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vp8 [2020/06/09 10:11] – beandogvp8 [2020/06/10 05:11] – beandog
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   * [[https://trac.ffmpeg.org/wiki/Encode/VP8|ffmpeg wiki: Encode VP8]]   * [[https://trac.ffmpeg.org/wiki/Encode/VP8|ffmpeg wiki: Encode VP8]]
   * [[http://ffmpeg.org/ffmpeg-all.html#libvpx|ffmpeg libvpx documentation]]   * [[http://ffmpeg.org/ffmpeg-all.html#libvpx|ffmpeg libvpx documentation]]
 +
 +==== Notes ====
 +
 +Both VP8 and [[VP9]] are a bit confusing on how to get good encodes related to specific levels of quality, when using the documentation and ''vpxenc'' help output as references.
 +
 +In it's simplest approach, if using ''vpxenc'', use ''max-q'' as the target CRF -- the encoder won't drop quality below that level (starts at 0, ends at 63).
 +
 +For ''ffmpeg'', use ''-crf'' with your number and ''-b:v 0'' is required.
 +
 +For HandBrake, use ''-q'' with your CRF. I can't tell from docs or the code if it's passing anything about min-q and max-q to the encoder, but I don't think it is. I think it's using libavcodec to do crf=X and then b:v of 0.
  
 ==== Encoding Quality ==== ==== Encoding Quality ====
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 <code> <code>
 ffmpeg -i video.y4m -vcodec libvpx -crf 6 -b:v 0 -y video.mkv ffmpeg -i video.y4m -vcodec libvpx -crf 6 -b:v 0 -y video.mkv
 +</code>
 +
 +HandBrake:
 +
 +<code>
 +HandBrakeCLI -i video.y4m -e VP8 -q 6 -o video.mkv
 </code> </code>

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