Con­vert an ani­mated gif to sequence of pdf files.
Now you can scale and rotate the images and keep their full pix­elized beauty.



FILE=$1
BGCOLOR=88FF99

 

convert -adaptive-resize 300% \
        -interpolate integer \
        +antialias -coalesce \
        $FILE resize.gif

 

mv resize.gif coalesce.gif

 

HSIZE=`identify coalesce.gif | \
       cut -d " " -f 3 | \
       head -1 | cut -d "x" -f 1`
VSIZE=`identify coalesce.gif | \
       cut -d " " -f 3 | \
       head -1 | cut -d "x" -f 2`
HADD=`expr \( 400 - $HSIZE \) / 2`
VADD=`expr \( 400 - $VSIZE \) / 2`

 

convert -scene 1 +adjoin \
        -bordercolor \#${BGCOLOR} \
        -border ${HADD}x${VADD} \
        -gravity center \
    coalesce.gif \
    ${FILE%%.*}_%03d.gif

 

for FRAME in `ls ${FILE%%.*}_*.gif`
 do
    autotrace -background-color=$BGCOLOR \
      -corner-threshold 100 \
      -corner-always-threshold 200 \
      -corner-surround 1 \
      -report-progress \
      -output-file=${FRAME%%.*}.pdf \
      $FRAME
           rm $FRAME
     done; rm coalesce.gif
exit 0;