[mythtv-users] detecting blank screen if video source is turned off
lynchmv at gmail.com
Thu Oct 11 16:05:31 UTC 2007
On 10/11/07, Adam Hirsch <mythtv at quakerporn.com> wrote:
> 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?
If you're using an irblaster or some sort of channel changing script,
perhaps you could utilize the discrete power codes somehow?
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