Polaroid

convert input.jpg \
   -thumbnail 1600x1600 \
   -gravity center -extent 1200x1200 \
   -mattecolor '#ddd' -frame 1x1 \
   -bordercolor White    -border 50x50  -gravity south -splice 0x240 \
   -font raleway-extralight  -pointsize 72  -annotate +0+140  "Testo riga 1" \
   -pointsize 48  -annotate +0+60  "Testo riga 2" \
   output.jpg