[mythtv-users] UPDATE: FireWire Issues on SA 4240HDC

Josh Wisenbaker macshome at afp548.com
Fri Aug 22 05:00:20 UTC 2008


On Aug 21, 2008, at 11:37 AM, Joann Bessler wrote:

>> On Aug 19, 2008, at 5:22 PM, Josh Wisenbaker wrote:
>>
>>> Hi all,
>>>
>>> I've been playing with KnoppMyth R5 on a Core2Duo Mac Mini and the
>>> FireWire tuner is giving me fits. So far I can change channels,  
>>> but I
>>> can never get a channel lock. firewire_tester never reports any
>>> success with the Generic or SA profiles selected in mythtv-setup.
>>> mythtv-setup does correctly identify the GUID and model of my SA
>>> 4240HDC STB.
>>>
>>> I know it isn't an EMI issue on the channels I'm testing. They are
>>> marked as copy freely and I can in fact record and play them back
>>> using the AVCapture and VirtualDVHS apps from the FireWire SDK when
>>> booted into Mac OS X.
>>>
>>> Any tips on how to proceed? I've already burned through the FireWire
>>> troubleshooting steps I've found in the various wikis.
>>>
>>> Thanks,
>>> Josh
>>
>> I've got a bit of an update, but not much good news.
>>
>> After failing to get KnoppMyth working over FireWire I tried a few
>> more distros.
>>
>> I liked MythDora, but I still have the exact same issue (Once I had
>> patched to get the FW working.). I get 100% signal, but only a
>> partial lock.
>> I then tried the Mac OS X builds of MythTV backend and frontend, and
>> I have the same issues. That was the most frustrating of all as I I
>> could quit MythTV, fire up AVCBrowser and stream the video directly
>> to VLC and I can capture with ACCVideoCap to a stream file.
>>
>> I'm rebuilding the KnoppMyth box and will post some logs.
>>
>> Thanks,
>> Josh
>>
>> -- 
>> Josh Wisenbaker, ACSA
>> http://www.afp548.com
>> We're the M in RTFM.
>
> Recording via firewire using the OS X version of mythbackend works for
> me from my Motorola 6412. Not a solution to your problem, I'm afraid,
> but a datapoint which seems to indicate the problem may be specific to
> an interaction between myth and your SA box.

Thanks for the data point on the firewire.

I actually just got Knoppmyth to display some live video via FireWire  
by enabling the "Disable FIrewire Reset" option in setup. It seems to  
have gone away again, but at least now I know I'm on the right track!

Thanks,
Josh


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