Convert jpg to png 1magick ${input}.jpg ${output}.png Reduce jpg size by reducing quality 1quality=70 2magick ${input}.jpg -quality ${quality} ${output}.jpg Reduce png size 1magick ${input}.png png8:${output}.png Invert jpg colours 1magick ${input}.jpg ${output}.jpg -negate Make jpg smaller 1magick ${input}.jpg -resize …

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