[mythtv] Problems tuning ATSC w/ HDHR and 0.21? LaGv Partial Lock?
Derek Atkins
warlord at MIT.EDU
Fri May 30 15:03:16 UTC 2008
Hi again,
> SCANNING: 635000000 (us-bcast:41)
> LOCK: 8vsb (ss=82 snq=37 seq=100)
> PROGRAM: 3: 56.1 WLVI-DT (no data)
>
> So, why is channel 56_1 pointing to channel 7_1 when it tries to tune?
I tracked it down. For some reason it was pointing at the wrong
mplexid.
mysql> select * from channel where channum=56.1;
+--------+---------+--------+----------+----------+----------------------------+------+----------+--------------+---------+-------------+----------+------------+--------+-------+----------+----------+---------+---------------+---------------+---------+-----------+-----------+----------+-----------------+-----------------+---------------------+-------------------+------------+
| chanid | channum | freqid | sourceid | callsign | name | icon | finetune | videofilters | xmltvid | recpriority | contrast | brightness | colour | hue | tvformat | commfree | visible | outputfilters | useonairguide | mplexid | serviceid | atscsrcid | tmoffset | atsc_major_chan | atsc_minor_chan | last_record | default_authority | commmethod |
+--------+---------+--------+----------+----------+----------------------------+------+----------+--------------+---------+-------------+----------+------------+--------+-------+----------+----------+---------+---------------+---------------+---------+-----------+-----------+----------+-----------------+-----------------+---------------------+-------------------+------------+
| 5561 | 56.1 | 42 | 5 | WLVI-DT | WLVI Boston's CW Digital-1 | | 0 | | 32633 | 0 | 32768 | 32768 | 32768 | 32768 | ATSC | 0 | 1 | | 1 | 133 | 3 | NULL | 0 | 56 | 1 | 0000-00-00 00:00:00 | | -1 |
But...
mysql> select * from dtv_multiplex where sourceid=5;
+---------+----------+-------------+-----------+-----------+-----------+------------+------+----------+------------+-----------+--------------+-------------------+----------------+---------+---------------+-----------+--------------+------------+----------------+---------------------+
| mplexid | sourceid | transportid | networkid | frequency | inversion | symbolrate | fec | polarity | modulation | bandwidth | lp_code_rate | transmission_mode | guard_interval | visible | constellation | hierarchy | hp_code_rate | sistandard | serviceversion | updatetimestamp |
+---------+----------+-------------+-----------+-----------+-----------+------------+------+----------+------------+-----------+--------------+-------------------+----------------+---------+---------------+-----------+--------------+------------+----------------+---------------------+
[snip]
| 133 | 5 | NULL | NULL | 641000000 | a | 0 | auto | v | 8vsb | a | auto | a | auto | 0 | 8vsb | a | auto | atsc | 33 | 2008-05-29 18:40:03 |
| 132 | 5 | NULL | NULL | 635000000 | a | 0 | auto | v | 8vsb | a | auto | a | auto | 0 | 8vsb | a | auto | atsc | 33 | 2008-05-29 18:40:01 |
As you can see based on the scan, it really wants mplexid 132 (and freqid
41). Once I change the mplexid the station tunes.
Weird. Looks like a bug in the scanner?
-derek
--
Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
Member, MIT Student Information Processing Board (SIPB)
URL: http://web.mit.edu/warlord/ PP-ASEL-IA N1NWH
warlord at MIT.EDU PGP key available
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