Re: Asf fastforward performance
- From: "Alessandro Angeli [MVP::DigitalMedia]" <nobody@xxxxxxxxxxxxxxxxxx>
- Date: Mon, 30 May 2005 12:20:39 +0200
Wael_Bakr wrote:
> 1-when i use single processor system i get 2X very smooth
> without any lag or chopiness at all , the system just
> ignores
> my 3x requirement and does try its best to give me a
> smooth 2x playback instead of choppy and lagging 3x
> playback speed
Notice that the DirectSound renderer does not support rates
higher than 2X.
[CUT]
> 4-also i have the hopes that my ATi X800 vga card could
> help with that because it has a hardware MPEG4 video
> acceleration
> so i assumed that i should be able to run 3X on a single
> processor system with no problem (because in this case the
> vga card sould be able to take most of the load from the
> processor)
Forget it. The acceleration seems to be only partial, there
are many different flavors of MPEG4 at the moment that who
knows what the card supports and what you have in the ASF
(how did you create it?), who knows whether the decoders can
actually use the acceleration with the current software and
driver implementation and, lastly, I don't think the GPU
decoder can help decode more than 1 stream.
> 5-i also tried the win64 (WindowsXP 64 bit) but it didn't
> help at all as i got exactly the same results with
> WindowsXP 32 bit.
A 64 bit CPU at the same clock speed of a 32 bit one is not
really faster (but for some gain in cache in processor
optimizations), it only has a wider memory bus and wider
registers.
--
// Alessandro Angeli
// MVP :: Digital Media
// a dot angeli at psynet dot net
.
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