Internal change

PiperOrigin-RevId: 476987858

official/projects/yt8m/dataloaders/utils.py

@@ -178,7 +178,7 @@ def make_yt8m_example(num_segment: int = 5) -> tf.train.SequenceExample:
       i * 5 for i in range(num_segment)
   ]
   seq_example.context.feature["segment_scores"].float_list.value[:] = (
-      [0.] * num_segment)
+      [0.5] * num_segment)
   tfexample_utils.put_bytes_list_to_feature(
       seq_example, rgb.tobytes(), key="rgb", repeat_num=120)
   tfexample_utils.put_bytes_list_to_feature(

official/projects/yt8m/dataloaders/yt8m_input.py

@@ -295,12 +295,10 @@ class Decoder(decoder.Decoder):
   def decode(self,
              serialized_example: tf.train.SequenceExample) -> Dict[str, Any]:
     """Parses a single tf.train.SequenceExample into video and label tensors."""
-
     contexts, features = tf.io.parse_single_sequence_example(
         serialized_example,
         context_features=self._context_features,
         sequence_features=self._sequence_features)
-
     decoded_tensor = {**contexts, **features}
     for i, name in enumerate(self._feature_names):
       # Convert the VarLen feature to dense tensor.
@@ -330,6 +328,7 @@ class Parser(parser.Parser):
       min_quantized_value=-2,
   ):
     self._num_classes = input_params.num_classes
+    self._label_field = input_params.label_field
     self._segment_size = input_params.segment_size
     self._segment_labels = input_params.segment_labels
     self._include_video_id = input_params.include_video_id
@@ -377,6 +376,8 @@ class Parser(parser.Parser):
     Returns:
       output: dictionary containing batch information
     """
+    if self._label_field and not self._segment_labels:
+      contexts["labels"] = contexts[self._label_field]
     output_dict = _process_segment_and_label(video_matrix, num_frames, contexts,
                                              self._segment_labels,
                                              self._segment_size,

official/projects/yt8m/dataloaders/yt8m_input_test.py

@@ -80,11 +80,14 @@ class Yt8mInputTest(parameterized.TestCase, tf.test.TestCase):
       self.assertCountEqual(['video_matrix', 'labels', 'num_frames'],
                             example.keys())
     batch_size = params.global_batch_size
-    self.assertEqual(
-        example['video_matrix'].shape.as_list(),
-        [batch_size, params.max_frames, sum(params.feature_sizes)])
+    self.assertEqual(example['video_matrix'].shape.as_list(),
+                     [batch_size, params.max_frames,
+                      sum(params.feature_sizes)])
     self.assertEqual(example['labels'].shape.as_list(),
                      [batch_size, params.num_classes])
+    # Check non empty labels.
+    self.assertGreater(np.nonzero(example['labels'][0].numpy())[0].shape[0], 0)
+
     self.assertEqual(example['num_frames'].shape.as_list(), [batch_size, 1])
     if include_video_id:
       self.assertEqual(example['video_ids'].shape.as_list(), [batch_size, 1])
@@ -115,9 +118,11 @@ class Yt8mInputTest(parameterized.TestCase, tf.test.TestCase):
     batch_size = params.global_batch_size * self.num_segment
     self.assertEqual(
         example['video_matrix'].shape.as_list(),
-        [batch_size, params.segment_size, sum(params.feature_sizes)])
+        [batch_size, params.segment_size,
+         sum(params.feature_sizes)])
     self.assertEqual(example['labels'].shape.as_list(),
                      [batch_size, params.num_classes])
+    self.assertGreater(np.nonzero(example['labels'][0].numpy())[0].shape[0], 0)
     self.assertEqual(example['num_frames'].shape.as_list(), [batch_size, 1])
     self.assertEqual(example['label_weights'].shape.as_list(),
                      [batch_size, params.num_classes])
@@ -147,6 +152,7 @@ class Yt8mInputTest(parameterized.TestCase, tf.test.TestCase):
     params.feature_dtypes = ('float32', 'float32')
     params.feature_sizes = (256, 2048)
     params.feature_from_bytes = (False, False)
+    params.label_field = 'clip/label/index'
     params.include_video_id = include_video_id
     reader = self.create_input_reader(params)
 
@@ -171,20 +177,19 @@ class Yt8mInputTest(parameterized.TestCase, tf.test.TestCase):
         'FEATURE/feature/floats'].feature[0].float_list.value
     expected_labels = examples[0].context.feature[
         params.label_field].int64_list.value
-    self.assertAllEqual(
-        expected_feature,
+    self.assertAllEqual(expected_feature,
                         example['video_matrix'][0, 0, params.feature_sizes[0]:])
-    self.assertAllEqual(
-        expected_context,
+    self.assertAllEqual(expected_context,
                         example['video_matrix'][0, 0, :params.feature_sizes[0]])
     self.assertAllEqual(
         np.nonzero(example['labels'][0, :].numpy())[0], expected_labels)
+    self.assertGreater(np.nonzero(example['labels'][0].numpy())[0].shape[0], 0)
 
     # Check tensor shape.
     batch_size = params.global_batch_size
-    self.assertEqual(
-        example['video_matrix'].shape.as_list(),
-        [batch_size, params.max_frames, sum(params.feature_sizes)])
+    self.assertEqual(example['video_matrix'].shape.as_list(),
+                     [batch_size, params.max_frames,
+                      sum(params.feature_sizes)])
     self.assertEqual(example['labels'].shape.as_list(),
                      [batch_size, params.num_classes])
     self.assertEqual(example['num_frames'].shape.as_list(), [batch_size, 1])