[mythtvnz] Mini-itx vdpau motherboards?

[Nick Rout]

The goss seems to be that if you are using vdpau then the PCI bus is
more than sufficient for the task, because you are pushing the
compressed video stream to the card.

Bluray disk movies have a max bitrate of 54Mbits/sec
(http://en.wikipedia.org/wiki/Bluray). Most HiDef stuff you get will
have a lower rate.

PCI has a max rate of 133MBytes/sec
(http://en.wikipedia.org/wiki/PCI_Local_Bus) )note 133 M /BYTES/ vs 54
M /BITS/.

Even with real PCI rates being half the maximum there is still plenty
of room to push the video stream over PCI to the graphics card, by a
factor of more than 10.

If you don't believe me there are plenty of examples of people having
very good results with PCI and vdpau.

Cheers.

2009/3/18 Douglas Pearless <Douglas.Pearless at pearless.co.nz>:
> I suspect that you will not find any as I note the bandwidth of the old PCI
> bus may not be sufficient to transfer all the data to the required NVIDIA
> graphics card in a timely manner...
>
> You may be far better to wait for the NVIDIA ION platform to generate a real
> product for a (diskless) mythtv frontend.
>
> Cheers
> Douglas.
>
> Quoting "Craig Whitmore" <lennon at orcon.net.nz>:
>
>>
>>
>> On Wed, 2009-03-18 at 16:11 +1300, Nick Rout wrote:
>>> Having failed to find easy access to a PCI vdpau capable video card in
>>> NZ I though an alternative might be to find a mini-itx sized vdpau
>>> compatible motherboard, ie with onboard nVidia graphics.
>>>
>>> Rather than spend more hours searching for the grail, can anyone point
>>> out such a motherboard from a NZ retailer (online or in ChCh).
>>>
>>> Frontend only so provided it has the requisite video card onboard
>>> there is no need for any PCI[e] slots.
>>>
>>> I will be connecting it to a flat panel 720p TV with VGA or HDMI. HDMI
>>> with sound out would be nice but not essential.
>>
>>
>> The wholesalers in NZ sell the Intel Atom Processor Motherboards
>> (D945GCLF) at a reasonable cost.
>>
>>
>> http://www.intel.com/products/desktop/motherboards/D945GCLF2-D945GCLF2D/D945GCLF2-D945GCLF2D-overview.htm
>>
>> Anyone who gets stuff from Tech Pacific/Ingram Micro should be able to
>> get them.
>>
>> Then you have to find a PCI vdpau card... I would love if someone knew
>> what would work. I cannot find one myself.
>>
>> Thanks
>>
>>
>>
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