install on ubuntu 16.04

$ sudo apt-get install autoconf automake libtool nasm make pkg-config

$ git clone [email protected]:mozilla/mozjpeg.git $ cd mozjpeg $ autoreconf -fiv $ ./configure $ make $ sudo make install

./configure: line 13812: syntax error near unexpected token `libpng,'

とか出たときは、pkg-configを入れてなくてエラーが起きた
再度、autoreconfからやり直してうまくいった

installed in /opt/mozjpeg/bin

$ ln -s /opt/mozjpeg/bin/* /usr/local/bin

$ jpegtran file.jpg > out/file.jpg

sample shell

#!/bin/sh

OUTDIR="./out"
FILES=`find . -maxdepth 1 -type f -iname '*.jpg'`
echo $FILES

echo `pwd`

mkdir -p $OUTDIR
for file in $FILES; do
  echo $file
  OUTFILE="$OUTDIR/$file"
  jpegtran -optimize -progressive -copy none "$file" > "$OUTFILE"
  #jpegtran -arithmetic -progressive -arithmetic -copy all "$file" > "$OUTFILE"
done

echo 'done'