[mythtv-users] mythtv 0.24.2 and va-api with mplayer

[jedi]

On Thu, Mar 01, 2012 at 11:31:44PM +1100, Christopher Kerr wrote:
> On Thu, Mar 1, 2012 at 11:13 PM, Kenni Lund <kenni at kelu.dk> wrote:
> >
> >
> > 2012/3/1 gacmb5 gacmb5 <gacmb5 at gmail.com>
> >>
> >> On 2012-02-29 22:34, Raymond Wagner wrote:
> >> > Why do you need VAAPI?  A 2.5GHz SB i3 should handle just about any
> >> > video you want to throw at it in software.  MythTV 0.25 currently
> >> > supports VAAPI, has for some time, and should be released in just over a
> >> > month.  Should 0.25 be delayed, or VAAPI disabled or otherwise unusable
> >> > by you for whatever reason, you still have plenty of CPU in reserve that
> >> > it doesn't matter.
> >>
> >> Lower CPU usage means less heat and less noise.
> >
> >
> > ...less heat on the CPU cores while the higher GPU usage means more heat on
> > the GPU core...which in this case is integrated in the CPU :-P
> 
> I'm pretty sure video decoding (not deinterlacing) is performed by a
> custom ASIC - yes, it's integrated into the die, but because it's
> single-purpose hardware I'd expect it to produce significantly less
> heat than a general purpose processor.

   With ION kit, I have seen lower overall heat generation when using GPU video
acceleration versus using a comparable amount of computation on the CPU. Since
the GPU is specialized hardware, the idea that it would have to "work" less
hard is not surprising. I would expect Intel kit to be the same way.

    Most efficient part doing what it's specialized to do. 
    Less heat overall.
    Less need for cooling (active or passive).
    Less noise.