Recursively transcode FLAC files to MP3

import os
from pathlib import Path
import subprocess
from mutagen.flac import FLAC

def convert_flac_to_mp3(flac_path):
    try:
        # Get the output MP3 path
        mp3_path = str(flac_path).replace('.flac', '.mp3')

        # If MP3 already exists, skip
        if os.path.exists(mp3_path):
            print(f"MP3 already exists, skipping: {mp3_path}")
            return False

        # Read FLAC metadata
        flac_audio = FLAC(flac_path)

        # Construct ffmpeg command with overwrite prevention
        cmd = [
            'ffmpeg',
            '-i', str(flac_path),
            '-ab', '320k',  # 320kbps bitrate
            '-map_metadata', '0',  # Copy metadata
            '-id3v2_version', '3',  # Use ID3v2.3 tags
            '-n',  # Don't overwrite output files
            mp3_path
        ]

        # Execute conversion
        result = subprocess.run(cmd, capture_output=True, text=True)

        if result.returncode == 0:
            # Verify the MP3 file exists and has size > 0
            if os.path.exists(mp3_path) and os.path.getsize(mp3_path) > 0:
                print(f"Successfully converted: {flac_path}")
                # Delete original FLAC file
                # NOTE: Comment this out if you want to keep the original FLAC file
                os.remove(flac_path)
                print(f"Deleted original: {flac_path}")
                return True
            else:
                print(f"Conversion seemed successful but MP3 file is missing or empty: {mp3_path}")
                return False
        else:
            print(f"Error converting {flac_path}: {result.stderr}")
            return False

    except Exception as e:
        print(f"Error processing {flac_path}: {str(e)}")
        return False

def main():
    # Get the current directory
    directory = Path('.')

    # Find all FLAC files recursively
    flac_files = list(directory.rglob('*.flac'))

    if not flac_files:
        print("No FLAC files found.")
        return

    print(f"Found {len(flac_files)} FLAC files.")

    # Convert each FLAC file
    successful_conversions = 0
    for flac_file in flac_files:
        print(f"\nProcessing: {flac_file}")
        if convert_flac_to_mp3(flac_file):
            successful_conversions += 1

    print(f"\nConversion complete. Successfully converted {successful_conversions} of {len(flac_files)} files.")

if __name__ == '__main__':
    main()