[vdr] HDTV -> mpeg4

Udo Richter udo_richter at gmx.de
Wed Mar 30 17:33:22 CEST 2005


Grégoire Favre wrote:
> When libavcodec wasn't x86_64 asm optimized, I was getting about 20 fps
> in 64 bits mode and 22 fps in 32 bits emulation, and now that's it's asm
> optimised, I get about 60 fps, so yes I think it make an hudge
> difference :-)

Impressive! And thats not just because x86-64 implies SSE2 and other
nifty optimizations? eg. is the x86-32 build already SSE2 optimized?

Video processing usually doesn't use integer numbers beyond 4 billion,
and 64-bit data processing was introduced by Pentium-MMX in 1997 too...

Cheers,

Udo



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