To clarify, in the options used for the --hevc-aq tests, 240p, 360p, 480p test results were generated from the same (1080p) source video. I did not test for 720p because it takes a long time for that to encode.
So, if the test video was the Solo movie trailier, called solo.mkv, then for --hevc-aq ffmpeg -i solo.mkv -s 424x240 -c:v hevc -crf 28 -preset:v faster -x265-params 'log-level=none:hevc-aq=1' -an -y output.mkv and --no-hevc-aq ffmpeg -i solo.mkv -s 424x240 -c:v hevc -crf 28 -preset:v faster -x265-params 'log-level=none:hevc-aq=0' -an output.mkv ,and so on for 360p ( -s 640x360) and 480p ( -s 854x480). All source videos were 1080p. I verified that the --hevc-aq was actually being enabled(/disabled) using mediainfo. Of course, the pixellation in --hevc-aq output is a dead giveaway, so one does not really need to use mediainfo. I must also mention that though the bit rate for the default settings (--no-hevc-aq,crf=28,preset=medium) for 3.0 is higher by about 10-15% , the visual quality is definitely better. Again, I cant quantify this. But it is always possible to get better visual quality by sacrificing bitrate. _______________________________________________ x265-devel mailing list [email protected] https://mailman.videolan.org/listinfo/x265-devel
