[mythtv-users] Firewire channel change for SA4200?

Rodney Morris rodamorris at gmail.com
Wed Jan 20 21:46:03 UTC 2010


On Wed, Jan 20, 2010 at 4:01 PM, steve <networks1 at cox.net> wrote:
>>> I am hoping to set up firewire channel change for a Scientific Atlanta
> 4200
>>> box.  I checked the mythtv docs ./contrib/channel_changers as suggested
> on
>>> the wiki.  It doesn’t have a changer for the sa4200 but it has one for
> the
>>> sa3250.
>>>
>>> Does anyone know is this changer will work for sa4200?  If so, would I
> use
>>> similar compile arguments as given in the wiki for the Motorola box, i.e.
>>>
>>> cc -std=gnu99 -o sa3250ch sa3250ch.c -lavc1394 -lrom1394 -lraw1394
>>>
>>> If not, does anyone know if there is a channel changer available for the
>>> sa4200?
>>
>>I know nada about the SA boxes, but really, it ought to be possible
>>for us to have a single firewire channel-change program that covers
>>all set top boxes. They're all using libavc1394 for communications
>>(A/V Commands over 1394), which is pretty well defined for all the
>>basics we need. MythTV changes channels on most (all?) firewire set
>>top boxes internally for firewire recording devices, anyway... (not
>>that I have time or desire to do anything about this myself right now,
>>I'm just sayin').
>
> That would be most helpful for all of us non-wizards.
>
> Meanwhile, I have found evidence in the 0.20 release notes and here
> http://www.gossamer-threads.com/lists/mythtv/users/209687 that someone
> modified the sa3250 changer code to work with the sa4200 too.
>
> Now if I only knew about the compile arguments.  I suppose the README for
> that changer would answer all these questions, but it's empty.
>

MythTV's internal firewire channel changer should work with your
SA4200.  MythTV's internal channel changer works very well with my
SA3250HD, which I set-up as a SA4200 in MythTV.  (My SA3250HD had to
be setup as a HD4200 under Myth to properly change channels.)

Rod


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