Quote:
Originally Posted by benwaggoner
It might be worth redoing those tests with a more recent x265 and perhaps --hevc-aq. I suspect the gap was somewhat caused by bugs and is likely somewhat smaller now.
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Same as last time, source is 25Mbps Bluray compatable x264 file encoded from the 4k y4m version of tos.
encode (x265 3.4+9):
Code:
"ffmpeg.exe" -i "tos_sample.1080p.x264.mp4" -an -f yuv4mpegpipe -strict -1 - | "x265.exe" --y4m --input-depth 8 --output-depth 10 --preset slow --profile main10 --level-idc 41 --bitrate 3000 --pass 1 --keyint 240 --min-keyint 24 --colorprim bt709 --transfer bt709 --colormatrix bt709 --range limited - -o NUL
"ffmpeg.exe" -i "tos_sample.1080p.x264.mp4" -an -f yuv4mpegpipe -strict -1 - | "x265.exe" --y4m --input-depth 8 --output-depth 10 --preset slow --profile main10 --level-idc 41 --bitrate 3000 --pass 2 --keyint 240 --min-keyint 24 --colorprim bt709 --transfer bt709 --colormatrix bt709 --range limited - -o "main10_3mbps.hevc"
"ffmpeg.exe" -i "tos_sample.1080p.x264.mp4" -an -f yuv4mpegpipe -strict -1 - | "x265.exe" --y4m --input-depth 8 --output-depth 8 --preset slow --level-idc 41 --bitrate 3000 --pass 1 --keyint 240 --min-keyint 24 --colorprim bt709 --transfer bt709 --colormatrix bt709 --range limited - -o NUL
"ffmpeg.exe" -i "tos_sample.1080p.x264.mp4" -an -f yuv4mpegpipe -strict -1 - | "x265.exe" --y4m --input-depth 8 --output-depth 8 --preset slow --level-idc 41 --bitrate 3000 --pass 2 --keyint 240 --min-keyint 24 --colorprim bt709 --transfer bt709 --colormatrix bt709 --range limited - -o "main_3mbps.hevc"
decode:
Code:
ffms2("main10_3mbps.mp4")
#ffms2("main_3mbps.mp4")
ConvertToRGB24(matrix="Rec709")
Spline36Resize(3840,2160)
crop(0,280,-1920,-800)
frame exported using avspmod
Samples:
https://ibb.co/0Q0CsmN
https://ibb.co/558ZMth
Big difference, actually much bigger then i anticipated.
This one is interesting as well, big difference in the white areas, and the 10bit version is actually introducing some issues on those wholes on that black thing compared to the 8bit version.
https://ibb.co/yFsyc47
https://ibb.co/j5DcHJQ
Overall main10 seems to try to keep more detail in flat areas.