Converts the given image into a dict convertible to tf example.

def encode_example(self, video_or_path_or_fobj):
    """Converts the given image into a dict convertible to tf example."""
    if isinstance(video_or_path_or_fobj, six.string_types):
      if not os.path.isfile(video_or_path_or_fobj):
        _, video_temp_path = tempfile.mkstemp()
        try:
          tf.gfile.Copy(video_or_path_or_fobj, video_temp_path, overwrite=True)
          encoded_video = self._ffmpeg_decode(video_temp_path)
        finally:
          os.unlink(video_temp_path)
      else:
        encoded_video = self._ffmpeg_decode(video_or_path_or_fobj)
    elif hasattr(video_or_path_or_fobj, 'read'):
      encoded_video = self._ffmpeg_decode(video_or_path_or_fobj)
    else:
      encoded_video = video_or_path_or_fobj
    return super(Video, self).encode_example(encoded_video)