[mythtv-users] Dual NTSC/ATSC Setup
jcw at wilsonet.com
Thu Jun 3 00:47:22 EDT 2004
On Jun 2, 2004, at 21:13, David A. Greene wrote:
> Jarod Wilson wrote:
>> Yes, there is a global mode, but there are also per-card overrides.
> I think you mean per-channel, right? When I went into the channel
> editor I could choose NTSC or ATSC.
Whoops, yes. Like I said, my memory is hazy. ;-)
>>> What do I choose for this setting?
>> In the setup util (where you define inputs, guide data sources, etc.).
>>> I assume adding an HDTV
>>> video source and connecting that to the pcHDTV is sufficient
>>> to tell Myth which card to use for what.
>> Double-check that the global mode is being overridden for the pcHDTV
> Again, for channels? I set the pcHDTV card to the pcHDTV card
> type in the capture cards setting.
I believe that's correct.
> What do I specify as an audio source? Doesn't the MPEG already
> contain the audio?
You shouldn't have to spec anything for audio source, but if you have
issues, I seem to recall some of them being resolved by simply setting
the audio source to /dev/dsp (which in my case, is a symlink to
/dev/dsp0). The MPEG does indeed already contain the audio though.
>>> Now of course I
>>> don't know how to go about specifying an over-the-air HDTV
>>> source as my video sources list doesn't seem to include
>>> anything like that.
>> You basically pull down the corresponding non-HDTV guide data, then
>> edit the frequency tables. At least that used to be what you had to
>> do, I haven't played with my pcHDTV card in ages...
> Ok, by "edit the frequency" you mean freqid, right?
> From other
> responses, I gather that I have to edit the channel number
> (channum?) to not conflict with other channels (200+ in my
> case to make things easy) and also edit the frequency (freqid?)
> to correspond to some (?) HDTV frequency.
I only had my pcHDTV card in my box, so I set the channel numbers to
the same as their NTSC counterparts and just edited the freqid.
> Which frequency do I use, the "official" HDTV frequency or
> the remapped numbers. For example, one of the PBS stations
> here is at HDTV channel 34 but is remapped to 2.1 to
> correspond to the NTSC channel 2 from the same station.
> What do I enter for the freqid? 34?
I *think* so...
> What about subchannels?
> The other PBS station has five of them (17.1-17.5 all under
> HDTV channel 16 -- the NTSC channel is at 17).
Check out antennaweb.org, it should give you all the freqids you need,
I believe. I vaguely recall creating different channels for each of the
PBS sub-channels in my area, and then assigning one sub-channel to
each's freqid. Check out this, if you haven't already:
> Right now whenever I press "y" in myth it locks up and
> reports a 0% signal. I set the HDTV video source to
> start on channel 34 (the PBS HDTV station). How do I
> get the HDTV channels to show up in browse/scan mode?
> They show up in the guide but not in the full-screen
> live tv browse mode. I also can't flip channels
> down from 2 (the lowest) to get to 215 (the highest).
> Is having a gap in channel numbers a bad thing? Right
> now the cable stops at 125 and HDTV starts at channum
Hm... I *think* you want a channel with freqid 34 to get the PBS
station, but again, not sure...
> With dtvsignal channel 34 looks very strong. Some of
> the others are at zero, but that's more a function of
> my antenna. I need to get a better one, apparently. :(
Yeah, I spent over $400 putting mine up, and have hardly had the time
to do anything with it...
> Thanks for your help!
Glad you think my bumbling is helpful. ;-)
Jarod C. Wilson, RHCE
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