Sorry for the late reply. The command line was :
ffmpeg -i input.mkv -c:v hevc -crf 28 -preset:v faster -an output.mkv The reason for using 'faster' was to reduce the encode time. I have seen a similar relationaship (--hevc-aq producing smaller encodes than --no-hevc-aq) with both the 'medium' and 'fast' presets. There seems to have been an improvement in the latest git as fast as quality in --hevc-aq in concerned. Unfortunately, this is more of a subjective thing, since SSIM does not really correlate perfectly with perceived visual quality for me. btw, in the links I supplied, both the git and release versions have changed (to 3.0 for release), so you will have to use x265 2.8 from elsewhere now. thanks On 2/4/19, [email protected] <[email protected]> wrote: > Send x265-devel mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > https://mailman.videolan.org/listinfo/x265-devel > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of x265-devel digest..." > > > Today's Topics: > > 1. Re: information about --hevc-aq follow up (Kalyan Goswami) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Mon, 4 Feb 2019 15:34:41 +0530 > From: Kalyan Goswami <[email protected]> > To: Development for x265 <[email protected]> > Subject: Re: [x265] information about --hevc-aq follow up > Message-ID: > <CAKmKOQRF3q9oxcs9P8LYxKsm5=OZsjrJ3-oi64=crnrkx7g...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > Hi, > > We are looking into this problem. Would you please share the exact CLI > options that you have used for this test? > > Thanks, > Kalyan Goswami, PhD > Video Architect @ MulticoreWare > http: <http://www.multicorewareinc.com/>//www.multicorewareinc.com > <http://www.multicorewareinc.com/> > +91 9884989331 > > > On Sun, Jan 27, 2019 at 8:11 PM nalla shanaha <[email protected]> > wrote: > >> Following on from the previous email, here are results of some testing. >> >> The files are 1080p videos from youtube >> >> 1) mortal engines movie trailer (youtube.com/watch?v=IRsFc2gguEg) >> 2) polar movie trailer (youtube.com/watch?v=oMHwRal-AR8) >> 3) solo movie trailer (youtube.com/watch?v=XRRNxIZfjHA) >> >> All ratio are normalized taking x265 2.8+74-fd517ae68f93 as base >> x265 3.0 is version 3.0_RC+10-42b51d791a34 >> >> x265 2.8 is from >> >> https://johnvansickle.com/ffmpeg/releases/ffmpeg-release-amd64-static.tar.xz >> x265 >> <https://johnvansickle.com/ffmpeg/releases/ffmpeg-release-amd64-static.tar.xzx265> >> 3.0 is from >> https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-amd64-static.tar.xz >> >> all videos were encoded with 1.77 aspect ratio, i.e 424x240, >> 640x360,854x480 from the 1080p source videos >> >> --preset faster --crf 28 was used in all cases. >> >> >> >> +----------+------------------------------------------------------------------+ >> | file | bit rate ratios (x265 2.8 is 1x) >> | >> >> +----------+------------------------------------------------------------------+ >> | 1)Polar | >> +--------------+--------------+------------+-------------------+ | >> | | | video height | --no-hevc-aq | --hevc-aq | percent >> reduction | | >> | | >> +--------------+--------------+------------+-------------------+ | >> | | | 240 | 1.231 | 0.725 | 41.1 >> | | >> | | | 360 | 1.115 | 0.649 | 41.8 >> | | >> | | | 480 | 1.104 | 0.679 | 38.5 >> | | >> | | >> +--------------+--------------+------------+-------------------+ | >> | 2)Mortal | >> +--------------+--------------+------------+-------------------+ | >> | | | video height | --no-hevc-aq | --hevc-aq | percent >> reduction | | >> | | >> +--------------+--------------+------------+-------------------+ | >> | | | 240 | 1.164 | 0.633 | 45.6 >> | | >> | | | 360 | 1.149 | 0.681 | 40.7 >> | | >> | | | 480 | 1.079 | 0.668 | 38.1 >> | | >> | | >> +--------------+--------------+------------+-------------------+ | >> | 3)Solo | >> +--------------+--------------+------------+-------------------+ | >> | | | video height | --no-hevc-aq | --hevc-aq | percent >> reduction | | >> | | >> +--------------+--------------+------------+-------------------+ | >> | | | 240 | 1.088 | 0.711 | 34.7 >> | | >> | | | 360 | 1.046 | 0.741 | 29.1 >> | | >> | | | 480 | 0.995 | 0.739 | 25.8 >> | | >> | | >> +--------------+--------------+------------+-------------------+ | >> >> +----------+------------------------------------------------------------------+ >> >> >> +----------+----------------------------------------------+ >> | file | speed ratios (x265 2.8 is 1x) | >> +----------+----------------------------------------------+ >> | 1)Polar | +--------------+--------------+------------+ | >> | | | video height | --no-hevc-aq | --hevc-aq | | >> | | +--------------+--------------+------------+ | >> | | | 240 | 0.936 | 0.147 | | >> | | | 360 | 0.998 | 1.035 | | >> | | | 480 | 1.013 | 1.055 | | >> | | +--------------+--------------+------------+ | >> | 2)Mortal | +--------------+--------------+------------+ | >> | | | video height | --no-hevc-aq | --hevc-aq | | >> | | +--------------+--------------+------------+ | >> | | | 240 | 0.917 | 1.008 | | >> | | | 360 | 0.966 | 1.077 | | >> | | | 480 | 0.969 | 1.037 | | >> | | +--------------+--------------+------------+ | >> | 3)Solo | +--------------+--------------+------------+ | >> | | | video height | --no-hevc-aq | --hevc-aq | | >> | | +--------------+--------------+------------+ | >> | | | 240 | 0.944 | 0.998 | | >> | | | 360 | 1.017 | 1.044 | | >> | | | 480 | 0.989 | 1.033 | | >> | | +--------------+--------------+------------+ | >> +----------+----------------------------------------------+ >> _______________________________________________ >> x265-devel mailing list >> [email protected] >> https://mailman.videolan.org/listinfo/x265-devel >> > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://mailman.videolan.org/pipermail/x265-devel/attachments/20190204/9f5413fa/attachment-0001.html> > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > x265-devel mailing list > [email protected] > https://mailman.videolan.org/listinfo/x265-devel > > > ------------------------------ > > End of x265-devel Digest, Vol 69, Issue 1 > ***************************************** > _______________________________________________ x265-devel mailing list [email protected] https://mailman.videolan.org/listinfo/x265-devel
