[mythtv-users] HDPVR setup problems

[Jack McGee]

On 06/01/2015 12:17 AM, Karl Newman wrote:
> On Sun, May 31, 2015 at 10:05 PM, Fred Hamilton <fred at yonkitime.com 
> <mailto:fred at yonkitime.com>> wrote:
>
>     On Sun, May 31, 2015 at 2:39 PM, Jack McGee <jack at greendesk.net
>     <mailto:jack at greendesk.net>> wrote:
>
>         First, it seems even if MythTV cannot change channels, I
>         should at least be able to record whatever the cable box is
>         tuned to, correct?
>
>     I had a similar problem a few weeks ago.  IIRC, I was trying to
>     record something on Myth using my HD-PVR, and I had left the
>     channel change command blank in mythtv-setup.
>
>     That didn't work.  If MythTV can't execute  channel change
>     command, it doesn't try to record.  At least that's how I remember
>     it.  Once I installed 6200ch (I change channels via firewire), it
>     worked fine.
>
>         But, I can cat /dev/video0 > test.ts and get a file I can
>         playback.
>
>
>     That's what I saw as well.
>
>         Why can't Myth record a file and where else should I look for
>         clues?
>
>
>     Work on getting the channel change command working.  You can debug
>     it easily by connecting your TV directly to your cablebox and
>     executing the channel change command outside of mythtv. Once
>     that's working reliably, add it to MythTV setup and see if you can
>     record normally again.
>
> Yes, I encountered that a few months ago when a package update broke 
> my channel change scripts. Unfortunately the default verbosity log did 
> not show the channel change failure (I submitted a patch to change 
> that but it might not show up until 0.28). If you just want to do a 
> quick test without spending a lot of time getting your channel change 
> script working, you could temporarily use '/bin/true' as your channel 
> change command. FYI, I seem to recall that a lot of users choose not 
> to use the built-in IR blaster with the 1212 because of reliability 
> issues. As always, though, YMMV.

Thank you Karl.  That was much help, to set channel change to bin/true 
and confirmed it is getting signal from HD-PVR.  I have firewire card 
ordered now.  I guess if I'm gonna spend a fair amount of time 
troubleshooting channel change, might as well invest that in a reliable 
setup.

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