[mythtv-users] VAAPI on mythtv-0.26

[Robert Dege]

On Fri, Apr 5, 2013 at 1:27 PM, Joseph Fry <joe at thefrys.com> wrote:

>
>  >> is there a list of processors that work with VAAPI and "should" be
>>> >> fast enough for typical MythTV use?
>>> >
>>> >
>>> > Any Sandy or Ivy Bridge processor should work (the specs should say it
>>> has
>>> > INTEL HD graphics built in).  I am using a Sandy Bridge Celeron G540
>>> (just
>>> > about the slowest sandy bridge processor you can buy today) and it was
>>> > powerful enough for CPU playback... but VAAPI freed up the CPU for
>>> > comflagging and whatnot.
>>> >
>>> > In reality, if you have any sort of GPU acceleration (VAAPI, VDPAU,
>>> etc)
>>> > there isn't an x86 processor made today that is NOT fast enough.
>>>  Mythtv
>>> > doesn't use that much CPU unless your doing post processing (commflag,
>>> > transcode, etc).
>>>
>>> right, but not all GPU acceleration is made the same, the older cards
>>> were not capable of the support required for typical MythTV file
>>> playback, especially with deinterlacing taken into account.
>>>
>>> It's not the CPU speed I'm concerned with but the GPU
>>> speed/capabilities. If I go and buy a Sandy cpu with "INTEL HD", and
>>> connect it to my 1080p tv can I expect the quality of it's 1080i
>>> playback with deinterlacing to be on par with what I get from my
>>> NVidia GT220 in regards to CPU load reduction?
>>
>>
>> Ahh... now that is a completely different question than  "is there a
>> list of processors that work with VAAPI and "should" be
>> fast enough for typical MythTV use?"
>>
>> I doubt that VAAPI would match a GT220 with Advanced 2X deinterlacing.  I
>> believe that VAAPI only supports BOB 2X and One Field... I read something
>> that suggests future cores may add additional de-int options?
>>
>
> Correction... the cores, even some before sandy-bridge, had support for
> advanced deinterlacing methods... it's all about the intel driver.
>  Apparently they simply haven't enabled the support for advanced
> deinterlacing in the driver yet, just Bob.
>
> Regardless, for casual watching the picture looks fine to me.  I just put
> on a 1080i hockey game, and I definitely see some interlace lines around
> players bodies, and the image isn't as crisp as I would like... but it's
> watchable. I stand by my comment below.
>
>
>>
>> I would say that VAAPI is ideal for secondary frontends... but I will
>> stick to VDPAU for my primary, big, living room TV where quality matters.
>>
>>
>
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>
>
This sounds like a worthwhile test.  I'll try to hook mine up over the
weekend and see if I notice any picture issues.
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