Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
vp8 [2020/06/10 05:11] – beandogvp8 [2023/04/20 04:17] (current) – [Notes] beandog
Line 15: Line 15:
 For ''ffmpeg'', use ''-crf'' with your number and ''-b:v 0'' is required. 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.+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. <del>I think it's using libavcodec to do crf=X and then b:v of 0.</del>
  
 ==== Encoding Quality ==== ==== Encoding Quality ====
Line 21: Line 21:
 With the defaults, vpxenc will create low quality encodes, its bitrate is too low. It will have to be bumped up to get some good quality. With the defaults, vpxenc will create low quality encodes, its bitrate is too low. It will have to be bumped up to get some good quality.
  
-When using ffmpeg, pass ''-b 0'' (bitrate 0) so that it doesn't limit bitrate. Also use a CRF. For very high quality encodes, I'd say around 6 to 8.+SETTING crf and b:v 0 only works on VP9, DESPITE what the ffmpeg docs say. 
 +<del>When using ffmpeg, pass ''-b 0'' (bitrate 0) so that it doesn't limit bitrate. Also use a CRF. For very high quality encodes, I'd say around 6 to 8.
  
 <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>+</code></del>
  
-HandBrake:+HandBrake's default CRF for VP8 is 22.
  
 <code> <code>
-HandBrakeCLI -i video.y4m -e VP8 -q 6 -o video.mkv+HandBrakeCLI -i video.y4m -e VP8 -q 18 -o video.mkv
 </code> </code>

Trace:

Navigation