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x264_preset_reference [2021/10/17 19:23]
beandog
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-==== x264 preset reference ==== 
  
-  * [[x264]] 
- 
-[[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. 
- 
-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. 
- 
-<​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>​ 

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