[x264-devel] PSNR Calculation

[James Darnley]

On 12/08/2011, A. Mullius <mullius87 at gmail.com> wrote:
> Oh, that's not good for my issue. I encode a video at different bitrates(100
> kbit - 10Mbit) and resolution(320p to 1080p). Therefore I use the psnr as
> metric to decide at which bitrate i go up to the next higher resolution. How
> do you decide when it is better to use a higher resolution or a lower one at
> a given bitrate?

When the quality of a certain resolution drops below a given point,
reduce the resolution.  The psnr is one way to get this information.
I don't see how the fact that the encoder only knows about what it is
given affects this.