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vp9 [2023/04/08 15:52] beandog [vpxenc] |
vp9 [2023/04/19 21:53] beandog [ffmpeg] |
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| 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 sets a 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> | ||
