Script to square pictures, add a white border and resize them to 1200px for instagram

instagram_border.sh

#!/bin/bash
for dir in */ ; do
    # Check if there are images in the folder before moving forward
    if [[ $(find $dir -maxdepth 1 -type f -name "*.jpg"| wc -l) -ge 1 ]]; then
        # If there is already an instagram folder in this folder, I skip.
        if [[ ! -d "$dir"instagram ]]; then
            mkdir "$dir"instagram
        fi

        for file in "$dir"*.jpg ; do
            filename="${file##*/}"
            if [[ -f "$dir"/instagram/"$filename" ]]; then
                continue
            fi
            # Get picture dimentions (w & h)
            #IFS=" x+" read w h x y < <(convert -fuzz 10% "$file" -format "%@" info:)
            IFS=" x+" read w h x y < <(convert "$file" -format "%@" info:)
            # Get longest side
            longest=$w
            [ $h -gt $longest ] && longest=$h

            # Add 10% border
            longest=$(echo "scale=0;$longest*1.05/1" | bc)

            pic="$dir"instagram/$(basename "$file")
            echo "$pic" # to see the progress
            # convert -fuzz 10% "$file" -trim -background white -gravity center -extent ${longest}x${longest} "$pic"
            convert "$file" -trim -background white -gravity center -extent ${longest}x${longest} -resize 1200x1200 "$pic"
        done
    fi
done

Example of the result

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