[mythtv-users] Re: 2 DVB Problems
martin north
martin at chipsandpeas.com
Tue Dec 23 07:09:47 EST 2003
dont know if this is your problem or not, but I always set the bandwidth and
guard interval rather than leave it to "auto". I use a DVB-T in the UK
though.
I have found that DVB cards, drivers and applications dont often
"autodetect" the correct settings. In my particular case it never detected
the correct Inversion setting.
Have you tried the 'scan' application that comes with the DVB drivers?
Assuming that scan works, i would try to extract as much detail as possible
from the resulting channel dump and fill up your tables accordingly....
Aike Terjung writes:
> Hi,
>
> these are the myqsl outputs:
> mysql> select * from dvb_channel;
> +--------+-----------+-----------+------------+-------------+-----------+----
> -------+------------+------+----------+-------+------------+-----------+-----
> ---------+-------------------+----------------+-----------+
>
> | chanid | serviceid | networkid | providerid | transportid | frequency |
>
> inversion | symbolrate | fec | polarity | satid | modulation | bandwidth |
> lp_code_rate | transmission_mode | guard_interval | hierarchy |
> +--------+-----------+-----------+------------+-------------+-----------+----
> -------+------------+------+----------+-------+------------+-----------+-----
> ---------+-------------------+----------------+-----------+
>
> | 1021 | 28114 | NULL | NULL | NULL | 410000000 | 0
> | 6900000 | none | v | NULL | qam_64 | NULL | auto
> | 0 | auto | 0 |
> | 1039 | 28204 | NULL | NULL | NULL | 426000000 | 0
> | 6900000 | none | v | NULL | qam_64 | NULL | auto
> | 0 | auto | 0 |
> | 1000 | 28106 | NULL | NULL | NULL | 410000000 | 0
> | 6900000 | none | v | NULL | qam_64 | NULL | auto
> | 0 | auto | 0 |
> | 1001 | 28006 | NULL | NULL | NULL | 394000000 | 0
> | 6900000 | none | v | NULL | qam_64 | NULL | auto
> | 0 | auto | 0 |
> | 1033 | 28228 | NULL | NULL | NULL | 426000000 | 0
> | 6900000 | none | v | NULL | qam_64 | NULL | auto
> | 0 | auto | 0 |
> | 1023 | 28112 | NULL | NULL | NULL | 410000000 | 0
> | 6900000 | none | v | NULL | qam_64 | NULL | auto
> | 0 | auto | 0 |
> | 1003 | 28111 | NULL | NULL | NULL | 410000000 | 0
> | 6900000 | none | v | NULL | qam_64 | NULL | auto
> | 0 | auto | 0 |
> | 1024 | 28108 | NULL | NULL | NULL | 410000000 | 0
> | 6900000 | none | v | NULL | qam_64 | NULL | auto
> | 0 | auto | 0 |
> | 1028 | 28014 | NULL | NULL | NULL | 394000000 | 0
> | 6900000 | none | v | NULL | qam_64 | NULL | auto
> | 0 | auto | 0 |
> | 1027 | 28203 | NULL | NULL | NULL | 426000000 | 0
> | 6900000 | none | v | NULL | qam_64 | NULL | auto
> | 0 | auto | 0 |
> | 1029 | 28201 | NULL | NULL | NULL | 426000000 | 0
> | 6900000 | none | v | NULL | qam_64 | NULL | auto
> | 0 | auto | 0 |
> | 1030 | 28108 | NULL | NULL | NULL | 410000000 | 0
> | 6900000 | none | v | NULL | qam_64 | NULL | auto
> | 0 | auto | 0 |
> | 1031 | 28108 | NULL | NULL | NULL | 410000000 | 0
> | 6900000 | none | v | NULL | qam_64 | NULL | auto
> | 0 | auto | 0 |
> | 1040 | 28011 | NULL | NULL | NULL | 394000000 | 0
> | 6900000 | none | v | NULL | qam_64 | NULL | auto
> | 0 | auto | 0 |
> | 1041 | 28008 | NULL | NULL | NULL | 394000000 | 0
> | 6900000 | none | v | NULL | qam_64 | NULL | auto
> | 0 | auto | 0 |
>
> +--------+-----------+-----------+------------+-------------+-----------+----
> -------+------------+------+----------+-------+------------+-----------+-----
> ---------+-------------------+----------------+-----------+
>
> mysql> select * from dvb_pids;
> +--------+-----+------+------+
>
> | chanid | pid | type | lang |
>
> +--------+-----+------+------+
>
> | 1039 | 401 | v | |
> | 1023 | 702 | a | |
> | 1003 | 601 | v | |
> | 1021 | 901 | v | |
> | 1000 | 101 | v | |
> | 1001 | 110 | v | |
> | 1033 | 401 | v | |
> | 1024 | 301 | v | |
> | 1039 | 402 | a | |
> | 1023 | 701 | v | |
> | 1003 | 602 | a | |
> | 1021 | 902 | a | |
> | 1000 | 102 | a | |
> | 1001 | 120 | a | |
> | 1024 | 302 | a | |
> | 1033 | 402 | a | |
> | 1028 | 660 | v | |
> | 1027 | 301 | v | |
> | 1027 | 302 | a | |
> | 1028 | 670 | a | |
> | 1029 | 101 | v | |
> | 1029 | 102 | a | |
> | 1030 | 301 | v | |
> | 1031 | 302 | a | |
> | 1031 | 301 | v | |
> | 1040 | 610 | v | |
> | 1040 | 620 | a | |
> | 1041 | 320 | a | |
> | 1041 | 310 | v | |
>
> +--------+-----+------+------+
>
> I am using DVB-C in NRW in Germany. The Cable Provider is ish.
>
> and here is the output of mythbackend with -v channel
>
> gargarmel:/home/aike# mythbackend -v channel
> Starting up as the master server.
> 2003-12-23 10:41:32 Probed: /dev/video - Television
> 2003-12-23 10:41:32 Probed: /dev/video - Composite1
> 2003-12-23 10:41:32 Probed: /dev/video - S-Video
> 2003-12-23 10:41:32 Probed: /dev/video - Composite3
> 2003-12-23 10:41:32 Probed: /dev/video - Television
> 2003-12-23 10:41:32 Probed: /dev/video - Composite1
> 2003-12-23 10:41:32 Probed: /dev/video - S-Video
> 2003-12-23 10:41:32 Probed: /dev/video - Composite3
> 2003-12-23 10:41:33 DVB#0 Using DVB card 0, with frontend VES1820 based DVB-C
> frontend.
> 2003-12-23 10:41:33 DVB#0 Trying to tune to channel 1027.
> 2003-12-23 10:41:33 DVB#0 Frequency: 426000000 Symbol Rate: 6900000. Inv:Off
> Fec:None Mod:64
> 2003-12-23 10:41:33 DVB#0 Waiting for frontend event after tune.
> 2003-12-23 10:41:33 DVB#0 WARNING - Status: CARRIER | VITERBI | SIGNAL | NO
> LOCK!
> 2003-12-23 10:41:34 DVB#0 Status: CARRIER | VITERBI | SIGNAL | SYNC | LOCK.
> 2003-12-23 10:41:34 Enabled verbose msgs : important general channel
> 2003-12-23 10:41:36 Found changes in the todo list.
> 2003-12-23 10:41:36 Started recording "Wissenschaft: Schwerpunkt
> " on channel: 1040 on cardid: 2, sourceid 2
> 2003-12-23 10:41:36 DVB#0 Trying to tune to channel 1040.
> 2003-12-23 10:41:36 DVB#0 Frequency: 394000000 Symbol Rate: 6900000. Inv:Off
> Fec:None Mod:64
> 2003-12-23 10:41:36 DVB#0 Waiting for frontend event after tune.
> 2003-12-23 10:41:36 DVB#0 WARNING - Status: NO LOCK!
> 2003-12-23 10:41:37 DVB#0 Status: CARRIER | VITERBI | SIGNAL | SYNC | LOCK.
> 2003-12-23 10:41:37 Changing from None to RecordingOnly
> 2003-12-23 10:41:37 DVB#0 Recorder: Card opened successfully.
> 2003-12-23 10:41:38 DVB#0 WARNING - No data from card in 1 second.
> 2003-12-23 10:41:39 DVB#0 WARNING - No data from card in 1 second.
> 2003-12-23 10:41:40 DVB#0 WARNING - No data from card in 1 second.
> 2003-12-23 10:41:41 DVB#0 WARNING - No data from card in 1 second.
> 2003-12-23 10:41:42 DVB#0 WARNING - No data from card in 1 second.
> 2003-12-23 10:41:43 DVB#0 WARNING - No data from card in 1 second.
> 2003-12-23 10:41:44 DVB#0 WARNING - No data from card in 1 second.
> 2003-12-23 10:41:45 DVB#0 WARNING - No data from card in 1 second.
> 2003-12-23 10:41:46 DVB#0 WARNING - No data from card in 1 second.
>
> i tried to tune to the channel with czap and record with ts2ps after this but
> the size of the resulting file is also 0 bytes.
> Also unloading the dvb modules and reloading them does not help only rebooting
> helps.
>
> could this problem cause by mythtv holding the card "opend" without recording
> for a long time? This problem will not appear when i stop the mythtv-backend
> just after a reboot, wait 2 hours and than start myth-backend and record
> directly.
>
> cu Aike
>
> Am Montag, 22. Dezember 2003 15:19 schrieb Kenneth Aafløy:
>> Hi!
>>
>> > Hello,
>> >
>> > i have the same problem until now, changing the FEC value
>> > doesn't help me out.
>> > DVB Recording will result in this message, when mythbackend
>> > is running some
>> > time without recording:
>> >
>> > 2003-12-22 13:24:28 Started recording "Wissenschaft: Schwerpunkt
>> > " on channel: 1040 on cardid: 2, sourceid 2
>> > 2003-12-22 13:24:29 DVB#0 WARNING - Status: NO LOCK!
>> > 2003-12-22 13:24:29 Changing from None to RecordingOnly
>> > 2003-12-22 13:24:29 DVB#0 Recorder: Card opened successfully.
>> > 2003-12-22 13:24:30 DVB#0 WARNING - No data from card in 1 second.
>> > 2003-12-22 13:24:31 DVB#0 WARNING - No data from card in 1 second.
>> > 2003-12-22 13:24:32 DVB#0 WARNING - No data from card in 1 second.
>> > ...
>> >
>> > this is realy not what i like to see there.
>>
>> Try running the backend with 'mythbackend -v channel', which will be a
>> bit more informative when tuning. It looks like you have either a bad
>> signal, or have some of the parameters slightly off. Also send a dump of
>> the dvb_channel and dvb_pids tables, with info on what location you are
>> trying to receive:
>>
>> # mysql -u <mythuser> -p -h <mythhost> mythconverg
>> mysql> select * from dvb_channel;
>> mysql> select * from dvb_pids;
>>
>> Kenneth
>>
>> _______________________________________________
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>> mythtv-users at mythtv.org
>> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>
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