[mythtv-users] Live HD TV jumpy

[Rick]

DaveD wrote:
> Thanks for the responses and suggestions.  I appreciate that my CPU is 
> not exactly state of the art, but I'm still wondering how it can 
> simultaneously record TWO high def shows and play back a third, 
> previously recorded, hi def show without any problems at all but can't 
> play back live HD TV!  (live standard def works fine)  How is this 
> different?  The recording of the two shows taxes the system just like 
> live TV, in fact twice as much if I'm recording two shows.  And playing 
> back a THIRD show should REALLY tax it.  But is works GREAT!
> 
> AND, I can watch a show while it's recording and it works just fine!  I 
> can schedule a show to start now and then go to the Watch Recordings 
> menu, select the show and whala!  It plays just fine!  While it's 
> recording!  If I stop the recording and go to the same channel, same 
> system, same everything and try to watch "live" TV, it screws up 
> royally.  There's something different between live TV and recording per 
> a schedule and whatever that difference is, it's screwed up on my 
> system.  Should I be posting something to the developers list to get 
> some detail on the difference?
> 
> BTW, I looked at my CPU usage again and something I've done (upgrades, 
> configuration, xorg.conf settings, ???) has made the CPU usage during HD 
> (1080i with Dolby Digital) playback only use a little over 50%!  When I 
> switch to live TV, it's no higher, but the jumpy, blocky, unwatchable 
> problem is still there.
> 
> Still hoping someone can tell me what's different between watching a 
> show that's recording and watching live TV.  Thanks again.
> 
> DaveD
> 
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Dave,

For what it's worth, I am having the exact same symptoms as yourself.
If I tell myth to record a currently broadcasting show and watch from
the recordings list, I don't have any choppy HD content.  However, if I
go live on that show without telling myth to record it, it is choppy.
Obviously I already have a workaround, but I am extremely curious as to
why it behaves this way.  (Much like yourself).

My system is probably on the border of being able to play HD content, so
I just figured it was a limitation of my system.  My system is an AMD
Sempron(tm) Processor 3100+ with 1.5g mem.

Ah well... maybe someone will solve the mystery ...

Rick