id summary reporter owner description type status priority milestone component version severity resolution keywords cc mlocked 8731 DVB-T scan: muxes not tuned during full scan but tuned using NIT info Nick Morrott Stuart Auchterlonie "Using the same configuration as reported in #8726. Scan details: full UK scan using Sutton Coldfield transmitter with 6 available muxes. Signal/tuning timeouts raised to 2000/6000ms. ALL services (DVB+MPEG) scanned, with decryption testing disabled. During the scan, a signal and successful lock is achieved on only 1 of the possible muxes (746000000), even when using doubled timeouts. The remaining 5 muxes are discovered in the NIT of this mux, and subsequent tuning of these muxes is successful. Checking the log output reveals the following for sample mux 634166670: i) During the initial full scan using default scan parameters, the following was seen: {{{ DVBChan(1:/dev/dvb/adapter102/frontend0): New Params: 634166670 auto 0 auto auto 8 a 1/32 n v fec: auto msys: UNDEFINED rolloff: 0.35 2010-08-05 06:42:04.455 DVBChan(1:/dev/dvb/adapter102/frontend0): Tune(): Frequency tuning successful. 2010-08-05 06:42:04.455 DTVSM(/dev/dvb/adapter102/frontend0)::SetChannel(-1, -1): 2010-08-05 06:42:04.455 SM(/dev/dvb/adapter102/frontend0)::Start: begin 2010-08-05 06:42:04.455 SM(/dev/dvb/adapter102/frontend0)::Start: end 2010-08-05 06:42:04.504 SM(/dev/dvb/adapter102/frontend0)::AddFlags: Seen() Match() Wait(Sig,) 2010-08-05 06:42:04.504 SM(/dev/dvb/adapter102/frontend0)::RemoveFlags: Seen() Match() Wait(Pos,) 2010-08-05 06:42:04.566 SM(/dev/dvb/adapter102/frontend0)::AddFlags: Seen() Match() Wait(Sig,) 2010-08-05 06:42:04.628 SM(/dev/dvb/adapter102/frontend0)::AddFlags: Seen() Match() Wait(Sig,) 2010-08-05 06:42:04.690 SM(/dev/dvb/adapter102/frontend0)::AddFlags: Seen() Match() Wait(Sig,) 2010-08-05 06:42:04.752 SM(/dev/dvb/adapter102/frontend0)::AddFlags: Seen() Match() Wait(Sig,) 2010-08-05 06:42:04.814 SM(/dev/dvb/adapter102/frontend0)::AddFlags: Seen() Match() Wait(Sig,) 2010-08-05 06:42:04.876 SM(/dev/dvb/adapter102/frontend0)::AddFlags: Seen() Match() Wait(Sig,) 2010-08-05 06:42:04.937 SM(/dev/dvb/adapter102/frontend0)::AddFlags: Seen() Match() Wait(Sig,) 2010-08-05 06:42:05.893 SM(/dev/dvb/adapter102/frontend0)::AddFlags: Seen() Match() Wait(Sig,) 2010-08-05 06:42:05.955 SM(/dev/dvb/adapter102/frontend0)::AddFlags: Seen() Match() Wait(Sig,) 2010-08-05 06:42:06.017 SM(/dev/dvb/adapter102/frontend0)::AddFlags: Seen() Match() Wait(Sig,) 2010-08-05 06:42:06.079 SM(/dev/dvb/adapter102/frontend0)::AddFlags: Seen() Match() Wait(Sig,) 2010-08-05 06:42:06.141 SM(/dev/dvb/adapter102/frontend0)::AddFlags: Seen() Match() Wait(Sig,) 2010-08-05 06:42:06.203 SM(/dev/dvb/adapter102/frontend0)::AddFlags: Seen() Match() Wait(Sig,) 2010-08-05 06:42:06.264 SM(/dev/dvb/adapter102/frontend0)::AddFlags: Seen() Match() Wait(Sig,) 2010-08-05 06:42:06.326 SM(/dev/dvb/adapter102/frontend0)::AddFlags: Seen() Match() Wait(Sig,) 2010-08-05 06:42:06.388 SM(/dev/dvb/adapter102/frontend0)::AddFlags: Seen() Match() Wait(Sig,) 2010-08-05 06:42:06.449 SM(/dev/dvb/adapter102/frontend0)::AddFlags: Seen() Match() Wait(Sig,) }}} No signal is seen within the 2000ms timeout value ii) Having extracted this sample mux's details from the NIT of the 1 mux locked to (746000000), the later ""fill-in"" scan was succesful: {{{ DVBChan(1:/dev/dvb/adapter102/frontend0): New Params: 634166670 qam_16 a 3/4 3/4 8 2 1/32 n v fec: auto msys: UNDEFINED rolloff: 0.35 2010-08-05 06:45:51.455 DVBChan(1:/dev/dvb/adapter102/frontend0): Tune(): Tuning to 634166670Hz 2010-08-05 06:45:52.356 dvbchannel.cpp:wait_for_backend: Status: 2010-08-05 06:45:52.356 DVBChan(1:/dev/dvb/adapter102/frontend0): Tune(): Frequency tuning successful. 2010-08-05 06:45:52.356 DTVSM(/dev/dvb/adapter102/frontend0)::SetChannel(-1, -1): 2010-08-05 06:45:52.356 SM(/dev/dvb/adapter102/frontend0)::Start: begin 2010-08-05 06:45:52.356 SM(/dev/dvb/adapter102/frontend0)::AddFlags: Seen() Match() Wait(Sig,) 2010-08-05 06:45:52.356 SM(/dev/dvb/adapter102/frontend0)::Start: end 2010-08-05 06:45:52.356 SM(/dev/dvb/adapter102/frontend0)::RemoveFlags: Seen() Match() Wait(Pos,) 2010-08-05 06:45:52.420 SM(/dev/dvb/adapter102/frontend0)::AddFlags: Seen() Match() Wait(Sig,) 2010-08-05 06:45:52.481 SM(/dev/dvb/adapter102/frontend0)::AddFlags: Seen() Match() Wait(Sig,) 2010-08-05 06:45:52.510 DVBSM(/dev/dvb/adapter102/frontend0): UpdateValues -- Signal Locked 2010-08-05 06:45:52.540 SM(/dev/dvb/adapter102/frontend0)::AddFlags: Seen(PAT,) Match() Wait() 2010-08-05 06:45:52.540 ChannelScanSM(/dev/dvb/adapter102/frontend0): Got a Program Association Table for TransportID 4101 }}} Is it possible to modify the default scan parameters in order to increase the likelihood of finding more/all muxes during the initial scan? Full log output of the scan is attached." Bug Report - General closed minor unknown MythTV - Channel Scanner Master Head medium Abandoned dvb-t missing multiplexes full scan 0