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Old 2015-08-15, 11:23   #6
VictordeHolland
 
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"Victor de Hollander"
Aug 2011
the Netherlands

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The same 1080p film encoded with x264 and x265 (half the size) I find the x264 has more visual sharpnes/details. With the same bitrate, x265 looks better (obviously). So I would say its closer to 0.7-0.8 the size of x264 for the same visual sharpness on 1080p content. With 4k, UHD, 2160p (or however you want to call) it might be closer to 0.5 as there are more pixels to encode and the algorithms of x265 work more efficient.

I still mainly use x264, because my smartphone/TV/tablet have hardware accelleration for it and storage is very cheap.
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