[mythtv-users] 8400GS for bluray?

[Christopher Kerr]

On Mon, Jul 4, 2011 at 11:00 AM, Neil Salstrom <salstrom at gmail.com> wrote:

> On Sun, Jul 3, 2011 at 4:35 PM, Raymond Wagner <raymond at wagnerrp.com>
> wrote:
> > On 7/3/2011 18:21, Neil Salstrom wrote:
> > The 8400GS has plenty of power for Bluray decoding, as decoding is done
> > in a custom ASIC, not the GPU.  The Matroska demuxer has a nasty
> > behavior of bursty reads.  With the high bitrate of (real) Bluray
> > content, this could cause problems if you are streaming across a slower
> > network.
> > _______________________________________________
> > mythtv-users mailing list
> > mythtv-users at mythtv.org
> > http://www.mythtv.org/mailman/listinfo/mythtv-users
> >
>
> Hmm...  The video is on a drive local to mythfrontend so it's not
> going across the network.  What do you mean by "a custom ASIC"?
>

The video decoding (but not the deinterlacing) is performed by a
purpose-designed chip quite separate from the actual GPU. The deinterlacing
is performed by the shader units on the GPU.

As a result of this, an 8400GS is just as good at decoding blu-ray as a
GT430 - the newer cards have added support for a handful more formats, but
the decoding for existing formats is basically unchanged.

An 8400GS isn't as good at PLAYING blu-ray as a GT430, because it's a much
slower GPU that can't keep up with the highest quality deinterlacing
methods.

- Chris
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.mythtv.org/pipermail/mythtv-users/attachments/20110704/c2481102/attachment-0001.html