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

Greg greg12866 at nycap.rr.com
Sun Jun 5 14:06:34 UTC 2011


On 06/05/2011 12:20 AM, Keith Pyle wrote:
> 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
>
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No Problem... I tried several times to get firewire working when I had 
the SA 4250HDC ,but was never  able to get to work properly.... That was 
the guide I tried...


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