85 lines
2.0 KiB
Bash
Executable File
85 lines
2.0 KiB
Bash
Executable File
#!/bin/bash
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#
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# zip_images_resize Resizing large JPGs in ZIPs
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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 file [file ...]
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echo "Resizing large JPGs in ZIPs"
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# Use RAM disk for temporary files.
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WORKDIR="/dev/shm/"
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# Cleanup function
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cleanup_temp() {
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if [ -n "$TEMPDIR" ] && [ -d "$TEMPDIR" ]; then
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rm -r "$TEMPDIR"
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fi
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}
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for INFILE in "$@"; do
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# Absolute path to old file
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#OLDFILE=$(realpath "${INFILE}")
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OUTFILE="${INFILE%.zip}-compress.zip"
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# Remove output file if it already exists
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if [ -e "${OUTFILE}" ]; then
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rm "${OUTFILE}"
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fi
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# Set name for the temp dir. This directory will be created under WORKDIR
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TEMPDIR=$(mktemp -p "$WORKDIR" -d)
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# Set up cleanup trap
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trap cleanup_temp EXIT INT TERM
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# Create a temporary folder for unzipped files
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echo "Extracting $INFILE"
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# extract files from zip
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if ! unzip "$INFILE" -d "$TEMPDIR"; then
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echo "Error: Failed to extract $INFILE"
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cleanup_temp
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continue
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fi
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# resize
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#convert '${TEMPDIR}/*.jpg' -set filename:fn '%[basename]' -resize 2800000@@\> -sampling-factor 4:2:0 -strip -quality 85% -colorspace RGB '%[filename:fn].jpg'
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if ! pushd "$TEMPDIR" > /dev/null; then
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echo "Error: Failed to change to temp directory"
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cleanup_temp
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continue
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fi
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~/images_resize.sh
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popd > /dev/null
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# Zip the files with no compression
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pushd "$TEMPDIR" > /dev/null
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if ! 7z a -tzip -mx=0 "$OUTFILE" ./*; then
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echo "Error: Failed to create ZIP"
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popd > /dev/null
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cleanup_temp
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continue
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fi
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popd > /dev/null
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# Alternative. MUCH SLOWER, but better compression
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# 7z a -mm=Deflate -mfb=258 -mpass=15 -r "$NEWNAME" *
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# Preserve file modification time
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touch -r "$INFILE" "$OUTFILE"
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rm "$INFILE"
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mv "$OUTFILE" "$INFILE"
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# Delete the temporary directory
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cleanup_temp
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trap - EXIT INT TERM
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# OPTIONAL. Safe-remove the old file
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#gio trash "$OLDFILE"
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done
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echo "Conversion Done"
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