假设压出来高crf值的1080p视频和压出来的低crf值的720p视频文件大小一样 都为原视频的三分之一大小

这是我用shanaencoder的压制参数 感觉效果不错

-f mp4
-c:v libx265 -x265-params me=hex:merange=38:subme=3:max-merge=3:min-keyint=1:keyint=360:scenecut=40:cbqpoffs=-2:crqpoffs=-2:open-gop=0:rc-lookahead=60:bframes=6:lookahead-slices=4:weightb=1:ref=3:aq-mode=2:aq-strength=0.8:qg-size=8:no-strong-intra-smoothing=1:no-sao=1:selective-sao=0:deblock=-1,-1:ctu=32:rd=4:psy-rd=1.80:rdoq-level=2:psy-rdoq=1.00:rskip=1 -preset medium -tune:v none -crf 20.0
-c:a libfdk_aac -ac 2 -b:a 80k
-sn -map_metadata -1 -map_chapters -1 -libx265main10