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x264_preset_reference [2021/10/17 19:34] beandog removed |
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- | ==== x264 preset reference ==== | ||
- | * [[x264]] | ||
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- | [[x264]] is well documented, and I like using it, but sometimes I want to see all the flags that a preset is using, compared to the defaults. So, I put this little table together to work as a reference. I used [[mediainfo]] to read the x264 encoding options from the video. Since x264 doesn't write *all* of the encoding settings (that I can see, partitions is an example), this may not be 100% accurate. | ||
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- | You can duplicate my results if you like. The source video was nyan cat jazz, which I downloaded using youtube-dl, converted to [[YUV4MPEG2]] using [[libav]], then used x264 encoder to encode the raw video into a [[Matroska]] container. | ||
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- | <code> | ||
- | $ youtube-dl http://www.youtube.com/watch?v=AaEmCFiNqP0 | ||
- | # start at 15 seconds, encode 5 seconds, ignore audio | ||
- | $ avconv -i AaEmCFiNqP0.flv -ss 15 -t 5 -an video.y4m | ||
- | $ x264 --preset ultrafast -o x264_preset_ultrafast.mkv video.y4m | ||
- | $ mediainfo x264_preset_ultrafast.mkv | ||
- | </code> |