[wellylug] how slow

[Stig Telfer]

On 16 Mar 2005, at 20:59, E.Chalaron wrote:

>> The question is, what are you doing?
> Ok you wanted it :-)
> [SPAM]
> Converting 8/Super8 mm/16 mm movies. I shoot each movie frame one at a 
> time,
> knowing that each small Kodak reel is about 3600 frames, each of them 
> at
> 1400*1100 pixels in 4:2:2 it makes about 4.5 Mb *3600 for a 3.ish 
> minute
> movie to denoise, scale down + other stuff to get a DV file.
> some clips here :
> http://calenduro.free.fr/DEMO
>
> So it is more than email ! :-)
>
> I think mjpegtools is now available for 64 bits.
> Will see... before ordering :-)
>
> Thanks a lot
> E

Did I see you in a newspaper article about a month ago?

A 64-bit architecture appears to be of little benefit to your 
application as you're working with bit-manipulation and byte 
quantities.  As somebody else said, this is altivec (or similar) 
territory.  A 64-bit platform will help for incidental reasons, for 
example they are specified with larger caches and good memory 
performance.

I think that since the image data is too bulky to cache well, high 
memory bandwidth is the main factor you should be looking for.

Regards,
Stig Telfer