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WorBry · 18th February 2019, 20:51

Quite so ! Granted the tests were conducted with just one source clip (CrowdRun) - although a good one at that - high quality/complexity/motion/hard to compress.

The results as they stand leave me more inclined to use muvsfunc SSIM as a 'definitive' implementation of the original code. Would be nice if there were an AVISynth(+) implementation of the muvsfunc SSIM filter.

Still don't understand though why the libvaf derived SSIM figures are so much higher. Is it down to difference in Gaussian kernel size or are the reported elementary SSIM scores being further weighted by the VMAF 'model' in some way (before the final VMAF calculation, that is) ?

As for MDSI - results to follow.

18th February 2019, 20:51	#12 \| Link
WorBry Registered User Join Date: Jan 2004 Location: Here, there and everywhere Posts: 1,197	Quite so ! Granted the tests were conducted with just one source clip (CrowdRun) - although a good one at that - high quality/complexity/motion/hard to compress. The results as they stand leave me more inclined to use muvsfunc SSIM as a 'definitive' implementation of the original code. Would be nice if there were an AVISynth(+) implementation of the muvsfunc SSIM filter. Still don't understand though why the libvaf derived SSIM figures are so much higher. Is it down to difference in Gaussian kernel size or are the reported elementary SSIM scores being further weighted by the VMAF 'model' in some way (before the final VMAF calculation, that is) ? As for MDSI - results to follow. __________________ Nostalgia's not what it used to be Last edited by WorBry; 20th February 2019 at 19:48.