How To Make Timthumb Get Youtube and Vimeo Video Thumbnails, Add Default Thumbnail When No Images Are Present

One of our main portfolio pieces is a music blog called SalaciousSound that I started about 2 years back. I’ve been using timthumb on the site for about 6 months, though when I first added it I wasn’t able to grab thumbnails for videos, and it also didn’t handle posts without images well. I’ve added two pieces of functionality to the function that calls timthumb, catch_that_image(), which resides in my theme’s functions.php file. The former grabs thumbs from videos as the title describes, and the latter just adds a default image that I have defined if the function can not find an image or a video to get a thumbnail from.

function catch_that_image() {
global $post, $posts;
$first_img = '';
ob_start();
ob_end_clean();
$output = preg_match_all('//i', $post->post_content, $matches);
$first_img = $matches [1] [0];
if ( $first_img != '' ) {
return urlencode($first_img);
}
/*
$match = array();
preg_match("/http://www.youtube.com/v/([^"][a-zA-Z0-9-_]+)[&"]/siU",$post->post_content,$match);
if ( $match[1] != '' ) {
return 'http://img.youtube.com/vi/'.$match[1].'/0.jpg';
}
$vimmatch = array();
preg_match('@vimeo.com/[^"&d]*([^"&]+)@i', $post->post_content, $vimmatch);
if ($vimmatch[1] != '') {
$vimhash = unserialize (file_get_contents ("http://vimeo.com/api/v2/video/".$vimmatch[1].".php"));
return $vimhash[0]['thumbnail_medium'];
}
*/
else { return 'http://url.com/wp-content/themes/themefolder/images/defaultimage.png'; }

}