Differences

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--- vp8 [2020/06/09 23:11]
beandog
+++ vp8 [2023/04/19 22:17] (current)
beandog [Notes]
@@ Line 15: / Line 15: @@
 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 ====
@@ 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.
-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>
 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>
-HandBrakeCLI -i video.y4m -e VP8 -q 6 -o video.mkv
+HandBrakeCLI -i video.y4m -e VP8 -q 18 -o video.mkv
 </code>

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