Update app.py

app.py

@@ -48,12 +48,25 @@ def sec_to_hms(sec: int) -> str:
     return f"{h:02d}:{m:02d}:{s:02d}"
 
 def download_audio(url: str, out_path: Path) -> Path:
+    """
+    Download best audio via yt_dlp, always using cookies.txt in the repo root.
+    """
+    repo_root = Path(__file__).parent
+    cookie_path = repo_root / "cookies.txt"
+    if not cookie_path.is_file() or cookie_path.stat().st_size == 0:
+        raise FileNotFoundError(
+            f"No valid cookies.txt found at {cookie_path}. "
+            f"Make sure you uploaded your Netscape-format cookie jar."
+        )
+
     opts = {
         "format": "bestaudio/best",
         "outtmpl": str(out_path.with_suffix(".%(ext)s")),
-        "postprocessors": [],
+        "cookiefile": str(cookie_path),
         "quiet": True,
     }
+    print(f"[download_audio] using cookiefile: {opts['cookiefile']}")
+
     with YoutubeDL(opts) as ydl:
         info = ydl.extract_info(url, download=True)
         filename = ydl.prepare_filename(info)