[mythtv-users] MythTv can't tune some channels with HDHomeRun

[Nathaniel Rutman]

/usr/lib/libmyth-0.20.2.so.0 from latest mythbuntu


So I do the MythTV channel scan thing with QAM-256.
Finds a bunch of channels.  But MythTV frontend ("watch live tv")
can only seem to lock onto some of them.  Channels 112-117 come in
fine; channels 76-91 can't get a lock with Myth "(l___) lock".

Using vlc and setting
hdhomerun_config FFFFFFFF set /tuner0/program <number>
does get _all_ the channels.

So I'm trying to figure out:
a. what's the difference between the channels Myth can tune and those it
can't?
b. why doesn't Myth set the /tuner0/program #?  (get /tuner0/program 
always returns 0, even on those channels myth does tune).  Is there
a way I can get it to?
c. is ss=60 (signal strength) awful?  Myth can lock on with with ss=67, 
and as I said, I can tune the ss=60 with vlc just fine.

dtv_multiplex is right, channels are right, mythdb's "serviceid" =
correct program id.



HDHomeRun scan reports:
SCANNING: 537000000 (us-cable:76, us-irc:76)
LOCK: qam256 (ss=60 snq=41 seq=100)
PROGRAM: 2: 32.1 KWBP-Po
PROGRAM: 3: 12.1 Fox 12
...
SCANNING: 751750000 (us-hrc:117)
LOCK: (ntsc) (ss=70 snq=0 seq=0)
SCANNING: 753000000 (us-cable:117, us-irc:117)
LOCK: qam256 (ss=67 snq=61 seq=100)
PROGRAM: 1: 0.0 (encrypted)
PROGRAM: 2: 0.0 (encrypted)
PROGRAM: 3: 0.0 (encrypted)
PROGRAM: 4: 0.0 (encrypted)
PROGRAM: 5: 0.0 (encrypted)
PROGRAM: 6: 0.0 (encrypted)
PROGRAM: 7: 0.0 (encrypted)
PROGRAM: 8: 0.0 (encrypted)
PROGRAM: 9: 0.0 (encrypted)
PROGRAM: 10: 0.0 (encrypted)
PROGRAM: 11: 0.0 (encrypted)
PROGRAM: 1074: 0.0
PROGRAM: 1102: 0.0


mysql> select
chanid,channum,freqid,sourceid,callsign,tvformat,outputfilters,mplexid,serviceid 

from channel where freqid=76 or freqid=117;
+--------+---------+--------+----------+----------+----------+---------------+---------+-----------+
| chanid | channum | freqid | sourceid | callsign | tvformat |
outputfilters | mplexid | serviceid |
+--------+---------+--------+----------+----------+----------+---------------+---------+-----------+
|   1121 | 12_1    | 76     |        1 | Fox 12   | Default
|               |      44 |         3 |
|   1321 | 32_1    | 76     |        1 | KWBP-Po  | Default
|               |      44 |         2 |
|   2180 | 117#10  | 117    |        1 | shopping | Default
|               |      73 |      1074 |
|   2182 | 117#12  | 117    |        1 | spanish  | Default
|               |      73 |      1102 |
+--------+---------+--------+----------+----------+----------+---------------+---------+-----------+
4 rows in set (0.00 sec)


mysql> select * from channel where freqid=76 or freqid=117;
+--------+---------+--------+----------+----------+-------------------------+------+----------+--------------+------------+-------------+----------+------------+--------+-------+----------+----------+---------+---------------+---------------+---------+-----------+-----------+----------+-----------------+-----------------+
| 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 |
+--------+---------+--------+----------+----------+-------------------------+------+----------+--------------+------------+-------------+----------+------------+--------+-------+----------+----------+---------+---------------+---------------+---------+-----------+-----------+----------+-----------------+-----------------+
|   1121 | 12_1    | 76     |        1 | Fox 12   | Fox 12
HD               |      |     NULL |              |
|           0 |    32768 |      32768 |  32768 | 32768 | Default
|        0 |       1 |               |             0 |      44 |
3 |      NULL |        0 |              12 |               1 |
|   1321 | 32_1    | 76     |        1 | KWBP-Po  | KWBP-Portland's CW
Digi |      |     NULL |              |            |           0 |
32768 |      32768 |  32768 | 32768 | Default  |        0 |       1
|               |             0 |      44 |         2 |      NULL
|        0 |              32 |               1 |
|   2180 | 117#10  | 117    |        1 | shopping |
Loading...              |      |     NULL |              | Loading...
|           0 |    32768 |      32768 |  32768 | 32768 | Default
|        0 |       1 |               |             0 |      73 |
1074 |      NULL |        0 |               0 |               0 |
|   2182 | 117#12  | 117    |        1 | spanish  |
Loading...              |      |     NULL |              | Loading...
|           0 |    32768 |      32768 |  32768 | 32768 | Default
|        0 |       1 |               |             0 |      73 |
1102 |      NULL |        0 |               0 |               0 |
+--------+---------+--------+----------+----------+-------------------------+------+----------+--------------+------------+-------------+----------+------------+--------+-------+----------+----------+---------+---------------+---------------+---------+-----------+-----------+----------+-----------------+-----------------+
4 rows in set (0.00 sec)

mysql> select * from dtv_multiplex where mplexid=44 or mplexid=73;
+---------+----------+-------------+-----------+-----------+-----------+------------+------+----------+------------+-----------+--------------+-------------------+----------------+---------+---------------+-----------+--------------+------------+----------------+---------------------+
| 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     |
+---------+----------+-------------+-----------+-----------+-----------+------------+------+----------+------------+-----------+--------------+-------------------+----------------+---------+---------------+-----------+--------------+------------+----------------+---------------------+
|      44 |        1 |        NULL |      NULL | 537000000 | NULL
|       NULL | NULL | NULL     | qam_256    | NULL      | NULL         |
NULL              | NULL           |       0 | NULL          | NULL
| NULL         | atsc       |             33 | 2008-01-29 10:11:42 |
|      73 |        1 |        NULL |      NULL | 753000000 | NULL
|       NULL | NULL | NULL     | qam_256    | NULL      | NULL         |
NULL              | NULL           |       0 | NULL          | NULL
| NULL         | atsc       |             33 | 2008-01-29 10:13:42 |
+---------+----------+-------------+-----------+-----------+-----------+------------+------+----------+------------+-----------+--------------+-------------------+----------------+---------+---------------+-----------+--------------+------------+----------------+---------------------+
2 rows in set (0.00 sec)

mysql> 



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