[vlc] Re: DVB-T tuning problem

[PAUSET Sebastien]

Hi,

I just wanted to keep you informed on this issue.
The problem is now solved, the guard interval is now correctly set by 
VLC thanks to the upgrade of the card driver.
the kernel 2.6.21 has a correct driver.

I now have 18 TV channels thanks to you :-)
thank you very much

best regards,
Sebastien.


Sébastien PAUSET a écrit :
> 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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