class_docstr: Test ActionClip model
code: def test_encode_video(self):
      vis_feats = self.model.encode_video(self.video)
      self.assertEqual(vis_feats.shape, (1, 512))
  
imports: import unittest
  import torch
  from towhee.models import action_clip
  from towhee.models import clip
label_desc: Use image node_id 1 for calling the TestActionClip obj's underlying member method code with example usage: obj.test_encode_video() without return types