code: def test_ffmpeg_decode_video_invalid_index(video_path):
      """test_ffmpeg_decode_video_invalid_index"""
      content = tf.io.read_file(video_path)
      with pytest.raises(tf.errors.InvalidArgumentError):
          tfio.experimental.ffmpeg.decode_video(content, 1)
  
file_path: io/tests/test_ffmpeg.py
imports: import os
  import sys
  import pytest
  import numpy
  import tensorflow
  import tensorflow_io
label_desc: Use image node_id 7 for calling a global function with example usage: test_ffmpeg_decode_video_invalid_index(video_path) without return types