make app icon for iOS using ffmpeg

make-app-icon-ffmpeg.sh

if [ "$#" -eq 2 ]
then
mkdir $2

ffmpeg -y -i $1 -vf scale=20x20 $2/[email protected]
ffmpeg -y -i $1 -vf scale=40x40 $2/[email protected]
ffmpeg -y -i $1 -vf scale=60x60 $2/[email protected]

ffmpeg -y -i $1 -vf scale=29x29 $2/[email protected]
ffmpeg -y -i $1 -vf scale=58x58 $2/[email protected]
ffmpeg -y -i $1 -vf scale=87x87 $2/[email protected]

ffmpeg -y -i $1 -vf scale=40x40 $2/[email protected]
ffmpeg -y -i $1 -vf scale=80x80 $2/[email protected]
ffmpeg -y -i $1 -vf scale=120x120 $2/[email protected]

ffmpeg -y -i $1 -vf scale=120x120 $2/[email protected]
ffmpeg -y -i $1 -vf scale=180x180 $2/[email protected]

ffmpeg -y -i $1 -vf scale=76x76 $2/[email protected]
ffmpeg -y -i $1 -vf scale=152x152 $2/[email protected]

ffmpeg -y -i $1 -vf scale=167x167 $2/[email protected]

ffmpeg -y -i $1 -vf scale=1024x1024 $2/[email protected]

cat <<EOT > $2/Contents.json
{
  "images" : [
    {
      "size" : "20x20",
      "idiom" : "iphone",
      "filename" : "[email protected]",
      "scale" : "2x"
    },
    {
      "size" : "20x20",
      "idiom" : "iphone",
      "filename" : "[email protected]",
      "scale" : "3x"
    },
    {
      "size" : "29x29",
      "idiom" : "iphone",
      "filename" : "[email protected]",
      "scale" : "1x"
    },
    {
      "size" : "29x29",
      "idiom" : "iphone",
      "filename" : "[email protected]",
      "scale" : "2x"
    },
    {
      "size" : "29x29",
      "idiom" : "iphone",
      "filename" : "[email protected]",
      "scale" : "3x"
    },
    {
      "size" : "40x40",
      "idiom" : "iphone",
      "filename" : "[email protected]",
      "scale" : "2x"
    },
    {
      "size" : "40x40",
      "idiom" : "iphone",
      "filename" : "[email protected]",
      "scale" : "3x"
    },
    {
      "size" : "60x60",
      "idiom" : "iphone",
      "filename" : "[email protected]",
      "scale" : "2x"
    },
    {
      "size" : "60x60",
      "idiom" : "iphone",
      "filename" : "[email protected]",
      "scale" : "3x"
    },
    {
      "size" : "20x20",
      "idiom" : "ipad",
      "filename" : "[email protected]",
      "scale" : "1x"
    },
    {
      "size" : "20x20",
      "idiom" : "ipad",
      "filename" : "[email protected]",
      "scale" : "2x"
    },
    {
      "size" : "29x29",
      "idiom" : "ipad",
      "filename" : "[email protected]",
      "scale" : "1x"
    },
    {
      "size" : "29x29",
      "idiom" : "ipad",
      "filename" : "[email protected]",
      "scale" : "2x"
    },
    {
      "size" : "40x40",
      "idiom" : "ipad",
      "filename" : "[email protected]",
      "scale" : "1x"
    },
    {
      "size" : "40x40",
      "idiom" : "ipad",
      "filename" : "[email protected]",
      "scale" : "2x"
    },
    {
      "size" : "76x76",
      "idiom" : "ipad",
      "filename" : "[email protected]",
      "scale" : "1x"
    },
    {
      "size" : "76x76",
      "idiom" : "ipad",
      "filename" : "[email protected]",
      "scale" : "2x"
    },
    {
      "size" : "83.5x83.5",
      "idiom" : "ipad",
      "filename" : "[email protected]",
      "scale" : "2x"
    },
    {
      "size" : "1024x1024",
      "idiom" : "ios-marketing",
      "filename" : "[email protected]",
      "scale" : "1x"
    }
  ],
  "info" : {
    "version" : 1,
    "author" : "ldenoue"
  }
}
EOT
else
    echo "please pass your image filename and a directory to put results in"
    exit 1
fi