[x264-devel] Max thread number of x264

[Jason Garrett-Glaser]

On Tue, Apr 6, 2010 at 9:05 PM, kenter <kenter83 at gmail.com> wrote:
> Thanks for all your help. I've tried your commandline, the result shows for
> --preset slow, CPU ultilize only 700+ and fps is 70.46. The CPU power is
> still largely wasted.

x264 does not scale well beyond one thread per ~40 vertical pixels of the frame.

Additionally, are you using a Linux kernel of 2.6.31 or earlier?
There was a serious bug in the scheduler that massively crippled
performance.

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