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I thought SSIM was not a very good metric for measuring quality? My impression has always been that the VP9 encoders optimize for these simple “objective qualit
by cycrutchfield 7y ago
I thought SSIM was not a very good metric for measuring quality? My impression has always been that the VP9 encoders optimize for these simple “objective quality metrics”, therefore they do well on those metrics. But encoders like x264 don’t, so they do not do as well on those metrics.
- ahartmetz 7y agoThis is true according to my observations. And really, nobody cares about "objective" quality (except for quick feedback during development, I guess). It has to look good.
- clouddrover 7y agoVP9 outperforms H.264 on both objective and subjective metrics: http://www.compression.ru/video/codec_comparison/hevc_2018/ http://www.compression.ru/video/codec_comparison/hevc_2018/ http://www.compression.ru/video/codec_comparison/hevc_2018/#subjective_report http://www.compression.ru/video/codec_comparison/hevc_2018/#... Their subjective testing methodology: http://www.compression.ru/video/codec_comparison/hevc_2018/pdf/subjective_comparison_method.pdf http://www.compression.ru/video/codec_comparison/hevc_2018/p...