Doom9's Forum - View Single Post - BD3D2MK3D v1.17: Convert 3D BDs or MKV to 3D SBS, T&B or Frame-sequential MKV

sneaker_ger · 21st December 2016, 11:43

--psnr will measure psnr. --tune psnr will optimize encoding for best psnr result by disabling AQ and psy. So they do different things. --tune psnr is dangerous and harmful and should not be used for anything but testing. (similar applies to --ssim/--tune ssim)

Psy hurts psnr and ssim but looks better to humans. The x264 developers added the warning because in comparison tests against encoders that don't have any psy feature the results are skewed/unfair.

21st December 2016, 11:43	#1124 \| Link
sneaker_ger Registered User Join Date: Dec 2002 Posts: 5,565	--psnr will measure psnr. --tune psnr will optimize encoding for best psnr result by disabling AQ and psy. So they do different things. --tune psnr is dangerous and harmful and should not be used for anything but testing. (similar applies to --ssim/--tune ssim) Psy hurts psnr and ssim but looks better to humans. The x264 developers added the warning because in comparison tests against encoders that don't have any psy feature the results are skewed/unfair. Last edited by sneaker_ger; 21st December 2016 at 12:06.