optimize-mp4.sh

#!/usr/bin/env bash

# Check if ffmpeg is installed
if ! command -v ffmpeg &>/dev/null; then
	echo "Error: ffmpeg is not installed. Please install it before running this script."
	exit 1
fi

# Check for the correct number of command-line arguments
if [ $# -ne 1 ]; then
	echo "Usage: $0 <directory>"
	exit 1
fi

# Input directory containing MP4 files to optimize
input_directory="$1"

# Check if the input directory exists
if [ ! -d "$input_directory" ]; then
	echo "Error: The specified directory does not exist."
	exit 1
fi

# Function to optimize an MP4 file
optimize_mp4() {
	local input_file="$1"
	local output_file="${input_file%.mp4}_optimized.mp4"

	# Check if the output file already exists
	if [ -e "$output_file" ]; then
		echo "Output file already exists: $output_file"
		return
	fi

	echo "Optimizing: $input_file"

	# Use ffmpeg to optimize the MP4 file with lossless settings
	ffmpeg -i "$input_file" -c:v copy -c:a copy "$output_file"

	if [ $? -eq 0 ]; then
		echo "Optimization successful: $output_file"
		# Optionally, you can delete the original file to save space
		# rm "$input_file"
	else
		echo "Optimization failed for: $input_file"
	fi
}

# Find all MP4 files in the specified directory
find "$input_directory" -type f -name "*.mp4" | while read -r file; do
	optimize_mp4 "$file"
done

echo "Optimization complete!"