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Clear QAM on Fedora Core 5
PostPosted: Mon Sep 18, 2006 8:29 pm Reply with quote
dlcrow
 
Joined: 18 Sep 2006
Posts: 2




I have the following configuration:

Pentium 4 2.80Ghz HT
Fedora Core 5 w/ 2.6.17-1.2187_FC5smp
v4l-dvb patch from the downloads page (http://www.pchdtv.com/downloads/v4l-dvb-FC5.tar.gz)

HD5500 config from lspci:

Code:
02:01.0 Multimedia video controller: Conexant CX23880/1/2/3 PCI Video and Audio Decoder (rev 05)
02:01.1 Multimedia controller: Conexant CX23880/1/2/3 PCI Video and Audio Decoder [Audio Port] (rev 05)
02:01.2 Multimedia controller: Conexant CX23880/1/2/3 PCI Video and Audio Decoder [MPEG Port] (rev 05)
02:01.4 Multimedia controller: Conexant CX23880/1/2/3 PCI Video and Audio Decoder [IR Port] (rev 05)


Boot output from syslog:

Code:
Sep 18 21:43:24 waterloo kernel: Linux video capture interface: v2.00
Sep 18 21:43:24 waterloo kernel: cx2388x alsa driver version 0.0.6 loaded
Sep 18 21:43:24 waterloo kernel: ACPI: PCI Interrupt 0000:02:01.1[A] -> GSI 22 (level, low) -> IRQ 225
Sep 18 21:43:24 waterloo kernel: CORE cx88[0]: subsystem: 7063:5500, board: pcHDTV HD5500 HDTV [card=47,autodetected]
Sep 18 21:43:24 waterloo kernel: TV tuner 64 at 0x1fe, Radio tuner -1 at 0x1fe
Sep 18 21:43:24 waterloo kernel: cx2388x v4l2 driver version 0.0.6 loaded
Sep 18 21:43:24 waterloo kernel: cx88[0]/1: CX88x/0: ALSA support for cx2388x boards
Sep 18 21:43:24 waterloo kernel: ACPI: PCI Interrupt 0000:02:01.0[A] -> GSI 22 (level, low) -> IRQ 225
Sep 18 21:43:24 waterloo kernel: cx88[0]/0: found at 0000:02:01.0, rev: 5, irq: 225, latency: 64, mmio: 0xf9000000
Sep 18 21:43:24 waterloo kernel: tuner 1-0043: chip found @ 0x86 (cx88[0])
Sep 18 21:43:24 waterloo kernel: tda9887 1-0043: tda988[5/6/7] found @ 0x43 (tuner)
Sep 18 21:43:24 waterloo kernel: tuner 1-0061: chip found @ 0xc2 (cx88[0])
Sep 18 21:43:24 waterloo kernel: tuner 1-0061: type set to 64 (LG TDVS-H06xF)
Sep 18 21:43:24 waterloo kernel: cx88[0]/0: registered device video0 [v4l2]
Sep 18 21:43:24 waterloo kernel: cx88[0]/0: registered device vbi0
Sep 18 21:43:24 waterloo kernel: cx2388x blackbird driver version 0.0.6 loaded
Sep 18 21:43:24 waterloo kernel: cx2388x dvb driver version 0.0.6 loaded
Sep 18 21:43:24 waterloo kernel: ACPI: PCI Interrupt 0000:02:01.2[A] -> GSI 22 (level, low) -> IRQ 225
Sep 18 21:43:24 waterloo kernel: cx88[0]/2: found at 0000:02:01.2, rev: 5, irq: 225, latency: 64, mmio: 0xfb000000
Sep 18 21:43:24 waterloo kernel: cx88[0]/2: cx2388x based dvb card
Sep 18 21:43:24 waterloo kernel: DVB: registering new adapter (cx88[0]).
Sep 18 21:43:24 waterloo kernel: DVB: registering frontend 0 (LG Electronics LGDT3303 VSB/QAM Frontend)...


I can use tvtime to view NTSC perfectly.

I currently have Austin Time Warner Cable connected and am hoping to be able to view clear QAM stations.

I think that dtvscan (from the dvb-atsc-tools-1.0.4 package) finds stations, but it cannot seem to get the channel info. It generates the following output

Code:
      :      :51.1 :51: 2:1
      :      :79.1 :79: 2:1
      :      :81.1 :81: 2:1
      :      :82.1 :82: 2:1
      :      :83.1 :83: 2:1
      :      :84.1 :84: 2:1
      :      :85.1 :85: 2:1
      :      :86.1 :86: 2:1
      :      :87.1 :87: 2:1
      :      :88.1 :88: 2:1
      :      :89.1 :89: 2:1
      :      :90.1 :90: 2:1
      :      :91.1 :91: 2:1
      :      :92.1 :92: 2:1
      :      :93.1 :93: 2:1
      :      :94.1 :94: 2:1
      :      :100.1 :100: 2:1
      :      :101.1 :101: 2:1
      :      :102.1 :102: 2:1
      :      :103.1 :103: 2:1
      :      :104.1 :104: 2:1
      :      :105.1 :105: 2:1
      :      :106.1 :106: 2:1
      :      :107.1 :107: 2:1
      :      :108.1 :108: 2:1
      :      :109.1 :109: 2:1
      :      :110.1 :110: 2:1
      :      :111.1 :111: 2:1
      :      :112.1 :112: 2:1
      :      :113.1 :113: 2:1
      :      :114.1 :114: 2:1
      :      :115.1 :115: 2:1
      :      :116.1 :116: 2:1


Just showing the stdout and stderr for the first channel:

Code:
$ dtvscan -q -c94:94
dtvscan ver 1.0.4 - by Jack Kelliher (c) 2002,2005,2006
Attempting to open /dev/dtv
Opened FE:/dev/dvb/adapter0/frontend0 3
Opened DMX:/dev/dvb/adapter0/demux0 4
Opened DVR:/dev/dvb/adapter0/dvr0 5
channel = 94 QAM_256
Signal: 390
look for sync
PAT found ckets
PAT found ckets
PAT found ckets
PAT found ckets
PAT found ckets
PAT found ckets
PAT found ckets
PAT found ckets
PAT found ckets
PAT found ckets
PAT found ckets
PAT found ckets
PAT found ckets
Unable to recieve valid packets
did find pat
`ERROR vct item ptr null couldn't get channel info
      :      :94.1 :94: 2:1


I am trying to use xine and it fails with the following lines in the BUG-REPORT.TXT file

Code:
input_dvb: continuing in get_instance
xine: found input plugin  : DVB (Digital TV) input plugin
input_dvb: Frontend is <LG Electronics LGDT3303 VSB/QAM Frontend> US Card
input_dvb: Card has no hardware decoder
input_dvb: expecting 33 channels...
input_dvb: found 33 channels...
input_dvb: invalid channel specification, defaulting to last viewed channel.
input_dvb: tuner_set_channel failed
xine: input plugin cannot open MRL [dvb://]


I tried both both the xine-hd-0.8 from http://www.pchdtv.com/downloads/xine-hd-0.8.tar.gz and xine from fedora-extras: (xine-lib-1.1.2-1.fc5 and xine-0.99.4-5.fc5).

I don't know where to go from here to be able to view QAM content. Any suggestions?
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PostPosted: Tue Sep 19, 2006 9:23 pm Reply with quote
pcHDTV_tech
 
Joined: 16 Dec 2004
Posts: 295




Did you use the -fx option to dtvscan which puts the output into Xine format? Someone else commented in another forum that their Cable Co. hid the channel information so they had to dig out what PIDS had channels on them once they found a station that could tune them.

Rusty
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PostPosted: Wed Sep 20, 2006 6:25 am Reply with quote
dlcrow
 
Joined: 18 Sep 2006
Posts: 2




I see no difference in the output from using the -fx or -fm options to dtvscan:

Code:
$ dtvscan -q -fm -c 94:94 2> /dev/null
      :      :94.1 :94: 2:1
$ dtvscan -q -fx -c 94:94 2> /dev/null
      :      :94.1 :94: 2:1


I know the frequency (can get it from the cable box diagnostic screens) and know the channels (see http://www.austin.tx.us/hdtv/), but don't know how to create the appropriate lines in channels.conf. Any pointers?
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PostPosted: Wed Sep 20, 2006 6:47 pm Reply with quote
xyzzy
 
Joined: 12 Feb 2006
Posts: 225




Try my atscscan program. I think xine uses the same format as azap. Try atscscan 80 100. If it looks like some channels are found, you can use the -a switch to get channels.conf output.

That link you posted says your the TWC clear QAM channels are on 82 and 83, but you are scanning channel 94. Maybe that is your problem? The frequency from the cable box diagnostic screen should tell you for sure.
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PostPosted: Thu Sep 21, 2006 9:37 pm Reply with quote
pcHDTV_tech
 
Joined: 16 Dec 2004
Posts: 295




You should have something like:
Code:
KTBC-DT:579000000:QAM_256:0x11:0x14:0x1
KVUE-DT:573000000:QAM_256:0x11:0x14:0x1
KEYE-DT:573000000:QAM_256:0x21:0x24:0x2
KLRU-HD:579000000:QAM_256:0x21:0x24:0x2
KLRU-DT:579000000:QAM_256:0x31:0x34:0x3
KXAN-DT:585000000:QAM_256:0x31:0x34:0x3


The numbers at the very end may not be 100% correct but they are good starting guesses. Try putting that into a channels.conf and see if xine can tune in anything.

HTH,

Rusty
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PostPosted: Fri Sep 22, 2006 7:54 am Reply with quote
nybbler
 
Joined: 06 Jul 2006
Posts: 125




Using comcast? If so, that's as good as you'll get. They strip the channel and program info.
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Clear QAM on Fedora Core 5
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