Bash ImageMagick script to compress images in a directory named source to a directory called output

compress_images.sh

#!/bin/bash

# Ensure the output directory exists
mkdir -p output

# Iterate through all image files in the source directory
for image in source/*.{jpg,jpeg,png,gif}; do
  if [[ -f "$image" ]]; then
    # Get the filename without the directory path
    filename=$(basename "$image")

    # Print output
    echo "converting $filename"
    
    # Compress the image and save it to the output directory
    convert "$image" -strip -interlace Plane -gaussian-blur 0.05 -quality 85% "output/$filename"
  fi
done

echo "Image compression complete. Compressed images are saved in the 'output' directory."

Video version

#!/bin/bash

# Ensure the output directory exists
mkdir -p output

# Function to display progress bar
progress_bar() {
  local duration=$1
  local filename=$2

  echo -ne "Compressing $filename ["
  local elapsed=0
  while [[ $elapsed -lt $duration ]]; do
    local percent=$(( (elapsed * 100) / duration ))
    local bar=$(printf "%-${percent}s" "=")
    echo -ne "$bar\r"
    sleep 1
    ((elapsed++))
  done
  echo "] Done!"
}

# Iterate through all mp4 files in the source directory
for video in source/*.mp4; do
  if [[ -f "$video" ]]; then
    # Get the filename without the directory path
    filename=$(basename "$video")

    # Get the duration of the video in seconds
    duration=$(ffmpeg -i "$video" 2>&1 | grep "Duration" | awk '{print $2}' | tr -d , | awk -F: '{ print ($1 * 3600) + ($2 * 60) + $3 }')

    # Start the compression process in the background
    ffmpeg -i "$video" -vcodec libx265 -crf 28 "output/$filename" &

    # Get the process ID of the ffmpeg command
    ffmpeg_pid=$!

    # Display the progress bar
    progress_bar $duration "$filename" &

    # Wait for the ffmpeg process to complete
    wait $ffmpeg_pid

    echo "Compression of $filename completed."
  fi
done

echo "Video compression complete. Compressed videos are saved in the 'output' directory."