[mythtv-users] detecting blank screen if video source is turned off

Adam Hirsch mythtv at quakerporn.com
Thu Oct 11 15:53:48 UTC 2007


I asked this once, several years ago, and never found a particularly good
solution.  Figured I'd try it again.

Every once in a while, our cable box turns itself off.  Since we don't
watch recordings every day, this occasionally results in several days
running where Myth will cheerily record entirely blank hours of television.
This is irritating and significantly drops the WAF, as you may imagine,
though I blame most of the problem on the cable box.

I tried capturing 10 seconds of video directly off /dev/video0 when the
video source was showing images and when it was turned off, hoping that the
two captured files would be different in size, and I could script a nightly
check and turn the cable box back on.  No luck.

Anyone else had this problem, or have a creative solution?

Adam

-- 
Suzanne:  See, men are always talking about their things.  Like it's not them.
Gaston:   What things?
Suzanne:  The things between their legs.                       <adam at baz.org>
Gaston:   Ah, yes.  Louie.        -Steve Martin, _Picasso at the Lapin Agile_


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