[mythtv-users] latest recommendation for VDPAU PCI card

f-myth-users at media.mit.edu f-myth-users at media.mit.edu
Sun Nov 1 07:55:48 UTC 2009

    > Date: Sat, 31 Oct 2009 13:44:52 -0400
    > From: Raymond Wagner <raymond at wagnerrp.com>

    > On 10/31/2009 04:36, f-myth-users at media.mit.edu wrote:
    > >      >  Date: Fri, 30 Oct 2009 10:34:30 -0400
    > >      >  From: Calvin Harrigan<charriglists at bellsouth.net>
    > >
    > >      >  You can get a 9500GT without a fan.  The one I have has a huge heatsink
    > >      >  and keeps pretty cool. There is a 512 and 1GB version.
    > >
    > >      >  http://www.newegg.com/Product/Product.aspx?Item=N82E16814187035
    > >      >  http://www.newegg.com/Product/Product.aspx?Item=N82E16814187034
    > >
    > > These cards claim to have a PCI Express 2.0 x16 interface; an MSI
    > > K9N2G Neo motherboard I'm considering auditioning one in only has
    > > the 1.0 interface (half the speed).  None of the Newegg reviews
    > > talk about this; does anyone have any idea whether the speed cut
    > > will matter?

    > Think about what you'll be sending across the bus.  You're talking 
    > compressed video at 5-30mbps that you already pulled from a much slower 
    > PCI or PCIe x1 card.  Even if you're not using VDPAU, the most data 
    > you're going to be sending across is 1080p60 at 3Gbps.  Even the 4GBps 
    > of PCIe 1.0 is far beyond any usage you might see.

    > There have been concerns about compatibility between 1.0 and 2.0 parts, 
    > but I've not heard of any examples of such problems.

It's actually compatibility I was talking about (unclearly, alas)
above; I was thinking of a thread that I couldn't quite remember
enough to find but Nick Rout did (thanks!), namely this one:

So should I try it?  I dunno...  [Crap---and while I was trying to
decide, the 1GB card has apparently gone back up by $10 and is no
longer the price of the 512MB.  But do I need more than 512MB?  For
SD, presumably not; for HD, I can't remember whether 256 or 512 was the
magic number, especially since things have been changnig a bit and
there's the recent work on automatically allocating more resources
to difficult streams...]

Assuming that I -need- a deinterlacer for SD-interlaced capture ->
H.264 -> SD CRT TV.  I'm still not sure about that step.

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