用shanaencoder压了五个视频文件，参数是
-f mkv
-c:v libx265 -x265-params min-keyint=5:scenecut=50:open-gop=0:rc-lookahead=60:lookahead-slices=0:me=hex:subme=2:merange=57:ref=3:max-merge=3:no-strong-intra-smoothing=1:no-sao=1:selective-sao=0:deblock=-3,-3:ctu=32:rdoq-level=2:psy-rdoq=1.0:rskip=2:early-skip=0 -preset medium -pix_fmt yuv420p10le -tune:v none -crf 20.0
-c:a libfdk_aac -b:a 384k -ac 6
-map 0:s -c:s copy
-map_metadata -1 -map_chapters -1
压缩后进行文件大小比价，都是几百兆，精确到后面的一位小数点都是相同的
然后肉眼看视频画质也没看出明显却别，但是极慢很慢啊

手机贴吧app看，你参数有几个地方没空格，应该是这样的
-f mkv
-c:v libx265 -x265-params min-keyint=5:scenecut=50:open-gop=0:rc-lookahead=60:lookahead-slices=0:me=hex:subme=2:merange=57:ref=3:max-merge=3:no-strong-intra-smoothing=1:no-sao=1:selective-sao=0:deblock=-3,-3:ctu=32:rdoq-level=2:psy-rdoq=1.0:rskip=2:early-skip=0 -preset medium -pix_fmt yuv420p10le -tune:v none -crf 20.0
-c:a libfdk_aac -b:a 384k -ac 6
-map 0:s -c:s copy
-map_metadata -1 -map_chapters -1

调了几个参数以后就不是medium了