[mythtv-users] External channel change program for Scientific Atlanta 4240HDC?

[Keith Pyle]

On 06/04/11 19:51, Greg wrote:
> On 06/04/2011 06:12 PM, Keith Pyle wrote:
>> > Does anyone have a working program for changing the channel on a
>> > Scientific Atlanta 4240HDC via Firewire?  The usual searches turned up
>> > nothing except some discussion of problems 2-3 years ago where the
>> > sa4250_ch program reported success but did not change the channel.  That
>> > is the behavior I see now, even after modifying 4250_ch.c to check the
>> > return value of the command function call (i.e., the command function
>> > avc1394_transaction_block returns a non-NULL value which is documented
>> > as a successful command).
>> >
>> > For now, I'm just trying to get channel changing via Firewire through a
>> > standalone program instead of using lirc - not trying to capture in Myth
>> > over Firewire.
>> >
>> > Thanks.
>> >
>> > Keith
>> > 
> Look at the third post....   
> http://ubuntuforums.org/archive/index.php/t-712789.html
>
The program in the third post was essentially the same as the sa4250_ch
I was using and it has the same behavior: it claims it changes the
channel on my SA4240HDC, but doesn't.  There was, however, a solution
further down in the thread.  This code has to be modified to send a
second command that is a key release.  With this extra code, it now
successfully changes channels.

Thanks for the pointer.

Keith