[mythtv-users] 0Kb recordings from BBC HD

[Paul Wheeler]

On 7/28/06, Paul Wheeler <paulrwheeler at gmail.com> wrote:
>
> Dear all,
>
> I am trying to record some HD content with a view to eventually getting it
> to play back somehow. I have got the HD channels within myth but cant seem
> to record from it, the recording appears to go fine with no errors but the
> file is 0kb. Has others experienced this and do other people have this
> working. I appear to be able to get the stream from dvbstream though havent
> been able to play it back yet. I have a Nova-t and avermedia 771 cards. Any
> help / other views would be greatly appreciated.
>

Just to add some more information.

I can record all SD channels fine and that all works perfectly. I can
capture the ts stream by using tzap on bbc hd in a channels.conf file and
play it with mplayer (although not played back well).


 BBC
HD1:554000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_2_3:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE:0:0:36932
BBC
HD2:554167000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_1_2:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_32:HIERARCHY_NONE:0:0:36932

Note:I do get two bbc hd channels in the channels.conf

I then record from one
tamora ~ # tzap -c ./channels.conf "BBC HD1"
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
tuning to 554000000 Hz
video pid 0x0000, audio pid 0x0000
status 01 | signal 003a | snr ffff | ber 00000000 | unc 00000000 |
status 1f | signal 0038 | snr ffff | ber 00000000 | unc 00000000 |
FE_HAS_LOCK
status 1f | signal 0038 | snr ffff | ber 00000000 | unc 00000000 |
FE_HAS_LOCK

tamora ~ # dvbstream 8192 -o > test1.ts
dvbstream v0.5 - (C) Dave Chapman 2001-2004
Released under the GPL.
Latest version available from http://www.linuxstb.org/
Setting filter for PID 8192
Output to stdout
Streaming 1 stream
Caught signal 2 - closing cleanly.

Then play this back in mplayer. This produces a watchable video (audio bit
off). sorry dont have mplayer output but not necessary i dont think, the
pids are video 1502 and audio 1505 respectively.

I presume that the setup from the channel scan within myth is wrong somehow
(this was taken from a recent svn ~10640). The entries put in the database
for the channel are:

mysql> SELECT * FROM channel WHERE name="BBC HD1";
+--------+---------+--------+----------+----------+---------+------+----------+--------------+---------+-------------+----------+------------+--------+-------+----------+----------+---------+---------------+---------------+---------+-----------+-----------+----------+-----------------+-----------------+
| 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 |
+--------+---------+--------+----------+----------+---------+------+----------+--------------+---------+-------------+----------+------------+--------+-------+----------+----------+---------+---------------+---------------+---------+-----------+-----------+----------+-----------------+-----------------+
|   1501 | 501     |        |        1 | BBC HD1  | BBC HD1 |      |
0 |              |         |           0 |    32768 |      32768 |  32768 |
32768 | Default  |        0 |       1 |               |             1
|       7 |     36932 |      NULL |        0 |               0
|               0 |
+--------+---------+--------+----------+----------+---------+------+----------+--------------+---------+-------------+----------+------------+--------+-------+----------+----------+---------+---------------+---------------+---------+-----------+-----------+----------+-----------------+-----------------+
1 row in set (0.00 sec)

mysql> SELECT * FROM dtv_multiplex WHERE mplexid=7;
+---------+----------+-------------+-----------+-----------+-----------+------------+------+----------+------------+-----------+--------------+-------------------+----------------+---------+---------------+-----------+--------------+------------+----------------+---------------------+
| 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     |
+---------+----------+-------------+-----------+-----------+-----------+------------+------+----------+------------+-----------+--------------+-------------------+----------------+---------+---------------+-----------+--------------+------------+----------------+---------------------+
|       7 |        1 |       36868 |      9018 | 554166670 | 0
|       NULL | NULL | NULL     | qpsk       | 8         | 1/2          |
8                 | 1/32           |       0 | qam_64        | n         |
2/3          | dvb        |              0 | 2006-07-27 11:04:20 |
+---------+----------+-------------+-----------+-----------+-----------+------------+------+----------+------------+-----------+--------------+-------------------+----------------+---------+---------------+-----------+--------------+------------+----------------+---------------------+
1 row in set (0.00 sec)


Sorry for the difficult reading output from mysql. Any help on this would be
appreciated.

Paul


Thanks
>
> Paul
>
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