So cool, thank you
On Wed, Aug 20, 2014 at 11:32 AM, Luke Davis <[email protected]> wrote: > On Wed, 20 Aug 2014, Qianliang Zhang wrote: > > You know, while doing x264 encode, -preset can do a good job. Current >> presets in descending order of speed are: ultrafast, superfast, veryfast, >> faster, fast, medium, slow, slower, veryslow, placebo. But what are these >> values stand for? What parameters are used and set in these presets? >> >> Could anybody explain? Appreciate. >> > > From x264 --fullhelp: > > --preset <string> Use a preset to select encoding settings > [medium] > Overridden by user settings. > - ultrafast: > --no-8x8dct --aq-mode 0 --b-adapt 0 > --bframes 0 --no-cabac --no-deblock > --no-mbtree --me dia --no-mixed-refs > --partitions none --rc-lookahead 0 > --ref 1 > --scenecut 0 --subme 0 --trellis 0 > --no-weightb --weightp 0 > - superfast: > --no-mbtree --me dia --no-mixed-refs > --partitions i8x8,i4x4 --rc-lookahead 0 > --ref 1 --subme 1 --trellis 0 > --weightp 1 > - veryfast: > --no-mixed-refs --rc-lookahead 10 > --ref 1 --subme 2 --trellis 0 > --weightp 1 > - faster: > --no-mixed-refs --rc-lookahead 20 > --ref 2 --subme 4 --weightp 1 > - fast: > --rc-lookahead 30 --ref 2 --subme 6 > --weightp 1 > - medium: > Default settings apply. > - slow: > --b-adapt 2 --direct auto --me umh > --rc-lookahead 50 --ref 5 --subme 8 > - slower: > --b-adapt 2 --direct auto --me umh > --partitions all --rc-lookahead 60 > --ref 8 --subme 9 --trellis 2 > - veryslow: > --b-adapt 2 --bframes 8 --direct auto > --me umh --merange 24 --partitions all > --ref 16 --subme 10 --trellis 2 > --rc-lookahead 60 > - placebo: > --bframes 16 --b-adapt 2 --direct auto > --slow-firstpass --no-fast-pskip > --me tesa --merange 24 --partitions all > --rc-lookahead 60 --ref 16 --subme 11 > --trellis 2 > _______________________________________________ > ffmpeg-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user
