poprhythm
2ed392d466
Replace pixel dimension check with a JPEG comment check. Processed files are marked with 'magick:resize=8mp,quality=85,sampling=4:2:0' via -set comment after -strip, so future runs skip them entirely.
33 lines
1.1 KiB
Bash
Executable File
33 lines
1.1 KiB
Bash
Executable File
#!/bin/bash
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#
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# images_resize Resizing large JPGs in current directory
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# Based on: https://shkspr.mobi/blog/2016/12/converting-rar-to-zip-in-linux/
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#
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# Usage: xxx.sh
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echo "Resizing large JPGs in $(pwd)"
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MAX_PIXELS=8000000
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MAGICK_COMMENT="magick:resize=8mp,quality=85,sampling=4:2:0"
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find . -regextype posix-egrep -regex ".*\.(jpg|JPG|JPEG|jpeg)$" -print0 | while IFS= read -r -d '' f
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do
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# Skip files already processed with these parameters
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COMMENT=$(~/Applications/magick identify -format "%c" "$f" 2>/dev/null)
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if [[ "$COMMENT" == "$MAGICK_COMMENT" ]]; then
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echo "Skipping $f: already processed"
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continue
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fi
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# Get file size before resizing
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SIZE_BEFORE=$(stat -f%z "$f" 2>/dev/null || stat -c%s "$f" 2>/dev/null)
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~/Applications/magick "$f" -resize "${MAX_PIXELS}@@\>" -sampling-factor 4:2:0 -strip -quality 85% -set comment "$MAGICK_COMMENT" "$f"
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# Get file size after resizing
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SIZE_AFTER=$(stat -f%z "$f" 2>/dev/null || stat -c%s "$f" 2>/dev/null)
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# Display before/after sizes
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echo "Resized $f: $(numfmt --to=iec-i --suffix=B $SIZE_BEFORE) -> $(numfmt --to=iec-i --suffix=B $SIZE_AFTER)"
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done
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