[Libav-user] x265 HVEC much slower on AMD than Intel

[Dave]

On Thursday 12 October 2017 14:05:50 Carl Eugen Hoyos wrote:
> 2017-10-10 23:06 GMT+02:00 Dave <ffmpeg at dgmm.net>:
> 
> > The most obvious difference when running ffmpeg are the following lines
> > On Intel box
> > x265 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
> >
> > On AMD box
> > x265 [info]: using cpu capabilities: MMX2 SSE2Fast LZCNT
> 
> This indicates that the Intel cpu can at least be much more efficient
> and that higher throughput is no surprise.

Thanks Carl.  I was fairly confident that those instruction set extensions
would be the prime reason for the difference, so I guess the only option
is to build a new box with the "right" CPU.