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    "import subprocess\n",
    "from pathlib import Path\n",
    "from concurrent.futures import ThreadPoolExecutor, as_completed\n",
    "\n",
    "# --- CONFIGURATION ---\n",
    "# Set your target base directory path here\n",
    "TARGET_FOLDER = r\"/workspace/musubi-tuner/dataset/ltxxx\" \n",
    "MAX_THREADS = 16\n",
    "# ---------------------\n",
    "\n",
    "def process_video(file_path):\n",
    "    \"\"\"\n",
    "    Worker function executed by the threads. \n",
    "    Checks a single video and deletes it if the specific Unicode error is thrown.\n",
    "    Returns a status string to be printed by the main thread.\n",
    "    \"\"\"\n",
    "    # ffmpeg command to scan the video stream for errors\n",
    "    cmd =['ffmpeg', '-v', 'error', '-i', str(file_path), '-f', 'null', '-']\n",
    "    \n",
    "    try:\n",
    "        # text=True forces UTF-8 decoding. Corrupted byte headers \n",
    "        # from ffmpeg will trigger the UnicodeDecodeError here.\n",
    "        subprocess.run(cmd, capture_output=True, text=True)\n",
    "        return f\"[OK] Checked: {file_path.parent.name}/{file_path.name}\"\n",
    "        \n",
    "    except UnicodeDecodeError as e:\n",
    "        # Catching your specific UnicodeDecodeError\n",
    "        result_msg = f\"\\n[CORRUPTION DETECTED] UnicodeDecodeError in {file_path.parent.name}/{file_path.name}:\\n    -> {e}\\n\"\n",
    "        result_msg += f\"    -> Deleting {file_path.name}...\"\n",
    "        \n",
    "        try:\n",
    "            file_path.unlink() # Deletes the video\n",
    "            result_msg += \" SUCCESS.\"\n",
    "        except Exception as del_e:\n",
    "            result_msg += f\" FAILED: {del_e}\"\n",
    "            \n",
    "        return result_msg\n",
    "        \n",
    "    except FileNotFoundError:\n",
    "        return \"ERROR_FFMPEG_MISSING\"\n",
    "        \n",
    "    except Exception as e:\n",
    "        return f\"[ERROR] Unexpected error processing {file_path.name}: {e}\"\n",
    "\n",
    "def check_and_clean_videos(base_path):\n",
    "    base_dir = Path(base_path)\n",
    "    \n",
    "    if not base_dir.is_dir():\n",
    "        print(f\"Error: The path '{base_dir}' is not a valid directory.\")\n",
    "        return\n",
    "\n",
    "    video_extensions = {'.mp4', '.mkv', '.avi', '.mov', '.wmv', '.flv', '.webm', '.m4v'}\n",
    "    files_to_check =[]\n",
    "\n",
    "    # 1. Gather all matching video files first\n",
    "    for folder in base_dir.iterdir():\n",
    "        # Must be a directory, start with \"videos\", but NOT be exactly \"videos\"\n",
    "        if folder.is_dir() and folder.name.lower().startswith(\"videos\") and folder.name.lower() != \"videos\":\n",
    "            for file_path in folder.iterdir():\n",
    "                if file_path.is_file() and file_path.suffix.lower() in video_extensions:\n",
    "                    files_to_check.append(file_path)\n",
    "\n",
    "    if not files_to_check:\n",
    "        print(\"No videos found matching the criteria.\")\n",
    "        return\n",
    "\n",
    "    print(f\"Found {len(files_to_check)} videos. Starting scan with {MAX_THREADS} threads...\\n\")\n",
    "\n",
    "    # 2. Process the gathered files using 16 threads\n",
    "    with ThreadPoolExecutor(max_workers=MAX_THREADS) as executor:\n",
    "        # Submit all video processing tasks to the thread pool\n",
    "        futures = {executor.submit(process_video, path): path for path in files_to_check}\n",
    "        \n",
    "        # as_completed yields the results the moment a thread finishes its file\n",
    "        for future in as_completed(futures):\n",
    "            result = future.result()\n",
    "            \n",
    "            # Halt completely if ffmpeg isn't installed\n",
    "            if result == \"ERROR_FFMPEG_MISSING\":\n",
    "                print(\"\\n[CRITICAL ERROR] 'ffmpeg' command not found. Ensure it is installed and in your PATH.\")\n",
    "                executor.shutdown(wait=False, cancel_futures=True) # Attempt to cancel pending threads\n",
    "                return\n",
    "            \n",
    "            # Print the result returned from the worker thread\n",
    "            print(result)\n",
    "\n",
    "if __name__ == \"__main__\":\n",
    "    check_and_clean_videos(TARGET_FOLDER)\n",
    "    print(\"\\nScan complete.\")"
   ]
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