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
vp9 [2023/04/08 21:52] – [vpxenc] beandogvp9 [2023/04/20 03:54] (current) – [ffmpeg] beandog
Line 14: Line 14:
 By default, ''vpxenc'' will use 2-pass method for encoding. By default, ''vpxenc'' will use 2-pass method for encoding.
  
-As far as I can tell, there's no default when using CQ mode. I don't know what variables it's using for default when doing a 1-pass encode.+To gain a CRF-type result, use ''--end-usage=cq --cq-level=<arg>'' format, and then a 1-pass encode ''--passes=1'' Using this, ''vpxenc'' uses a default CQ of 32. 
 + 
 +I get different encoding times on multiple runs, even though it's producing the exact same files, so watch out for that. 
  
-To gain a CRF-type result, use ''--end-usage=cq --cq-level=<arg>'' format, and then a 1-pass encode ''--passes=1'' 
 ==== HandBrake ==== ==== HandBrake ====
  
 By default, HandBrake uses a CQ of 22. By default, HandBrake uses a CQ of 22.
 +
 +HandBrake will only use 2-passes if a bitrate is set as well.
 +
 +==== ffmpeg ====
 +
 +You can use ''ffmpeg'' to get a deep level of output to see what it's doing, it uses the default CRF of 32:
 +
 +<code>
 +ffmpeg -loglevel debug -i sample.y4m -vcodec libvpx-vp9 sample.webm
 +</code>
 +
 +Relevant output:
 +
 +<code>
 +[libvpx-vp9 @ 0x55a6e613e3c0]   VP8E_SET_CPUUSED:             1
 +[libvpx-vp9 @ 0x55a6e613e3c0]   VP8E_SET_ARNR_MAXFRAMES:      0
 +[libvpx-vp9 @ 0x55a6e613e3c0]   VP8E_SET_ARNR_STRENGTH:       3
 +[libvpx-vp9 @ 0x55a6e613e3c0]   VP8E_SET_ARNR_TYPE:           3
 +[libvpx-vp9 @ 0x55a6e613e3c0]   VP8E_SET_STATIC_THRESHOLD:    0
 +[libvpx-vp9 @ 0x55a6e613e3c0]   VP8E_SET_CQ_LEVEL:            32
 +[libvpx-vp9 @ 0x55a6e613e3c0]   VP9E_SET_COLOR_SPACE:         0
 +[libvpx-vp9 @ 0x55a6e613e3c0]   VP9E_SET_COLOR_RANGE:         0
 +[libvpx-vp9 @ 0x55a6e613e3c0]   VP9E_SET_TARGET_LEVEL:        255
 +</code>

Trace:

Navigation