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Bug #2822

Mux scan fails sometimes

Added by Wesley Ellis over 9 years ago. Updated about 9 years ago.

Status:
New
Priority:
Normal
Assignee:
-
Category:
DVB
Target version:
-
Start date:
2015-05-06
Due date:
% Done:

0%

Estimated time:
Found in version:
3.9.2780
Affected Versions:

Description

Currently testing latest builds of tvheadend on RPi2 with Milhouse test builds (OpenElec).

It seems at some point after build 3.9.2690 signal strength has decreased even though nothing has changed physically with aerial position or location (UK DVB-T), Muxes which previous scanned fine are now failing to find anything. I have included some screenshots of my settings and also the status panel which shows the current signal about -86 this was previously at ~(-50)

I understand the signal strength is pretty bad anyway at -50% but it was working fine with no issues until moving to a more recent build on tvheadend. Has something changed in the latest commits which could of affected this?

Files

Screenshot from 2015-05-06 09_59_52.png (61.8 KB) Screenshot from 2015-05-06 09_59_52.png Wesley Ellis, 2015-05-06 11:02
Screenshot from 2015-05-06 10_00_05.png (131 KB) Screenshot from 2015-05-06 10_00_05.png Wesley Ellis, 2015-05-06 11:02
Screenshot from 2015-05-06 10_00_33.png (118 KB) Screenshot from 2015-05-06 10_00_33.png Wesley Ellis, 2015-05-06 11:02
Screenshot from 2015-05-06 10_01_49.png (197 KB) Screenshot from 2015-05-06 10_01_49.png Wesley Ellis, 2015-05-06 11:02
Screenshot from 2015-05-06 10_00_47.png (114 KB) Screenshot from 2015-05-06 10_00_47.png Wesley Ellis, 2015-05-06 11:02
Screenshot from 2015-05-06 10_38_14.png (128 KB) Screenshot from 2015-05-06 10_38_14.png Muxs Wesley Ellis, 2015-05-06 11:39
Screenshot from 2015-05-06 10_38_22.png (72.5 KB) Screenshot from 2015-05-06 10_38_22.png Signal Status Wesley Ellis, 2015-05-06 11:39
Screenshot from 2015-05-06 10_54_41.png (123 KB) Screenshot from 2015-05-06 10_54_41.png muxes after 5 mins Wesley Ellis, 2015-05-06 11:55
Screenshot from 2015-05-06 11_06_20.png (116 KB) Screenshot from 2015-05-06 11_06_20.png Wesley Ellis, 2015-05-06 12:06
log1.txt (86.3 KB) log1.txt First Scan Wesley Ellis, 2015-05-13 09:21
log2.txt (85.3 KB) log2.txt Second Scan Wesley Ellis, 2015-05-13 09:21
log3.txt (65.5 KB) log3.txt Manual scan of only failed muxes Wesley Ellis, 2015-05-13 09:27
tvheadend_forced_1success.log (53.6 KB) tvheadend_forced_1success.log 1/9 Default settings (forced 2nd run) John Swanson, 2015-09-10 17:51
tvheadend_forced_1success-set_oldstatus+tune_repeats_3+status_period_2000.log (58.7 KB) tvheadend_forced_1success-set_oldstatus+tune_repeats_3+status_period_2000.log 1/9 successful settings: oldstatus, tune_repeats 3, status_period 2000 John Swanson, 2015-09-10 17:51
tvheadend_forced_3success-tune_repeats_3.log (75.7 KB) tvheadend_forced_3success-tune_repeats_3.log 3/9 successful settings: tune_repeats 3 John Swanson, 2015-09-10 17:51
tvheadend_forced_4success-set_oldstatus.log (152 KB) tvheadend_forced_4success-set_oldstatus.log 5/9 successful settings: oldstatus, tune_repeats 3, status_period 500 John Swanson, 2015-09-10 17:51
tvheadend_forced_5success-set_oldstatus+tune_repeats_3.log (97.6 KB) tvheadend_forced_5success-set_oldstatus+tune_repeats_3.log 5/9 successful settings: oldstatus, tune_repeats 3 John Swanson, 2015-09-10 17:51
tvheadend_forced_5success-set_oldstatus+tune_repeats_3+status_period_500.log (78.1 KB) tvheadend_forced_5success-set_oldstatus+tune_repeats_3+status_period_500.log 5/9 successful settings: oldstatus, tune_repeats 3, status_period 500 John Swanson, 2015-09-10 17:51
tvheadend_vanilla.log (49.3 KB) tvheadend_vanilla.log All settings set to default John Swanson, 2015-09-10 17:51

History

#1

Updated by Wesley Ellis over 9 years ago

Also on another point should the signal strength be showing as -50% or 50%?

#2

Updated by B C over 9 years ago

Reception quality should only be influenced by firmware/drivers, depending on your stick these come from either a newer kernel or drivers/firmware updated in OpenElec. If nothing is found at all it could be a tvh problem for sure but as I understand it just some are not working. Can you compare if the failing muxes are still detected with the same parameters in tvh?

#3

Updated by Jaroslav Kysela over 9 years ago

The negative percentual presentation is wrong. It should be positive.

#4

Updated by Jaroslav Kysela over 9 years ago

Could you turn on the 'force old status' in the adapter settings ?

#5

Updated by Wesley Ellis over 9 years ago

That seems to have made things better. Just one mux failing now. Status panel also seems correct.

FYI am using the Sony PlayTV Adapter.

Any reason why that mux could be failing, haven't changed anything in the settings for it and it was previously fine?

#6

Updated by Wesley Ellis over 9 years ago

Left it for a 5 mins and now that mux is working but two others aren't, strange...

#7

Updated by Wesley Ellis over 9 years ago

and after another 5 mins or so, its changed which muxes have failed again.

#8

Updated by Rafal Kupiec over 9 years ago

Wesley Ellis wrote:

and after another 5 mins or so, its changed which muxes have failed again.

Same here, on both DVB-T and DVB-S.
Also sometimes it is impossible to switch channel... Kodi says buffering all the time.

#9

Updated by Jaroslav Kysela over 9 years ago

I can do hardly something without logs. Like:

2015-05-12 08:58:41.000 [  TRACE]:mpegts: 482MHz in DVB-T - scan needs more time
2015-05-12 08:58:41.382 [   INFO]:mpegts: 482MHz in DVB-T scan complete
2015-05-12 08:58:41.382 [  DEBUG]:mpegts: 482MHz in DVB-T - 1000 (4096) pmt complete
2015-05-12 08:58:41.382 [  DEBUG]:mpegts: 482MHz in DVB-T - 0900 (2304) pmt complete
2015-05-12 08:58:41.382 [  DEBUG]:mpegts: 482MHz in DVB-T - 1250 (4688) pmt complete
2015-05-12 08:58:41.382 [  DEBUG]:mpegts: 482MHz in DVB-T - 1900 (6400) pmt complete
2015-05-12 08:58:41.382 [  DEBUG]:mpegts: 482MHz in DVB-T - 1A00 (6656) pmt complete
2015-05-12 08:58:41.382 [  DEBUG]:mpegts: 482MHz in DVB-T - 1700 (5888) pmt complete
2015-05-12 08:58:41.382 [  DEBUG]:mpegts: 482MHz in DVB-T - 0500 (1280) pmt complete
2015-05-12 08:58:41.382 [  DEBUG]:mpegts: 482MHz in DVB-T - 1400 (5120) pmt complete
2015-05-12 08:58:41.382 [  DEBUG]:mpegts: 482MHz in DVB-T - 0200 (512) pmt complete
2015-05-12 08:58:41.382 [  DEBUG]:mpegts: 482MHz in DVB-T - 1800 (6144) pmt complete
2015-05-12 08:58:41.382 [  DEBUG]:mpegts: 482MHz in DVB-T - 0011 (17) sdt complete
2015-05-12 08:58:41.382 [  DEBUG]:mpegts: 482MHz in DVB-T - 0001 (1) cat complete
2015-05-12 08:58:41.382 [  DEBUG]:mpegts: 482MHz in DVB-T - 0000 (0) pat complete
#10

Updated by Jaroslav Kysela over 9 years ago

  • Subject changed from Loss of signal stength since latest builds to Mux scan fails sometimes
#11

Updated by Wesley Ellis over 9 years ago

Just done a manual scan on Build: 3.9.2825~gae281c9 and it looks as if the issue maybe resolved. No muxes have failed yet. I will monitor the issue further today.

2015-05-12 11:40:45.489 [   INFO]:mpegts: 682MHz in SD - tuning on DiBcom 7000PC : DVB-T #0
2015-05-12 11:40:45.489 [   INFO]:subscription: 001A: "scan" subscribing to mux "682MHz", weight: 6, adapter: "DiBcom 7000PC : DVB-T #0", network: "SD", service: "Raw PID Subscription" 
2015-05-12 11:40:59.289 [   INFO]:mpegts: 682MHz in SD scan complete
2015-05-12 11:40:59.289 [   INFO]:subscription: 001A: "scan" unsubscribing
2015-05-12 11:40:59.291 [   INFO]:mpegts: 690MHz in SD - tuning on DiBcom 7000PC : DVB-T #0
2015-05-12 11:40:59.291 [   INFO]:subscription: 001C: "scan" subscribing to mux "690MHz", weight: 6, adapter: "DiBcom 7000PC : DVB-T #0", network: "SD", service: "Raw PID Subscription" 
2015-05-12 11:41:12.869 [   INFO]:mpegts: 690MHz in SD scan complete
2015-05-12 11:41:12.870 [   INFO]:subscription: 001C: "scan" unsubscribing
2015-05-12 11:41:12.873 [   INFO]:mpegts: 714MHz in SD - tuning on DiBcom 7000PC : DVB-T #0
2015-05-12 11:41:12.873 [   INFO]:subscription: 001E: "scan" subscribing to mux "714MHz", weight: 6, adapter: "DiBcom 7000PC : DVB-T #0", network: "SD", service: "Raw PID Subscription" 
2015-05-12 11:41:24.981 [   INFO]:mpegts: 714MHz in SD scan complete
2015-05-12 11:41:24.981 [   INFO]:subscription: 001E: "scan" unsubscribing
2015-05-12 11:41:24.983 [   INFO]:mpegts: 722MHz in SD - tuning on DiBcom 7000PC : DVB-T #0
2015-05-12 11:41:24.983 [   INFO]:subscription: 0020: "scan" subscribing to mux "722MHz", weight: 6, adapter: "DiBcom 7000PC : DVB-T #0", network: "SD", service: "Raw PID Subscription" 
2015-05-12 11:41:37.716 [   INFO]:mpegts: 722MHz in SD scan complete
2015-05-12 11:41:37.717 [   INFO]:subscription: 0020: "scan" unsubscribing
2015-05-12 11:41:37.719 [   INFO]:mpegts: 754MHz in SD - tuning on DiBcom 7000PC : DVB-T #0
2015-05-12 11:41:37.719 [   INFO]:subscription: 0022: "scan" subscribing to mux "754MHz", weight: 6, adapter: "DiBcom 7000PC : DVB-T #0", network: "SD", service: "Raw PID Subscription" 
2015-05-12 11:41:51.809 [   INFO]:mpegts: 754MHz in SD scan complete
2015-05-12 11:41:51.809 [   INFO]:subscription: 0022: "scan" unsubscribing
#12

Updated by Wesley Ellis over 9 years ago

are here we are. I have idle scanning turned off at the moment. But I just scanned manually again and some are failing.

2015-05-12 11:46:48.332 [   INFO]:mpegts: 658MHz in SD - tuning on DiBcom 7000PC : DVB-T #1
2015-05-12 11:46:48.332 [   INFO]:subscription: 002C: "scan" subscribing to mux "658MHz", weight: 6, adapter: "DiBcom 7000PC : DVB-T #1", network: "SD", service: "Raw PID Subscription" 
2015-05-12 11:46:48.333 [   INFO]:mpegts: 682MHz in SD - tuning on DiBcom 7000PC : DVB-T #0
2015-05-12 11:46:48.334 [   INFO]:subscription: 002D: "scan" subscribing to mux "682MHz", weight: 6, adapter: "DiBcom 7000PC : DVB-T #0", network: "SD", service: "Raw PID Subscription" 
2015-05-12 11:46:49.636 [WARNING]:linuxdvb: DiBcom 7000PC : DVB-T #0 - poll TIMEOUT
2015-05-12 11:46:53.000 [   INFO]:mpegts: 682MHz in SD - scan no data, failed
2015-05-12 11:46:53.000 [   INFO]:subscription: 002D: "scan" unsubscribing
2015-05-12 11:46:53.003 [   INFO]:mpegts: 690MHz in SD - tuning on DiBcom 7000PC : DVB-T #0
2015-05-12 11:46:53.004 [   INFO]:subscription: 002F: "scan" subscribing to mux "690MHz", weight: 6, adapter: "DiBcom 7000PC : DVB-T #0", network: "SD", service: "Raw PID Subscription" 
2015-05-12 11:46:54.307 [WARNING]:linuxdvb: DiBcom 7000PC : DVB-T #0 - poll TIMEOUT
2015-05-12 11:46:58.000 [   INFO]:mpegts: 690MHz in SD - scan no data, failed
2015-05-12 11:46:58.000 [   INFO]:subscription: 002F: "scan" unsubscribing
2015-05-12 11:46:58.003 [   INFO]:mpegts: 714MHz in SD - tuning on DiBcom 7000PC : DVB-T #0
2015-05-12 11:46:58.003 [   INFO]:subscription: 0031: "scan" subscribing to mux "714MHz", weight: 6, adapter: "DiBcom 7000PC : DVB-T #0", network: "SD", service: "Raw PID Subscription" 
2015-05-12 11:47:01.539 [   INFO]:mpegts: 658MHz in SD scan complete
2015-05-12 11:47:01.539 [   INFO]:subscription: 002C: "scan" unsubscribing
2015-05-12 11:47:01.541 [   INFO]:mpegts: 722MHz in SD - tuning on DiBcom 7000PC : DVB-T #1
2015-05-12 11:47:01.541 [   INFO]:subscription: 0033: "scan" subscribing to mux "722MHz", weight: 6, adapter: "DiBcom 7000PC : DVB-T #1", network: "SD", service: "Raw PID Subscription" 
2015-05-12 11:47:09.989 [   INFO]:mpegts: 714MHz in SD scan complete
2015-05-12 11:47:09.989 [   INFO]:subscription: 0031: "scan" unsubscribing
2015-05-12 11:47:09.992 [   INFO]:mpegts: 754MHz in SD - tuning on DiBcom 7000PC : DVB-T #0
2015-05-12 11:47:09.992 [   INFO]:subscription: 0035: "scan" subscribing to mux "754MHz", weight: 6, adapter: "DiBcom 7000PC : DVB-T #0", network: "SD", service: "Raw PID Subscription" 
2015-05-12 11:47:12.532 [   INFO]:mpegts: 722MHz in SD scan complete
2015-05-12 11:47:12.533 [   INFO]:subscription: 0033: "scan" unsubscribing
2015-05-12 11:47:22.000 [   INFO]:mpegts: 754MHz in SD scan complete
2015-05-12 11:47:22.000 [   INFO]:subscription: 0035: "scan" unsubscribing
#13

Updated by Wesley Ellis over 9 years ago

And scanned again, you can see that the previous muxes that failed now work. and others have failed.

2015-05-12 11:49:43.680 [   INFO]:mpegts: 658MHz in SD - tuning on DiBcom 7000PC : DVB-T #1
2015-05-12 11:49:43.680 [   INFO]:subscription: 0036: "scan" subscribing to mux "658MHz", weight: 6, adapter: "DiBcom 7000PC : DVB-T #1", network: "SD", service: "Raw PID Subscription" 
2015-05-12 11:49:43.680 [   INFO]:mpegts: 682MHz in SD - tuning on DiBcom 7000PC : DVB-T #0
2015-05-12 11:49:43.680 [   INFO]:subscription: 0037: "scan" subscribing to mux "682MHz", weight: 6, adapter: "DiBcom 7000PC : DVB-T #0", network: "SD", service: "Raw PID Subscription" 
2015-05-12 11:49:48.000 [   INFO]:mpegts: 682MHz in SD - scan complete
2015-05-12 11:49:48.000 [   INFO]:subscription: 0037: "scan" unsubscribing
2015-05-12 11:49:48.003 [   INFO]:mpegts: 690MHz in SD - tuning on DiBcom 7000PC : DVB-T #0
2015-05-12 11:49:48.003 [   INFO]:subscription: 0039: "scan" subscribing to mux "690MHz", weight: 6, adapter: "DiBcom 7000PC : DVB-T #0", network: "SD", service: "Raw PID Subscription" 
2015-05-12 11:49:56.541 [   INFO]:mpegts: 658MHz in SD scan complete
2015-05-12 11:49:56.541 [   INFO]:subscription: 0036: "scan" unsubscribing
2015-05-12 11:49:56.543 [   INFO]:mpegts: 714MHz in SD - tuning on DiBcom 7000PC : DVB-T #1
2015-05-12 11:49:56.543 [   INFO]:subscription: 003B: "scan" subscribing to mux "714MHz", weight: 6, adapter: "DiBcom 7000PC : DVB-T #1", network: "SD", service: "Raw PID Subscription" 
2015-05-12 11:49:57.801 [WARNING]:linuxdvb: DiBcom 7000PC : DVB-T #1 - poll TIMEOUT
2015-05-12 11:50:01.000 [   INFO]:mpegts: 714MHz in SD - scan no data, failed
2015-05-12 11:50:01.000 [   INFO]:subscription: 003B: "scan" unsubscribing
2015-05-12 11:50:01.004 [   INFO]:mpegts: 722MHz in SD - tuning on DiBcom 7000PC : DVB-T #1
2015-05-12 11:50:01.005 [   INFO]:subscription: 003D: "scan" subscribing to mux "722MHz", weight: 6, adapter: "DiBcom 7000PC : DVB-T #1", network: "SD", service: "Raw PID Subscription" 
2015-05-12 11:50:02.816 [   INFO]:mpegts: 690MHz in SD scan complete
2015-05-12 11:50:02.816 [   INFO]:subscription: 0039: "scan" unsubscribing
2015-05-12 11:50:02.820 [   INFO]:mpegts: 754MHz in SD - tuning on DiBcom 7000PC : DVB-T #0
2015-05-12 11:50:02.820 [   INFO]:subscription: 003F: "scan" subscribing to mux "754MHz", weight: 6, adapter: "DiBcom 7000PC : DVB-T #0", network: "SD", service: "Raw PID Subscription" 
2015-05-12 11:50:12.495 [   INFO]:mpegts: 722MHz in SD scan complete
2015-05-12 11:50:12.495 [   INFO]:subscription: 003D: "scan" unsubscribing
2015-05-12 11:50:16.958 [   INFO]:mpegts: 754MHz in SD scan complete
2015-05-12 11:50:16.958 [   INFO]:subscription: 003F: "scan" unsubscribing

Let me know if you need anymore info, I can build tvheadend and test new code if needed.

#14

Updated by Wesley Ellis over 9 years ago

I just rescanned only the mux that failed, and it works again now.

2015-05-12 11:51:57.016 [   INFO]:mpegts: 714MHz in SD - tuning on DiBcom 7000PC : DVB-T #1
2015-05-12 11:51:57.016 [   INFO]:subscription: 0040: "scan" subscribing to mux "714MHz", weight: 6, adapter: "DiBcom 7000PC : DVB-T #1", network: "SD", service: "Raw PID Subscription" 
2015-05-12 11:52:09.922 [   INFO]:mpegts: 714MHz in SD scan complete
2015-05-12 11:52:09.923 [   INFO]:subscription: 0040: "scan" unsubscribing
#15

Updated by Jaroslav Kysela over 9 years ago

It looks like the driver fault. Could you upgrade to v3.9-2826-gcd8fe91, enable the "--trace mpegts" and retrigger this issue ?

#16

Updated by Wesley Ellis over 9 years ago

This is how openelec starts tvheadend, so to enable tracing am I right in thinking this is correct? guessing it can't be done from frontend of tvheadend.

1. kill active pid for tvheadend
2. start with:

tvheadend -B -C -u root -g video -c /storage/.kodi/userdata/addon_data/service.multimedia.tvheadend --trace mpegts

#18

Updated by Wesley Ellis over 9 years ago

Ok, took me a while to figure out I needed to compile tvheadend with trace enabled in Openelec :)

Logs are attached and shows the issue first scan some muxes fail, second scan some muxes succeed that had just failed and others fail now.

Let me know if you need more info.

#19

Updated by Wesley Ellis over 9 years ago

I just manually scanned in only the failed muxes this time, I have ok status on all muxes now. Log attached.

#20

Updated by Jaroslav Kysela over 9 years ago

No input data from the driver:

2015-05-13 08:17:21.017 [   INFO]:mpegts: 682MHz in SD - tuning on DiBcom 7000PC : DVB-T #0
2015-05-13 08:17:21.017 [  DEBUG]:mpegts: 682MHz in SD - started
2015-05-13 08:17:22.316 [WARNING]:linuxdvb: DiBcom 7000PC : DVB-T #0 - poll TIMEOUT
2015-05-13 08:17:26.001 [   INFO]:mpegts: 682MHz in SD - scan no data, failed
2015-05-13 08:17:26.001 [   INFO]:subscription: 000C: "scan" unsubscribing

You may try to activate some workarounds like 'Tune Repeats' (try value 1 or 2).

#21

Updated by Jaroslav Kysela over 9 years ago

See that the other input received data correctly:

2015-05-13 08:17:21.599 [  TRACE]:mpegts: input DiBcom 7000PC : DVB-T #1 got 18800 bytes
#22

Updated by Erik R over 9 years ago

Hi,

I can confirm the same problem.
TVHeadend fails to read anything from some MUXes but MythTV and Kaffeine works fine (our most important MUX :( )

I use a DiBcom 700PC device as well but I do not think it is the driver because I can repeat the problem using a Terratec T2 device as well. Both are connected to USB though.

In Kaffeine I can see that the signal strength is only 30%.

#23

Updated by Erik R over 9 years ago

By the way, I have this problem on on stable version 3.4.27 as well as the most recent version that is tagged in GIT.

#24

Updated by Jaroslav Kysela over 9 years ago

There is timeout (5 seconds) - if no data are received in this time windows, tvh takes the input as broken. Anyway, I cannot do anything without logs.

#25

Updated by John Swanson about 9 years ago

Jaroslav Kysela wrote:

There is timeout (5 seconds) - if no data are received in this time windows, tvh takes the input as broken. Anyway, I cannot do anything without logs.

Hi there,

I can confirm the problem, too. I have tried 3.9.XXX, 4.0.3 and 4.0.5-17 from http://sources.openelec.tv/devel/.
All three showed these strange problems with the DiBcom7000PC. Further I cannot watch any Live TV... well once it works it judders and eventually stops playing...
I can remember, that I had no such severe problems with OpenELEC 5.0.8< on my RPi1.
Anyways, as you said Jaroslav you cannot work without logs, so here are some with mpegts traces:
(All stem from TVHeadend 4.0.5-17 builds; not mentioned settings are set to default; if you need further data, pls request)

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