perf(8502): 并行生图(6并发)+超时重试；视频URL直连预览/下载；路径隔离

modules/legacy_path_mapper.py

@@ -0,0 +1,66 @@
+"""
+Legacy path mapper for assets generated by the 8502 runtime (/root/video-flow).
+
+Problem:
+- Postgres `scene_assets.local_path` may contain paths like `/root/video-flow/temp/...`
+  which are not visible inside docker containers running 8503 stack.
+
+Solution:
+- Mount host directories into containers (e.g. /legacy/temp, /legacy/output)
+- Map legacy host paths -> container paths, and produce static URLs accordingly.
+"""
+
+from __future__ import annotations
+
+import os
+from pathlib import Path
+from typing import Optional, Tuple
+
+
+LEGACY_HOST_TEMP_PREFIX = "/root/video-flow/temp/"
+LEGACY_HOST_OUTPUT_PREFIX = "/root/video-flow/output/"
+
+# Container mount points (see docker-compose.yml)
+LEGACY_CONTAINER_TEMP_DIR = "/legacy/temp"
+LEGACY_CONTAINER_OUTPUT_DIR = "/legacy/output"
+
+LEGACY_STATIC_TEMP_PREFIX = "/static/legacy-temp/"
+LEGACY_STATIC_OUTPUT_PREFIX = "/static/legacy-output/"
+
+
+def map_legacy_local_path(local_path: Optional[str]) -> Tuple[Optional[str], Optional[str]]:
+    """
+    Returns: (container_visible_path, static_url)
+    - If local_path exists as-is, returns (local_path, None)
+    - If it's a legacy host path, rewrite to container mount and provide URL
+    - If unknown, returns (local_path, None)
+    """
+    if not local_path:
+        return None, None
+
+    # If container can see it already, keep
+    if os.path.exists(local_path):
+        return local_path, None
+
+    # Legacy host -> container mapping by basename
+    if local_path.startswith(LEGACY_HOST_TEMP_PREFIX):
+        name = Path(local_path).name
+        container_path = str(Path(LEGACY_CONTAINER_TEMP_DIR) / name)
+        url = f"{LEGACY_STATIC_TEMP_PREFIX}{name}"
+        return container_path, url
+
+    if local_path.startswith(LEGACY_HOST_OUTPUT_PREFIX):
+        name = Path(local_path).name
+        container_path = str(Path(LEGACY_CONTAINER_OUTPUT_DIR) / name)
+        url = f"{LEGACY_STATIC_OUTPUT_PREFIX}{name}"
+        return container_path, url
+
+    # Unknown path: keep as-is
+    return local_path, None
+
+
+
+
+
+
+