[x264-devel] PSNR with x264

[Alex Jurkiewicz]

The PSNR values are correctly calculated. However the psy
optimisations in x264 tend to increase visual quality while reducing
PSNR, so x264 emits this warning to remind you PSNR is an imperfect
metric.

Alex

On Mon, Mar 12, 2012 at 8:17 PM, A. Mullius <mullius87 at gmail.com> wrote:
> Hi,
>
> I encoded some videos using x264 and also tracked the PSNR for each frame
> using the --psnr parameter. Unfortunately I get this warning: x264
> [warning]: --psnr used with psy on: results will be invalid!
>
> Does this mean that all my PSNR values are invalid? How can I desable this
> 'psy' ?
>
> Please help me.
>
> Best Regards
>
>
>
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