[mythtv-users] chan up/down succeeds, but change directly to a channel fails

[Nick Morrott]

On 04/10/2008, Adam Hirsch <mythtv at quakerporn.com> wrote:
> Hey, folks.
>
>  Long-time mythtv user, here.  I'm running 0.21-fixes via SVN, and I
>  recently rebuilt my setup from scratch.  Only one bug remains, but it's a
>  weird one.  Changing channels up or down to an adjacent channel from within
>  MythTV works, but keying in a specific channel to jump to fails, as does
>  any scheduled recording requiring a channel change.  In both cases I get
>  the "Error was encountered while displaying video" message.
>
>  I'm using an external channel change script which works perfectly from the
>  commandline -- I can jump to whatever channel I specify, no problem, so the
>  problem's not with the set-top box nor the channel change script itself.
>  The issue only happens from within MythTV and trying to change to a
>  non-adjacent channel.  I've spent several hours combing through error logs
>  and searching lists, but no dice.  It's a weird one.
>
>  The backend log is pretty sparse, when the failure occurs:
>
>  ##  2008-10-04 17:12:01.224 TVRec(1): HW Tuner: 1->1
>  ##  2008-10-04 17:12:02.116 Channel(/dev/video0): SetInputAndFormat() failed

First, check you have your capture card set up correctly in
mythtv-setup. You could also try editing your channel changing script
to return immediately after sending the irsend command to the
background - as it is possible (although it may not be the case here)
for a timeout to occur during channel changing.

-- 
Nick Morrott

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