Re: Audio encoders optimized for altivec (I have a G4)
On Wed, 2002-04-24 at 15:48, David Stanaway wrote:
> On Wed, 2002-04-24 at 08:13, Michel Dänzer wrote:
> > On Tue, 2002-04-23 at 21:48, David Stanaway wrote:
> > >
> > > I was wondering if anyone could recommend an encoder for me?
> > >
> > > I use grip as a front end, and tried oggenc from vorbis-tools but I can
> > > only encode at half realtime!
> > >
> > > I have only used mp3 encoders before on intel systems, so maybe this is
> > > just a sign that ogg is a more complex transformation than mp3 but I was
> > > hoping for at least real time perfomance.
> >
> > What clock speed etc. is that? I get more than realtime with a 667 Mhz
> > G4. The compression you want to achieve probably also matters, I usually
> > encode for 160 kBit/s average rate and leave the rest at defaults.
>
> Actually, it varies. I can get a little better than realtime when I am
> not ripping (Using cdparanoia, I get about 3x read rates from the TiBook
> DVD). I have the 500 MHz processor.
Oh yeah, ripping bogs down the whole system very badly here despite DMA
and unmaskirq. Any suggestions for improvements are highly welcome
there.
> I might go and try and find the theory behind ogg encoding and have a
> hack at the source. And see if I can do anything to make it altivec
> friendly as it is a shame to have thhat good and expensive part of my
> system going to waste.
I'd say go for it! :)
--
Earthling Michel Dänzer (MrCooper)/ Debian GNU/Linux (powerpc) developer
XFree86 and DRI project member / CS student, Free Software enthusiast
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