[mythtv-users] channels missing in the SF bay area

Marco Nelissen marco.nelissen at gmail.com
Fri Jun 19 22:48:08 UTC 2009

On Fri, Jun 19, 2009 at 11:14 AM, Brad Fuller<bradallenfuller at gmail.com> wrote:
> On Fri, Jun 19, 2009 at 10:49 AM, Tom Dexter <digitalaudiorock at gmail.com>
> wrote:
>> On Thu, Jun 18, 2009 at 10:34 PM, Marco
>> Nelissen<marco.nelissen at gmail.com> wrote:
>> > OK, so a simple rescan fixed this. I had assumed that the
>> > schedulesdirect info would also specify what frequencies the various
>> > channels are on, and that mythtv would pick that up, but apparently
>> > not.
>> >
>> >
>> > On Thu, Jun 18, 2009 at 7:09 PM, Marco
>> > Nelissen<marco.nelissen at gmail.com> wrote:
>> >> I've been using MythTV for OTA ATSC recording for a while now.
>> >> My wife pointed out today that Entertainment Tonight hadn't recorded
>> >> in a while. It seems to have started with the DTV transition: I have a
>> >> recording on June 11, but all subsequent ones are 'empty'. When I try
>> >> to tune the channel (KRON), I get no lock. Several other channels
>> >> (KTVU/FOX and KGO/ABC) are gone too. Other channels like NBC and KQED
>> >> are still there though.
>> >>
>> >> Did the missing channels go off the air, did they move, did
>> >> SchedulesDirect mess up?
>> >> More importantly, how do I get them back?
>> >>
>> I believe schedules direct uses the ATSC channel numbers (the virtual
>> channels like 4.1 etc).  When mythfilldatabase is run, it assigns the
>> xmltvid to the channel table where needed, which it gets from
>> schedules direct (based on the virtual channel number and the market
>> you're in).  Nothing in schedules direct knows anything about actual
>> frequencies of ATSC channels.
>> ATSC frequencies changed in most markets as of the transition, and
>> it's pretty widely advertised that all digital TV tuner devices (not
>> just MythTV) would need to be rescanned at that time.
> yep, you need to rescan. For instance, Channel 7 has moved from UHF band to
> VHF (to the real chan 7 spot)

Really? I'll have to check I still have proper reception of all
channels then, since my antenna is UHF only. Though flipping through
channels yesterday I'm pretty sure I still got channel 7 (assuming you
mean KGO/ABC).

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