'Returns a full show dir/metadata/episode.jpg path for MediaBrowser
episode thumbs.
ep_obj: a TVEpisode object to get the path from'

@staticmethod
def get_episode_thumb_path(ep_obj):

    if os.path.isfile(ep_obj.location):
        tbn_file_name = replaceExtension(os.path.basename(ep_obj.location), u'jpg')
        metadata_dir_name = os.path.join(os.path.dirname(ep_obj.location), u'metadata')
        tbn_file_path = os.path.join(metadata_dir_name, tbn_file_name)
    else:
        return None
    return tbn_file_path
