diff --git a/av1-transfer/main.py b/av1-transfer/main.py
index fe97877..32f5e79 100644
--- a/av1-transfer/main.py
+++ b/av1-transfer/main.py
@@ -75,19 +75,19 @@ def _set_proc_title(title: str) -> None:
 
 def get_duration(input_path):
     """用 ffprobe 获取视频时长（秒），失败返回 None"""
-    result = subprocess.run(
-        [
-            "ffprobe", "-v", "error",
-            "-show_entries", "format=duration",
-            "-of", "default=noprint_wrappers=1:nokey=1",
-            str(input_path),
-        ],
-        capture_output=True,
-        text=True,
-    )
     try:
+        result = subprocess.run(
+            [
+                "ffprobe", "-v", "error",
+                "-show_entries", "format=duration",
+                "-of", "default=noprint_wrappers=1:nokey=1",
+                str(input_path),
+            ],
+            capture_output=True,
+            text=True,
+        )
         return float(result.stdout.strip())
-    except (ValueError, AttributeError):
+    except Exception:
         return None