[mythtv-users] OT: VDPAU and VP3 or VP2?

Bill Williamson bill at bbqninja.com
Thu Jul 30 07:30:59 UTC 2009


On Thu, Jul 30, 2009 at 4:59 PM,
sonofzev at iinet.net.au<sonofzev at iinet.net.au> wrote:
>
>
> On Thu Jul 30 15:31 , "sonofzev at iinet.net.au"  sent:
>
>>
>>
>>On Thu Jul 30  1:24 , Raymond Wagner  sent:
>>
>>>Khanh Tran wrote:
>>>> It seems the latest PureVideo implementation (VP3) is only supported
>>>> on the rare desktop Nvidia cards (like this one:
>>>> http://www.newegg.com/Product/Product.aspx\?Item=N82E16814121235\) or
>>>> laptop/integrated motherboards.  I'd like to get a few desktop cards,
>>>> but the desktop cards, but I'm wondering if VP3 is really all that
>>>> much more important than just VP2 in a newer card like the Geforce
>>>> 9400 GT or 9500 GT.
>>>>
>>>VP2/3 are not official names for anything, however the 'rare' cards you
>>>speak of offer a VC-1 entropy decoder to allow full bitstream offload of
>>>VC-1.  This was desirable early on with VDPAU, however several months
>>>ago, support was added for the less capable cards to do this decoding
>>>within the driver, allowing VC-1 decoding in all VDPAU-capable cards.
>>>
>>>Currently, the recommendation for a discrete card is one capable of
>>>using all available deinterlace modes at full 1080i resolution.  That
>>>typically means a 9500GT or 8600GT.
>>>
>>
>>After following all the instructions here last night;
>>
>>http://www.mythtv.org/wiki/VDPAU
>>
>>including triple buffer, upping cpu speed to 1.8 GHz and turning off composite
>>
>>I've found that Advanced 2* actually works well on an 8600 GS with 256 MB as
>>well... so all de interlace modes appear to be available.
>>
>>although it's pretty hard to get these cards now..
>>
>>Is this not expected?
>>
>
> My apologies.. I'm a dufus... I have 8600 gt cards...
> Is it likely that the ramped up cpu speed is making a difference.. I could barely
> tell and I think it might be due to an expectation on my behalf not a reality..


It's the number of shaders, not the speed, making the difference.


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