鍛戒護鍙傝冿細
sips -s format jpeg --out b.jpg a.png
鍐欎竴涓猵ng鎵歸噺杞崲jpg鐨勮剼鏈細cat ~/bin/png2jpg
#!/bin/bash
# convert png files to jpeg files
# usage: png2jpg <file>
for f in "$@"
do
sips -s format jpeg --out "${f%.*}.jpg" "$f"
done
cat ~/bin/jpg2png
#!/bin/bash
# convert jpeg files to png files
# usage: jpg2png <file>
for f in "$@"
do
sips -s format png --out "${f%.*}.png" "$f"
done
鉃?nbsp;~/Downloads $ png2jpg QQ20131008-*.png
/Users/adyliu/Downloads/QQ20131008-2.png
/Users/adyliu/Downloads/QQ20131008-2.jpg
/Users/adyliu/Downloads/QQ20131008-3.png
/Users/adyliu/Downloads/QQ20131008-3.jpg
/Users/adyliu/Downloads/QQ20131008-4.png
/Users/adyliu/Downloads/QQ20131008-4.jpg
鉃?nbsp;~/Downloads $ ll QQ*
-rw-r--r-- 1 adyliu staff 67K 10 8 15:43 QQ20131008-2.jpg
-rw-r--r--@ 1 adyliu staff 88K 10 8 15:31 QQ20131008-2.png
-rw-r--r-- 1 adyliu staff 23K 10 8 15:43 QQ20131008-3.jpg
-rw-r--r--@ 1 adyliu staff 34K 10 8 15:31 QQ20131008-3.png
-rw-r--r-- 1 adyliu staff 47K 10 8 15:43 QQ20131008-4.jpg
-rw-r--r--@ 1 adyliu staff 44K 10 8 15:31 QQ20131008-4.png
鍙傝冭祫鏂?
- sips doc
- Resizing images using the command line
- Shell Parameter Expansion
- Extract filename and extension in bash
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