private function _get_poster_image_url()
{
$es = new entity_selector();
$es->add_type(id_of('image'));
$es->add_right_relationship($this->media_work->id(), relationship_id_of('av_to_primary_image'));
$results = $es->run_one();
if (!empty($results)) {
reason_include_once('classes/sized_image.php');
$primary_image = current($results);
$rsi = new reasonSizedImage();
$rsi->set_id($primary_image->id());
$rsi->set_height($this->_get_closest_size($this->get_embed_height(), array(240, 360, 480)));
$rsi->allow_enlarge(false);
return $rsi->get_url();
} else {
return false;
}
}
