Re: Hardware Transcoding with DirectX?
- From: "Neil Smith [MVP Digital Media]" <neil@xxxxxxxxxx>
- Date: Mon, 04 Sep 2006 22:55:22 GMT
On Mon, 04 Sep 2006 20:47:08 +0100, Andy Champ <no.way@xxxxxxxxxx>
wrote:
It's new PC time for me, and I'm going to be doing *a lot* of
MPEG2/MPEG4 transcoding. I understand some graphics cards support this,
and do so at enormous speed.
Can anyone advise me as to which ones, and whether their drivers will
hook into a DirextX graph?
I don't know of anything that will "hook into a DirectX graph"
directly. There's several standalone apps which can benefit from GPU
acceleration of transcoding.
The most notable recently was the ATI Avivo encoder, I believe it's
now (or due soon) part of the ATI driver package if that's what you
mean. It's strictly limited to discrete settings, presumably to get
the best column inches from online reviews - have a look on Toms
Hardware (THG) for details of the testing.
WME Studio encoder is also intended to offer hardware assist from the
GPU, but that's not MPEG2/4 transcoding - it will only really accept
uncompressed AVI or existing WMV content as input, and only outputs
WMV (though you can go to VC-1 at very high bitrates)
I've read that the studio encoder only offers this GPU assist on a
very few favoured high end cards. My testing indicated a significant
uplift when overclocking lower end NVidia cards though, when compared
to the standard encoder which showed no benefit from GPU overclocking.
Cheers - Neil
------------------------------------------------
Digital Media MVP : 2004-2006
http://mvp.support.microsoft.com/mvpfaqs
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