[linux-dvb] SNR value does not change at all; solved tzap: error while parsing constellation (syntax error)

lynx.abraxas at freenet.de lynx.abraxas at freenet.de
Sun Jan 28 18:06:53 CET 2007


On 22/01/07 19:51:18, lynx.abraxas at freenet.de wrote:
> On 21/01/07 00:08:09, Nico Sabbi wrote:
> > >
> > >Also mplayer can display the video but without sound. If I let mencoder 
> > >encode it there is sound:
> > >
> > >
> > 
> > try with a larget -tsprobe.
> > What's in your ~/.mplayer/config and ~/.mplayer/mencoder* ?
> 
> Thanks for the hint. My ~/.mplayer/config and ~/.mplayer/mencoder* were OK but
> I remembered to have a /etc/mplayer/config which  had  alang=en  in  it.  That
> trying to get English audio failed on German DVB-T. So that's fixed now.
> 
> But how can I get tzap to work? I stil get:
> 
> tzap 3sat
> using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
> ERROR: error while parsing constellation (syntax error)
> 
> cat .tzap/channels.conf
> Das Erste:191500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_AUTO:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_AUTO:513:514:32
> arte:191500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_AUTO:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_AUTO:33:34:2
> Phoenix:191500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_AUTO:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_AUTO:49:50:3
> EinsPlus:191500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_AUTO:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_AUTO:97:98:6
> Bayerisches FS:530000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_AUTO:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_AUTO:545:546:34
> BR-alpha:530000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_AUTO:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_AUTO:561:562:35
> BR DVB-H INT:530000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_AUTO:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_AUTO:0:0:49
> BR DVB-H Services :530000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_AUTO:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_AUTO:0:0:50
> SWR Fernsehen:530000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_AUTO:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_AUTO:3601:3602:225
> ZDF:730000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_AUTO:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_AUTO:545:546:514
> 3sat:730000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_AUTO:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_AUTO:561:562:515
> Doku/KiKa:730000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_AUTO:FEC_AUTO:QAM_AUTO:TRANSMISSION_MODE_AUTO:GUARD_INTERVAL_AUTO:HIERARCHY_AUTO:593:594:517

OK,  got  it. dvbscan is very dependent on the initial_tuning_data.txt. w_scan
produced one with lots of AUTO-mode which tzap seems not  be  able  to  parse.
Create_Scanning_Table  from  http://www.johannes-bauer.com/dvbt/ does it quite
statically but then it works. 
Sadly even when tuned to a channel I have an snr of 0 although it seems the device supports it (SNR: 1). Is the driver not complete yet? Does it make sense to use the signal value for adjusting the arial?
Here is what I have now:

cat Scanlist.txt
# Scanning list was created by Create_Scanning_Table by Johannes Bauer
T 000 7MHz 2/3 NONE QAM16 8k 1/4 NONE
T 000 7MHz 3/4 NONE QAM16 8k 1/4 NONE
T 000 8MHz 2/3 NONE QAM16 8k 1/4 NONE
T 000 8MHz 3/4 NONE QAM16 8k 1/4 NONE
T 000 7MHz 2/3 NONE QAM16 8k 1/4 NONE
T 000 7MHz 3/4 NONE QAM16 8k 1/4 NONE
T 000 8MHz 2/3 NONE QAM16 8k 1/4 NONE
T 000 8MHz 3/4 NONE QAM16 8k 1/4 NONE
T 000 7MHz 2/3 NONE QAM16 8k 1/4 NONE
T 000 7MHz 3/4 NONE QAM16 8k 1/4 NONE
T 000 8MHz 2/3 NONE QAM16 8k 1/4 NONE
T 000 8MHz 3/4 NONE QAM16 8k 1/4 NONE

dvbscan Scanlist.txt >| ~/.tzap/channels.conf

cat .tzap/channels.conf
Das Erste:191500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_3_4:FEC_AUTO:QAM_16:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_4:HIERARCHY_NONE:513:514:32
arte:191500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_3_4:FEC_AUTO:QAM_16:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_4:HIERARCHY_NONE:33:34:2
Phoenix:191500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_3_4:FEC_AUTO:QAM_16:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_4:HIERARCHY_NONE:49:50:3
EinsPlus:191500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_3_4:FEC_AUTO:QAM_16:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_4:HIERARCHY_NONE:97:98:6
Bayerisches FS:530000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_AUTO:QAM_16:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_4:HIERARCHY_NONE:545:546:34
BR-alpha:530000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_AUTO:QAM_16:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_4:HIERARCHY_NONE:561:562:35
BR DVB-H INT:530000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_AUTO:QAM_16:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_4:HIERARCHY_NONE:0:0:49
BR DVB-H Services :530000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_AUTO:QAM_16:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_4:HIERARCHY_NONE:0:0:50
SWR Fernsehen:530000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_AUTO:QAM_16:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_4:HIERARCHY_NONE:3601:3602:225
ZDF:730000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_AUTO:QAM_16:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_4:HIERARCHY_NONE:545:546:514
3sat:730000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_AUTO:QAM_16:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_4:HIERARCHY_NONE:561:562:515
Doku/KiKa:730000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_AUTO:QAM_16:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_4:HIERARCHY_NONE:593:594:517

tzap arte
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
reading channels from file '/root/.tzap/channels.conf'
tuning to 191500000 Hz
video pid 0x0021, audio pid 0x0022
status 1f | signal 550e | snr 0000 | ber 001fffff | unc 00000000 | FE_HAS_LOCK
status 1f | signal 5676 | snr 0000 | ber 0000b4a0 | unc 00000012 | FE_HAS_LOCK
status 1f | signal 5731 | snr 0000 | ber 0000b340 | unc 00000000 | FE_HAS_LOCK
status 1f | signal 57bb | snr 0000 | ber 000041a0 | unc 00000000 | FE_HAS_LOCK
status 1f | signal 5912 | snr 0000 | ber 00003540 | unc 00000000 | FE_HAS_LOCK

dvbsnoop -s signal -pd 9 -n 10 -timeout 100
dvbsnoop V1.4.00 -- http://dvbsnoop.sourceforge.net/
   DEMUX : /dev/dvb/adapter0/demux0
   DVR   : /dev/dvb/adapter0/dvr0
   FRONTEND: /dev/dvb/adapter0/frontend0

---------------------------------------------------------
Transponder/Frequency signal strength statistics...
max cycle count: 10
Capabilities: BER: 1  SNR: 1  SIG: 1  STAT: 1  UBLK: 1
---------------------------------------------------------
cycle: 1  d_time: 0.001 s  Sig: 22942  SNR: 0  BER: 20656  UBLK: 0  Stat: 0x1f [SIG CARR VIT SYNC LOCK ]
cycle: 2  d_time: 0.113 s  Sig: 22928  SNR: 0  BER: 17904  UBLK: 0  Stat: 0x1f [SIG CARR VIT SYNC LOCK ]
cycle: 3  d_time: 0.116 s  Sig: 22935  SNR: 0  BER: 17904  UBLK: 0  Stat: 0x1f [SIG CARR VIT SYNC LOCK ]
cycle: 4  d_time: 0.112 s  Sig: 22937  SNR: 0  BER: 17904  UBLK: 0  Stat: 0x1f [SIG CARR VIT SYNC LOCK ]
cycle: 5  d_time: 0.112 s  Sig: 22944  SNR: 0  BER: 17904  UBLK: 0  Stat: 0x1f [SIG CARR VIT SYNC LOCK ]
cycle: 6  d_time: 0.112 s  Sig: 22949  SNR: 0  BER: 16976  UBLK: 0  Stat: 0x1f [SIG CARR VIT SYNC LOCK ]
cycle: 7  d_time: 0.112 s  Sig: 22944  SNR: 0  BER: 16976  UBLK: 0  Stat: 0x1f [SIG CARR VIT SYNC LOCK ]
cycle: 8  d_time: 0.112 s  Sig: 22927  SNR: 0  BER: 16976  UBLK: 0  Stat: 0x1f [SIG CARR VIT SYNC LOCK ]
cycle: 9  d_time: 0.112 s  Sig: 22930  SNR: 0  BER: 16976  UBLK: 0  Stat: 0x1f [SIG CARR VIT SYNC LOCK ]
cycle: 10  d_time: 0.112 s  Sig: 22947  SNR: 0  BER: 23152  UBLK: 0  Stat: 0x1f [SIG CARR VIT SYNC LOCK ]


Lynx



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