warning: no lock, tuning again
>>>> [00000381] [Média: LCP] dvb access warning: no lock, tuning again
>>>> I keep on looking for a solution, thank you very much for your fast 
>>>> responses.
>>>>     
>>>
>>> Make sure that you do not have a vlcrc preferences file lying around,
>>> and delete it if it does. You may also want to specify the guard
>>> interval manually.
>>>
>>> And yes, one card per frequency is enough :).
>>>   
>>
>> Thanks a lot :-)
>> I'll check that.
>> I think I already tried to set the guard interval manually, but I'm 
>> not sure (did so many tests :-p )
>> I'll try that again.
>>
>> I will send you a feedback.
>>
>> Thank you very much once again for your responses.
>>
>

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