/**
* Get URL of YouTube video screenshot
*
* This method returns URL of YouTube video screenshot. It can get one of three screenshots defined by YouTube
*
* @access public
* @param string $url YouTube video URL. If this cannot be parsed it will be used as video ID. It can be omitted
* @param integer $imgid Number of screenshot to be returned. It can be 1, 2 or 3
* @return string URL of YouTube video screenshot
*/
public function GetImgURL($url = null, $imgid = 1)
{
if ($url == null) {
$videoid = $this->id;
} else {
$videoid = YouTube::parseURL($url);
if (!$videoid) {
$videoid = $url;
}
}
return "http://img.youtube.com/vi/{$videoid}/{$imgid}.jpg";
}
