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TIL: sips for Image Manipulation
I’ve been helping the Squeeze update her website to show new work, a lot of which requires me to rightsize the image files she produces as part of her practice. Normally not much of a problem but occasional enormous TIFF files cause all the tools I have to stutter and fail. Fearing I might have to install ImageMagick or similar, I cast around online and found Use sips to quickly, easily—and freely—convert image files. Bingo!
I did one run of a straight TIFF to JPEG conversion and it worked, but the JPEG was still too large. So I actually read sips help and discovered the -Z option to specify a size in pixels for the largest dimension.
sips -s format jpeg -s formatOptions 80 -Z 1920 "input.tiff" --out "output.jpeg"
Took me down from 251Mb to 862Kb in no time flat. Very good to know.