Major upgrade: 10-bit encoding, new quality range
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RGB images are encoded using 10-bit depth. This is surprisingly, a win for speed, file size, and quality. RGBA images still use 8-bit depth, because Safari doesn't seem to support alpha channel in 10-bit images.
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The
--quality
setting has changed to match behavior of quality settings in JPEG and WebP encoders. Most reasonable values are now between 70-80.