Hi all. I dusted off my old AF9015 no-name DVB-T stick (15a4:9016) to check which stations I can receive (dissatisfied with IPTV). Seeing that the package's channel list (provided by Ubuntu 19.10, version 0+git20171226.07b18ec-1) is outdated and/or incomplete, I wanted to either run full channel scan, or just probe the frequencies of the MUXes published by the local (and not-so-local[0]) operators. The LinuxTV wiki only lists w_scan as a utility capable of scanning without existing channel file (edit: shortly after typing up this message, I came across dvbtune, where the wiki page suggests the tool is outdated - is that tool supported or not?) The problem I'm having is very similar to this debian bugreport [1]. As I understand it, w_scan is using NIT data in preference to the actual frequency it used to receive said data. As a result, 1 frequency where another MUX [2] should be broadcast, is skipped in the 1st pass, and the original frequency is lost in the 2nd pass (522 -> 754 MHz), and another MUX (658 -> 834 MHz) is redirected to a long-outdated frequency at the end of the spectrum, where the 2nd pass finds nothing. [3] Score: 1/3 (expected) MUXes found. Is there something that works like manual tuning in VLC, or NextPVR, ie. enter frequency, bandwidth, and see if you get a signal + program listing? (edit: dvbtune can do this apparently, though the format is different from the normal channel list). Or perhaps an option to w_scan to ignore NIT frequency if delta from scanning frequency is > BW? Thanks, MZ [0] <rant> On that note, I find the whole idea of transponder-site-based channel lists weird. By one operator's own maps, the range of a common 100kW tower is >100km, so I'm probably within range of transponders from 3 other countries. Am I expected to cat all applicable channel files from the package, or what?</rant> [1] https://bugs.debian.org/cgi-bin/bugreport.cgi?att=0;bug=788100 [2] I'm referring to what wiki calls "bouquet". [3] Output below: w_scan -ft -c sk w_scan version 20170107 (compiled for DVB API 5.10) using settings for SLOVAKIA DVB aerial DVB-T Europe scan type TERRESTRIAL, channellist 4 output format vdr-2.0 WARNING: could not guess your codepage. Falling back to 'UTF-8' output charset 'UTF-8', use -C <charset> to override Info: using DVB adapter auto detection. /dev/dvb/adapter0/frontend0 -> TERRESTRIAL "Afatech AF9013": good :-) Using TERRESTRIAL frontend (adapter /dev/dvb/adapter0/frontend0) -_-_-_-_ Getting frontend capabilities-_-_-_-_ Using DVB API 5.11 frontend 'Afatech AF9013' supports INVERSION_AUTO QAM_AUTO TRANSMISSION_MODE_AUTO GUARD_INTERVAL_AUTO HIERARCHY_AUTO FEC_AUTO BANDWIDTH_AUTO not supported, trying 6/7/8 MHz. FREQ (174.00MHz ... 862.00MHz) -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_ Scanning DVB-T... Scanning 8MHz frequencies... 474000: (time: 00:00.163) 482000: (time: 00:02.183) 490000: (time: 00:04.199) 498000: (time: 00:06.215) 506000: (time: 00:08.231) 514000: (time: 00:10.247) 522000: (time: 00:12.263) signal ok: QAM_AUTO f = 522000 kHz I999B8C999D999T999G999Y999 (0:0:0) QAM_AUTO f = 522000 kHz I999B8C999D999T999G999Y999 (0:0:0) : updating transport_stream_id: -> (0:0:259) QAM_AUTO f = 522000 kHz I999B8C999D999T999G999Y999 (0:0:259) : updating network_id -> (0:12290:259) updating transponder: (QAM_AUTO f = 522000 kHz I999B8C999D999T999G999Y999 (0:12290:259)) 0x0000 to (QAM_64 f = 754000 kHz I999B8C23D0T8G4Y0 (8895:12290:259)) 0x405A 530000: (time: 00:22.119) 538000: (time: 00:24.135) 546000: (time: 00:28.691) 554000: (time: 00:30.727) 562000: (time: 00:32.743) 570000: (time: 00:34.759) 578000: (time: 00:36.775) 586000: (time: 00:38.791) 594000: (time: 00:40.807) 602000: (time: 00:42.823) 610000: (time: 00:44.839) 618000: (time: 00:46.855) 626000: (time: 00:48.871) 634000: (time: 00:53.379) 642000: (time: 00:55.399) 650000: (time: 00:57.415) 658000: (time: 00:59.431) signal ok: QAM_AUTO f = 658000 kHz I999B8C999D999T999G999Y999 (0:0:0) QAM_AUTO f = 658000 kHz I999B8C999D999T999G999Y999 (0:0:0) : updating transport_stream_id: -> (0:0:257) QAM_AUTO f = 658000 kHz I999B8C999D999T999G999Y999 (0:0:257) : updating network_id -> (0:12544:257) updating transponder: (QAM_AUTO f = 658000 kHz I999B8C999D999T999G999Y999 (0:12544:257)) 0x0000 to (QAM_64 f = 834000 kHz I999B8C23D0T8G4Y0 (8895:12544:257)) 0x405A 666000: (time: 01:00.127) 674000: (time: 01:02.151) 682000: (time: 01:04.167) 690000: (time: 01:06.183) 698000: (time: 01:08.199) 706000: (time: 01:10.215) 714000: (time: 01:12.231) 722000: (time: 01:14.247) 730000: (time: 01:16.263) 738000: (time: 01:18.279) 746000: (time: 01:20.295) 754000: skipped (already known transponder) 762000: (time: 01:22.311) 770000: (time: 01:24.327) 778000: (time: 01:26.343) 786000: (time: 01:28.359) 794000: (time: 01:30.375) 802000: (time: 01:32.391) 810000: (time: 01:34.407) 818000: (time: 01:36.423) 826000: (time: 01:38.439) 834000: skipped (already known transponder) 842000: (time: 01:40.455) 850000: (time: 01:42.471) 858000: (time: 01:44.487) tune to: QAM_64 f = 754000 kHz I999B8C23D0T8G4Y0 (8895:12290:259) (time: 01:46.503) QAM_64 f = 754000 kHz I999B8C23D0T8G4Y0 (8895:12290:259) : updating transport_stream_id: -> (8895:12290:258) service = TV JOJ (Towercom) service = JOJ Plus (Towercom) service = Prima Plus Promo (Towercom) service = WAU (Towercom) service = TA3 (Towercom) service = otta - interaktivna sluzba (Towercom) QAM_64 f = 754000 kHz I999B8C23D0T8G4Y0 (8895:12290:258) : updating network_id -> (8895:12289:258) tune to: QAM_64 f = 834000 kHz I999B8C23D0T8G4Y0 (8895:12544:257) (time: 02:00.703) ----------no signal---------- tune to: QAM_AUTO f = 834000 kHz I999B8C999D0T999G999Y0 (8895:12544:257) (time: 02:06.747) (no signal) ----------no signal---------- (time: 02:12.791) dumping lists (5 services) .. TV JOJ;Towercom:754000:B8C23D0G4M64T8Y0:T:27500:2102=2:2111=slo@3,2134=mul:2130:0:2001:8895:258:0 JOJ Plus;Towercom:754000:B8C23D0G4M64T8Y0:T:27500:2202=2:2211=slo@3,2234=mul:2230:0:2002:8895:258:0 Prima Plus Promo;Towercom:754000:B8C23D0G4M64T8Y0:T:27500:2302=27:2311=slo@17:0:0:2003:8895:258:0 WAU;Towercom:754000:B8C23D0G4M64T8Y0:T:27500:2402=2:2411=slo@3,2434=qaa:2431:0:2004:8895:258:0 TA3;Towercom:754000:B8C23D0G4M64T8Y0:T:27500:2502=2:2511=slo@3:0:0:2005:8895:258:0 Done, scan time: 02:12.791
