first commit

backend/main.py

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+import os
+
+import uvicorn
+from starlette.staticfiles import StaticFiles
+from dotenv import load_dotenv
+
+from app import create_app
+from app.db.video_task_dao import init_video_task_table
+from app.transcriber.transcriber_provider import get_transcriber
+from ffmpeg_helper import ensure_ffmpeg_or_raise
+
+load_dotenv()
+
+# 读取 .env 中的路径
+static_path = os.getenv('STATIC', '/static')
+out_dir = os.getenv('OUT_DIR', './static/screenshots')
+
+# 自动创建本地目录（static 和 static/screenshots）
+static_dir = "static"
+if not os.path.exists(static_dir):
+    os.makedirs(static_dir)
+
+if not os.path.exists(out_dir):
+    os.makedirs(out_dir)
+
+app = create_app()
+app.mount(static_path, StaticFiles(directory=static_dir), name="static")
+
+@app.on_event("startup")
+def check_env():
+    ensure_ffmpeg_or_raise()
+@app.on_event("startup")
+async def load_model_on_startup():
+    get_transcriber()
+
+@app.on_event("startup")
+def startup():
+    init_video_task_table()
+
+if __name__ == "__main__":
+    port = int(os.getenv("BACKEND_PORT", 8000))
+
+    host = os.getenv("BACKEND_HOST", "0.0.0.0")
+    uvicorn.run("main:app", host=host, port=port, reload=True)