[mythtv-users] CPU not enough to drive 1080P? Core2duo

[Mark Hutchinson]

What I am seeing now is this.  HD is still fine.
When playing SD, it is very jittery.  If I rewind just a bit and let  
the SD play, it becomes normal.
What could this be?

On 8-Feb-08, at 10:51 AM, Meik Piepmeyer wrote:

> Mark Hutchinson wrote:
>> I am finding exactly the same thing.
>> Capture via firewire.  HD channels are great.
>> SD channels are a bit jitterty and so is the SPDIF audio.
>>
>> Could this be the 8600 Nvidia card?  What would a better XvMC card  
>> be?
>> 8800?  or is the 8XXX series that is not working with XvMC?
>>
>> Now the question.  WHY in the world would SD be jittery and HD ( much
>> greater throughput ) is clear and perfect.
>>
>> Ideas?  There is really not much in the logs.
>> [...]
>
> Hi Mark,
>
> just a guess: It could be the power saving of the CPU. Maybe when  
> doing
> HD it is mostly at the maximum frequency - but SD is not much work and
> it swaps from low to high frequency. This should not be a problem, but
> if the cpufreq or anything related to it is buggy it would be  
> possible.
> I would try to play SD without any energy saving of the CPU.
>
>
> Meik
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