添加ncm转mp3,flac

ncmTranslatorScript_python/README.md

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+

ncmTranslatorScript_python/ncmTranslator.py

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+import base64
+import binascii
+import json
+import logging
+import os
+import struct
+import sys
+import time
+import urllib.request
+from os import fspath
+from pathlib import Path
+from concurrent.futures import ThreadPoolExecutor, as_completed
+from Crypto.Cipher import AES
+from tqdm import tqdm
+
+music_suffix_list = ['mp3', 'wav', 'ape', 'flac', 'MP3', 'WAV', 'APE', 'FLAC']
+
+
+# 进行ncm解码
+def dump(file_path, file_name_no_suffix):
+    core_key = binascii.a2b_hex("687A4852416D736F356B496E62617857")
+    meta_key = binascii.a2b_hex("2331346C6A6B5F215C5D2630553C2728")
+    unpad = lambda s: s[0:-(s[-1] if isinstance(s[-1], int) else ord(s[-1]))]
+    with open(file_path, 'rb') as f:
+        header = f.read(8)
+        assert binascii.b2a_hex(header) == b'4354454e4644414d'
+        f.seek(2, 1)
+        key_length = struct.unpack('<I', f.read(4))[0]
+        key_data = f.read(key_length)
+        key_data = bytes([b ^ 0x64 for b in key_data])
+        cryptor = AES.new(core_key, AES.MODE_ECB)
+        key_data = unpad(cryptor.decrypt(key_data))[17:]
+        key_length = len(key_data)
+        key_box = bytearray(range(256))
+        c = 0
+        last_byte = 0
+        key_offset = 0
+        for i in range(256):
+            swap = key_box[i]
+            c = (swap + last_byte + key_data[key_offset]) & 0xff
+            key_offset = (key_offset + 1) % key_length
+            key_box[i], key_box[c] = key_box[c], swap
+            last_byte = c
+
+        meta_length = struct.unpack('<I', f.read(4))[0]
+        meta_data = f.read(meta_length)
+        meta_data = bytes([b ^ 0x63 for b in meta_data])
+        meta_data = base64.b64decode(meta_data[22:])
+        cryptor = AES.new(meta_key, AES.MODE_ECB)
+        meta_data = unpad(cryptor.decrypt(meta_data)).decode('utf-8')[6:]
+        meta_data = json.loads(meta_data)
+
+        f.seek(9, 1)  # 跳过crc32(4字节)和未知5字节
+        image_size = struct.unpack('<I', f.read(4))[0]
+        _ = f.read(image_size)  # 专辑图像数据忽略
+
+        file_name = file_name_no_suffix + '.' + meta_data['format']
+        output_path = os.path.join(os.path.split(file_path)[0], file_name)
+
+        with open(output_path, 'wb') as m:
+            while True:
+                chunk = bytearray(f.read(0x8000))
+                if not chunk:
+                    break
+                for i in range(len(chunk)):
+                    j = (i + 1) & 0xff
+                    chunk[i] ^= key_box[(key_box[j] + key_box[(key_box[j] + j) & 0xff]) & 0xff]
+                m.write(chunk)
+
+    # ✅ 专辑图片下载已注释
+    # try:
+    #     urllib.request.urlretrieve(meta_data['albumPic'],
+    #                                os.path.join(os.path.split(file_path)[0], file_name_no_suffix) + '.jpg')
+    # except Exception as e:
+    #     print('下载专辑图片出错', e)
+
+    return output_path  # 返回生成的文件路径
+
+
+def file_extension(path):
+    return os.path.splitext(path)[-1][1:]
+
+
+def file_no_extension(path):
+    filename = os.path.basename(path)
+    if not filename or filename.startswith('.'):
+        return filename
+    return os.path.splitext(filename)[0]
+
+
+def file_exist(file_name, file_list, file_list_path):
+    base_name = file_no_extension(file_name)
+    for file in file_list:
+        if os.path.isdir(os.path.join(file_list_path, file)):
+            continue
+        for suffix in music_suffix_list:
+            if (base_name + "." + suffix) == file:
+                return True
+    return False
+
+
+def recursion(file_name, root_dir, file_list, tasks):
+    full_file = os.path.join(root_dir, file_name)
+    if os.path.isfile(full_file):
+        if file_extension(full_file) != "ncm":
+            return
+        if file_exist(file_name, file_list, root_dir):
+            return
+        tasks.append((full_file, file_no_extension(file_name)))
+    elif os.path.isdir(full_file):
+        for child in os.listdir(full_file):
+            recursion(child, full_file, os.listdir(full_file), tasks)
+
+
+if __name__ == '__main__':
+    if len(sys.argv) > 1:
+        rootdir = sys.argv[1]
+    else:
+        rootdir = fspath(Path(__file__).parent.resolve())
+    print('当前需要处理的文件夹路径: ' + rootdir)
+
+    start_time = time.time()
+    print('开始处理 ' + time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()))
+
+    file_list = os.listdir(rootdir)
+    tasks = []
+    for file in file_list:
+        recursion(file, rootdir, file_list, tasks)
+
+    total = len(tasks)
+    print(f"共找到 {total} 个待转码文件")
+
+    with ThreadPoolExecutor(max_workers=os.cpu_count() or 4) as executor:
+        futures = {executor.submit(dump, file_path, no_suffix): file_path for file_path, no_suffix in tasks}
+
+        with tqdm(total=total, desc="正在转码", unit="file") as pbar:
+            for future in as_completed(futures):
+                try:
+                    result_path = future.result()
+                    # ✅ 在进度条上方显示文件名称
+                    tqdm.write(f"转码完成: {result_path}")
+                except Exception as e:
+                    logging.exception("转码任务出错", exc_info=e)
+                finally:
+                    pbar.update(1)
+
+    end_time = time.time()
+    print('全部文件处理完成 ' + time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()))
+    print('处理时间:', end_time - start_time)

ncmTranslatorScript_python/requirements.txt

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+pycryptodome>=3.20.0
+tqdm>=4.66.0