Opened 6 years ago
Closed 4 years ago
#13222 closed Bug Report - General (Fixed)
Channel scan with DVB-T2-capable tuner giving bad channel numbers
Reported by: | Owned by: | Klaas de Waal | |
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Priority: | minor | Milestone: | 31.0 |
Component: | MythTV - Channel Scanner | Version: | Master Head |
Severity: | medium | Keywords: | |
Cc: | Ticket locked: | no |
Description
PCTV-290e, current master, fedora 26 qam_64:698000000:BBC ONE E Mid::0:9018:*4166*:4166=4166:dvb 0:cnt(pnum:1,channum:172) qam_64:698000000:BBC TWO::0:9018:*4287*:4166=4166:dvb 0:cnt(pnum:1,channum:172) qam_64:698000000:BBC NEWS::0:9018:*4352*:4166=4166:dvb 0:cnt(pnum:1,channum:172) qam_64:698000000:BBC Red Button::0:9018:*4416*:4166=4166:dvb 0:cnt(pnum:1,channum:172) qam_64:698000000:BBC FOUR::0:9018:*4544*:4166=4166:dvb 0:cnt(pnum:1,channum:172) The numbers marked above are being displayed instead of the correct ones marked below. DVB-T-only tuner qam_64:698000000:BBC ONE E Mid:*1*:12323:9018:4166:4166=4166:dvb 0:cnt(pnum:1,channum:1) qam_64:698000000:BBC TWO:*2*:12323:9018:4287:4166=4166:dvb 0:cnt(pnum:1,channum:1) qam_64:698000000:BBC NEWS:*231*:12323:9018:4352:4166=4166:dvb 0:cnt(pnum:1,channum:1) qam_64:698000000:BBC Red Button:*250*:12323:9018:4416:4166=4166:dvb 0:cnt(pnum:1,channum:1)
Attachments (2)
Change History (13)
comment:1 Changed 6 years ago by
Milestone: | needs_triage → 30.0 |
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Status: | new → infoneeded_new |
Version: | Unspecified → Master Head |
Changed 6 years ago by
Attachment: | DVB_TuningTest2.txt added |
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Part output of "mythtvsetup --verbose channel,chanscan,siparser,record"
comment:2 Changed 6 years ago by
It shot off the top of the screen but here's what looks like the most relevant part. I should be able to capture more if you need it.
The scan was of the main HD mux at 770 MHz. Data for the BBC HD mux for which 9018:4166 apply.
comment:3 Changed 6 years ago by
Correction. The data in the attachment refer to the SD mux but were obtained from a scan of the HD mux.
Changed 6 years ago by
Attachment: | DVBTuningTests3.txt added |
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Full log of "mythtvsetup --verbose channel,chanscan,siparser,record | tee ~/Documents/DVBTuningTests3.txt"
comment:4 Changed 6 years ago by
I don't know if this is significant, but I just scanned with the same device on a 'buntu xenial laptop. Channel numbers were good with 30-pre-438 and 30-pre-484. It's the only tuner on the laptop. I haven't often used it on the Fedora box, where it was 'competing with' an SD tuner. Something might not have been quite right. I think that was 30-pre-484 too. Possibly apologies are appropriate.
comment:5 Changed 6 years ago by
Another single-mux scan on the Fedora system, where the two-device setup now seems OK, still gave the bad channel numbers. 30-pre-512, Qt 5.9.4
comment:6 Changed 6 years ago by
The laptop from comment 4 is now on 30-pre-556. Yesterday I found that BBC FOUR HD was not working. It seems that the '700 MHz clearance programme' had swapped the muxes on 754 MHz (now QAM-256) and 602 MHz (now QAM-64), and several attempted retunes all gave failed recordings. What eventually worked was deleting both those transports, rescanning with seek-new-linked-transports enabled and scanning yet again on 754 MHz only.
The ubuntu/Fedora channel numbers puzzle persists, but my TV and the Fedora box could both see all the revised muxes without my knowingly having taken special measures during tuning.
comment:7 Changed 5 years ago by
Milestone: | 30.0 → 30.1 |
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comment:8 Changed 4 years ago by
Milestone: | 30.1 → 31.0 |
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Owner: | set to Klaas de Waal |
Can you please check if this problem is still present when doing a scan with the current pre-v31 master mythtv-setup?
comment:9 Changed 4 years ago by
Component: | MythTV - General → MythTV - Channel Scanner |
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comment:10 Changed 4 years ago by
I have just rescanned 'all known transports' for DVB-T and DVB-T2. The EPG shows 4 channels with LCNs outside the normal range (1 to 800) but the tuning log and my TV have them between 790 and 795, numbers which seem to be used for recent or upcoming changes. I think the ticket can be closed. Thank you.
v31-Pre-9eba7cc9449, Branch: devel/2019-render, Mygica T230 DVB-T/T2/C, Philips TDA10046H DVB-T
comment:11 Changed 4 years ago by
Resolution: | → Fixed |
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Status: | infoneeded_new → closed |
It looks like it's missing the LCN (Logical Channel Number) which is usually signalled in the UK.
Can you grab the output of running
# mythtv-setup --verbose channel,chanscan,siparser,record
it should be sufficient to rescan just the multiplex that broadcasts these channels.
Regards Stuart