[mythtv-users] How to ensure STB is powered ON? Re: SA3250HD is turning itself off?

Chris Weiland hobbiticus at gmail.com
Fri Jan 11 15:42:22 UTC 2008

At least for my SA4250HD, I was able to modify the mythtv code slightly in
order to turn on the STB when it begins capturing and turn it off when the
stream stops.  For example, if I hit watch tv, myth will turn on my STB, and
tune the channel.  Switching channels does not toggle power.  When I quit
watching tv, myth will turn my STB off.  However, this does require a
firewire connection to the box.

There are certain codes that you can send over firewire to turn on/off the
SA STBs and even query their on/off state.  I think I found the codes from a
mailing list archive entry about the SA3250HD, but the same codes worked for
my SA4250HD (even though 4250HDs aren't even supposed to work at all in myth
right now, I believe).

I'm at work right now, so I don't have the details, but I can pass on the
relevant info once I get home.

On Jan 10, 2008 8:40 PM, Evuraan::ഏവൂരാന്‍ <evuraan at gmail.com> wrote:

> Adam Hirsch wrote:
> > The files will be slightly different, so diff won't help you... but I'll
> > tell you what will: gzip.  10 seconds of all-black video will compress
> down
> > to a very small file, while 10 seconds of actual running video with
> > changing images and sound will not.  Someone smart on this list
> suggested
> > this solution to me a year ago, and it's worked a treat for me since
> then.
> >
> (1) cat needs to be killed sometimes
> (2) 10 seconds is too much time to wait.
> check out the link
> http://evuraan.blogspot.com/2008/01/how-to-ensure-set-top-box-stb-is.html,
> it takes just 2 seconds to run.
> Plus, it checks multiple frame to be very sure, before it sends a power
> flick signal.
> For optimal results, I made my channel change script call this, that way
> read access to your video device is almost 100% guaranteed.
> You can view the script here also:
> http://malayalam.homelinux.net/evuraan/check_stb.txt
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