make mac os app icons (need 50 pixels padding around, see https://bootcamp.uxdesign.cc/creating-app-icons-for-macos-11-and-up-1132ccd479bc )

make-macapp-icon-ffmpeg.sh

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

ffmpeg -y -i $1 -vf scale=16x16 $2/[email protected]
ffmpeg -y -i $1 -vf scale=32x32 $2/[email protected]
ffmpeg -y -i $1 -vf scale=32x32 $2/[email protected]
ffmpeg -y -i $1 -vf scale=64x64 $2/[email protected]

ffmpeg -y -i $1 -vf scale=128x128 $2/[email protected]
ffmpeg -y -i $1 -vf scale=256x256 $2/[email protected]

ffmpeg -y -i $1 -vf scale=256x256 $2/[email protected]
ffmpeg -y -i $1 -vf scale=512x512 $2/[email protected]

ffmpeg -y -i $1 -vf scale=512x512 $2/[email protected]
ffmpeg -y -i $1 -vf scale=1024x1024 $2/[email protected]

else
    echo "please pass your image filename and a directory to put results in"
    exit 1
fi