fix: black/isort formatting for generation.py and test file

apps/worker/worker_app/tasks/generation.py

@@ -113,8 +113,8 @@ from video_processing.oss_helpers import (
     get_signed_download_url,
     upload_to_oss,
 )
-from video_processing.unified_render_service import UnifiedRenderService
 from video_processing.render_engine_resolver import ENGINE_LEGACY, ENGINE_UNIFIED
+from video_processing.unified_render_service import UnifiedRenderService
 
 # ── 虚拟 Plan / Clip（内存中构建，不写数据库） ────────────────────────────────
 
@@ -619,7 +619,8 @@ def _render_with_legacy_engine(
     import subprocess
 
     main_clips = [
-        c for c in virtual_clips
+        c
+        for c in virtual_clips
         if c.clip_type in ("main", "b_roll", "background")
         or (c.clip_type == "main" and c.config.get("role") == "b_roll")
     ]
@@ -674,17 +675,27 @@ def _render_with_legacy_engine(
     filter_complex = ";".join(fc_parts)
 
     command = [
-        FFMPEG_BIN, "-y",
+        FFMPEG_BIN,
+        "-y",
         *input_args,
-        "-filter_complex", filter_complex,
+        "-filter_complex",
-        "-map", video_label,
+        filter_complex,
-        "-map", audio_label,
+        "-map",
-        "-c:v", "libx264",
+        video_label,
-        "-crf", "23",
+        "-map",
-        "-preset", "medium",
+        audio_label,
-        "-c:a", "aac",
+        "-c:v",
-        "-b:a", "192k",
+        "libx264",
-        "-movflags", "+faststart",
+        "-crf",
+        "23",
+        "-preset",
+        "medium",
+        "-c:a",
+        "aac",
+        "-b:a",
+        "192k",
+        "-movflags",
+        "+faststart",
         str(output_path),
     ]
 
@@ -694,7 +705,9 @@ def _render_with_legacy_engine(
     except subprocess.CalledProcessError as e:
         logger.error(
             "[task_id=%s] [渲染] legacy 引擎 FFmpeg 失败: %s\nfilter_complex: %s",
-            task_id, e, filter_complex[:500],
+            task_id,
+            e,
+            filter_complex[:500],
         )
         raise
 
@@ -880,7 +893,9 @@ def generate_video(self, task_id: str) -> dict:
                 render_elapsed = time.monotonic() - render_start
                 logger.info(
                     "[task_id=%s] [渲染] legacy 引擎完成: 耗时=%.1fs, 时长=%.2fs",
-                    task_id, render_elapsed, render_duration,
+                    task_id,
+                    render_elapsed,
+                    render_duration,
                 )
             else:
                 # 新引擎：UnifiedRenderService 图层架构
@@ -901,7 +916,8 @@ def generate_video(self, task_id: str) -> dict:
                 render_elapsed = time.monotonic() - render_start
                 logger.info(
                     "[task_id=%s] [渲染] unified 引擎完成: 耗时=%.1fs",
-                    task_id, render_elapsed,
+                    task_id,
+                    render_elapsed,
                 )
 
             if gen_task:

tests/unit/test_generation_feature_flag.py

@@ -19,9 +19,10 @@ from unittest.mock import MagicMock, patch
 os.environ.setdefault("JWT_SECRET_KEY", "unit-test-secret-key-for-testing")
 os.environ.setdefault("DATABASE_URL", "sqlite:///test.db")
 
-import pytest
 from pathlib import Path
 
+import pytest
+
 # ── Mock worker 模块以避免数据库连接 ──────────────────────────────────────────
 
 sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", "..", "apps", "worker"))
@@ -68,11 +69,12 @@ class _TestClip:
 
 def test_resolver_unified_when_enabled_100_percent():
     """flag 全局开启（percentage=100）时，返回 unified。"""
+    from video_processing.render_engine_resolver import RenderEngineResolver
+
     from packages.adapters.redis.feature_flag_store import (
         FeatureFlagConfig,
         InMemoryFeatureFlagStore,
     )
-    from video_processing.render_engine_resolver import RenderEngineResolver
 
     store = InMemoryFeatureFlagStore()
     store.set(FeatureFlagConfig(name="render_engine", enabled=True, percentage=100))
@@ -83,11 +85,12 @@ def test_resolver_unified_when_enabled_100_percent():
 
 def test_resolver_legacy_when_flag_disabled():
     """flag 全局关闭时，返回默认引擎 legacy。"""
+    from video_processing.render_engine_resolver import RenderEngineResolver
+
     from packages.adapters.redis.feature_flag_store import (
         FeatureFlagConfig,
         InMemoryFeatureFlagStore,
     )
-    from video_processing.render_engine_resolver import RenderEngineResolver
 
     store = InMemoryFeatureFlagStore()
     store.set(FeatureFlagConfig(name="render_engine", enabled=False, percentage=100))
@@ -98,11 +101,12 @@ def test_resolver_legacy_when_flag_disabled():
 
 def test_resolver_whitelist_overrides_percentage_0():
     """白名单用户即使 percentage=0 也走 unified。"""
+    from video_processing.render_engine_resolver import RenderEngineResolver
+
     from packages.adapters.redis.feature_flag_store import (
         FeatureFlagConfig,
         InMemoryFeatureFlagStore,
     )
-    from video_processing.render_engine_resolver import RenderEngineResolver
 
     store = InMemoryFeatureFlagStore()
     store.set(
@@ -121,11 +125,12 @@ def test_resolver_whitelist_overrides_percentage_0():
 
 def test_resolver_percentage_0_all_legacy():
     """percentage=0 且无白名单时，全部走 legacy。"""
+    from video_processing.render_engine_resolver import RenderEngineResolver
+
     from packages.adapters.redis.feature_flag_store import (
         FeatureFlagConfig,
         InMemoryFeatureFlagStore,
     )
-    from video_processing.render_engine_resolver import RenderEngineResolver
 
     store = InMemoryFeatureFlagStore()
     store.set(FeatureFlagConfig(name="render_engine", enabled=True, percentage=0))
@@ -137,11 +142,12 @@ def test_resolver_percentage_0_all_legacy():
 
 def test_resolver_default_unified_when_flag_off():
     """默认引擎设为 unified 且 flag 关闭时，返回 unified。"""
+    from video_processing.render_engine_resolver import RenderEngineResolver
+
     from packages.adapters.redis.feature_flag_store import (
         FeatureFlagConfig,
         InMemoryFeatureFlagStore,
     )
-    from video_processing.render_engine_resolver import RenderEngineResolver
 
     store = InMemoryFeatureFlagStore()
     store.set(FeatureFlagConfig(name="render_engine", enabled=False, percentage=0))
@@ -170,11 +176,23 @@ def test_legacy_engine_single_clip_keeps_original_fps():
         # 生成 1 秒 30fps 测试视频（带音频）
         subprocess.run(
             [
-                "ffmpeg", "-y",
+                "ffmpeg",
-                "-f", "lavfi", "-i", "color=c=red:s=640x360:d=1:r=30",
+                "-y",
-                "-f", "lavfi", "-i", "anullsrc=r=44100:cl=stereo:d=1",
+                "-f",
-                "-c:v", "libx264", "-pix_fmt", "yuv420p",
+                "lavfi",
-                "-c:a", "aac", "-shortest",
+                "-i",
+                "color=c=red:s=640x360:d=1:r=30",
+                "-f",
+                "lavfi",
+                "-i",
+                "anullsrc=r=44100:cl=stereo:d=1",
+                "-c:v",
+                "libx264",
+                "-pix_fmt",
+                "yuv420p",
+                "-c:a",
+                "aac",
+                "-shortest",
                 str(input_path),
             ],
             check=True,
@@ -222,11 +240,23 @@ def test_legacy_engine_two_clips_concat_duration():
             color = "red" if idx == 0 else "blue"
             subprocess.run(
                 [
-                    "ffmpeg", "-y",
+                    "ffmpeg",
-                    "-f", "lavfi", "-i", f"color=c={color}:s=640x360:d=1:r=30",
+                    "-y",
-                    "-f", "lavfi", "-i", "anullsrc=r=44100:cl=stereo:d=1",
+                    "-f",
-                    "-c:v", "libx264", "-pix_fmt", "yuv420p",
+                    "lavfi",
-                    "-c:a", "aac", "-shortest",
+                    "-i",
+                    f"color=c={color}:s=640x360:d=1:r=30",
+                    "-f",
+                    "lavfi",
+                    "-i",
+                    "anullsrc=r=44100:cl=stereo:d=1",
+                    "-c:v",
+                    "libx264",
+                    "-pix_fmt",
+                    "yuv420p",
+                    "-c:a",
+                    "aac",
+                    "-shortest",
                     str(inp),
                 ],
                 check=True,
@@ -264,11 +294,23 @@ def test_legacy_engine_broll_mode_supported():
 
         subprocess.run(
             [
-                "ffmpeg", "-y",
+                "ffmpeg",
-                "-f", "lavfi", "-i", "color=c=green:s=640x360:d=1:r=30",
+                "-y",
-                "-f", "lavfi", "-i", "anullsrc=r=44100:cl=stereo:d=1",
+                "-f",
-                "-c:v", "libx264", "-pix_fmt", "yuv420p",
+                "lavfi",
-                "-c:a", "aac", "-shortest",
+                "-i",
+                "color=c=green:s=640x360:d=1:r=30",
+                "-f",
+                "lavfi",
+                "-i",
+                "anullsrc=r=44100:cl=stereo:d=1",
+                "-c:v",
+                "libx264",
+                "-pix_fmt",
+                "yuv420p",
+                "-c:a",
+                "aac",
+                "-shortest",
                 str(input_path),
             ],
             check=True,
@@ -276,8 +318,10 @@ def test_legacy_engine_broll_mode_supported():
         )
 
         clip = _TestClip(
-            asset_id="asset-1", duration=1.0,
+            asset_id="asset-1",
-            clip_type="main", config={"role": "b_roll"},
+            duration=1.0,
+            clip_type="main",
+            config={"role": "b_roll"},
         )
         asset_path_map = {"asset-1": input_path}