4646b00220
adopted by many Linux distributions as well as FreeBSD ports:
o jpegtran: add "-perfect" switch:
Fail if there are non-transformable edge blocks.
o jpegtran: add "-crop" switch:
Crop to a rectangular subarea.
o jpegtran: correct EXIF handling.
o jpegexiforient: Get and set the Exif Orientation Tag.
o exifautotran: Transforms Exif files so that Orientation becomes 1.
Suggested by dzoe on #NetBSD IRCNet.
38 lines
804 B
Bash
38 lines
804 B
Bash
#! /bin/sh
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#
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# Based on http://www.jpegclub.org/exifautotran.txt
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#
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if [ "$#" = "0" ]
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then
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cat << EOF 1>&2
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usage: exifautotran [list of files]
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Transforms Exif files so that Orientation becomes 1
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EOF
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exit 1
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fi
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for i
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do
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case `jpegexiforient -n "$i"` in
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1) transform="";;
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2) transform="-flip horizontal";;
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3) transform="-rotate 180";;
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4) transform="-flip vertical";;
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5) transform="-transpose";;
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6) transform="-rotate 90";;
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7) transform="-transverse";;
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8) transform="-rotate 270";;
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*) transform="";;
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esac
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if test -n "$transform"; then
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echo Executing: jpegtran -copy all $transform $i
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jpegtran -copy all $transform "$i" > tempfile
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if test $? -ne 0; then
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echo Error while transforming $i - skipped.
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else
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rm "$i"
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mv tempfile "$i"
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jpegexiforient -1 "$i" > /dev/null
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fi
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fi
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done
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