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But how good is the quality? I watched the Mozilla Demo and at the 30 second mark the "Robot Hand" distorted the green trees in the Background. Even at 720p@800
by _up 9y ago
But how good is the quality? I watched the Mozilla Demo and at the 30 second mark the "Robot Hand" distorted the green trees in the Background. Even at 720p@800kbps. Haven't noticed this with other hevc encodes at similar bitrates.
https://demo.bitmovin.com/public/firefox/av1/ https://demo.bitmovin.com/public/firefox/av1/
- clouddrover 9y agoBitmovin's comparison: https://bitmovin.com/av1-multi-codec-dash-dataset/ https://bitmovin.com/av1-multi-codec-dash-dataset/ MSU's comparison from a couple of months ago: http://www.streamingmedia.com/Articles/News/Online-Video-News/AV1-Beats-VP9-and-HEVC-on-Quality-if-Youve-Got-Time-says-Moscow-State-122945.aspx http://www.streamingmedia.com/Articles/News/Online-Video-New... The x265 guys complained about the recent MSU test: http://www.x265.org/x265-incorrectly-represented-msus-2017-codec-comparison/ http://www.x265.org/x265-incorrectly-represented-msus-2017-c...
- robert_foss 9y agoJudging a codec by any one single frame isn't really good enough. The samples _and_ performance metrics used have to be quite varied.
- fwip 9y agoThat is a really weird distortion effect. I don't know if I would have noticed without you pointing it out, but it almost made me feel seasick.
- TD-Linux 9y agoActually had to double check this to make sure it wasn't in the sources. It seems the the encoder basically sees the trees as only having a small difference, but really visually it's quite large. The solution is a better distortion function in the encoder - libaom's is simple but dumb. (luckily this means no decoder or format changes)