convert_audio.sh

#!/usr/bin/env bash

# Check if the required commands are available
if ! command -v ffmpeg &>/dev/null; then
	echo "Error: FFmpeg is not installed. Please install FFmpeg."
	exit 1
fi

if ! command -v convert &>/dev/null; then
	echo "Error: ImageMagick's 'convert' command is not installed. Please install ImageMagick."
	exit 1
fi

# Get user inputs
read -p "Enter the path to the directory containing audio files (mp3/m4a): " audio_dir
read -p "Enter the path to the directory containing images: " image_dir

# Navigate to the audio directory
cd "$audio_dir" || exit

# Loop through audio files
for audio_file in *.mp3 *.m4a; do
	if [ -f "$audio_file" ]; then
		# Get the audio file name without extension
		audio_name="${audio_file%.*}"

		# Find a random image from the user-supplied directory
		image_list=("$image_dir"/*)
		random_image="${image_list[RANDOM % ${#image_list[@]}]}"

		# Create a temporary video file name
		temp_video="${audio_name}_temp.mp4"

		# Combine audio with image using FFmpeg
		ffmpeg -loop 1 -i "$random_image" -i "$audio_file" -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" -c:a copy -shortest "$temp_video"

		# Clean up image file
		rm "$random_image"

		# Rename temporary video to match the audio file name
		mv "$temp_video" "${audio_name}.mp4"

		echo "Converted $audio_file to video."
	fi
done

echo "Conversion complete!"