[x264-devel] Regression in encoding speed from 20090629 version to later versions

[Jason Garrett-Glaser]

On Fri, Nov 27, 2009 at 12:53 AM, devsk <funtoos at yahoo.com> wrote:
> Hi,
>
>
> I have a Gentoo AMD64 system here and I
> encountered a regression in encoding speed with mencoder recently with
> an update which updated x264 package from 20090629 to a later version.

That's because the defaults changed.  Obviously, if different settings
are used, you will get different performance results.

Read the commit log around the date of the "regression" before you
complain about regressions:

commit af2a4ecd7bcefc97c8aa83913c9a2980206f9cd0
Author: Jason Garrett-Glaser <darkshikari at gmail.com>
Date:   Wed Jul 1 21:14:57 2009 -0700

...
    Our defaults have also changed: new defaults are --subme 7
--bframes 3  --8x8dct --no-psnr --no-ssim --threads auto --ref 3
--mixed-refs --trellis 1 --weightb --crf 23 --progress
...

Dark Shikari