[mythtv-users] DVB MythTV channel scan issue

Kelly Reed Schuerman krschuerman at gmail.com
Fri Jul 3 06:56:25 UTC 2009

On Fri, Jul 3, 2009 at 1:17 AM, <stefan_jones at comcast.net> wrote:

> ----- "Kelly Reed Schuerman" <krschuerman at gmail.com> wrote:
> > From: "Kelly Reed Schuerman" <krschuerman at gmail.com>
> > To: "Discussion about mythtv" <mythtv-users at mythtv.org>
> > Sent: Thursday, July 2, 2009 10:51:24 PM GMT -08:00 US/Canada Pacific
> > Subject: [mythtv-users] DVB MythTV channel scan issue
> >
> > I have a Pinnacle pcHDTV 800i amd I am having trouble finding the
> channels and adding them to MythTV.
> >
> > I have 1 working channel and it looks good.  The problem seems to be with
> the scanner built into mythtv-setup.
> >
> > I see the following in the log scrolling on the screen.
> >
> > Updating 1008-0 as 10080 on QAM-256 Channel 110 (110)
> > Updating 1008-0 as 10080 on QAM-256 Channel 110 (110)
> > Timeout...
> > Skipping...
> > Skipping...
> > Updating 1008-0 as 10080 on QAM-256 Channel 112 (112)
> >
> > It appears that whenever a working channel is found it overwrites the
> previous found channel.  In the end I have 1 working channel.
> >
> > Any ideas?
> Well, there is an "exiting channels" policy, where you can select delete,
> minimal updates, etc. But I don't think that is the problem here.
> What sort of scan are you doing?  What options? Are you specifying a
> seperator (-,_, etcetera)?
> I suggest getting an outside authority to guide your scanning.  Go to this
> site:
> http://www.silicondust.com/hdhomerun/channels_us
> And enter your zip code. It will show, for each of the providers in your
> area, what channels have been found by an HDHR scanner. You should find all
> of those channels.  I found that NOT skipping encoded channels, and
> including audio channels, picks up more usable channels than otherwise.
> If the internal scanner isn't doing it for you, try the technique described
> on this MythTV wiki page:
> http://www.mythtv.org/wiki/Adding_Digital_Cable_Channels_(For_ATSC/QAM_Tuner_Cards_--_USA/Canada)<http://www.mythtv.org/wiki/Adding_Digital_Cable_Channels_%28For_ATSC/QAM_Tuner_Cards_--_USA/Canada%29>
> The end result will be a channels.conf file. You specify channels.conf when
> you do the scan. It does a scan, but matches what it finds with the file.

Here are the scan settings I'm using:
Type: Full Scan
Frequency Table: Cable
Modulation: Cable (QAM-256)
Separator: None
Treatment: Minimal Updates  (It'd be nice for me if there was a "create

It finds several channels, it just gives them all the same channel number
and therefore each channel overwrites the previous.

I've been following that wiki page over and over again.  I find 215 possible
channels and trying to weed through them has been difficult.  My TV only
finds 6 or 7 channels.

Running the mencoder script to automate that process gives me this error:
Failed to open dvb://1.
Cannot open file/device.

I'm running ubuntu 9.04 and this appears to be a well known issue but I
haven't found the solution.

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