feat(cache): 增强缓存锁机制支持进程存活检测

- 添加了锁元数据写入和读取功能，记录进程ID和启动时间
- 实现了进程存活检查机制，防止PID复用导致的死锁
- 引入了过期锁检测和自动清理机制
- 集成了psutil库进行系统进程监控
- 优化了缓存清理逻辑，支持跳过活跃锁文件
- 使用JSON格式存储锁元数据信息

handlers/base.py

@@ -464,6 +464,11 @@ class BaseHandler(TaskHandler, ABC):
             if result:
                 file_size = os.path.getsize(file_path)
                 logger.info(f"[task:{task_id}] Uploaded: {file_path} ({file_size} bytes)")
+
+                # 将上传成功的文件加入缓存
+                if access_url:
+                    self.material_cache.add_to_cache(access_url, file_path)
+
                 return access_url
             else:
                 logger.error(f"[task:{task_id}] Upload failed: {file_path}")

handlers/finalize_mp4.py

@@ -127,9 +127,9 @@ class FinalizeMp4Handler(BaseHandler):
         concat_file = os.path.join(work_dir, 'concat.txt')
         with open(concat_file, 'w', encoding='utf-8') as f:
             for ts_file in ts_files:
-                # 路径中的反斜杠需要转义或使用正斜杠
-                ts_path = ts_file.replace('\\', '/')
-                f.write(f"file '{ts_path}'\n")
+                # FFmpeg concat 路径相对于 concat.txt 所在目录，只需写文件名
+                ts_filename = os.path.basename(ts_file)
+                f.write(f"file '{ts_filename}'\n")
 
         # 3. 构建合并命令（remux，不重编码）
         cmd = [

handlers/render_video.py

@@ -466,6 +466,8 @@ class RenderSegmentVideoHandler(BaseHandler):
                 base_filters=filters,
                 effects=effects,
                 fps=fps,
+                width=width,
+                height=height,
                 has_overlay=has_overlay,
                 is_video_overlay=is_video_overlay,
                 overlap_head_ms=overlap_head_ms,
@@ -492,12 +494,13 @@ class RenderSegmentVideoHandler(BaseHandler):
         if has_overlay:
             # 使用 filter_complex 格式
             base_filters = ','.join(filters) if filters else 'copy'
+            overlay_scale = f"scale={width}:{height}"
             # 视频 overlay 使用 eof_action=pass（结束后消失），图片 overlay 使用默认行为（保持显示）
             overlay_params = 'eof_action=pass' if is_video_overlay else ''
             overlay_filter = f"overlay=0:0:{overlay_params}" if overlay_params else 'overlay=0:0'
             # 视频 overlay 需要在末尾统一颜色范围，避免 overlay 结束后 range 从 tv 变为 pc
             range_fix = ',format=yuv420p,setrange=tv' if is_video_overlay else ''
-            return f"[0:v]{base_filters}[base];[base][1:v]{overlay_filter}{range_fix}"
+            return f"[0:v]{base_filters}[base];[1:v]{overlay_scale}[overlay];[base][overlay]{overlay_filter}{range_fix}"
         else:
             return ','.join(filters) if filters else ''
 
@@ -506,6 +509,8 @@ class RenderSegmentVideoHandler(BaseHandler):
         base_filters: List[str],
         effects: List[Effect],
         fps: int,
+        width: int,
+        height: int,
         has_overlay: bool = False,
         is_video_overlay: bool = False,
         overlap_head_ms: int = 0,
@@ -521,6 +526,8 @@ class RenderSegmentVideoHandler(BaseHandler):
             base_filters: 基础滤镜列表
             effects: 特效列表
             fps: 帧率
+            width: 输出宽度
+            height: 输出高度
             has_overlay: 是否有叠加层
             is_video_overlay: 叠加层是否为视频格式（如 .mov）
             overlap_head_ms: 头部 overlap 时长
@@ -604,9 +611,12 @@ class RenderSegmentVideoHandler(BaseHandler):
             # 视频 overlay 使用 eof_action=pass（结束后消失），图片 overlay 使用默认行为（保持显示）
             overlay_params = 'eof_action=pass' if is_video_overlay else ''
             overlay_filter = f"overlay=0:0:{overlay_params}" if overlay_params else 'overlay=0:0'
+            overlay_scale = f"scale={width}:{height}"
+            overlay_output = '[v_overlay]'
             # 视频 overlay 需要在末尾统一颜色范围，避免 overlay 结束后 range 从 tv 变为 pc
             range_fix = ',format=yuv420p,setrange=tv' if is_video_overlay else ''
-            filter_parts.append(f"{current_output}[1:v]{overlay_filter}{range_fix}")
+            filter_parts.append(f"[1:v]{overlay_scale}{overlay_output}")
+            filter_parts.append(f"{current_output}{overlay_output}{overlay_filter}{range_fix}")
         else:
             # 移除最后一个标签，直接输出
             # 将最后一个滤镜的输出标签替换为空（直接输出）

services/cache.py

@@ -5,6 +5,7 @@
 提供素材下载缓存功能，避免相同素材重复下载。
 """
 
+import json
 import os
 import hashlib
 import logging
@@ -14,6 +15,8 @@ import uuid
 from typing import Optional, Tuple
 from urllib.parse import urlparse, unquote
 
+import psutil
+
 from services import storage
 
 logger = logging.getLogger(__name__)
@@ -62,6 +65,7 @@ class MaterialCache:
 
     LOCK_TIMEOUT_SEC = 30.0
     LOCK_POLL_INTERVAL_SEC = 0.1
+    LOCK_STALE_SECONDS = 24 * 60 * 60
 
     def __init__(self, cache_dir: str, enabled: bool = True, max_size_gb: float = 0):
         """
@@ -100,6 +104,96 @@ class MaterialCache:
         assert self.cache_dir
         return os.path.join(self.cache_dir, f"{cache_key}.lock")
 
+    def _write_lock_metadata(self, lock_fd: int, lock_path: str) -> bool:
+        """写入锁元数据，失败则清理锁文件"""
+        try:
+            try:
+                process_start_time = psutil.Process(os.getpid()).create_time()
+            except Exception as e:
+                process_start_time = None
+                logger.warning(f"Cache lock process start time error: {e}")
+            metadata = {
+                'pid': os.getpid(),
+                'process_start_time': process_start_time,
+                'created_at': time.time()
+            }
+            with os.fdopen(lock_fd, 'w', encoding='utf-8') as lock_file:
+                json.dump(metadata, lock_file)
+            return True
+        except Exception as e:
+            try:
+                os.close(lock_fd)
+            except Exception:
+                pass
+            self._remove_lock_file(lock_path, f"write metadata failed: {e}")
+            return False
+
+    def _read_lock_metadata(self, lock_path: str) -> Optional[dict]:
+        """读取锁元数据，失败返回 None（兼容历史空锁文件）"""
+        try:
+            with open(lock_path, 'r', encoding='utf-8') as lock_file:
+                data = json.load(lock_file)
+            return data if isinstance(data, dict) else None
+        except Exception:
+            return None
+
+    def _is_process_alive(self, pid: int, expected_start_time: Optional[float]) -> bool:
+        """判断进程是否存活并校验启动时间（防止 PID 复用）"""
+        try:
+            process = psutil.Process(pid)
+            if expected_start_time is None:
+                return process.is_running()
+            actual_start_time = process.create_time()
+            return abs(actual_start_time - expected_start_time) < 1.0
+        except psutil.NoSuchProcess:
+            return False
+        except Exception as e:
+            logger.warning(f"Cache lock process check error: {e}")
+            return True
+
+    def _is_lock_stale(self, lock_path: str) -> bool:
+        """判断锁是否过期（进程已退出或超过最大存活时长）"""
+        if not os.path.exists(lock_path):
+            return False
+        now = time.time()
+        metadata = self._read_lock_metadata(lock_path)
+        if metadata:
+            created_at = metadata.get('created_at')
+            if isinstance(created_at, (int, float)) and now - created_at > self.LOCK_STALE_SECONDS:
+                return True
+            pid = metadata.get('pid')
+            pid_value = int(pid) if isinstance(pid, int) or (isinstance(pid, str) and pid.isdigit()) else None
+            expected_start_time = metadata.get('process_start_time')
+            expected_start_time_value = (
+                expected_start_time if isinstance(expected_start_time, (int, float)) else None
+            )
+            if pid_value is not None and not self._is_process_alive(pid_value, expected_start_time_value):
+                return True
+            return self._is_lock_stale_by_mtime(lock_path, now)
+        return self._is_lock_stale_by_mtime(lock_path, now)
+
+    def _is_lock_stale_by_mtime(self, lock_path: str, now: float) -> bool:
+        """基于文件时间判断锁是否过期"""
+        try:
+            mtime = os.path.getmtime(lock_path)
+            return now - mtime > self.LOCK_STALE_SECONDS
+        except Exception as e:
+            logger.warning(f"Cache lock stat error: {e}")
+            return False
+
+    def _remove_lock_file(self, lock_path: str, reason: str = "") -> bool:
+        """删除锁文件"""
+        try:
+            os.remove(lock_path)
+            if reason:
+                logger.info(f"Cache lock removed: {lock_path} ({reason})")
+            return True
+        except FileNotFoundError:
+            return True
+        except Exception as e:
+            logger.warning(f"Cache lock remove error: {e}")
+            return False
+
     def _acquire_lock(self, cache_key: str) -> Optional[str]:
         """获取缓存锁（跨进程安全）"""
         if not self.enabled:
@@ -111,9 +205,14 @@ class MaterialCache:
         while True:
             try:
                 fd = os.open(lock_path, os.O_CREAT | os.O_EXCL | os.O_WRONLY)
-                os.close(fd)
+                if not self._write_lock_metadata(fd, lock_path):
+                    return None
                 return lock_path
             except FileExistsError:
+                if self._is_lock_stale(lock_path):
+                    removed = self._remove_lock_file(lock_path, "stale lock")
+                    if removed:
+                        continue
                 if time.monotonic() >= deadline:
                     logger.warning(f"Cache lock timeout: {lock_path}")
                     return None
@@ -126,12 +225,7 @@ class MaterialCache:
         """释放缓存锁"""
         if not lock_path:
             return
-        try:
-            os.remove(lock_path)
-        except FileNotFoundError:
-            return
-        except Exception as e:
-            logger.warning(f"Cache lock release error: {e}")
+        self._remove_lock_file(lock_path)
 
     def is_cached(self, url: str) -> Tuple[bool, str]:
         """
@@ -251,6 +345,66 @@ class MaterialCache:
         finally:
             self._release_lock(lock_path)
 
+    def add_to_cache(self, url: str, source_path: str) -> bool:
+        """
+        将本地文件添加到缓存
+
+        Args:
+            url: 对应的 URL（用于生成缓存键）
+            source_path: 本地文件路径
+
+        Returns:
+            是否成功
+        """
+        if not self.enabled:
+            return False
+
+        if not os.path.exists(source_path):
+            logger.warning(f"Source file not found for cache: {source_path}")
+            return False
+
+        cache_key = _extract_cache_key(url)
+        lock_path = self._acquire_lock(cache_key)
+        if not lock_path:
+            logger.warning(f"Cache lock unavailable for adding: {url[:80]}...")
+            return False
+
+        try:
+            cache_path = self.get_cache_path(url)
+
+            # 先复制到临时文件
+            temp_cache_path = os.path.join(
+                self.cache_dir,
+                f"{cache_key}.{uuid.uuid4().hex}.adding"
+            )
+
+            shutil.copy2(source_path, temp_cache_path)
+
+            # 原子替换
+            os.replace(temp_cache_path, cache_path)
+
+            # 更新访问时间
+            os.utime(cache_path, None)
+
+            logger.info(f"Added to cache: {url[:80]}... <- {source_path}")
+
+            # 检查清理
+            if self.max_size_bytes > 0:
+                self._cleanup_if_needed()
+
+            return True
+
+        except Exception as e:
+            logger.error(f"Failed to add to cache: {e}")
+            if 'temp_cache_path' in locals() and os.path.exists(temp_cache_path):
+                try:
+                    os.remove(temp_cache_path)
+                except Exception:
+                    pass
+            return False
+        finally:
+            self._release_lock(lock_path)
+
     def _cleanup_if_needed(self) -> None:
         """
         检查并清理缓存（LRU 策略）
@@ -292,6 +446,17 @@ class MaterialCache:
             for file_info in cache_files:
                 if total_size <= target_size:
                     break
+                # 从文件名提取 cache_key，检查是否有锁（说明正在被使用）
+                filename = os.path.basename(file_info['path'])
+                cache_key = os.path.splitext(filename)[0]
+                lock_path = self._get_lock_path(cache_key)
+                if os.path.exists(lock_path):
+                    if self._is_lock_stale(lock_path):
+                        self._remove_lock_file(lock_path, "cleanup stale lock")
+                    else:
+                        # 该文件正在被其他任务使用，跳过删除
+                        logger.debug(f"Cache cleanup: skipping locked file {filename}")
+                        continue
                 try:
                     os.remove(file_info['path'])
                     total_size -= file_info['size']

services/storage.py

@@ -9,6 +9,7 @@ import os
 import logging
 import subprocess
 from typing import Optional
+from urllib.parse import unquote
 
 import requests
 
@@ -85,6 +86,7 @@ def upload_file(url: str, file_path: str, max_retries: int = 5, timeout: int = 6
 
     # 检查是否使用 rclone 上传
     if os.getenv("UPLOAD_METHOD") == "rclone":
+        logger.info(f"Uploading to: {url}")
         result = _upload_with_rclone(url, file_path)
         if result:
             return True
@@ -144,6 +146,7 @@ def _upload_with_rclone(url: str, file_path: str) -> bool:
     for src, dst in replace_list:
         new_url = new_url.replace(src, dst)
     new_url = new_url.split("?", 1)[0]  # 移除查询参数
+    new_url = unquote(new_url)  # 解码 URL 编码的字符（如 %2F -> /）
 
     if new_url == url:
         return False