[wolf550e]

x264 does not use GPU hardware, so they're both using just the CPU. WebM fails to use more threads or 256bit or 128bit registers correctly.

[1ris]

recent versions of x264 do use GPU hardware via OpenCL, but the performance gain is questionable.

http://www.planet3dnow.de/vbulletin/showthread.php/406096-Be...