[mythtv-users] Temporal 2x vs Temporal-Spatial 2x

[Steven Adeff]

On Thu, Feb 23, 2012 at 9:19 PM, Phil Bridges <gravityhammer at gmail.com> wrote:
> On Thu, Feb 23, 2012 at 9:13 PM, Mark Lord <mythtv at rtr.ca> wrote:
>> On 12-02-08 12:26 PM, Mark Lord wrote:
>>> On 12-02-08 09:31 AM, William Powers wrote:
>>>>> I didn't think the 520 could do Advanced 2x on 1080i? I would like to know
>>>>> if you are indeed using it, and if you don't get skipped frames.
>>>>>
>>>> In a half-height frontend I have tried a passive G210, a passive GT520 and a
>>>> GT220 with a fan. At least I think it's a fan. It sounds like a coffee
>>>> grinder and the card eventually overheats anyway. But it's supposed to be a
>>>> fan. In a full-height frontend I have tried an 8400 GS, a 9500 GT, and a GT
>>>> 430, all passive. Only the 220, 430 and 9500 would reliably do Advanced,2X
>>>> and, according to qvdpautest, the 430 and 9500 didn't have a lot of headroom.
>>> ...
>>>> Fermi stream processors appear to be about half as capable as pre-Fermi
>>>> units. Whether at is due to drivers or the design, I cannot say.
>>>
>>>
>>> That's interesting.  So I just now went and ran the only objective benchmark
>>> that seems to exist -- qvdpautest -- on my shiny new ASUS fanless GT430,
>>> and compared results with an older run on the previous
>>> (2-slot) Zotac fanless GT240 card.
>>>
>>> The GT430 is faster at decoding than the GT240, twice as fast for VC-1,
>>> and somewhat faster on all of the others.
>>>
>>> But the GT240 blows it away for de-interlacing modes, by a wide margin.
>>> The GT430 still comes out with room to spare for Advanced/2X,
>>> but not nearly as much as the GT240.
>>>
>>> Both cards have 96 stream processors, but the GT430 is Fermi, and the GT240 is not.
>>
>> Time for a followup:
>>
>> The GT430 card does indeed run into difficulties (jerky playback)
>> when "vdpauhqscaling" is enabled and a high-resolution interlaced file
>> is being played (and scaled).
>>
>> The older GT240 card did not have any issues with that, but the GT430 does.
>>
>
>
> Hmmm - looks like there's a trade-off between HD audio and HQ video.

Mark,

what is being scaled in this case? ie 720p->1080p? I wonder if
hqscaling is really needed for that, and if not, perhaps a profile
that enables it for converting SD content to HD but does not for 720p
to 1080p?

Phil,

I think if you were to get a sufficiently expensive Fermi card you
could have both =P


-- 
Steve
http://www.mythtv.org/wiki/User:Steveadeff
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