split image by width using imagemagic

slice.sh

function slice() {
  local slice_width="${SLICEW:-1080}"
  local width=$(identify -format "%[w]" $1)
  local slices=$(($width/$slice_width))
  local name="${1%.*}"
  
  echo -e "slice ($slices x $slice_width) for image $1"
  convert -crop "${slices}x1@" $1 "${name}-%d.png"
}


# this will split image into slices:
$ slice solid.png