| Open Review Initiative | ORI Encoding Guidelines | Test Indexes |
AV1 Libaom RF vs. cpu-used Comparison realtime enabled
This is a comparison of different CRF values against cpu-used for the libaom av1 encoder. The -cpu-used flag defaults to 1, which gives a very slow but efficient encode. We are finding values of at least 4 still give an excellent quality, but quite a bit faster (although still significantly slower than other encoders. Values of 5 may also be worth considering. In this case we are encoding to 422. If you are ok with 420, do use svt-av1, which is significantly faster.
Test DataThis allows you pick which media was encoded, and then compare the results of the encode. What you are looking at is a YCrCb diff x20 which allows you to see significant differences. See Instructions for usage.
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Media Selection
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Show YCrCb Difference between Source and encoded media.
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Left Image
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Right Image
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80%
How to Use:
- Select two images/videos from the dropdowns or upload your own files
- Drag the white divider left and right to compare different parts of the media
- Use the zoom slider to zoom in/out of both media simultaneously
- Use mouse wheel over the comparison area to zoom in/out quickly
- Click and drag within the comparison area to pan around zoomed media
- For videos: use the time slider to scrub through footage and play/pause button
- Media is automatically centered and scaled to fit the comparison area