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Daniel Novomeský authored
Enable decoder to use more threads. 8bit YUV->RGB conversion is significantly faster when AVIF_RGB_FORMAT_RGBA format is used, because libavif can use libyuv to perform conversion quickly. Prefer faster AVIF_CHROMA_UPSAMPLING_FASTEST when decoding animation. Encoder speed changed from to 8 to 7. Recent AV1 encoders got faster, so it is OK to switch to better compression quality. Remove obsolete image/avif-sequence mime-type as it was merged with image/avif.
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