refactor(core): 移除旧版 FFmpeg 业务逻辑并重构常量配置

- 删除 biz/ffmpeg.py 和 biz/task.py 旧版业务模块
- 删除 entity/ffmpeg.py FFmpeg 任务实体类
- 删除 config/__init__.py 旧版配置初始化
- 更新 constant/__init__.py 常量定义，从 v1/v2 版本改为统一版本
- 修改 handlers/base.py 基础处理器，替换 OSS 相关导入为存储服务
- 添加 subprocess_args 工具函数支持跨平台进程参数配置
- 新增 probe_video_info 函数用于视频信息探测
- 新增 probe_duration_json 函数用于媒体时长探测

handlers/base.py

@@ -6,19 +6,19 @@
 """
 
 import os
+import json
 import logging
 import shutil
 import tempfile
 import subprocess
 from abc import ABC
-from typing import Optional, List, TYPE_CHECKING
+from typing import Optional, List, Dict, Any, Tuple, TYPE_CHECKING
 
 from core.handler import TaskHandler
 from domain.task import Task
 from domain.result import TaskResult, ErrorCode
 from domain.config import WorkerConfig
-from util import oss
-from util.ffmpeg import subprocess_args
+from services import storage
 
 if TYPE_CHECKING:
     from services.api_client import APIClientV2
@@ -45,6 +45,117 @@ AUDIO_ENCODE_ARGS = [
 ]
 
 
+def subprocess_args(include_stdout: bool = True) -> Dict[str, Any]:
+    """
+    创建跨平台的 subprocess 参数
+
+    在 Windows 上使用 Pyinstaller --noconsole 打包时，需要特殊处理以避免弹出命令行窗口。
+
+    Args:
+        include_stdout: 是否包含 stdout 捕获
+
+    Returns:
+        subprocess.run 使用的参数字典
+    """
+    ret: Dict[str, Any] = {}
+
+    # Windows 特殊处理
+    if hasattr(subprocess, 'STARTUPINFO'):
+        si = subprocess.STARTUPINFO()
+        si.dwFlags |= subprocess.STARTF_USESHOWWINDOW
+        ret['startupinfo'] = si
+        ret['env'] = os.environ
+
+    # 重定向 stdin 避免 "handle is invalid" 错误
+    ret['stdin'] = subprocess.PIPE
+
+    if include_stdout:
+        ret['stdout'] = subprocess.PIPE
+
+    return ret
+
+
+def probe_video_info(video_file: str) -> Tuple[int, int, float]:
+    """
+    探测视频信息（宽度、高度、时长）
+
+    Args:
+        video_file: 视频文件路径
+
+    Returns:
+        (width, height, duration) 元组，失败返回 (0, 0, 0)
+    """
+    try:
+        result = subprocess.run(
+            [
+                'ffprobe', '-v', 'error',
+                '-select_streams', 'v:0',
+                '-show_entries', 'stream=width,height:format=duration',
+                '-of', 'csv=s=x:p=0',
+                video_file
+            ],
+            capture_output=True,
+            timeout=30,
+            **subprocess_args(False)
+        )
+
+        if result.returncode != 0:
+            logger.warning(f"ffprobe failed for {video_file}")
+            return 0, 0, 0
+
+        output = result.stdout.decode('utf-8').strip()
+        if not output:
+            return 0, 0, 0
+
+        lines = output.split('\n')
+        if len(lines) >= 2:
+            wh = lines[0].strip()
+            duration_str = lines[1].strip()
+            width, height = wh.split('x')
+            return int(width), int(height), float(duration_str)
+
+        return 0, 0, 0
+
+    except Exception as e:
+        logger.warning(f"probe_video_info error: {e}")
+        return 0, 0, 0
+
+
+def probe_duration_json(file_path: str) -> Optional[float]:
+    """
+    使用 ffprobe JSON 输出探测媒体时长
+
+    Args:
+        file_path: 媒体文件路径
+
+    Returns:
+        时长（秒），失败返回 None
+    """
+    try:
+        result = subprocess.run(
+            [
+                'ffprobe', '-v', 'error',
+                '-show_entries', 'format=duration',
+                '-of', 'json',
+                file_path
+            ],
+            capture_output=True,
+            timeout=30,
+            **subprocess_args(False)
+        )
+
+        if result.returncode != 0:
+            return None
+
+        data = json.loads(result.stdout.decode('utf-8'))
+        duration = data.get('format', {}).get('duration')
+        return float(duration) if duration else None
+
+    except Exception as e:
+        logger.warning(f"probe_duration_json error: {e}")
+        return None
+
+
 class BaseHandler(TaskHandler, ABC):
     """
     任务处理器基类
@@ -128,7 +239,7 @@ class BaseHandler(TaskHandler, ABC):
             timeout = self.config.download_timeout
 
         try:
-            result = oss.download_from_oss(url, dest)
+            result = storage.download_file(url, dest, timeout=timeout)
             if result:
                 file_size = os.path.getsize(dest) if os.path.exists(dest) else 0
                 logger.debug(f"Downloaded: {url} -> {dest} ({file_size} bytes)")
@@ -171,7 +282,7 @@ class BaseHandler(TaskHandler, ABC):
 
         # 上传文件
         try:
-            result = oss.upload_to_oss(upload_url, file_path)
+            result = storage.upload_file(upload_url, file_path, timeout=self.config.upload_timeout)
             if result:
                 file_size = os.path.getsize(file_path)
                 logger.info(f"[task:{task_id}] Uploaded: {file_path} ({file_size} bytes)")
@@ -241,8 +352,13 @@ class BaseHandler(TaskHandler, ABC):
         Returns:
             时长（秒），失败返回 None
         """
+        # 首先尝试 JSON 输出方式
+        duration = probe_duration_json(file_path)
+        if duration is not None:
+            return duration
+
+        # 回退到旧方式
         try:
-            from util.ffmpeg import probe_video_info
             _, _, duration = probe_video_info(file_path)
             return float(duration) if duration else None
         except Exception as e: