JPEG-XL transcoding scripts

diff --git a/bin/bin/transcode-jp2.sh b/bin/bin/transcode-jp2.sh
new file mode 100755 (executable)
index 0000000..97c1f45
--- /dev/null
+++ b/bin/bin/transcode-jp2.sh
@@ -0,0 +1,7 @@
+#!/bin/sh -e
+
+ppm=${1%.jp2}.ppm
+trap "rm -f $ppm" HUP PIPE INT QUIT TERM EXIT
+opj_decompress -i $1 -o $ppm
+cjxl $ppm ${1%.jp2}.jxl -q 100 -e 9 -p
+rm $1

diff --git a/bin/bin/transcode-jpg.sh b/bin/bin/transcode-jpg.sh
new file mode 100755 (executable)
index 0000000..882cce1
--- /dev/null
+++ b/bin/bin/transcode-jpg.sh
@@ -0,0 +1,7 @@
+#!/bin/sh -e
+
+trap "rm -f \"$1\".jpegtran.jpg" HUP PIPE INT QUIT TERM EXIT
+jpegtran -optimize -progressive -perfect -copy all "$1" > "$1".jpegtran.jpg
+cjxl "$1".jpegtran.jpg "${1%.*}.jxl" -q 100 -e 9
+[ -s "${1%.*}.jxl" ]
+rm "$1"