[x264-devel] Does anyone find bugs on PSNR calculation of x264?

[Loren Merritt]

On Thu, 14 May 2009, kenter wrote:

> I was trying to disable Top-Right prediction modes on x264 now, I find the
> psnr difference is rather low for enable top-right and disable it. While the
> subjective quality of disable top-right modes is greatly down. I guess there
> are some bugs on calculation of PSNR in x264, Is there any bug feedback on
> this issue?

x264's PSNR calculation works.

I would rather guess that your modification broke x264, so that the 
reconstructed frame that PSNR is measured on no longer matches what the 
standard says your bitstream means. But without the code, I can only 
guess.

--Loren Merritt