code: def test_open_video_failure(self):
      with pytest.raises(FileNotFoundError):
          test_video = EncodedVideo.from_path("non_existent_file.txt")
          test_video.close()
  
file_path: pytorchvideo/tests/test_data_encoded_video.py
imports: import tempfile
  import unittest
  import pytest
  from pytorchvideo.data.encoded_video import EncodedVideo
  from pytorchvideo.data.encoded_video_pyav import EncodedVideoPyAV
  from utils import temp_encoded_video, temp_encoded_video_with_audio
label_desc: Use image node_id 6 for calling the TestEncodedVideo obj's underlying member method code with example usage: obj.test_open_video_failure() without return types