diff --git a/gnes/preprocessor/video/ffmpeg.py b/gnes/preprocessor/video/ffmpeg.py
index 80a1ab5a..48f5d958 100644
--- a/gnes/preprocessor/video/ffmpeg.py
+++ b/gnes/preprocessor/video/ffmpeg.py
@@ -89,18 +89,27 @@ def pic_weight(images: List['np.ndarray']) -> List[float]:
 
     def duplicate_rm_hash(self,
                           images: List['np.ndarray']) -> List['np.ndarray']:
-        hash_list = [phash_descriptor(_) for _ in images]
+        hash_list = []
+        for _ in images:
+            try:
+                hash_list.append(phash_descriptor(_))
+            except Exception:
+                hash_list.append(False)
+                self.logger.info('Broken image: ignored !')
         ret = []
         for i, h in enumerate(hash_list):
             flag = 1
             if len(ret) >= 1:
                 # only keep images with high phash diff
                 # comparing only last kept 9 pics
-                for j in range(1, min(len(ret) + 1, 9)):
-                    dist = abs(ret[-j][1] - h)
-                    if dist < self.phash_thresh:
-                        flag = 0
-                        break
+                if h:
+                    for j in range(1, min(len(ret) + 1, 9)):
+                        dist = abs(ret[-j][1] - h)
+                        if dist < self.phash_thresh:
+                            flag = 0
+                            break
+                else:
+                    flag = 0
             if flag:
                 ret.append((i, h))