[mythtv-users] PVR-250 + pcHDTV, myth 0.16, initial setup problem bttv called with NTSC videomode

[glen martin]

Thanks for the help.  This does in fact get me farther,
but I wouldn't say all is good at this stage.

I use dtvsignal to set to a local HD station, then
start mythbackend.  Mythfrontend now connects and
displays a picture.

however:
1) attempting to change channel to a NTSC station
  doesn't work.  The backend logs the following
  and returns to the previous station.

Channel:SetFormat: v4l2 fmt = |NTSC| videomode = 3000
2004-10-31 13:51:57 Maximum signal strength detected: 13% after 5500
msec wait
Channel:SetFormat: v4l2 fmt = |ATSC| videomode = 1000000
2004-10-31 13:51:59 Maximum signal strength detected: 67% after 1500
msec wait
Channel:SetFormat: v4l2 fmt = |NTSC| videomode = 3000

   Myth shouldn't care about the signal strength of NTSC .. indeed, it
   isn't measurable. So it still seems as if there is some confusion
   about which card (and therefore driver) to use when.

2) Recording from HDTV seems to switch to an impossible channel
   (1006!), not the channel deisred.

> Starting up as the master server.
> Channel:SetFormat: v4l2 fmt = |NTSC| videomode = 3000
> SwitchToInput: newcapchannel 4 videomode = 3000
> SwitchToInput: newcapchannel 4 videomode = 3000
> Channel:SetFormat: v4l2 fmt = |NTSC| videomode = 3000
> SwitchToInput: newcapchannel 0 videomode = 3000
> SwitchToInput: newcapchannel 0 videomode = 3000
> VIDIOC_S_STD: Invalid argument
> Channel:SetFormat: v4l2 fmt = |ATSC| videomode = 1000000
> 2004-10-31 13:57:41 Maximum signal strength detected: 69% after 0 msec wait
> 2004-10-31 13:57:41 mythbackend version: 0.16.20040906-1 www.mythtv.org
> 2004-10-31 13:57:41 Enabled verbose msgs : important general
> 2004-10-31 13:57:43 Found changes in the todo list.
> 2004-10-31 13:57:43 Scheduled 1 items in 0.055427 seconds.
> 2004-10-31 13:57:43 Recording starts soon, AUTO-Startup assumed
> 2004-10-31 13:57:43 Started recording "Raiders Football" on channel: 1006 on cardid: 2, sourceid 1
> SwitchToInput: newcapchannel 0 videomode = 1000000
> SwitchToInput: newcapchannel 0 videomode = 1000000
> Channel:SetFormat: v4l2 fmt = |NTSC| videomode = 3000
> 2004-10-31 13:57:46 Maximum signal strength detected: 13% after 5500 msec wait
> 2004-10-31 13:57:46 Changing from None to RecordingOnly
> 2004-10-31 13:57:52 Maximum signal strength detected: 13% after 5500 msec wait
> 2004-10-31 13:57:52 Signal level too low?
> 2004-10-31 13:57:52 Tuning Error -- aborting recording
> 2004-10-31 13:57:52 Finished recording Raiders Football on channel: 1006


glen


On Sun, 2004-10-31 at 11:30 -0800, Wendy Seltzer wrote:
> At 11:16 AM 10/31/2004 -0800, glen martin wrote:
> >2004-10-31 10:16:31 Maximum signal strength detected: 13% after 5500
> >msec wait
> >2004-10-31 10:16:31 mythbackend version: 0.16.20040906-1 www.mythtv.org
> 
> Try setting the HD card to a working initial channel by running dtvsignal 
> (from the pcHDTV tools),
> e.g. dtvsignal /dev/dtv 19 (replacing 19 with a high-signal channel in your 
> area)
> before starting mythbackend.
> 
> I find LiveTV won't start if the ATSC tuner is stuck on a weak signal, 
> though it manages to switch fine when a recording is scheduled.
> 
> Don't know if that helps at all with your setup, but it works in mine 
> (HD-2000 and WinTV).
> --Wendy