[mythtv-users] Turn cable box off after recording

Preston Crow pc-mythtv08a at crowcastle.net
Wed Jun 17 16:59:44 UTC 2009

On Wed, 2009-06-17 at 12:48 -0400, George Galt wrote:
> On Wed, Jun 17, 2009 at 12:39 PM, Preston
> Crow<pc-mythtv08a at crowcastle.net> wrote:
> > On Wed, 2009-06-17 at 12:35 -0400, George Galt wrote:
> >> What do you use to detect the current power state of the box over firewire?
> >> I've been (half-heartedly) trying to do this for a while with no luck.  The
> >> trunk version of 6200ch can toggle power, but ASAIK won't return the power
> >> state (I don't believe this capability is in 0.21 stable).  Is there
> >> something else I'm missing that does this?
> >
> > If you look in the Myth code, you'll see that it can natively check the
> > power state, turn the box on if needed, and change channels, so most
> > people don't need to use 6200ch anymore.  Using the code from there, I
> > modified 6200ch to add an option to query the current power state.
> >
> > Now all I want is an option to query the current channel, but I haven't
> > found a command to do that, and I haven't found good documentation on
> > how these boxes work.
> >
> >
> Thanks.  I'll take a look.  I'm assuming the code is in the firewire
> tuner section?  If not, could you give me a hint on the location?
> As for not using 6200ch, I'm capturing from the cable box via s-video
> to a PVR-150 for SD recordings (no need to capture HD for non-HD
> recordings), so I still need an external channel changing program.  I
> probably could just capture via firewire, but I got burned by this a
> few years back (in the early days of firewire capture, so I'm sure its
> better now) and the WAF factor went down.  Great WAF with
> cable->s-vid->PVR-150.

Yes, the code is in the firewire tuner section.  But since it's a pain
to duplicate what's already been done, I'm attaching my modified
6200ch.c file.  If anyone has advice on pushing this into the trunk,
that would be appreciated.

As to using this for s-video to a PVR card, I'm doing the same thing,
but only for 5C channels.  While my box does convert everything to a
single format on the analog outputs (1080i, since that's what my TV is
natively), the firewire gets the original MPEG in whatever resolution
they sent it out in, so that will always beat the PVR card.
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