[mythtv-users] How do you "tune" subchannels in QAM?
Adam Gianola
devils.taco at gmail.com
Thu Mar 31 21:02:00 UTC 2005
Wow, I never would have thought of that, thanks! I also added
something similar to my database, where I used channel 18-1 (which is
cbs-HD here). I can't verify right now if it is working (at work,
too), but the backend replies it is successfully able to tune the
channel...
Now to find if it can tune subchannel 2 in a similar way...
Cheers,
Adam
On Thu, 31 Mar 2005 14:07:01 -0500, Marc Tousignant
<drayson at net1plus.com> wrote:
>
>
>
> I think I figured it out…
>
>
>
> Since I knew C82 program 1 was my local PBS I located the correct frequency
> for this channel in dtv_multiplex
>
>
>
> INSERT INTO dtv_multiplex (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) VALUES
> (89,1,NULL,NULL,573000000,'a',NULL,'auto',NULL,'qam_256','a','auto','a','auto',0,'auto','auto','auto','atsc',33,20050331082612);
>
>
>
> Using this knowledge I then changed the mplexid of the correct listing to 89
> in channel.
>
>
>
> INSERT INTO channel (chanid, channum, freqid, sourceid, callsign, name,
> icon, finetune, videofilters, xmltvid, recpriority, contrast, brightness,
> colour, hue, tvformat, commfree, visible, outputfilters, useonairguide,
> mplexid, serviceid, atscsrcid) VALUES (1802,'802','802',1,'WGBHDT','WGBHDT
> (WGBH-DT)','none',NULL,'','28055',0,32768,32768,32768,32768,'Default',0,1,'',0,89,NULL,NULL);
>
>
>
> Starting mythbackend I then saw
>
>
>
> 2005-03-31 13:55:09.792 SIParser: About to do a reset
>
> 2005-03-31 13:55:09.792 SIParser: Closing all PIDs
>
> 2005-03-31 13:55:09.792 SIParser: Using DelAllPids from SIParser which does
> nothing
>
> 2005-03-31 13:55:09.792 SIParser: Resetting all Table Handlers
>
> 2005-03-31 13:55:09.792 SIParser: SIParser Reset due to channel change
>
> 2005-03-31 13:55:09.793 DVB#0 DVB SI Table Parser Started
>
> 2005-03-31 13:55:09.793 DVB#0 Using DVB card 0, with frontend pcHDTV HD3000
> HDTV.
>
> 2005-03-31 13:55:09.793 DVB#0 Trying to tune to channel 802.
>
> 2005-03-31 13:55:09.793 SIParser: Starting DVB Section Reader thread
>
> 2005-03-31 13:55:09.793 SIParser: Starting SIScanner
>
> 2005-03-31 13:55:09.794 DVB#0 Mod:
>
> 2005-03-31 13:55:09.794 SIParser: About to do a reset
>
> 2005-03-31 13:55:09.794 SIParser: Closing all PIDs
>
> 2005-03-31 13:55:09.795 SIParser: Resetting all Table Handlers
>
> 2005-03-31 13:55:09.795 SIParser: SIParser Reset due to channel change
>
> 2005-03-31 13:55:09.795 DVB#0 Waiting for frontend event after tune.
>
> 2005-03-31 13:55:10.055 DVB#0 DVB signal 977 | snr fde1 | ber 0 | unc
> 0
>
> 2005-03-31 13:55:10.055 DVB#0 Status: LOCK.
>
> 2005-03-31 13:55:10.055 SIParser: Requesting PAT
>
> 2005-03-31 13:55:10.055 DVB#0 Multiplex Locked
>
> 2005-03-31 13:55:10.055 SIParser: Adding a PMT (0) to the request list
>
> 2005-03-31 13:55:10.796 SIParser: Table[0]->RequirePIDs() == true
>
> 2005-03-31 13:55:10.797 SIParser: Adding PID 0 Filter 0 Mask ff Buffer
> 40960
>
> 2005-03-31 13:55:10.797 SIParser: Table[2]->RequirePIDs() == true
>
> 2005-03-31 13:55:10.797 SIParser: Adding PID 1ffb Filter ff Mask 0 Buffer
> 40960
>
> 2005-03-31 13:55:10.798 SIParser: Table[3]->RequirePIDs() == true
>
> 2005-03-31 13:55:10.798 SIParser: Adding PID 1ffb Filter ff Mask 0 Buffer
> 40960
>
> 2005-03-31 13:55:11.150 SIParser: PAT Version = 2
>
> 2005-03-31 13:55:11.150 SIParser: Tuned to TransportID: 32950
>
> 2005-03-31 13:55:11.150 SIParser: Services on this Transport: 1 2
>
> 2005-03-31 13:55:11.150 SIParser: Table[0]->Complete() == true
>
> 2005-03-31 13:55:11.150 SIParser: Table[1]->RequirePIDs() == true
>
> 2005-03-31 13:55:11.150 SIParser: Adding PID 0 Filter 2 Mask ff Buffer
> 40960
>
> 2005-03-31 13:55:16.059 DVB#0 Timeout Getting PMT
>
> 2005-03-31 13:55:16.059 DVB#0 ERROR - Tuning for channel #802 failed.
>
>
>
> Taking a guess I then went back and changed the serviceid to 1 because it
> was subchannel 1
>
>
>
> INSERT INTO channel (chanid, channum, freqid, sourceid, callsign, name,
> icon, finetune, videofilters, xmltvid, recpriority, contrast, brightness,
> colour, hue, tvformat, commfree, visible, outputfilters, useonairguide,
> mplexid, serviceid, atscsrcid) VALUES (1802,'802','802',1,'WGBHDT','WGBHDT
> (WGBH-DT)','none',NULL,'','28055',0,32768,32768,32768,32768,'Default',0,1,'',0,89,1,NULL);
>
>
>
> Now I am getting this in mythbackend on start
>
>
>
> 2005-03-31 13:59:22.477 SIParser: About to do a reset
>
> 2005-03-31 13:59:22.477 SIParser: Closing all PIDs
>
> 2005-03-31 13:59:22.477 SIParser: Using DelAllPids from SIParser which does
> nothing
>
> 2005-03-31 13:59:22.477 SIParser: Resetting all Table Handlers
>
> 2005-03-31 13:59:22.477 SIParser: SIParser Reset due to channel change
>
> 2005-03-31 13:59:22.478 DVB#0 DVB SI Table Parser Started
>
> 2005-03-31 13:59:22.478 SIParser: Starting DVB Section Reader thread
>
> 2005-03-31 13:59:22.478 DVB#0 Using DVB card 0, with frontend pcHDTV HD3000
> HDTV.
>
> 2005-03-31 13:59:22.478 DVB#0 Trying to tune to channel 802.
>
> 2005-03-31 13:59:22.478 SIParser: Starting SIScanner
>
> 2005-03-31 13:59:22.479 DVB#0 Mod:
>
> 2005-03-31 13:59:22.479 SIParser: About to do a reset
>
> 2005-03-31 13:59:22.480 SIParser: Closing all PIDs
>
> 2005-03-31 13:59:22.480 SIParser: Resetting all Table Handlers
>
> 2005-03-31 13:59:22.480 SIParser: SIParser Reset due to channel change
>
> 2005-03-31 13:59:22.480 DVB#0 Waiting for frontend event after tune.
>
> 2005-03-31 13:59:22.740 DVB#0 DVB signal 977 | snr fdc9 | ber 0 | unc
> 0
>
> 2005-03-31 13:59:22.740 DVB#0 Status: LOCK.
>
> 2005-03-31 13:59:22.740 SIParser: Requesting PAT
>
> 2005-03-31 13:59:22.740 DVB#0 Multiplex Locked
>
> 2005-03-31 13:59:22.740 SIParser: Adding a PMT (1) to the request list
>
> 2005-03-31 13:59:23.481 SIParser: Table[0]->RequirePIDs() == true
>
> 2005-03-31 13:59:23.481 SIParser: Adding PID 0 Filter 0 Mask ff Buffer
> 40960
>
> 2005-03-31 13:59:23.482 SIParser: Table[2]->RequirePIDs() == true
>
> 2005-03-31 13:59:23.482 SIParser: Adding PID 1ffb Filter ff Mask 0 Buffer
> 40960
>
> 2005-03-31 13:59:23.483 SIParser: Table[3]->RequirePIDs() == true
>
> 2005-03-31 13:59:23.483 SIParser: Adding PID 1ffb Filter ff Mask 0 Buffer
> 40960
>
> 2005-03-31 13:59:23.899 SIParser: PAT Version = 2
>
> 2005-03-31 13:59:23.900 SIParser: Tuned to TransportID: 32950
>
> 2005-03-31 13:59:23.900 SIParser: Services on this Transport: 1 2
>
> 2005-03-31 13:59:23.900 SIParser: Table[0]->Complete() == true
>
> 2005-03-31 13:59:23.900 SIParser: Table[1]->RequirePIDs() == true
>
> 2005-03-31 13:59:23.900 SIParser: Adding PID 30 Filter 2 Mask ff Buffer
> 40960
>
> 2005-03-31 13:59:24.121 SIParser: PMT ServiceID: 1 Version = 4
>
> 2005-03-31 13:59:24.121 SIParser: PID: 2048
>
> 2005-03-31 13:59:24.121 SIParser: Unknown descriptor, tag = 6
>
> 2005-03-31 13:59:24.121 SIParser: Unknown descriptor, tag = 134
>
> 2005-03-31 13:59:24.121 SIParser: PID: 2049
>
> 2005-03-31 13:59:24.121 SIParser: Unknown descriptor, tag = 129
>
> 2005-03-31 13:59:24.122 SIParser: PID: 2050
>
> 2005-03-31 13:59:24.122 SIParser: Unknown descriptor, tag = 129
>
> 2005-03-31 13:59:24.122 SIParser: Table[1]->EmitRequired() == true
>
> 2005-03-31 13:59:24.122 DVB#0 Successfully tuned to channel 802.
>
>
>
> I am not sure if this is really working as I am not at home to try it. Was
> playing with it during my lunch break and wont be able to try till I get
> home.
>
> My hopes are high that I am on the right track thou.
>
>
>
> >I think quite a few of us working with the hd3000 are having the same
>
> >problem and are looking for solutions. I've posted both here and in
>
> >the hd3000 forum but it seems like no one has been able to find a
>
> >solution to this problem yet. I haven't posted to myth-dev yet, but
>
> >maybe thats the place where we may find someone who knows the answer
>
> >to our question, as i think it is a problem with how mythtvsetup is
>
> >handling the hd3000-dvb. For example, when i run dvbscan -cvvv no
>
> >channel information is given, but i've seen examples with OTA ATSC
>
> >streams where channel information is explicitly supplied in the
>
> >stream. Mythtv may be looking for this and since it doesn't come
>
> >through, myth assumes the channels are 'unable to tune'.
>
> >
>
> >-Adam
>
> >
>
> >
>
> >
>
> >for reference:
>
> >http://www.xmission.com/~pchdtv/forum/viewtopic.php?t=639
>
> >http://www.xmission.com/~pchdtv/forum/viewtopic.php?t=634
>
> >http://www.gossamer-threads.com/lists/mythtv/users/121772
>
> >http://www.gossamer-threads.com/lists/mythtv/users/120911
>
> >http://www.linuxtv.org/wiki/index.php/PcHDTV
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