Iâve observed that, possibly due to unsuccessful file transfers over the years, some FLAC files appear to be corrupted. This could be because they lack a header or because their file size is too small.
It seems that SongKong might struggle to handle these corrupted files efficiently. While this is understandable, as itâs not the primary purpose of SongKong, I took the initiative to write a script today. This script scans all my files and relocates them if the FLAC file is found to be corrupted.
import os
import subprocess
import sys
import multiprocessing
import shutil
import time
total_files_analyzed = 0
total_corrupted_files = 0
def check_flac_file(file_path, output_folder, log_file):
global total_files_analyzed
global total_corrupted_files
total_files_analyzed += 1
if os.path.getsize(file_path) < 1024:
with open(log_file, 'a') as log:
log.write(f"Corrupted FLAC file (too small): {file_path}\n")
total_corrupted_files += 1
return "File too small"
result = subprocess.run(["file", "--mime-type", file_path], stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
if "audio/flac" not in result.stdout:
with open(log_file, 'a') as log:
log.write(f"Corrupted FLAC file (no header): {file_path}\n")
total_corrupted_files += 1
return "No FLAC header"
return None
def scan_folder_for_flac(input_folder, output_folder, log_file):
with open(log_file, 'w') as log:
log.write("Starting FLAC file checking script...\n")
for root, _, files in os.walk(input_folder):
for file in files:
if file.endswith(".flac"):
file_path = os.path.join(root, file)
log.write(f"Checking {file_path}...\n")
corruption_reason = check_flac_file(file_path, output_folder, log_file)
if corruption_reason:
# Recreate the directory structure in the output folder
relative_path = os.path.relpath(root, input_folder)
new_output_folder = os.path.join(output_folder, relative_path)
if not os.path.exists(new_output_folder):
os.makedirs(new_output_folder)
shutil.move(file_path, os.path.join(new_output_folder, os.path.basename(file_path)))
log.write(f"Corrupted FLAC file moved ({corruption_reason}): {file_path}\n")
def log_progress(log_progress_file):
while True:
with open(log_progress_file, 'a') as log:
timestamp = time.strftime('%Y-%m-%d %H:%M:%S')
log.write(f"{timestamp} - {total_corrupted_files}/{total_files_analyzed}\n")
time.sleep(10)
if __name__ == "__main__":
if len(sys.argv) != 4:
print("Usage: python3 flac_checker.py /music /corrupted_flacs /app/flac_checker.log")
sys.exit(1)
input_folder = sys.argv[1]
output_folder = sys.argv[2]
log_file = sys.argv[3]
log_progress_file = "/app/progress.log"
p = multiprocessing.Process(target=log_progress, args=(log_progress_file,))
p.start()
scan_folder_for_flac(input_folder, output_folder, log_file)
p.terminate()
this is a quick way to get rid of all these files. the script checks each file for a missing header or an under 1kB filesize, if one of these two conditions is met, it moves the file, together with its whole folder structure, to a destination folder.
the log will then clearly show which files are checked :
Checking /music/01-2021/Aleksi Perälä - Midnight Sun 4 EP-1 (2021) APMU39EP1 - FLAC 24 96000/01. FI3AC2139290.flac...
Checking /music/01-2021/Aleksi Perälä - Midnight Sun 4 EP-1 (2021) APMU39EP1 - FLAC 24 96000/03. FI3AC2139310.flac...
Checking /music/01-2021/Aleksi Perälä - Midnight Sun 4 EP-1 (2021) APMU39EP1 - FLAC 24 96000/02. FI3AC2139300.flac...
and the files that were moved, and why :
Corrupted FLAC file moved (No FLAC header): /music/01-2021/Bernard Szajner & Zed - Some Deaths Take Forever (2021) [WEB 24bit FLAC] {Cortizona}/02. Bernard Szajner & Zed - Ritual.flac
Corrupted FLAC file moved (No FLAC header): /music/01-2021/Bernard Szajner & Zed - Some Deaths Take Forever (2021) [WEB 24bit FLAC] {Cortizona}/03. Bernard Szajner & Zed - Execute.flac
Corrupted FLAC file moved (No FLAC header): /music/01-2021/Bernard Szajner & Zed - Some Deaths Take Forever (2021) [WEB 24bit FLAC] {Cortizona}/04. Bernard Szajner & Zed - Ressurector.flac
and the progress log shows the amount of corupted files moved against the amount of analysez tracks :
root@Tower:/mnt/cache/appdata/flac_checker# tail -f progress.log
2023-09-13 17:21:40 - 0/0
2023-09-13 17:21:50 - 0/0
2023-09-13 17:22:00 - 0/0
2023-09-13 17:22:10 - 0/0
2023-09-13 17:22:20 - 0/0
2023-09-13 17:24:29 - 0/0
2023-09-13 17:24:39 - 0/486
2023-09-13 17:24:49 - 0/620
2023-09-13 17:24:59 - 0/715
2023-09-13 17:25:09 - 0/824
2023-09-13 17:25:19 - 0/935
2023-09-13 17:25:29 - 0/1052
2023-09-13 17:25:39 - 0/1156
Iâll keep it running in order to get rid of all these files before I run songkong again.
