Mine

#/bin/sh
# $1 = input, $2 = output, $3 = video bit rate, $4 = audio bitrate
# $5 = display width, $6 = h aspect ratio, $7 = v aspect ratio
# $8 = croptop (unscaled) $9 = cropbottom (unscaled) 
#  video  vbitr
# 640x480 768
# 640x352 768
# 320x240 320
# 320x176 256

if [ "$1" = "" ]
then
	echo "usage: ipodenc-bath input_directory"
	exit 0
fi

VBITR=960
ABITR=160
VWIDTH=512
HASPR=16
VASPR=9
VHIGHT=$(echo "$VWIDTH/$HASPR*$VASPR" | bc)
CROPT=0
CROPB=0
echo video bitrate: $VBITR
echo audio bitrate: $ABITR
echo video size: "$VWIDTH"x"$VHIGHT"
echo aspect ratio: $HASPR:$VASPR
echo unscaled crop "(top)": $CROPT
echo unscaled crop "(bottom)": $CROPB

for i in $( ls "$1" ); do
        IFILE="$1""$i"
        OFILE="$i".mp4

ffmpeg -an -pass 1 -i "$IFILE" -deinterlace -croptop "$CROPT" -cropbottom "$CROPB" -s "$VWIDTH"x"$VHIGHT" -aspect "$HASPR":"$VASPR" -vcodec h264 -flags +loop -cmp +chroma -partitions +parti4x4+partp4x4+partp8x8+partb8x8 -subq 7 -trellis 2 -refs 5 -coder 0 -me_range 24 -g 300 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -b "$VBITR"k -minrate 100k -maxrate 2M -bufsize 10M -rc_eq 'blurCplx^(1-qComp)' -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -level 30 "$OFILE"

rm "$OFILE"

ffmpeg -i "$IFILE" -acodec aac -ab "$ABITR" -ar 48000 -pass 2 -deinterlace -croptop "$CROPT" -cropbottom "$CROPB" -s "$VWIDTH"x"$VHIGHT" -aspect "$HASPR":"$VASPR" -vcodec h264 -flags +loop -cmp +chroma -partitions +parti4x4+partp4x4+partp8x8+partb8x8 -subq 7 -trellis 2 -refs 5 -coder 0 -me_range 24 -g 300 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -b "$VBITR"k -minrate 100k -maxrate 2M -bufsize 10M -rc_eq 'blurCplx^(1-qComp)' -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -level 30 "$OFILE"

AtomicParsley "$OFILE" --DeepScan --iPod-uuid 1200 --overWrite && cp "$OFILE" /network/valeo/gjb/Movies/encoding/mp4 && rm "$OFILE" ffmpeg2pass-0.log x264_2pass.log
done