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vp9 [2023/04/08 15:54] beandog |
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. | 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. | ||
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| By default, HandBrake uses a CQ of 22. | By default, HandBrake uses a CQ of 22. | ||
| - | HandBrake willy only use 2-passes if a bitrate is set as well. | + | HandBrake will only use 2-passes if a bitrate is set as well. |
| ==== ffmpeg ==== | ==== ffmpeg ==== | ||
| - | You can use ''ffmpeg'' to get a deep level of output to see what it's doing: | + | You can use ''ffmpeg'' to get a deep level of output to see what it's doing. It sets a default CRF of 32. |
| - | <pre> | + | <code> |
| - | ffmpeg -i sample.y4m -vcodec libvpx-vp9 sample.webm | + | ffmpeg -loglevel debug -i sample.y4m -vcodec libvpx-vp9 sample.webm |
| - | </pre> | + | </code> |
| Relevant output: | Relevant output: | ||
