Harald Alvestrand wrote:
psnr values of 35 dB where x264 achieves 40 dB - it seems psnr isn't particularly sensitive to the resulting blurriness).
Yes, it's well-known that PSNR loves low-passing. It's not the only metric that's going to have these problems. FastSSIM will probably be similarly blind. Fixable problems, maybe, but I don't want to get in the business of designing my own metrics. I'm not even sure there's good data on human preferences for when one should downsample, but I haven't spent any time looking.
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