[mythtv] Firewire channel changing

John P Poet jppoet at gmail.com
Wed Jul 26 19:59:01 UTC 2006

On 7/26/06, Allan Wilson <allanwilson at gmail.com> wrote:
> On 7/26/06, John P Poet <jppoet at gmail.com> wrote:
> >
>  I have firewire working more than less with a SA3250HD cable box.  In
> general capturing video works well.  Channel changing via firewire
> works most of the time, but fails occasionally.
> When I first started playing with this firewire setup, I tried live tv
> for a bit.  It did not take long for the firewire port to get very
> confused.  If I avoid live tv, the firewire is much more reliable.
> I believe I am seeing a pattern where channel changing via firewire
> works well as long as it does not need to record two shows
> back-to-back.  I am starting to wonder if the channel change is
> unreliable if the firewire port is already open and streaming video.
> Does Myth's firewire recorder close down the port before calling the
> external channel changer?  If not, I believe doing so would make the
> system more reliable.
> This is all conjecture, as I am still very new to this firewire stuff.
> John
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> I don't use live TV much I record shows over firewire back to back on
> different channels all the time and I haven't ran in to this problem. I did
> have to make some slight modifications to the sa3250ch.c program to get it
> to work on my box but nothing to do with changing channel. I'll try with
> LiveTV tonight and I will post back if I notice any problems. Where you
> using channel up/down, manually entering channel, or using the guide?
> Allan

I have "browse" mode enabled.  I CHANNEL-UP until I find the channel I
am interested in, then hit select to change to it.

I basically never use live tv, so I really don't care if it works.  I
am just trying to figure out why the channel change sometimes fails.



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