f

tool/ytdlp.py

@@ -165,6 +165,74 @@ def _parse_csv_list(value: Any) -> Optional[List[str]]:
     return parts or None
 
 
+_BROWSER_COOKIES_AVAILABLE: Optional[bool] = None
+_BROWSER_COOKIE_WARNING_EMITTED = False
+
+
+def _browser_cookie_candidate_paths() -> List[Path]:
+    try:
+        home = Path.home()
+    except Exception:
+        home = Path.cwd()
+
+    candidates: List[Path] = []
+    if os.name == "nt":
+        for env_value in (os.getenv("LOCALAPPDATA"), os.getenv("APPDATA")):
+            if not env_value:
+                continue
+            base_path = Path(env_value)
+            if not base_path:
+                continue
+            candidates.extend([
+                base_path / "Google" / "Chrome" / "User Data" / "Default" / "Cookies",
+                base_path / "Chromium" / "User Data" / "Default" / "Cookies",
+                base_path / "BraveSoftware" / "Brave-Browser" / "User Data" / "Default" / "Cookies",
+            ])
+    else:
+        candidates.extend([
+            home / ".config" / "google-chrome" / "Default" / "Cookies",
+            home / ".config" / "chromium" / "Default" / "Cookies",
+            home / ".config" / "BraveSoftware" / "Brave-Browser" / "Default" / "Cookies",
+        ])
+        if sys.platform == "darwin":
+            candidates.extend([
+                home / "Library" / "Application Support" / "Google" / "Chrome" / "Default" / "Cookies",
+                home / "Library" / "Application Support" / "Chromium" / "Default" / "Cookies",
+                home / "Library" / "Application Support" / "BraveSoftware" / "Brave-Browser" / "Default" / "Cookies",
+            ])
+    return candidates
+
+
+def _has_browser_cookie_database() -> bool:
+    global _BROWSER_COOKIES_AVAILABLE
+    if _BROWSER_COOKIES_AVAILABLE is not None:
+        return _BROWSER_COOKIES_AVAILABLE
+
+    for path in _browser_cookie_candidate_paths():
+        try:
+            if path.is_file():
+                _BROWSER_COOKIES_AVAILABLE = True
+                return True
+        except Exception:
+            continue
+
+    _BROWSER_COOKIES_AVAILABLE = False
+    return False
+
+
+def _add_browser_cookies_if_available(options: Dict[str, Any]) -> None:
+    global _BROWSER_COOKIE_WARNING_EMITTED
+    if _has_browser_cookie_database():
+        options["cookiesfrombrowser"] = ["chrome"]
+        return
+    if not _BROWSER_COOKIE_WARNING_EMITTED:
+        log(
+            "Browser cookie extraction skipped because no Chrome-compatible cookie database was found. "
+            "Provide a cookies file via config or --cookies if authentication is required."
+        )
+        _BROWSER_COOKIE_WARNING_EMITTED = True
+
+
 def ensure_yt_dlp_ready() -> None:
     """Verify yt-dlp is importable, raising DownloadError if missing."""
 
@@ -272,7 +340,7 @@ def list_formats(
                 ydl_opts["cookiefile"] = str(cookiefile)
             else:
                 # Best effort attempt to use browser cookies if no file is explicitly passed
-                ydl_opts["cookiesfrombrowser"] = ["chrome"]
+                _add_browser_cookies_if_available(ydl_opts)
 
             if no_playlist:
                 ydl_opts["noplaylist"] = True
@@ -365,7 +433,7 @@ def probe_url(
                 ydl_opts["cookiefile"] = str(cookiefile)
             else:
                 # Best effort fallback
-                ydl_opts["cookiesfrombrowser"] = ["chrome"]
+                _add_browser_cookies_if_available(ydl_opts)
 
             if no_playlist:
                 ydl_opts["noplaylist"] = True
@@ -708,7 +776,7 @@ class YtDlpTool:
                 # Add browser cookies support "just in case" if no file found (best effort)
                 # This uses yt-dlp's support for extracting from common browsers.
                 # Defaulting to 'chrome' as the most common path.
-                base_options["cookiesfrombrowser"] = ["chrome"]
+                _add_browser_cookies_if_available(base_options)
 
         # Special handling for format keywords
         if opts.ytdl_format == "audio":