Fix video batching to videollava (#32139)

---------
Co-authored-by: Merve Noyan <mervenoyan@Merve-MacBook-Pro.local>

src/transformers/models/video_llava/image_processing_video_llava.py

@@ -55,7 +55,10 @@ def make_batched_videos(videos) -> List[VideoInput]:
     if isinstance(videos, (list, tuple)) and isinstance(videos[0], (list, tuple)) and is_valid_image(videos[0][0]):
         return videos
 
-    elif isinstance(videos, (list, tuple)) and is_valid_image(videos[0]) and len(videos[0].shape) == 4:
+    elif isinstance(videos, (list, tuple)) and is_valid_image(videos[0]):
+        if isinstance(videos[0], PIL.Image.Image):
+            return [videos]
+        elif len(videos[0].shape) == 4:
             return [list(video) for video in videos]
 
     elif is_valid_image(videos) and len(videos.shape) == 4:

tests/models/video_llava/test_image_processing_video_llava.py

@@ -97,8 +97,7 @@ class VideoLlavaImageProcessingTester(unittest.TestCase):
             torchify=torchify,
         )
 
-    def prepare_video_inputs(self, equal_resolution=False, torchify=False):
-        numpify = not torchify
+    def prepare_video_inputs(self, equal_resolution=False, numpify=False, torchify=False):
         images = prepare_image_inputs(
             batch_size=self.batch_size,
             num_channels=self.num_channels,
@@ -108,8 +107,8 @@ class VideoLlavaImageProcessingTester(unittest.TestCase):
             numpify=numpify,
             torchify=torchify,
         )
-
         # let's simply copy the frames to fake a long video-clip
+        if numpify or torchify:
             videos = []
             for image in images:
                 if numpify:
@@ -117,6 +116,10 @@ class VideoLlavaImageProcessingTester(unittest.TestCase):
                 else:
                     video = image[None, ...].repeat(8, 1, 1, 1)
                 videos.append(video)
+        else:
+            videos = []
+            for pil_image in images:
+                videos.append([pil_image] * 8)
 
         return videos
 
@@ -197,7 +200,7 @@ class VideoLlavaImageProcessingTest(ImageProcessingTestMixin, unittest.TestCase)
         # Initialize image_processing
         image_processing = self.image_processing_class(**self.image_processor_dict)
         # create random numpy tensors
-        video_inputs = self.image_processor_tester.prepare_video_inputs(equal_resolution=True)
+        video_inputs = self.image_processor_tester.prepare_video_inputs(numpify=True, equal_resolution=True)
         for video in video_inputs:
             self.assertIsInstance(video, np.ndarray)
 
@@ -211,6 +214,24 @@ class VideoLlavaImageProcessingTest(ImageProcessingTestMixin, unittest.TestCase)
         expected_output_video_shape = (5, 8, 3, 18, 18)
         self.assertEqual(tuple(encoded_videos.shape), expected_output_video_shape)
 
+    def test_call_pil_videos(self):
+        # Initialize image_processing
+        image_processing = self.image_processing_class(**self.image_processor_dict)
+        # the inputs come in list of lists batched format
+        video_inputs = self.image_processor_tester.prepare_video_inputs(equal_resolution=True)
+        for video in video_inputs:
+            self.assertIsInstance(video[0], Image.Image)
+
+        # Test not batched input
+        encoded_videos = image_processing(images=None, videos=video_inputs[0], return_tensors="pt").pixel_values_videos
+        expected_output_video_shape = (1, 8, 3, 18, 18)
+        self.assertEqual(tuple(encoded_videos.shape), expected_output_video_shape)
+
+        # Test batched
+        encoded_videos = image_processing(images=None, videos=video_inputs, return_tensors="pt").pixel_values_videos
+        expected_output_video_shape = (5, 8, 3, 18, 18)
+        self.assertEqual(tuple(encoded_videos.shape), expected_output_video_shape)
+
     def test_call_pytorch(self):
         # Initialize image_processing
         image_processing = self.image_processing_class(**self.image_processor_dict)