feh WARNING: < does not exist - skipping

#!/usr/bin/bash

input_folder="/home/power/Public/screen/input/"
output_folder="/home/power/Public/screen/output/"
slideshow_pid=""

### Function to upscale and copy images from the input folder to the output folder
upscale_and_copy() {
  local file_path="$1"
  local file_name=$(basename "$file_path")
  local output_path="$output_folder/$file_name"
  
  convert "$file_path" -resize 1920x1080^ "$output_path"
}

### Function to remove images from the output folder
remove_from_output_folder() {
  local file_path="$1"
  local file_name=$(basename "$file_path")
  local output_path="$output_folder/$file_name"
  
  rm "$output_path"
}

### Function to restart the slideshow
restart_slideshow() {
  if [[ -n "$slideshow_pid" ]]; then
    kill "$slideshow_pid"
  fi

### Function that plays the actual slideshow

  feh --quiet --fullscreen --cycle-once --slideshow-delay 3 "$output_folder" &
  slideshow_pid=$!
}

### Upscale and copy existing images from input to output folder
for file in "$input_folder"/*; do
  upscale_and_copy "$file"
done

### Display the images from the output folder in a slideshow
restart_slideshow

### Monitor input folder for changes and update the output folder accordingly
inotifywait -m -r -e create -e delete -e move -e modify "$input_folder" |
while read -r directory event filename; do
  if [[ $event == "CREATE" || $event == "MODIFY" || $event == "MOVED_TO" ]]; then
    upscale_and_copy "$input_folder/$filename"
    restart_slideshow
  elif [[ $event == "DELETE" || $event == "MOVED_FROM" ]]; then
    remove_from_output_folder "$input_folder/$filename"
    restart_slideshow
  fi
done

--info [flag]command_line
          Execute command_line and display its output in the bottom left 
          corner of the image. Can be used to display e.g. image dimensions or 
          EXIF information. Supports FORMAT SPECIFIERS. If flag is set to “;”, 
          the output will not be displayed by default, but has to be enabled 
          by the toggle_info key.